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Ford/NewHolland Service Manual - MyTractorForum.Com Tractor Forums

1. Valves Guides and Springs Hold the valve assembly in the hand and compress the valve spring as shown in fig 27 Lift one half of the valve guide bushing from the assembly Remove the other half of the valve guide bushing spring and spring retainer fig 26 NOTE Keep the two halves of each valve guide together in pairs s EM Scum wee we me we a 1 CLEANING INSPECTION AND REPAIR Scrape the carbon off the valve heads and stems Clean the valves springs and valve guide bushings WARNING Do not use caustic or any material that will injure the protective coating of paint on the valve springs This paint is necessary to protect the spring from crankcase moisture dd Replace valves that have bent or scored stems Replace any valves the stems of which are worn to less than 0 3065 inch Reface pitted corroded or burned valves Replace valves that are pitted burned or warped that will not clean up with a light cut of the grinding wheel If a cutter was used to reface the valve seats in the cylinder block lap each valve into its seat a VALVE SPRINGS Replace a valve spring if it hae Inet ite wen tective coating of paint or if the tension is less MT RACTAR ATIS Wil d more than 34 pounds when compressed to 2 13 i 124 c 1 a 3695 47 RM 6 9 Fig 28 Checking Valve Spring Tension b VALVE GUIDES NOTE Any new valve guides that are to be used should be used as intake valve guides in
2. 4 High Fourth 19 86 to1 9 40 M P H 12 54 M P H 5 Reverse 44 64 tol 4 19 M P H 5 58 M P H b Capacities U S Measure Fuel EDs uos rau ERGO RE HU a ee 4 af ee SCRI E 9 gals standard 1 gal reserve 10 gals tota Engine oil pan less filter absorption 005 6 qts Transmission hydraulic lift and differential 5 gals Cooling system Lille eher 12 qts Oil bath air cleaner Fill to indicated level Belt pulley naana naana aaa aaa a al l qt Tire pressure 10 00 x 28 4 ply uuuu uu 4 00 x 19 4 ply ilsussss 3730 47 112 c c Engine s eere ee ee LIO 4 cylinder L head Rated speeds sseeeee enn n 1500 and 2000 R P M Idle speed e n n n 400 R P M Cylinder bore lssisssee ee n nn 3 188 in Stroke ccc ce hy mmm hh bassa aem i 3 75 in Piston displacement sss nn 119 7 cu in TOPGUG cunasanesqoecc su RAW E Rn 84 lbs ft at 1500 R P M Compression ratio llle hr hh hm 6 0 to 1 Sleeves oo eee that hc hrs Dry type Piston BCRREECRCTREREEETERLTTSTITTTIRTITOITTITDTOLITIT Cast steel Rings Compression sse hh ehh hme n 2 Oil oe hg oe he a ee ek A rcc e Piston ill oc eh es had Od eee eee es Full floating Rod bearings ee et Replaceable sheil type Main bearings eer n m mme Replaceable shell type Crankshaft Cast steel static and dynamic
3. Fig 17 Hydraulic Unit Assembiy CONSTANT DRAFT CONTROL SPRING E Uh H CONTROL SPRING PLUNGER e egit endear pe Fig 21 Install Constant Draft Control Linkage Assembly The hydraulic unit may be assembled by sub assemblies The sequence of assembling subassemblies onto the hydraulic unit cover may be changed from that given below 1 ASSEMBLE LIFT ARMS AND SHAFT Hold the ram arm in place in the hydraulic unit cover and install the shaft Install the two bushings fig 20 on the shaft Install the two lift arms on the shaft and secure each arm to the shaft with a flat washer lock Washer and two cap screws The lift arms should be tightened enough to prevent end play of the shaft The lift arms should not bind to the extent that they will not settle under their own weight 22 ASSEMBLE CONTROL LINKAGE Install the draft con trol linkage as shown in fig 21 Place the position control linkage on the hydraulic touch control lever shaft and insert this assembly in the hydraulic unit cover Install the control arm on the draft control linkage and the hydraulic touch control lever shaft Secure the con trol arm in place with a castellated nut and cotter pin Position the three cornered plate with the pin at the top on the hydraulic unit cover and secure with three cap screws Install a new felt washer in the control spring seat In I control spring and yoke fg 18 Moun OL gasket on the hydraulic u
4. The Model 8N Ford tractor is equipped with a four forward speed constant mesh transmission 131 DISASSEMBLY The transmission comprises seven principle subassemblies These should be removed as follows a Remove Subassemblies Remove the cover assembly Remove the top shift rail and plates by loosening the nut on the shift fork and turning out the screw until the shaft is free to slide on the fork Slide the shift rail out of the rear of the housing The inter lock spring and ball will fall from the top of the housing as the rail is removed Remove the large shift pivot screws from each outside face of the housing and remove the shift plates Disconnect the clutch release bearing retaining springs and remove the bearing MAIN SHAFT BEARING RETAINER MAIN SHAFT INTERLOCK BALL PLUG V9 Witla Ta CAM Fig 9 Transmission Hann fete mae NH We rim Hy r 3730 47J SHIFT FORK LOCK SCREW SHIFT PLATE CAP SCREW FORK X SHIFT RAIL T OE EE i SHIFT FORK EE LOCK SCREW MERRE O SE aie ed mad s M as Ml Bee ae fe Ae dec etiem suh DNA 21 im wt Lam INTERLOCK SPRING VE m wage Imt TOUSSAINT ry A SHIFT RAIL FORK SHIFT PLATES SHIFT FORK LOCK SCREW RM 642 Fig 0 Transmission With Cover Removed To remove the main drive gear bearing retainer assembly hold the shaft and retainer together and remove the retainer and gear as a unit Remove the main
5. 006 SAUTE These clearances should be carefully checken meree r mec l2ploceees The use of Plastigage as made available to the field by the Parts Department in their Parts and Accessories Bulletin 81 will materially reduce the time and effort required to accurately check these Clearances Liners in which the clearance is not within the above wear limit should be replaced 2 Presence of foreign material in the liner Excessive amounts of foreign material embedded in the fece of the liner may eventually cause unnecessary wear in the journals and therefore justifies replacing the liners How ever slight amounts of foreign material will do no harm and should not be considered as cause for liner replecement J Liner Fatigue This condition is indicated by areas in the face of the Liner deteriorating or crumbling away leaving a ragged opening or pit in the face of the liner Bearings otherwise satisfactory but with small pits need not be replaced Bearings must be replaced where pits extend to the side of the liner and permit oil to escape le Discoloration Bearing liners may sometimes be discolored This is not zs harmful and will not shorten the life of the bearing Discoloration in we itself is not justification for replacing the bearing liners 5 Unnecessary Replacement It is important that the need for bearing liner replacement be fully established before such action is taken Our records indicate a tendency
6. 37292l9 C it will be necessary for dezlers to inform customers of the new location of these toe in marks The procedure for adjusting the turnbuckle on the drag links remains the same However be sure to _ align the slot in the steering arm with the toe in msrk on the spindle D housing uis ca ELECTRICAL Bulletin Subject Installation of Generator 8N LOOOO B on 2N and 9N Tractors l NEW PARTS REQUIRED Widvaud Lee A 8N 10000 B Generator B 2N 100h2 Kit This kit contains all parts nec veers eneyeee installation 2 INSTALLATION PROCEDURE Complete installation instructions and a wiring diagram are in Attachment 8 Please note that the new N 10000 B generator can only be used in conjunction with the new 8N 10505 C regulator 3 SECURING GENERATORS AND KITS When ordering a complete conversion assembly order Generator 8N 100008B and Kit No 2N 10042 in the usual manner a Bulletin Subject Carburetors on 8N Ford Tractors Since the introduction of the 8N Ford Tractor several changes have been made in the carburetor to obtain greater fuel economy and better tractor performance The information in Attachment 9 will aid in identifying the several variations of the carburetor that have been used and outlines a procedure to use in the field service of this assembly MISCELLANEOUS QR GENERAL Bulletin Subject BN Tractor Changes Consistent with the efforts of the entire organization to cont
7. and lock rings PiyTractorF orom com 8 153 3730 47 Y BEARING WEDGE V AXLE SHAFT BEARING fi i H P a Tn P 5 asi iq 7 Puller mE ueri Lr Pe RA 5 a y 75 IK eof Pr YT zia isla pu an m Wes A Fig 43 Insfalling Axle Shaft Bearing e Axle Shaft Bearing Retainer Replace the bearing race subpar 1 below if it is scored or pitted Discard all used gaskets and oil seals 1 REAR AXLE OIL SEAL AND BEARING RACE RE PLACEMENT To remove the rear axle oil seal or bearing race drive it out of the retainer with a brass drift To install drive it into the retainer with a driver that applies pressure evenly on the race or oil seal 153 ASSEMBLY Place the drive pinion sleeve in a vise equipped with brass jaws Be sure that the bearings are thoroughly clean and that they have not been lubricated The lubricant should not be applied to the bearings until after the bearing tension has been adjusted Slide the drive pinion and bearing in the sleeve Place the other bearing and the thrust washer on the pinion Install the bearing adjusting nut and tighten the nut using two 21 4 inch thin open end wrenches until a torque of 12 to 16 pounds inches is required to turn the pinion After the correct adjustment is obtained hold the adjusting nut with the wrench and install the lock washer and lock nut Tighten the lock nut while holding the adjusting nut stationary Recheck the torque
8. the nuts Position the differential assembly in the center housing with tbe flat side of the drive gear facing the left hand axle housing Place a new gasket on the center housing Position the axle housing on the center housing Install and tighten the nuts Install the axle shafts in the housings Install the gaskets and the oil seal retainers on the bearing retainers Secure the brake shoe brackets to the bearing retainers with two cap screws in each bracket Coat each axle housing flange with a light film of grease Position the gaskets on the axle housings Remove several of the shims of the shim pack previously used on the bearing retainer and place the remainder of the pack between the brake plate and the bearing retainer Hold the brake cross shaft in position and install the brake plate and bearing retainer assembly on the axle housing Rotation of one axle shaft should now cause zthe other shaft to rotate in the same direction If it does not more shims must be removed Increase the shim pack thickness in steps of approximately 0 005 inch It may be necessary to exchange thick shims for thin ones or vice versa to produce the required addition The shim thickness must be increased until the rotation of one shaft causes the other to rotate in the opposite direction By following this procedure the amount of end piay in the axles will be held to the desired limits 0 002 to 0 004 inch Install the hubs seals flat washers nuts
9. to the battery terminal on voltage regulator 5 Connect the leads as follows l Generator field to voltage regulator field black with white tracer 2 Generator ground to voltage regulator ground black with red tracer J Generator armature to voltage regulator armature yellow with black tracer A TRACTORE ORUM COM INSTALLATION DIAGRAM FOR INSTALLING BR 10000B GENERATOR ON 2N and SN TRACTORS ATTACHMENT 8 Page 2 of 2 2N 1h305 Wiring Assy Clip 914 100B2 Generator to Voltage h Req Regulator Field Gnd T _ amp li Regulator 4 f cer E f ki pend rator pg ph i wi 88 10505 8 ff N Additional Parts Required nof shon on diagram 1 24 10i181 B Generator belt adjusti clamp 1 28 10599 Bracket mounting regulai 31 33795 51 8 hex nut j 20 mounting regulator to twaelcet 3 3 805 57 8 L washer i mountin regulator to bracket 2 35019 58 hex nut 410 32 Generato field and ground terminal 2 35803 858 lockwasner 10 senera De field and ground terminals 1 3081 SB hex nut 1 28 generate armature terminal 1 34825 58 lockwasher generator armature terminal SN 114401 C Wot Part of This Assembly original wire Originai battery wire was connected to cutoul i Starter Relay NS Generator field to voltage regulator Black with white tracer Generator ground to voltage regulator Black with red tracer Generator armature to voltage regulator Yellow with black
10. 15 minutes and drive the insert in place in the counterbore assures the insert iind into place evenly Re AL LTTS TORF ORUM insert par e below Oo amp 199 4 com 8N Sleeve Removal had the same problem Read all of the previous postings Finally after trying to pull the sleeves out intact very difficult to catch the 0 040 lip crushed each and removed them Took about 15 minutes ground an old Craftsman screwing tool one with a 1 4 inch blade to the approximate radius of the casting and a slight radius on the bottom Then very carefully tapped the 0 040 inch sleeve inwards from the top crushing it into the cylinder with each tap Since the screw driver is rather short had to flip the block and to the same thing from the bottom aligning the crush apex begin from the top The sleeves flaked and broke into pieces when used a larger tool like the one pictured in the literature This made it impossible to get a continuous crush tried several other approaches and this seemed to work just fine cannot recommend this procedure with the so called 0 090 sleeves but it seems to work with the 0 040 sleeves m rebuilding a replacement block It already had the sleeve for Z1removed noticed a small gouge in the 1casting looks like someone used a similar method removing that sleeve but was a bit more aggressive So be very careful not to gouge your casting Good luck MyTractorF orom com Pk G0 s oj
11. Accessories Bulletin No 267 dated December 1 1952 announced the availability of oversized pistons and ring sets These perts mav onlv be used in GN tractors which incorporate the cast iron Sleeve r f Er T4 T add di Ag it is necessary to rebore and hone the sleeves to obte FT RACI ARF oro cor fit to cylinder bore of 5 10 pounds pull using e C In Attachment 6 instructions outline the correct procedure for installing the following oversize piston assemblies and ring sets PISTON ASSEMBLIES RING SETS ON 6108 D 020 0 5 ON 61h9 D 020 0 5 8N 6108 E 2030 OS SN GLh9 E 2030 0 5 8N 6108 F 040 0 5 8N 61h9 F OhO O S Instructions should be followed in detail to obtain satisfactory results IGNITION Bulletin Subject Installing and Timing the Angle Drive Distributor on the ON Tractor This bulletin and attachment 7 constitute the complete instructions for in stslling and timing the new angle drive distributor announced in Service Bulletin No lik dated March 30 1950 Replacement parts for the new angle drive distributor are covered in Service Parts Release and Change Notice 50 This distributor can be installed and timed without instrumentation but we strongly advise the use of a stroboscopic timing light In the interest of quality service and in order to assure maximum tractor performance we re commend that every one of your dealers not so ecuipped purchase one of these timing lights Such a
12. Balance of piston ring to 0 0010 in to groove side clearance 0 0025 in 0 004 in Piston ring end gap 0 012 in to Myvi WT T Torr PETITS CAN 0 017 in 142 3695 47 VALVES Connecting rod castellated nuts Connecting rod self locking nuts Flywheel cap screws Flywhecl self locking cap screws Spark plugs 2606_a7 m C CY 39 euu a Y o a a a d A E fF 8 E E E 8 E 8 E Y O3 4 8 amp 8 O3 Yo T Uo S T FF mo NW H3 s fF gt g b d LI b FIT oso BONNAT R UR Stem to guide clearance 0 0025 in to exhaust 0 0045 in 0 006 in Running Stem to guide clearance 0 0015 in to intake 0 0035 in 0 005 in Running Valve seat angle 45 degrees Spring tension at 2 125 inches 31 to 34 lbs 30 lbs Clearance between valve stem and push rod exhaust 0 14 to 0 16 in 0 015 1n Clearance between valve stem and push rod intake 0 010 to 0 012 in 0 013 in OIL PUMP Clearance between 0 002 1n to driven gear and shaft 0 0035 in 0 005 in Running CRANKSHAFT FIT ostro TOREA DEM DERT Crankshaft end play 0 002 in to 0 006 1n 0 008 in Main bearing clearance 0 000 in to 0 003 in 0 005 in Running Crankpin to connecting 0 0013 in to Running rod clearance 0 0035 1n 0 005 in and Floating 143 TORQUE WRENCH READINGS Main bearing nuts llle een 75 to 80 Ibs ft Self locking main bearing bolts 00000505 100 1bs ft 35 to 40 lbs ft T
13. Bend the tabs of the lock washer over both the lock nut and the adjusting nut Be sure that the drive pinion surface on the center housing has no nicks or high spots Place the drive pinion assembly in position on the center housing Line up the dowel pin in the sleeve of the ninian with the hole in the housing Install the MvT pac rap aen CAE pressure to the drive pinion shaft fig 3730 47 183 NUT 351047 HYDRAULIC TOUCH CONTROL LEVER SHAFT 517 SPRING 522 POSITION CONTROL LINKAGE WASHER 34748 NUT 33965 5 BOLT 20302 57 GASKET 532 QUADRANT 515 BUSHING 691 v CONSTANT DRAFT ore oO SPRING 539 NUT 33965 S CONNECTING LNK 54077 RETAINER 520 BOLT 2 1443 87 Se 41 CONTROL ARM 504 SWIVEL 692 FRICTION DISC 518 PIN 73956 e HYDRAULIC TOUCH CONTROL LEVER 512 L 529 SUPPORT PLATE 624 A COVER PLATE 527 SPRING s A SPRING 547 bA YOKE 546 C T Fig 18 Hydraulic Control Linkage 2 REMOVE CONTROL LINKAGE Remove the hydraulic touch control lever retainer fig 18 from the quadrant Remove the nut spring and fiat washer that secure the hydraulic touch control lever shaft Remove the hydraulic touch control lever woodruff key and the friction disk from the shaft Remove the cotter pin that attaches the linkage which secures the _ Position control lever to the position control linkage figs 17 and 18 Remove the cont
14. Cap has been removed This bearing has 0015 clearance FITTING MAIN amp CONNECTING ROD BEARINGS Place a piece of Plastigage on the full width of the bearing insert Install bearing cap and tighten nuts evenly with a torque wrench to 35 40 ft pounds Allow caps to remain tightened approximately one minute before removing caps to check Plastigage for oil clearance Rewove bearing Flattened Plastigage will be found adhering to either bearing shell or crankshaft Determine bearing clear ance by comparing width of flattened plastic at widest point with graduation on container If the clearance exceeds 003 on the main bearings they should be replaced Replace the connecting rod bearings if the clearance exceeds 003 CONNECTING ROD AND PISTON ASSEMBLY FIT LOCATION ORIGINAL FIT FIT WEAR TYPE OF NAME TOLERANCES LIMIT FIT Connecting rod side 004 in to Piston pin clearance in 0001 in to connecting rod 0005 in loose 0012 in Slip Piston pin clearance 000 in to in piston 0002 in loose 0012 in Light Push Piston and cylinder 5 10 pounds pull 5 10 pounds on 002 x Lg in on 003x l4 shim in shim Top piston ring to 0015 in to groove side clearance 0030 in 004 in Second ring 001 0025 0035 in Oil ring 0015 003 004 in Top ring gap 007 017 in 030 in Second ring gap 010 017 Oil ring gap 010 017 CRANKSHAFT FIT LOCATION ORIGINAL FIT FIT WEAR TYPE OF NAME TOLE
15. Remove the nut and flat washer from each valve chamber cover Remove the valve guide bushing retainer with a hook type remover fig 4 from all valves that are in the closed position Turn the crankshaft until those valves which were in an open positio Lu 7 the above procedure and remove the remaining MvTpacror Mi retainers Remove the valve assemblies from the ENS 113 f COM VALVE ASSEMBLY eX wu DE KALI pm Fig 5 Removing Valve Assembly a jack type lifter fig 5 As the valves are removed tag or otherwise identify them as to the cylinders from which they were removed Lift the push rods from the cylinder block Slide the camshaft out of the cylinder block being careful not to injure the camshaft bearing surface with the sharp corners of the cams Remove Oil Pump and Oil Pump Screen Cover As sembly Remove the cap screws that secure the oil pan to the cyl Ander block and remove the oil pan Remove the lock wires and cap screws that secure the oil pump screen cover assembly to the oil zpump fig 6 Remove the oil pump screen cover assembly from he engine h Remove Connecting Rod and Piston Assemblies Re move the two nuts from No 1 connecting rod Lift the connecting rod bearing cap from the connecting rod Tap the connecting rod and piston out of the cylinder block with the handle end of a hammer fig 7 Install the connecting rod bearing cap on the connecting rod to prevent the bearing
16. TOUR MODERN 4 SPEED TRACTOR AT 1000 EFH lngins tpl GEAR med PT ipa Speed mits ci ai ejin Dui 133 140 hepian desi 1 47 Ja Pundard Tu iA 52 FHteeOeern Jra iLiad 40 hari chine all Tra 3 27 353 Hupp Tj 1 74 Ea l nndard Jind IE T4 bepp dang 3 24 Shep Dome dh A au i Ci hep Op ded EB mig t fanned dal A37 163 bap subs 16 15 TTL bep iu ffr irim a 14 Bondord Bayang 1 03 J z hhwp Lz Basspes amp 5 ThE ERAN piadar FTT epee fer PEO malu Ai 1500 APRA Ar TTS RPM Engins Spard At Full Three UTal msrabie ap sdu theer mrt ot nn mapia acaad af 7289 APH adus ie well cesis ee ooljvaimils Damage Gud the gai Fieger Heu oe bue cm TE pam d n hie Dee PUG erd vechin da AZAR eed nasa ox RIS be Bab ER HEAVY DRAFT WORK Pes uep Dewn gears below mandari Low art rexly to serve you when you have Cmm joeialled im pour mador You cmn elec heep Down for and operate at full ihoia af 2 77 mph Horepewer d greatly increase ppraoaximately 37 per cent due te the increase engine speed and homer prar tats You can walk shrough tmagh bull dazing pb and other hreavv drafr work chat web sip you withour rhe C om bumanun Take sdvantage of uncooched power in pour wach Td gan an keacy ragt toam gau ecce Die Combination BETTER TRACTION GREATER ECONOMY With H addtional gears to select from yu men maich igine power to load on zwvery held cr Hedge psh pou doth elimin
17. bearing Remove the rest of the gears from the shaft Remove the forward roller bearing and the 20T main drive gear with a bearing puller 2 COUNTERSHAFT ASSEMBLY Remove the rear roller bearing fig 12 with a bearing puller Press the countershaft gear SHIFT RAIL STOP 722 ae INTERLOCK a S SHIFT RAIL 719 INTERLOCK SPRING 7234 F LOCKWASHER Wi 33800 5 ee f i UAE c dier ot BEARING 715 SNAP RING 754 SNAP RING 54 BEARING SUPPC MTS Fig 14 Power Take off Shift Assembly 131 b 2 3730 47 LOCKWASHER 351217 S wu cho 7999 _ SHIFTER LOCK SAFETY LATCH 7257 mir Fig 15 Transmission Cover Disassembled 55T and roller bearing off the countershaft Lift the countershaft fourth gear 36T and sliding coupling from the countershaft fig 12 Remove the countershaft coupling from the countershaft with a gear puller or press Lift the countershaft second gear 18T from the shaft 3 REVERSE IDLER GEAR ASSEMBLY Remove the re verse gear coupling from the reverse idler gear and bushing assembly fig 13 Remove the snap ring thrust washer and reverse idler gear and bushing assembly 4 POWER TAKE OFF SHIFTER ASSEMBLY Remove the snap ring from the rear of the bearing support fig 14 Lift the bear ing and clutch sleeve from the bearing support Remove the nut and lock washer from the shift rail and remove the shift rail toward the rear being caref
18. become scored A scored distributor cam will cause rapid wear of the fiber block This in turn will result in improp tween the contacts and rapid pitting of the points MyTRactorF orom com Corrective measures are as follows l Replace the cam and weights assembly Part No 8N 12176 if found to be scored 2 Install new points with contact spacing of 02 026 3 Lubricate the cam in accordance with the instructions given in Section 36h Paragraph E Page 93 of the Ford Tractor Operator s Manual he Clean the contacts with chloroform after they have been properly spaced install the Dust Shield Kit as outlined in the instructions contained in each kit TRANSMISSION oa amm Bulletin Subject Transmission Jumping Out of Reverse and or Locking in Reverse and Another Gear at the Same Time A few Gases have been reported to us from the field regarding transmissions jumping out of reverse or locking in two gears i e reverse and one of the forward gears and excessive wear on the 8N 7100 Gear and Mating Shaft We have found in these instances that the snap ring groove in the BN 71l1 Gear and Bushing Assembly is not sharp and square or the snap ring itself Part No 9N 7OTO may have the edges on the inside diameter chamfered rather than square To correct this condition install a new GN 71hl gear and bushing assembly or a 9N 7070 Snap Ring whichever is required NOTE This applies to transmissions jumping out of rever
19. drag link is on the right side Change No 11 on Ali Tractors Starting with Serial No 215050 on August 25 19h9 Old No 8N 702 9 Washer reverse idler gear thrust RACTORF ORUM COM New part number remains the same The change involve which are punched in the washer to anchor it to reces This prevents the washer from turning and wearing against the transmission case BULLETIN ATTACHMENTS ATTACHMENT 1 Page 1 INSTALLATION INSTRUCTIONS FOR NEW VALVE IN THE FORD TRACTOR ENGINE A B D C 0002 mm Dod 0 4 CLEARANCE OLE A new type exhaust valve assembly is illustrated and described above The assembly consists of a valve A two keys B a cap C and a special spring retainer D the standard spring being used with this assembly The parts when correctly assembled permit the valve to be en tirely free of the spring force during the lift portion of the cycle At the beginning of lift the tappet lifts the keys through the medium of the cap which in turn lifts the spring retainer and spring thus leaving the valvo free of the influence of the spring with respect to cocking and un due side loading During the normal travel the valve can turn oscillate or otherwise move in its guide With this action the deposits that tend to build up at the head end of the guide and on the stem are constantly scrubbed thus preventing sufficient build up to take up the normal clear ance Furthermore the deposits
20. eben has L head Taxable horsepower 0 002 000 ees 16 2 Number of cylinders lees ana 4 ie HM 3 187 in Piston displacement s een n n 119 5 cu 1n puso m 85 lbs ft at 1200 RPM Firing DEOR raza iot xd ee ee E HE OE YEN Pado sad 1 2 4 3 FAN dfi PUER PIPE OIL FILLER CAP SPARK PLUG WIRE CONDUIT OIL ada CYLINDER HEAD OIL FILTER INLET LINE MATER PUMP 7 men d muerte CYLINDER BLOCK MEN STARTING Zl MOTOR ERLT aN a Pan E eA WATER DRAIN COCK ae OIL LEVEL GAUGE CYLINDER FRONT COVER ONL FILTER RETURN Thin Fig 1 Left 34 Front View 111 3695 47 TRACTORF ORUM COM INTAKE AND d GENERATOR aga FAN BELT ZEE FAN CYLINDER HEAD fl ney RMR PIRA FIT As ann Me COL Pt J D DISTRIBUTOR WAAN m dadaa 1 yea de r v P CYUNDER RR 0 AM BLOCK E 7 D 1 1 pon uM CARBURETOR OIL PAN GOVERNOR p aa RM 502 Fig 2 Right 3 4 Front View of Engine Valve stem clearance to push rods Intake osea mast 0 010 to 0 012 in l4 Dur I I 0 014 to 0 016 1n ValvB HEBES oot ae ae eae Su WR eee eee es pat Non adjustable 112 ACCESSORY REMOVAL In the disassembly procedures throughout this manual dis assembly is carried out only to the extent necessary for complete inspection of the parts subject to wear The replacement or repair of the individual parts thus inspected is referr
21. ee 9 1 214 9 ee 5 1 48 0190919 10A797 Welch Plug 5 49 S190111 10A766A Shifter Cap 1 Assy 5190110 10A720A Shifter Cap Assy oe d 1 Consists of items 432 ts 35 43y 45y Zo thru 52 54 thru 59 50 74174 S 74174 S Woodruff Key 405 1 ool 5190073 10A712 Selector Fork 1 ue 5192900 E201A62 Snap Ring 1 53 9190047 10A753 Rubber Grommet 1 54 5190920 10A798 Seal Shifter Cap 1 op 5190108 10A713A Selector Shaft 1 56 3523051 S MIISAS3 S Detent Ball 5 16 2 ol 5190061 1LOB139G Detent Spring 2 Page 2 TARF ARDE CAN 58 g9 60 61 G2 5190090 34806 S 20346 S 5190106 51900982 5190105 5190112 201909024 0190921 90190097 5190098 9190922 89428 5 94 90923 5190037 5190098 5190922 10A731 34806 S 203405 10A719 10A723 10A770 10A205 10A206A 10A209 10A746 10A747 10A748 89428 S 10A775 10A746 10A747 10A748 Shermanparts txt Derenr Gap sos Lockwasher 5 16 EU MS Hex Head Bolt 5 16 18 x 3 4 Shifter Cap Gasket Mounting Flange Gasket INSTALLATION TOOLS Installation Kit Consists of Parts Hole Saw Hole Saw Arbor Hole Saw Pilot Drlll Template Shimming Test Collar Allen Wrench 2 2 8 3 E ME Headless Set Screw 5 16 18 x 3 8 Installation Kit Consists of Parts Drill Template Shimming Test Collar Allen Wrench Page 3 RAC Fr Fr kB eB DN PRPRPRPRPRPE H T rf orom ic HERE S YOUR FULL RANGE OF WORKING GEARS AND PTO SPEEDS WITH THE COMBINATION IM
22. gear Replace a camshaft that has excessively 124 a 3695 47 LIT ma T CAMSHAFT 6250 CAMSHAFT GEAR 6256 CAP SCREWS 350400 RM 522 Fig 25 Camshaft Disassembled cams or worn corroded scored or discolored journals Replace a camshaft if any of the journals measure less than 1 795 inches Replace a camshaft gear that is visibly worn broken or has chipped teeth To remove the camshaft gear straighten the four tabs on the camshaft gear locking ring Remove the four cap screws and locking ring Lift the camshaft gear from the camshaft fig 25 To install the camshaft gear place it on the camshaft and install the locking ring and the four cap screws Bend the tabs on the locking ring down onto the cap screws b Valve Push Rods Clean the push rods thoroughly Replace _ ee push rods if the diameter is worn to less than 0 998 inch or 1f they VALVE SPRING RETAINER 6514 VALVE SPRING 6513 VALVE GUIDE BUSHING 6510 n Eo 70 ey vit 3 T E r MP i PUSH ROD 6500 N N NER 6512 VALVE 6505 Pbi GUIDE BUSHING RETAINE 65 P tum Fig 26 Valve Assembly Disassemt ere amp 124 b m enl 5r TL AR ak PANT RM 71 Fig 27 Disassembling Valve Assembly are scored or cracked Pressed steel type push rods may be resur faced at the bottom end only Replace any push rods that are less than 1 710 inches long after resurfacing
23. idling or when placed under load can be improved by installing the economizer jet Part No 8N 991h The installation of this jet along with proper carburetor adjustment will in most cases correct this stumbling condition See Service Bulletin 118 h When reassembling the carburetor and fastening the halves together care should be taken in tightening the screws The rear screws next to the air inlet should be securely tightened first 5 Both the 8N and the 9N carburetor are adjusted ir can In some cases it may be necessary to open the ic dw T Te FTT of the 8N carburetor as much as one and one quart adjustment needle one and one half turns to obtai Cee vel v marnce car ATTACHMENT 9 Page 2 of 2 In adjusting the 9N carburetor turn the idle adjustment needle approx imately three quarters of a turn open and the main adjustment needle one full turn open NOTE The fact that the 8N carburetor adjustment needles are opened more than those on the 9N carburetor does not necessarily mean increased fuel consumption The increased openings in the amp N carburetor are due to the difference in construction and venting of the bowl The gas oline consumption of the two carburetors should be approximately the same 6 In cases where tractor with an 8N carburetor does not operate satis factorily even after the carburetor jets have been installed and the _ carburetor properly adjusted it is recomm
24. in wheel tread 2 2 0 ce ee 2 25 Steering wheel diameter eee 18 in m Hydraulic System ho DAMMMMECC Internal Maximum pressure cse ne 1500 1700 1bs per sq 1n Pump jh 6 a3 ene cede ee eeedees oe cee hase eae Scotch yoke piston pg C Direct power take off shaft Capacity 2000 engine R P M 1 0 0 ce eee 2 85 gals per min 1500 engine R P M 0 0 00 0 0 ees 2 15 gals per min Control 0 000000 eee oreks Manual and automatic Oil SUDDIV ordered x RA de pannan Transmission and differential n Power Take off Adapter HUE Loos ee ROO EC Ue RUE dU qoe d ere 134 Speed 1500 Engine R P M 00 0 cee eee 545 R P M o Belt Pulley Pulley speed 2000 engine R P M iulseeseeese 1358 R P M Belt speed 2000 engine R P M 54 3199 ft per min Pulley size standard 00 ee rne 9 in MyTracrorForow CON 112 o 3 3730 47 Chapter 1 DESCRIPTION AND DISASSEMBLY Section Mate ek oth a du rk ua 4d er YEA HR eue NcRRd 399 SO de V RR RC 111 Accessory Removal e leen 112 Engine Disassembly llle an 113 The Ford cylinder engine figs 1 and 2 is of the L head type s zpiece Steel cylinder sleeves are used which are easily replaced when rebuilding the engine The distributor is driven directly from the front end of the camshaft 111 DATA TYPE ee ete ee ee eee
25. is found to be in excess of 0015 the val ve seats should be ground and checked again 3 Fit each piston to its respective sleeve bore using a pull scale with a 002 x amp feeler gauge as speci fied in Service Bulletin No 182 dated October 5 1951 In the major ity of cases io obtain the required fit of 5 10 pounds pull it vill be necessary to hone the sleeve bore If honing is necessary a suggested procedure is provided below a Use a rigid type hone and No 220 grit stones A drill with a capa city of 250 450 RPM should be used to drive the hone ATTACHMENT 5 NOTE The speed of the hone ang rapid ity of the stroke governs the cross hatch marks on the sleeve The cross hatch marks should intersect at approx imately 90 for proper ring seating b Operate the hone through the bore 10 or 12 complete strokes Remove the hone clean the sleeve with dry rags and recheck the piston fit a Ss c Repeat the above procedure until the necessary amount of material has been removed for the speti fied piston to bore fit CAUTION Do not use gasoline or kero sene to clean the sleeve walls after the honing operation Solvents of this type will not remove the abrasive but will further embed small abrasive par ticles into the pores of the cylinder block Diagram A shows the surface of a sleeve wall before it has been properly cleaned and after it has been cleaned by following recommended procedure 4
26. is entered in the slot in the camshaft Secure the dis tributor to the cylinder front cover with two cap screws and lock washers Secure the spark plug wire conduit to the cylinder head with the two cap screws d Install Oil Filter Secure the oil filter to the cylinder head fig 1 with the two cap screws Connect the oil filter return line to the governor and oil filter Connect the oil filter inlet line to the con nection located at the right hand side of the cylinder block and to the oil filter e Install Generator Hold the generator in place on the cylinder front cover fig 2 Install the cap screw and washer but do not tighten until the fan belt is adjusted after the engine is installed FITS AND TOLERANCES Section Definition of Fits esee Rh 141 Fits and Tolerances cesse m RR hn a 142 Torque Wrench Readings 000000 cee ee ee 143 41 DEFINITION OF FITS The Table of Fits and Tolerances Sec 142 gives the original clearance established between various parts at the time of manu facture as well as wear and limit clearances that indicate to what point the clearance may increase before the parts must be replaced These clearances are based on the parts involved all being at 70 F The following definitions of the various types of fits are given to assist in arriving at the correct amount of clearance between parts not included in section 142 as well as to give a better ap
27. lbs equipped with 10 x 28 rear and 4 00 x 19 front tires It featured Ford s own four cylinder L head engine with 3 3 16 inch by 3 3 4 inch bore and stroke rated at 1750 RPM It had a four speed transmission ranging from 3 2 MPH to 11 9 MPH The horsepower rating on the drawbar was 17 6 and 23 2 HP on the belt x Ford was not only selling a popular tractor but a different way of farming which the farmers were anxious to adopt By 1949 the sales of small tractors were beginning to decline and larger tractors were in demand Printed by Jensas ME PROPAS PETS N kept the company as the second largest manu MvTracrorForum com CONTENTS Description and Specifications ee e III 3 Chapter 1 Engine e eeclaeeeeeeceehe hh tIHhhuh nnn Chapter 2 Transmission ccce rh IIa eee 61 Chapter 3 Power Take Off ccc cuss cence tenner rh RII IIIIIimimrg 7 Chapter 4 Belt Pulley l creer hh hh Ih 75 Chapter 5 Rear Axle lecce eer rh Ihr nn 79 Chapter 6 Hydraulic System e err I III 89 Chapter 7 Steering Gear 2 cc caen erra htm tne 101 Chapter 8 Service Bulletins err II III 111 DESCRIPTION AND SPECIFICATIONS Section Description 2 0000 ee ehh hh 111 Specification8 cies 112 111 DESCRIPTION The Model 8N Ford tractor is provided with a steering gear assem bly of the automotive ball nut
28. light will improve the efficiency of the dealer s service department by assuring accurate timing the first time This will reduce your desler s service expense by speeding up the initial operation and eliminating the need for repeat Service calls Bulletin Subject Distributor Shaft 8N 12175 as Supplied in Parts Stock The subject shafts are supplied as service parts without the holes drilled in them to pin the collar and gear to the shaft in production these holes are drilled after the shaft has been installed in the distributor assembly so as to obtain the proper end play of the shaft in order to obtain this same clearance with the use of service parts the following procedure is to be followed in the field Le Install the shaft in the distributor housing 2 Puta 002 to 005 shim or feeler at the bottom i py p 4 This will provid yd Lit CTORF ORUN cor before slipping the collar on amount of end play 3 Drill the first hole to hold the collar in this position and rivet it in place lh Remove the shim or feeler 5 Place the gear Part No TRA 12390 C on the shaft and remove the clamp and arm assembly Part No 7HA 12273 which is clamped against the shoulder on the distributor housing Measure from this shoulder down 4 020 inches on the shaft and locate the bottom edge of the gear at this point This properly locates the gear and the hole may now be driiled in line with the holes in the gear and the gea
29. missing 1 AXLE SHAFT BEARING REPLACEMENT Remove the axle shaft bearing with a puller that applies pressure on the inner race fig 42 To install the bearing press it on the shaft making sure ali pressure is applied to the inner race fig 43 gene imd a a If BEARING WEDGE BEARING fem AXLE SHAFT t dee diim dimmi abs la u i is pei uai n fhe ea mmm AE iare ital vd ARMS Fro pee arripere pamm p pem arma pm CAN Fig 42 Removing Axle Shaft 152 d 1 2730n 47T that secure the pinion to the housing Place the thrust washer and differential side gear in the drive gear assembly Install the four differential spider pinion gears and thrust washers on the differential spider and place the spider including the gears in position on the drive gear assembly Install the thrust washer and differential side gear in the differential gear case Line up the match ing numbers on the drive gear assembly and differential gear case so that the numbers are directly opposite each other Place the two assemblies together Instal the eight bolts that secure the two assemblies together and tighten them evenly Lock the eight bolts with locking wire Be sure that the differential side bearings are thoroughly clean and apply a thin coating of grease on the bearings Place a new gasket on the right hand side of the center housing Position the right hand axle housing on the center housing Install and tighten
30. no gaskets see below Remove the end shaft seal cork gasket on the axle shaft up against the bearing it s the diameter of the axle and about 12 long p n 4294 Finally remove 2 bolts holding the bearing retainer Remove the shim pak backing plate and gasket but leave the axle and bearing on the tractor Assembly You will want to make sure all of the joints that are exposed to oil have gaskets and are sealed properly used Permatex silicone sealant on both sides of every gasket and shim Clean all shims and clean or replace gaskets Check that the shim pak is adjusted properly believe this adjustment insures the axle spins in the center thus is important to proper seal function Please verify this procedure Dry install the gasket backing plate gasket shim s gasket and bearing retainer Remove shims until both axle shafts spin the same direction when the opposite wheel is rotated Walid Le transmission in gear Add just enough shims so that the axle shafts spin in opposite directions when the wheel is rotated Hemove the above and clean dry and re pack the bearing with grease Using a gasket sealer carefully seal both sides of each gasket and of each shim and install the bearing retainer using the 2 rear bolts The parts sequence from the axle housing is Gasket 4130 gt Baking Plate gt Gasket 4130 gt Shim s 4229 gt Gasket 4130 gt Bearing Retainer gt Gasket 4130 Brake Support gt Gasket 413
31. pin out of the piston Scrape the carbon from the piston ring grooves and also from the top of the pistons Clean all carbon and sludge from the oil holes in the oil ring groove Make sure all of the oil holes in the connecting rod are open Clean all parts thoroughly INSERT BEARINGS 6211 LOCK NUTS yee PISTON PIN RETAINER 6140 ht PISTON PIN 6135 NA MO PISTON RINGS PISTON PIN RETAINER 6140 S RM 513 CONNECTING ROD 6200 f Willard LHe Fig 17 Connecting Rod and Piston Assembly BEEN amp 123 Fig 18 Fitting Piston to Cylinder Bore a Inspection NOTE Usually the type of wear or the condition of one of the reciprocating parts can indicate a fault in other recipro cating parts i e a bent connecting rod could result in unusual wear on either or both the piston or the connecting rod bearing 1 PISTONS Discard pistons which are cracked scored dam aged or have burned spots a FITTING Pistons To check the clearance of a piston in a cylinder bore use a thickness gauge 14 inch wide and long enough to cover the entire length of a piston and attach it to a tension scale Place the gauge on the side of the piston bore and push the piston in the cylinder so that the side of the piston which is 90 degrees right angle from the piston pin hole is against the thickness gauge Withdraw the gauge and observe the reading on the tension scale fig 18 The thicknes
32. pow Gono action on almon any belle jah 7j gow ma bell word gau cca Die MiyTractorF ORUN CON Comitini Chapter 3 POWER TAKE OFF Section Disassembly aaura nauau oe ee ee ee ee 161 Inspection and Repair 0 0 0 0 00000 Fthtoaeeren LOC Assembly eee ee TTE 163 1601 DISASSEMBLY The disassembled power take off assembly is shown in fig 48 a Power Take off Adapter To disassemble the power take off adapter remove the three cap screws which secure the shield and bearing cap fig 44 to the housing Remove the shield and bearing cap from the housing Drive the bearing and shaft assembly out of the housing Grind the head off the rivet that secures the sleeve to the shaft Remove the rivet from the shaft and sleeve Pull the sleeve off the shaft Remove the oil seal from the housing SHIELD I SPLINED SHAFT ve nu HL res E 1 SPUNED SHAFT OM AAT ak Fig 44 Power Take off Adapter ATI l6l a TractorForom cor Bearing Wedge POWER TAKE OFF ADAPTOR SHAFT BEARING d RM 657 n Fig 45 Separating Power Take off Adapter Shaft Bearings b Power Take off Shaft Remove the snap ring from the rear of the bearing Press the shaft and bearing assembly from the power take off cover Press the dust and oil seal out of the power takc off cover sg 48 162 INSPECTION AND REPAIR Clean all
33. retainer over the power take off shift shaft and sliding the shims in or out If it has been necessary to replace any of the transmission gears a careful check should be made to make sure that all gears mesh prop erly Install the power take off shaft in the power take off shift assembly Engage the power take off shaft with the transmission Position the transmission in neutral and measure the torque required to turn the power take off shaft With the shaft turning uniformly the torque should be from 30 to 60 pounds inches If more than 60 pounds inches of torque are required to turn the shaft one or more of the gears are binding at the teeth or on the hub shoulders Deter mine which gear is binding and replace it Position the shift plates in the housing and install the shift plate cap screws Install the upper shift fork and shift rail positioning the deep square corner slot in the rail toward the opening in the shift plates Install the interlock ball and spring in the hole at the top of the housing Using a new gasket install the transmission cover MvTracrorF orom com amp 1 247 f r Sean AUT CF C 5 r Md QSIMJ 23 SPD TRANSMISSION The transmission is the selective sliding gear type and all moving parts with the exception of the re verse idler gear which rotates on a bronze bushing are carried on tapered roller bearings Three forward speeds and one reverse are provided and are en gaged by means of a gearsh
34. shaft bearing retainer assembly being sure that the metal shim pack is carefully identified as a unit This will facili tate adjustment after assembly Remove the main shaft gear cluster as a unit This should be accomplished slowly so as to avoid damaging the gear teeth Remove the two lower shift rails by removing the interlock screw plug spring and ball from each side of the housing Loosen the nuts on the shift forks and turn out the screw until the shafts are free to slide on the forks Slide the shift rails out of the rear of the housing Remove the power take off shift assembly Keep the metal shim pack carefully identified as a unit This will facilitate adjustment after assembly Remove the countershaft gear cluster as a unit Be careful not to damage the gear teeth Remove the reverse idler assembly Tap the MrT FETTE du CAM shaft to remove it and the horseshoe type retain JAA Smam 3730 47J 131 a BEARING RETAINER 7085 BEARING CUP 7067 SHIMS 7135 THRUST WASHER 7071 A MAIN SHAFT 7061 3RD GEAR 7102 2ND GEAR 7101 ATH GEAR 7110 THRUST WASHER 7071 B MAIN DRIVE GEAR 7017 A BEARING 7066 on MAIN SHAFT SPRING 7562 BEARING 7066 ue Jp 1ST GEAR 7100 C OUPLING 7108 SLIDING COUPLING 7106 GASKET 7086 iL SEAL 7052 HUB 7561 SPRING 7562 MAIN DRIVE GEAR BEARING RETAINER 7050 CLUTCH RELEASE BEARING 7580 RM 613 Fig 1I
35. the pinion fig 42 152 INSPECTION AND REPAIR Clean all parts thoroughly in cleaning fluid and blow them dry Discard all used gaskets and oil seals a Axle Housing Replace the axle housing and the center e if they are cracked or bent Replace the differential bearing cups at the inner end of the axle housings if they are pitted corroded or discolored due to overheating subpar 1 below Replace the thrust block on the left hand axle housing if it shows wear Replace the drive pinion pilot bearing in the center housing if the rollers have any flat spots are discolored due to overheating are pitted or if they bind when rotated by hand subpar 3 below 1 DIFFERENTIAL BEARING CUP REPLACEMENT To remove the differential bearing cups from eith r the right or left hand axle housing use a puller that hooks behind the bearing cup To install the bearing cup in either the r ing use a replacer that pulls the beari MyTracrorF orom com draw the cup in flush with the shoulder a Ammnm ll ee ie A REMOVING DRIVE PINION B INSTALLING DRIVE PINION dba CENTER HOUSING Ww WW RU n mM 17 Fig 36 Removing Drive Pinion Assembly 2 THRUST BLOCK REPLACEMENT To remove the thrust block remove the two cap screws which secure the thrust block to the axle housing and remove the block To install position the block in place on the housing and install the two lock washers and cap Screws 3 DRIVE PI
36. to be certain that parts have not been nicked in handling hl Turn the engine until the valve is lifted and check freedom by turning tho valve head SERVICING The valve assembly should improve valve life so that under normal conditions they do not need to be checked until the engine is ready for overhaul Normally the greatest wear will occur on the portion of the key that contacts the valve groove face If this is excessive the keys should be discarded p 3 en ERES Before reinstalling check clearance by assembling retainer keys and cap to valve Hold retainer and press on cap Rotate valve while pressing parts together The valve should turn freely If binding occurs it may be due to nicks dirt or cap too shallow To correct for shallow cap efther use new cap or grind valve tip face If valve is free check clearance by inserting small piece of shim stock OOL thick between valve tip face and cap Press parts together If valve does not bind clearance is too great and should be reduced by polish ing the cap open end against a piece of fine emery cloth Recheck clearance and rework cap until not more than OOh shim stock is required to bind valve MeTRAacronFoRUMcoK ATTACHMEN INSTRUCTIONS n REAR HOLE OF TAPPET PROTRUDING LIP 8N 17045 A d ea RIGHT HAND To adjust a tappet proceed as follows 1 Insert the protruding lip of the wrench into the rear hole of the tappet being adjusted 2 Pla
37. toward replacing liners unnecessarily In view of the fact that replaced liners are subject to recall for inspection pending approval of claims you are urged to make certain that in accordance with the above four factors the liners are defective and actually need to be replaced E i Bulletin Subject Tractor Changes Use for Effective Point of Change Only Effective with Tractor Serial No 318023 the intake valve seat insert Part No 40 6057 B has been removed from the Block Assembly Part No ON 6010 B and the Cylinder Assembly Part No 8N 6011 B The seat is now integral with the block Extensive testing has proven that elimination of this intake valve seat insert will in no way affect the normal life of the engine block Occasionally you may find an intake valve seat insert used in a new tractor engine or service engine block however this will be an exception and should not be cause for concern in the field Valve seat insert Part No lO 6057 B will continue to be sold as a service item and can be used to reconditi n engine blocks in the field where it is found to be necessary P Manufacturers of the various types of seat grinding equipment provide detailed instructions for all steps in reconditioning valve seats on both the cast and insert type and these instructions should be followed YTRACTORF ORUM COM Bulletin Subject Wrenches for Adjustable Tappets The recently announced tappet wrenches Part No 8N
38. tracer Tape or cut bota er of original fye ts eutout 23 fon it armatur wir 141 Ao B ATTACHMENT 9 Pare l of 2 IDENTIFICATION AND SERVICING OF CARBURETORS ON 8N FORD TRACTORS Starting with Tractor Serial No 8N 313112 a modified 8N carburetor became standard in production Ihe following cross reference between the part numbers assigned and the part numbers used by the Marvel Schebler Corporation will provide identification of all carburetors used on the 8N Ford Tractor Part No Marvel Schebler Fart No Type Carburetor 9N 251D TSX 33 9N carburetor used on tractors prior pon to Serial No 260596 8N 9510 TSX 2h41 8N carburetor used on tractors between Serial Nos 260596 and 276115 without economizer jet GN 9510 TSX 211A 8N carburetor used on tractors between Serial Nos 276115 and 313112 with economizer jet 8N 0510 TSX 2h1B 8N carburetor used starting with Serial No 313112 modified NOTE The Marvel Schebler part number will be found on the boss located on the right hand side of the carburetor body HMM The steps listed below are provided for guidance as an aid in the correction of complaints of unsatisfactory performance that may be encountered l Check the timing of the distributor as outlined in Service Bulletin 115 2 Disassemble the carburetor and clean it thoroughly 3 The operation of tractors equipped with the TSX 2 1 carburetor in which the engine tends to stumble either while
39. use of one or more in combination it is possible td get the cerrect adjustment of the heavy 1 DUM 4 r s PLI EL h wb Fig 92 Removing Main Shaft and Countershaft duty tapered roller bearings on the transmission shafts Noisy transmissions are sometimes due to in correct adjustment of the tr rismission shaft bear ings and a great deal of care should be taken when overhauling a transmission to make sure that the correct number of shims are placed behind the bear ing caps to make a good snug fit yet the shafts should turn easily by hand The chief cause of noisy transmissions is damaged teeth on one or more of the gears Damage can be caused by clashing the gears when shifting or by foreign material entering the gears when they are in mesh Sometimes the slightest indentation of 2 gear will cause a distinct noise These damaged teeth however can be smoothed up quite easily by passing a piece of grinding stone back and forth over the damaged place smoothing it to conform with the rest of the undamaged teeth Do not throw away gear until you have made a thorough try at smoothing up the teeth The next step in disassembling the transmission is to remove the low and high sliding gears Part 7100 Remove second and reverse sliding gear Part 7101 Remove main drive gear Part 7017 Figure 89 Use great care in replacing this gear to prevent damaging the oil seal Part 7
40. 0 gt gt Seal Retainer gt End Shaft Seal 4294 gt Hub gt Washer gt Nut gt Retainer Finish up by installing sealer and gaskets up to the hub seal Attach the axle seal using the 2 support bolts and finally the 4 stud bolts and nuts Install the brake shoes and slip a new cork end seal up against the bearing put Permatex sealer on the splines before slipped the hub on the axle Attach the hub and tighten the end nut The specification is between 400 and 500 ft Ibs Being cautious snugged the nut and did a final torque after the wheel was on Next install the brake drum and adjust the brakes Carefully re install the rear wheel If you do this right and with a little thought and common sense your axles should not leak MyTractorF orom com Chapter 9 REAR AXLE Section Disassembly 0 0 annaa aaaea aaa eee sli 151 Inspection and Repair 000000 Lll eese 152 Assembly eeee ess Tm 153 151 DISASSEMBLY To disassemble the axle remove the axle shaft nut lock ring and remove the axle shaft nut flat washer and seal fig 34 Remove the hub from the axle shaft fig 33 Remove the cap screws and nuts that secure the brake support plate to the axle shaft housing and remove the brake support plate assembly Remove the oil seal retainer from the bearing retainer fig 34 Repeat this procedure to remove the other brake support plate Remove the brake dust shield as
41. 0 R H fee a 4011 LH BACKING PLATE 2224 i SEAL 425 4 E PR CUP BRAKE SUPPORT PLATE 2255 I r j F m pm p aw Wy taf Fi a Ai Pun DK E ete rug PEN IMS LO DETI E ri f Ae UEA im DE EATA idy P I PT LIU 1 HUB 1117 SHIMS 4229 r Wy BEARING d p SEAL RETAINER NUT 4179 PFTAINEP 4157 E3 BEARING 4221 AXLE SHART 4235 7 GASKET 4130 Hei Fig 34 Backing Plate and Hul 151 2930 47T THRUST WASHER 4228 DIFFERENTIAL GEAR DIFFERENTIAL SIDE GEAR 4256 CASE ASSEMBLY 4205 DIFFERENTIAL SPIDER GEARS 4215 TER THRUST WASHERS 4230 DIFFERENTIAL SIDE GEAR 4236 THRUST WASHER 4228 DIFFERENTIAL GEAR CASE ASSEMBLY 4206 A AX RING GEAR DIFFERENTIAL 4210 BEARING 4221 THRUST WASHERS 4230 DIFFERENTIAL SPIDER GEARS 4215 Se DIFFERENTIAL SPIDER 4211 DIFFERENTIAL BEARING CUP 4222 BOLTS cn DIFFERENTIAL BEARING 4221 DIFFERENTIAL BEARING CUP 4222 RM 616 Fig 35 Differential Assembly Disassembled Remove the six cap screws that secure the drive pinion sleeve to the center housing Install the puller as shown in fig 36 and remove the pinion assembly Place the pinion assembly in a vise equipped with brass jaws Bend the ears of the lock washer off the pinion bearing lock nut Using two thin 2L inch open end wrenches remove the pinion sleeve thrust washer and roller bearing from
42. 052 Remove power take off shaft bearing support Part 718 Remove power take off clutch hub Part 716 Remove countershaft gear assembly The gear is Part 7113 and the shaft is Part 7111 Remove reverse idler gear retaining pin Part 7155 and when replacing the reverse idler gear Part 7141 make sure that the beveled part of the gear is toward the rear end of the fractor Push reverse from the rear of eoU c TRANSMISSION md OOBB B BMBMHM MHM MH R MHMHM MHM HM R RM a O r a UU Place the transmission main drive gear bearing retainer Part 7050 in a vise and pull the oil seal Part 7052 using a special puller When replacing this oil seal make sure that the lip of the seal is toward the rear of the tractor Inspect the bearing cups of the retainers Parts 7134 7085 and 718 If they show damage remove and replace REASSEMBLING TRANSMISSION The transmission is reassembled in reverse order Particular attention must be given to the installa tion of the bearing caps to make sure that the cor rect amount of shims are used and that the cap screws are tightened gradually and equally This will insure proper alignment of the bearings and insure all surfacesof the cap bearing equally on the transmission case The clutch release throw out bearing Part 7580 is a prelubricated bearing and shou
43. 1s damaged in any way A discolored ball is due to a chemical reaction and does not effect the serviceability of a ball 6 UPPER RACE Replace the upper race fig 37 if it is grooved or pitted d 7 THRUST WASHER Replace the thrust washer fig 37 if any of the balls are missing or if any of the balls have flat spots 8 FORK BASE Replace the fork base fig 36 if it is worn or damaged 9 BODY Replace the body fig 36 if it is cracked or if the trunnion for the manual lever measures less than 0 916 ich Replace the bushing par c below fig 37 if there is more than 0 005 inch clearance between the shaft and bushing Replace the needle bearing if any of the needles are flat or if any are mis r the grease seal if the shaft has been removed Ei bearing surface is worn flat amp 19970 of tQ a2 amp QE5 47 MvTracrorForom com RM 634 Fig 40 Removing Governor Fig 41 Installing Governor Bushing Bushing b Repair To replace the drive gear or ball bearing base remove the drive gear from the shaft with a puller Remove the ball bearing base and lower race from the shaft as an assembly Press the lower race out of the ball bearing base To assemble the shaft press the lower race assembly in the ball bearing base Install the ball bearing base assembly on the short end of the shaft fig 37 Press the gear a on the shaft until the shaft is flush with the face of the gear TU ocvoooc To re
44. 3170l5 Right Hand and Part No 8N 170Lh6 A Left Hand are designed to prevent tappets from turning while making the necessary tsppet adjustments See Attachment 2 for instructions The price structure for the subject wrenches has been released in Service Parts Release and Change Notice 51 5 dated May 1 1951 and is currently in your hands Bulletin Subject Ford Tractor Head Bolt Torque Specifications The use of the recommended head bolt torque 1s essential in the proper ine stallation of the cylinder head Improperly tightened head bolts could result in damage to the engine such as warpage of the cylinder heid water leakage and cylinder heed gasket failure The torque specifications and correct pro cadure for tightening head bolts are covered in detail in Attachment 3 Bulletin Subject 8N Ford Tractor Engine Overhauls on the 8N Ford Tractor engine must be done carefully and properly if m amp ximum performance in engine life is to be expected and customers satisfied In this connection the importance of properly fitting pistons piston rings piston pins connecting rods and bearings cannot be over emphasized Complete instructions have been furnished to you for the dealers Service Departments in the Ford Tractor Repair Manual Form No 3695 l7 and by various bulletins from the Dearborn Service Department However we find that these instructions are not being c rried out in many service shops It is possible that the mechanics do
45. 35 10A134 Taper Bearing Cup 1 2 co lee ONO B115A3 Magnetic Drain ad 1 S 9190063 10A701 Gear Case L Assy 10A710 Gear Case eey sa arag 1 Consists of Items 1 3 amp 42 4 5190066 10A705 Drive Gear 1 Assy 5190089 10A730 Drive Gear amp Searing Resse T Consists of Items 4 5 amp 6 s 5190062 10A15 7 Oil Slinger f 1 6 5190044 10A177 Taper Bearing Cone 1 T 3190077 10A717 Thrust Washer S D Goat B 8 5190080 10A721 Thrust Washer Cluster Gear 1 9 5190085 10A726 Step Down Gear Tu 1 10 5190093 10A737 Roller Bearing Cluster Gear 2 11 5190069 I0ATO0J7 Cluster Gear L LZ 5190094 10A754 Bearing Spacer 1 T3 5190046 10A741 Thrust Washer Cluster Shaft 1 Page 1 RACT onF ornk CON Shermanparts txt 14 5190069 104708 Cluster Shaft i x ud uw ld E ee 1 L5 0 490259 304686 5 Bolt Hex 7716 14 x I Kat or 20 4 16 34808 S 34808 S Lockwasher 7 16n 8 17 5190094 10A738 Shift Collar Rear 1 18 5190087 10A728 Spline Sleeve Long 1 l9 9190067 10A706 Step Up Gear is 1 20 5190059 I0ATA9 Spline Sleeve Short 1 21 5190086 104727 Shift Collar Front 1 a 9192694 E201A112 Snap Ring Drive Gear L 2 5190091 10A752 Thrust Washer 1 24 5190092 10A736 Roller Bearing Nl i 25 5190933 10A906 Cluteh Shaft For Model 519 155 or 41201 1 Assy 5d 90 A 10A905 Clutch Shaft Assy For Model 519 155 or 1201 1 Consists of Items 24 25 27 28 26 5190065 10A704 Clutch Shaft For Model 519 3 or 10A700B 1 Assy 5190100 10A755 Clutch Shaft Ass
46. 48 pri ing Remove the four cap screws that secure the steering tube to the steering gear housing Lift the tube and shaft assembly fig 1 from the housing CAUTION When the steering gear is partially or completely disassembled the ball nut assembly must not be permitted to turn so that it reaches the end of the worm on the steering shaft as this action may damage the ball retainer Remove the three screws and clamp from the ball nut assembly fig 2 Lift the two ball retainers from the assembly and remove the ball bearings 123 INSPECTION AND REPAIR Before inspection clean all parts thoroughly in cleaning fluid and blow them dry with compressed air A Inspection Inspection of the steering gear must cover the fol ges seven items ome C1 STEERING TUBE Replace the steering tube fig 2 if it is bent or otherwise damaged Replace the bearing race if it is scored or pitted If the bearing at the top of the steering tube is damaged it must be replaced 2 ROLLER BEARINGS Replace a roller bearing if any of the rollers have fiat spots or if any of the rollers are missing 3 STEERING TUBE SHAFT AND BALL NUT The indi vidual parts of the steering shaft and ball nut must be inspected to determine the condition of the assembly a STEERING TUBE SHAFT Replace the LL p i ball nut assembly if the worm on the sh AT CTORF ORON CN damaged 123 a 3 a aUa AUT STEERING SHAFTL 3524 COVER AN
47. 97 I a IG j mum Dmu m Bawa lial iG s bhe 133 430 pt Sincdmrdl Hawaerus i53 a3 Ta ndn 1 35 E iJa un E15 irap Lp Beveras 3 K7 zii 4a br ri J ALEL ceed FIO apd Pa PT aw Ful Mhratiis bpd ihacws moe ob deb eq aa x TIET AF ubhuh jo wall mha Pus atmi cump b the jaar Begina ign ee lasw imb EDO guia jb fe pe Dave PTD ie sie edie a S24 a 344 EFM PTO DPERATED HARVESTING MACHINERY Ever all hes working a l Itkopneracesi coro picker Cousb ne or other bhurveszer 1 s a rval jnb anlosding the meching t grt opor anne agian Wich the Caombirarnir bn vin tact You ran operzte ar full thronke acd still bave tee ASAE standard INi speed anal ihe tight grein apes Exrra poseer die oo ipztenen engine sperd at bower peor ration ders pana burrat hra vy crop wir suse When BOWE VO can d s ben llp standard cr Step Dawn Choe the gear thet bre firi coodinions on the sok Uf gou operate PTO feats ges weet Lhe eed mu ahha Ps Bhat BELT WORK Abenlure flexibility m Yu amy with she Caomhi nanon lJhooar any PIG sper pou wan irum 246 du 1231 farm bred gint tative Sis Coke pour chance ol piren grets p u ASAE standard PIC spem 4 Pull throne rrandmrd ar one half ch one third throanbe i1 vx reathe Serpel p at Hi like Vei Cah um nn wvifaitdimesgulley 0 305 pena hele grijp amd secure mor ji moguentum Ship gu secure normal engine speed amd perfect
48. BLING THE BENDIX Step 1 Remove the lock spring I Figure 2 Step 2 Hemove the starter spring anchor plate H Figure 2 Step 3 Remove the bendix spring G Figure 2 Step 4 Remove the spring clip F Figure 2 and the starter spring anchor plate D Fig ure 2 Step 5 Remove the pin E Figure 2 that se cures the bendix assembly to the shaft Step 6 Remove the screw and shaft assembly C Figure 2 Fig 2 Step 7 Remove the starter drive meshing spring B Figure 2 Step Remove the pinion and barrel assembly A Figure 2 Vi ASSEMBLING THE BENDIX Reverse the procedure in Steps 1 through 8 Part V of this Job Plan VIL INSTALLING THE STARTER ON THE TRACTOR Step l Position the starter assembly on the tractor engine Step 2 Tighten the two bolts that secure the starter to the engine Step 3 Connect the electrical leads NOTE At conclusion of Job 19 a Remove the engine lift plate Check the spark plug gaps and install spark plugs Install the wiring harness Install the battery box and air cleaner Install the tool box Install the battery and battery box cover Install the fan Install the radiator 1 Inst i p a amp oe YTRacTORF ORDE car Chapter 2 TRANSMISSION Section Disassembly cese ehh mh hh etr 131 Inspection and Repair 00 2 cee eee n e n t nt tnn 132 Assembly iius nre trema aea th horror os 133
49. Clean the cylinder block of all for eign material as follows a Wipe or remove as much of the abra sive material us possible b Swab each sleeve wall valve port and chamber with clean SAE 10 Motor Oil at least twice C Wipe the oil out of the sleeves with clean rags d Wash the sleeve bores and valve chambers with hot soapy water e Flush water jackets to remove for eign material which might cause excessive wear to the water pump f Remove the rags from the crank shaft and wash the crankshaft off with hot soapy water B Dry the cylinder block throughly Using compressed air gt Reassemble the engine RACTORE ORUM COM Installation Instructions for Oversize Piston and Ring Sets ATTACHMENT 6 Page lof 2 1 The following procedure is necessary prior to reboring and honing the cast iron sleeve part no Be ON 6055 B to fit oversize piston and ring assemblies Determine which oversize piston assembly is required by measuring the dia meter of the cylinder bore at its largest diameter top of ring travel by using an inside micrometer or telescope gauge and outside micrometer 2 Install a cylinder boring machine on the cylinder block a Cover the erankshaft with an oii soaked cloth Set the diameter of the cutting tool so that the cylinder bore will be O02 undersize to allow for honing the bore for the specified piston fit The following are part numbers and mean diamete
50. Combination Thickness Gauge _ Pull Halic ee FITTING PISTON TO CYLINDER BORE New Sleeve New Piston Q02 x 1 2 in 5 10 New Sleeve Worn Piston 003 x 1 2 in 5 10 Worn Sleeve New Piston 003 X 1 2 in 5 19 Worn Sleeve Worn Piston 004 X 1 2 in 5 10 PISTON THICKNESS GAUGE RING GROOVE WIDTH Check the width of the ring grooves With new piston rings andathickness gauge every 120 around the circumference of piston in accordance with the following specifications Side Wear Clearance Limit Top Compression Rings 0015 003 004 ad Heil Second Compression Rings 001 0025 0035 CHECKING RINC Oil Control Ring 0015 003 004 PISTON PIN CHECKING CONNECTING ROD FOR BEND ROD ALIGNMENT AND PISTON PIN FITS Check the connecting rod for alignment Bent Y twisted rods must be aligned within 0 0013 at 2ach end of the piston pin when the pin is centered in the connecting rod These measurements are taken on a standard connecting rod aligner at A and B for bend and at C and D for twist The correct Tit f r a piston pin in the connec ting rod bushing exists when the pin tobeused wil pass slowly through the bushing by its own weight when pin and bushing are dry If bushing is exces Sively worn drive it from the connecting rod with a suitable driver Press a new bushing into the rod Drili the two oil holes in the bushing to the Same sizes the holes in the rod Ream and burnish or hone the bushing to 0 7505 inch
51. D TUBE ASSEMBLY 3509 SECTOR SHAFT HOUSING AND BUSHINCG 3584 SECTOR SHAFT me 4 jn Pur COVER AND BUSHING ASSEMBLY 3584 mn GASKET 3581 COVER AND TUB ASSEMBLY 3509 E WASHER 3579 PITMAN ARM f iii RM 610 Fig 3 Sector Shafts Disassembled b BALL Nut Replace the entire steering shaft and ball nut assembly if the teeth are worn or if the ball race is pitted c BALL BEARINGS Replace the entire steering shaft and ball nut assembly if any balls are worn chipped or pitted Be sure that there are 60 balls within the assembly Since these balls are held to a very close tolerance it 1s not advisable to replace them individually d BALL RETAINERS Replace the retainers if they are bent damaged or will not permit free passage of the balls 4 STEERING GEAR HOUSING Replace the steering gear housing fig 3 if it is cracked or otherwise damaged Replace the lower steering shaft bearing race if it is scored or pitted 5 PITMAN ARM Replace a pitman arm fig 3 that has been damaged in any way 6 SECTOR SHAFT HOUSING Replace the housing if it is damaged Replace the sector shaft bushings if they are damaged or worn 7 SECTOR SHAFT Replace a sector shaft fig 3 if the teeth or bearing surface are excessively worn b Repair To replace a bearing race remove it from the housing or steering tube shaft with a puller To install a bearing race press it in place making sure
52. E GEAR SHIFT PLATE 7216 bx SECOND AND FOURTH GEAR SHIFT PLATE 7225 ff 7245 SECOND AND REVERSE SHIFT FORK 7231 il r NUT 33911 9 T AN SECOND AND FOURTH SHIFT hn SECOND AND FOURTH GEAR SHIFT FORK 7236 RM 615 Fig 16 Shift Rails and Shift Forks one 0 005 inch shim will increase the torque approximately 10 pounds inches Adding a 0 005 inch shim will decrease the torque a like amount Install the two lower shift rails and shift forks making sure that the deep square cornered slots face inward on both rails Install the inter lock ball spring and nut on each side of the housing Install the main shaft assembly being careful not to damage the gear teeth Install the rear main shaft bearing retainer assembly using the metal shim pack previously removed and identified Install the main drive gear bear ing retainer assembly and gasket Position all shift rails and forks in the neutral position and measure the torque required to turn the main shaft Several turns should be completed thar ths hanniman miti he properly seated After the shift is turr dw WT CTARF aene CAN should be from 20 to 35 pounds inches 3730 47 133 f HL D O Em M required to obtain this torque reading Removing one 0 005 inch shim wil increase the torque approximately 10 pounds inches Adding a 0 005 inch shim will decrease the torque a like amount Main shaft shims can be changed by supporting the rear main shaft bearing
53. FORD _FORD Service Manual NEWHOLLAND E Tractors ON 2N and 8N t3 E M E s Ys AD OBUEECTHRLER LN ERU a N B sm cdm m n n A Ciera nar mn In a dua LE EE eet C Mu 1 DAR QM A TT a r AAT CON FORD 9N 2N 8N The Ford 9N had its beginnings with a hand shake agreement between Henry Ford and Harry Ferguson Harry Ferguson an Englishman had worked with a system of implement attachment and hydraulic controls The design work had been conducted for almost 20 years and resulted in the 3 point linkage or hitch It soon became apparent that a new tractor would be necessary to incorporate the Ferguson system Henry Ford met with Harry Ferguson and a gentlemen s agreement reached whereby Ford would use the Ferguson system in the manufacture of the new tractor Ford Motor Company had the resources of capital and factories to undertake volume production of a Ford Ferguson system tractor Harry Ferguson began to form a company to market the tractors and the implements designed to fit the 3 point hitch This agreement according to records was not witnessed or recorded as to the terms and conditions A few years later this was to be a legal problem that would require lawyers and experts to untangle and settle The new tractor was the 9N It was known as a Ford tractor with Ferguson system The tractor was demonstrated at the Ford farm at Dearborn Mi in June 1939 The tractor had
54. IVE PINION BEARING SLEEVE Puller Man BEARING CUP RM 652 Fig 40 Removing Drive Pinion Bearing Outer Race 1 DRIVE PINION BEARING CUP REPLACEMENT Place the drive pinion sleeve in a vise and using a puller that hooks behind the bearing cup pull the bearing cup fig 40 Repeat this operation to remove the other cup To install new bearing cups place the pinion sleeve in a vise Place the cups in position on the pinion sleeve and using a replacer that contacts the bearing cups evenly draw the cups in the sleeve until they are seated flush with the shoulder in the sleeve 2 DRIVE PINION BEARING REPLACEMENT Remove the beanng from the pinion using a puller that applies pressure to the inner race Install a new bearing using a puller that applies pres sure to the inner race of the bearing 3 DRIVE PINION PILOT BEARING INNER RACE RE PLACEMENT Remove the lock ring using a sharp punch Place the drive pinion so that the race rests on a solid base and with a two pound hammer strike repeated blows along the race surface This wil cause the race to expand slightly Drive a sharp chisel between the rear edge of the race and the pinion shoulder to start the race Drive the race off the pinion using a heavy punch To install anew race place it on the pinion with re pinion Press the race on the pinion un A LT CTOR Forw L the pinion Install the lock ring amp JEJ a 25 374397 7 Y that s
55. Install and tighten the four lock washers and cap screws Secure the pulley to the pulley shaft with four cap Screws and lock washers Insert the power take off shaft in the splines Install a torque indicator on the shaft and turn the shaft with the indicator The reading should be 15 to 34 pounds inches Gaskets are supplied in thicknesses ranging from 0 012 to 0 023 inch Install a thicker gasket to decrease the torque reading or a thinner gasket to increase the reading i MvTracrorF orom cor 173 3730 47J N Series Rear Axle and Brake Overhaul After months of driving my tractor with no brakes watching board postings and researching the archives got the courage to fix them Here is the procedure followed Things seem to be working for now at least oafety check archives Rear tires are generally filled with ballast remove them using extreme care On a level surface removed 5 and slightly loosened the remaining 3 lug nuts then raised the rear of the tractor until its weight was on the floor jack Then carefully walk the rear wheel from the hub roll it to the front of the tractor and rest it over the front wheel Now set the rear of the tractor firmly on the safety stand or adequate timber support Proper tools 94 socket set with 2 socket and cheater bar 30 to 36 Axle Puller that attaches to lug nuts in 3 places Floor Jack Good Safety Stand 3 6 x6 x24 wood timbers oafety Glasses
56. LY OF ENGINE Section Assembly Cnr 31 Installation of Accessories see rns 132 131 ASSEMBLY Before assembling the component parts of the engine make sure E that each part is in a satisfactory condition for use Chapter II gt a Install Crankshaft Install the three upper halves of the main bearing inserts in the cylinder block Install the three lower halves of the main bearing inserts in the two main bearing caps and oll pump body Coat the main bearing inserts with a light film of oil Install the crankshaft rear bearing oil seal retainer and seal in the rear of the cylinder block Place the crankshaft in the cylinder block and install the main bearing caps and oil pump body on the cylinder block Install the main bearing cap nuts or self locking nuts and tighten them from 80 to 90 pounds feet if using self locking nuts Tighten from 75 to 80 pounds feet if using castellated nuts Pry the crankshaft forward and insert a feeler gauge as shown in Fig 46 PEE CENTER MAIN BEARING CAP Thickness Gauge MIT RACTORF ORUN CON amp 13l a 3605 47 puer le am ty Wooden Wedges Clutch Pilot TIME 7550 4 RM 587 Fig 47 Installing Clutch Disk and Pressure Plate If the clearance exceeds 0 006 inch or is less than 0 002 inch install a different center main bearing insert with a thicker flange to reduce the end play or one with a thinner flange to increase the end play Install lock wire
57. Main Shaft Assembly Disassembled rear end of the transmission Be sure that the gear teeth are not damaged b Disassemble Subassemblies The subassemblies of the trans mission comprise the main shaft assembly countershaft assembly reverse idler assembly power take off shift assembly clutch release bearing assembly main drive gear bearing retainer assembly and the transmission housing Only the first four mentioned will be discussed here as the disassembly of the remainder is obvious after their removal BEARING RETAINER 7134 SLIDING COUPLING 7106 SHIMS 7135 BEARING CUP 7067 COUNTERSHAFT COUPLING 7105 BEARING 7066 COUNTERSHAFT 2ND GEAR 7114 Eh COUNTERSHAFT 7111 BEARING 7066 GASKET 7086 THRUST WASHER POWER TAKE OFF HUB 716 COUNTERSHAFT GEAR 7113 WASHER 351402 S LOCKW ASHER 34807 5 COUNTERSHAFT 4TH GEAR 7112 CAP SCREW 20389 S mas LAA Fig 12 Countershaft Disa OS SL D 3730 47 cor a SNAP RING 7070 COUPLING 7145 THRUST WASHER 7148 GEAR ASSEMBLY 7141 WASHER 7149 SNAP RING 7155 G T A o WE GEAR 7144 T RM 614 Fig 13 Reverse Idler Gear Disassembled 1 MAIN SHAFT ASSEMBLY Remove the bearing from the forward end of the main shaft fig 11 To remove the rear main shaft bearing install a bearing puller on the 60T gear and remove the gear thrust washer and
58. NION PILOT BEARING REPLACEMENT Remove the pilot bearing using a puller that applies pressure on the bearing outer race fig 37 To install a new pilot bearing place the pilot bearing in position in the housing and install the bearing using a tool that applies pressure on the bearing outer race b Differential Assembly The drive gear assembly including the difterential gear case and the drive pinion are furnished only in matched sets and if either is damaged both must be replaced Replace the drive gear assembly if it has chipped or missing teeth or loose or missing drive gear rivets Rotate the bearings on the drive gear assembly and the differential gear case by hand If either bearing binds has excessively loose races is pitted or is discolored due to overheating replace the bearings s1bnar 1 below Replace the differential spider if the di MET ETOR BT at the differential spider gear bearing surfa S 5 152 b 1 730 47T Cor CENTER HOUSING TE TP uem aei mmu i TOS isl us ES 5 TS Pit E i Arina bmi t TNAM A vues c ORETTE Puller m i i E RM 644 Fig 37 Removing Drive Pinion Pilot Bearing spider gears if they have chipped pitted or missing teeth or if the inside diameter is excessively worn Replace the differential side gears if they have broken chipped pitted or excessively worn teeth Or splines Insert a new axle shaft in the differential side gear If the backlash is exc
59. OSITION INDICATION MARKS OM 416 Fig 29 Hydraulie Unit in Position for Adjustments 2 ADJUSTMENT OF FORCE REQUIRED TO MOVE HYDRAULIC TOUCH CONTROL LEVER This is accomplished by tightening or loosening the nut on the end of the hydraulic touch Control lever shaft fig 17 Tightening the nut increases the force required to move tbe lever It should be set so that it requires a pull of 4 to 5 pounds on the knob to move the lever b Internal Adjustments The internal adjustments have been carefully made at the factory However it may be necessary to readjust the hydraulic unit after an overhaul These internal adjust ments must be made before the unit is installed on the tractor The first step in making the internal adjustments is to check the two external adjustments as outlined above and adjust if necessary 1 Support the unit in a vise in a vertical position with the control spring down as shown in fig 29 The lift arms must be supported in IDA CTORF ORDE CaM indicated by the marks on the lift arms 143 b 1 3730 47J POSITION CONTROL PIN POSITION CONTROL SPRING ADJUSTMENT BOLT l maa T T a Ui 7 n Meat ae kF TIE wt 7 d ve i Poi m A LOCATING MARKS FOSITION LEVER L AE DS Lm hu NC We br HYDRAULIC TOUCH CONTROL LEVER CONSTANT DRAFT CONTROL SPRING POSITION CONTROL SPRING OM 417 OM 418 Fig 30 Constant Draft Control and Fig 31 Quadrant Locking Pi
60. Procedure check archives Disassembly Once the rear wheel is off back off the brakes with a screw driver through the adjustment hole using the star wheel adjuster until the drum spins freely Remove the 4 brake drum safety screws and the drum should slide right off You can now see the damage done by oil and determine which parts should be replaced The axle hub can now be removed Don t use anything but the proper 3 point axle puller had to search a little but finally found one to rent for 8 After removing the wire retainer loosen the main axle nut This may require some effort as the recommended tightening torque is between 400 and 500 foot pounds used a 2 socket wrench and a 30 cheater This way my 160 pounds would give me the proper torque 2 5 x 160 400 ft lbs Back the nut off but leave it on the axle so the end is flush with the end of the axle shaft if the hub pops it won t fly off Remove the brakes taking care with the springs My brake shoes were almost new but covered with oil and grease simply cleaned them and all of the brake parts with Brake Kleen they look and seem to work pretty good Remove the 4 studs and 2 bolts holding the axle seal brake support plate in place Inspect the seal and mating surface on the hub found mine seal to be good and polished the hub mating surface don t believe much oil was leaking past the seal am convinced oil was leaking though all of the other joints where there were
61. RANCES LIMIT FIT Crankshaft end play 002 in to 006 in 008 in Main bearing clearance 0005 in to l T L ye 0025 005 in MvTracrorF orom cor Connecting rod bearing 9009 in to clearance 0025 in 005 in Floating INSTRUCTIONS FOR SERVICING CAST IRON SLEEVES PART NO 8N 6055 Bh 1 Remove the old sleeves from the cy linder block as follows a Remove the manifold and all valve assemblies b Remove cylinder ridge c Remove the connecting rod and pis ton assemblies d Remove the old sleeves with a con stant pressure type sleeve remover e Cover the crankshaft with an oil soaked cloth f Clean all varnish and carbon from the cylinder block bore with a ge gkezing tool g Scrape the counter bore clean with a suitable tool NOTE In all cases valve faces and seats should be reconditioned after installing sleeves This is necessary to correct for any valve seat distortion that may be caused by the press fit of the sleeves into the cylinder block bores 2 Install the new cast iron sleeves as follows amp Wash each sleeve in gasoline or naptha to remove the protective coating of oil and dry the sleeve throughly AUTION Do not use an impact type Bleeve installer b Press the sleeves into the cylinder block bores with a screw or con stant pressure type sleeve instali er NOTE When reconditioning valve seats they should be checked with a dial in dicator for runout If this runovt
62. T 40 to 45 1bs ft Cylinder head nuts lsss eee 50 to 55 1bs ft aam SA HITY TAA amp 143 Heil jn E 4 CYLINDER ENGINE CARBURETOR Section Disassembly 0 6 2 ka e susti eee eee ee 221 Cleaning Inspection and Repair 0 0 00000 e eee ee ees 222 Pato k ca a ee ee ee eee ee ee ee 223 221 DISASSEMBLY This procedure consists of removing all parts from the carburetor such as the choke throttle valve levers jets etc a Remove Throttle Body From Carburetor Body Remove the main adjustment ratchet screws and remove the ratchet fig 18 Remove the main adjustment needle assembly from the throttle body Remove the four screws which secure the throttle body to the carbure tor body Separate the two units _ b Disassemble Throttle Body Remove the float lever shaft float and float needle valve fig 18 from the throttle body Remove the gasket and venturi Remove the idler jet and economizer jet with a jet wrench or a small screw driver Remove the idle adjusting needle Remove the float needle seat fig 18 with a jet wrench ohh Q7 THROTTLE LEVER AND SHAFT Lom BODY MESE IDLE ADJUSTMENT MAIN ADJUSTMENT Ma AU Pi IDLE SPEED x ADJUSTMENT MN CARBURETOR BODY FUEL INLET STRAINER RM 453 Figure 17 4 Cylinder Engin 3675 48 C l 221 b Tier ial oe THROTTLE LEVER AND SHAFT 9581 THROTTLE ADJUSTMENT SCREW SPRING 9589 me
63. WHEEL Remove just enough material from the clutch friction surface to obtain a smooth flat surface parallel with the flywheel mounting flange The same amount of material must also be removed from that portion of the flywheel to which the clutch pressure plate is attached If the thickness of the fly wheel measured between the friction surface and the flywheel mount ing flange is reduced to less than 0 855 inch in order to obtain a smooth flat surface the flywheel must be discarded 3 CLUTCH PILOT BEARING REPLACEMENT Drive the pilot bearing out of the flywheel Install the pilot bearing into the flywheel with a fiber block or a rawhide hammer fig 11 122 CYLINDER BLOCK Strip off the old gaskets from all the surfaces of the cylinder block Remove the oil passage plugs from the front and rear of the cylinder block and clean all oil passages in the cylinder block with steam or compressed air Scrape all of the carbon from the cylinder block a Inspection and Repair If the valve springs in the cylinder block are corroded or rusted or if there is a sludge in the valve chamber it is an indica 122 a 3695 47 C2 Ham O T ui AR ul E FLYWHEEIL 6375 CLUTCH PILOT BEARING 7600 RM 589 Fig TI Flywheel and Clutch Pilot Bearing block might be cracked and should be checked thoroughly Replace the cylinder block if it is cracked Replace any expansion plugs fig 1 that are loose 1 STUDS R
64. all nut in your hand and rotate the steering shaft until the center tooth 2 teeth each side lines up with the center of the left Sector shaft opening Place the left sector shaft 3 large and 4 small teeth and thrust washer in the sector shaft bearing housing and position the metal gasket on the housing Install this assembly in the steering gear hous ing with the center tooth of the three large sector teeth meshed in the center space of the teeth on the ball nut While engaging the left sector shaft and ball nut it may be necessary to hold the ball nut in position by reaching through the hole in the right side of the steering gear housing The bearing is eccentric in the sector shaft bearing housing and should be installed with the notch located at the bottom Rotate the left housing counterclockwise as viewed from the left side of the tractor to eliminate backlagt Semme tha oartar ohaft bearing housing by installing the washer MrTRAcTORF ORDE adjustment between the left sector and b 124 b 3730 47 CAN BALL CIRCUITS Erreur RM 643 Fig 8 Timing Sector Shaft and Ball Nut a pull of 2 to 3 pounds is required to turn the steering wheel through the straight ahead position fig 7 Place the right sector shaft and thrust washer in the sector shaft bearing housing and position the metal gasket on the housing The right sector must be engaged with its center tooth meshed in the third tooth spa
65. an aluminum knob on the end This heavy cable comes out of the top right front of the transmission case and goes to the lower right side of the dash panel where it ends with a black plastic knob Push the knob in for overdrive The Sherman over underdrive transmission also has the shift lever on the left front side of the transmission case The lever attaches with an allen head cap screw and runs horizontal with the case then makes an abrupt bend and sweeps back and up to a small cast knob on the end To view original Sherman literature and specs for the over underdrive combination transmission click here page 1 click here page 2 To view Sherman step up transmission literature click here Another not so common auxilliary transmission was made by the Hupp Company The shift levers for the Hupp units were on the right front side of the transmission case and extend rearward Like Shermans they were also available in overdrive underdrive and over underdrive configurations To view original Hupp sales literature courtesy of Ed Gooding click here page 1 click here page 2 Iop of Page Home page SHERMAN COMBINATION TRANSMISSION elBP UP STEP DOWN nit They were available Some Sherman overdrives were installed with a cable assembly to shift them MODELS 519 3 AND 519 155 Ford Model Numbers Or MODELS 10A700B AND 1201 Sherman Products Inc Numbers PARTS LIST Ref No Ford No Source No Description Qty 1 51900
66. and bushing assembly with the coupling teeth facing the end of the hub fig 13 Install the thrust washer and snap ring on the reverse idler gear and bushing assembly Install the reverse gear coupling on the reverse idler driven gear sleeve with the coupling teeth facing the coupling teeth on the driven gear d Power Take off Shifter Assembly Install the snap ring fig 14 in the bearing support Install the clutch sleeve in the bearing support with the large end of the sleeve facing toward the bearing cup end of the bearing support Install the bearing and snap ring in the bearing support Install the interlock spring and ball Depress the interlock bali then push the shift rail into the bearing support until the threads on the rail are flush with the bearing support Hold the shift rail stop in position in the bearing support and push the shift ral into the shift rail stop Install the nut and lock washer on the shift rail e Transmission Cover If the shift lever has been removed rein stall it securing with a lever pin This pin should be installed with an arbor press or bench vise Install the safety latch plate Place spring 7227 in position as shown in fig 15 Slide the gearshift lever through the spring and safety Jatch plate and turn it 90 degrees until the pin is properly seated in the slot in the bottom of the cover Compress the spring and install the spring retainer 7228 Position a new gasket on the starter switch and i
67. aning smiling in digging im Thar gives pou mari man traction Ypa nier inke ull advantage uf engine torque and thereby oprint at bigh ext econous You work mean more EDTTT dey wt ubeimntial per amp cre saving ru gasuline eal ard engine wear The Comhiratier payi ng joel many times over COMBINATION fH sas a 345 345 1 23 AE 4 19 Eri xe am ee aw s SPECIFICATIONS TIL 15 ATI 5 35 KT t als 433 a amp 74 m CErap Dauwa rw 1 313 1 Bayt 3 71 ET T4 23 kondera rein n rain E s cun Sius Lip ratio UAM TE ana PSI rec fami Wagn H is ag 11 83 3 15 47 zi Dd apariy pz E13 Tn 1 23 11 1331 tenming prasiiinna Manhaj iige ahima 2 1 40 ain a 58 ET LL Jag 3l an amp BB BFI 7 TF r2 10 17 1331 HAVE AN OLDER 3 SPEED TRACTOR HERE ARE YOUR COMBINATION WORKING GEARS AND PTO SPEEDS As boo REA Ar 1300 EFM As 1755 BPH Engine ica d Engina ipad Engane Speed Act Full TErgiiiu GEAR Grund ero Damini Fro Bsmumd MID oer FID Tarea h keer j ened PTT Bekad api prie sd F MM EFH MPH jEP MI AP nd Pi MEE mmu TE Tu w J i TE sae 3n7 ain Ttar THO lBilsp Euwn dni 3 JA I 1 9 E FAT 4i 1 d i Standerd lri LF tJ a 345 ML H 4 07 EFI Bondoeed Trd 1 31 14 5 a jjj i 1d amp 4 13 i Diep 1a LI i41 i UF LL Fy amp DN 112 Memelln Dez Aa 155 Hd La i ud PTS Dems Anu LE ZW Tu LE a amp n 1 E Tomiki dra 5 34 43 ESI Sas E34 a 12 13 az ihe pe le Xd an 7
68. at sometimes it develops a leak and won t float Use compressed air to blow out all passages Re assemble the float valve and float without the venturi or new gasket Hold the throttle body up side down and observe the space between the float and the throttle body The surfaces should be parallel Distance is important just over 1 4 less than 5 16 Now remove the float carefully slip the venturi through the gasket and lay it in place then put the float back on Screw the throttle body back onto the carb body Now you must check the float to make sure that it s not hanging up on the carb body Do this by holding the carb near your ear and quickly turning it over You should hear a thunk without any sound of metal scraping Do this several times Also blow into the gas inlet Right side up air will pass easily Up side down no air will pass If the float is hanging up the valve won t seal and air will always pass I n this case you must disassemble the body and try to bend the float just a little Re assemble and test again Repeat this process a dozen times or more until you get it right Even new floats hang up must have been a casting irregularity in the body Anyway you gotta get this right Use a new gasket when you mount the carb to the manif old nitial settings on the mixture screws are to turn them all the way in and then back each out 1turn With the engine warm you can fine tune the mixtures The N series ca
69. balanced Compression pressure at cranking speed sea level 90 Ibs minimum d Ignition System OE VOGs 6 oat E E ee ee eee we ee ba ees Battery Distributor Fin OIGO E 2299 eo EGER RGR US ASU OT on ee 1 2 4 3 Drive ce et ee RR Rm s Directly by camshaft Automatic spark advance s Centrifugal governor Initial timing degrees of crankshaft Top dead center Maximum advance degrees of crankshaft 24 Distributor breaker cam 0c eee eene 4 lobe Breaker contacts esser m hr l set Breaker contact spacing slelseeee es 0 015 in Spark plugs WDR Los r2 3x24 xU 2x 2I EROR OR OXCBUR E Marked H 10 eo hn he ea be ee ee oe Hees ee ee eee 14 mm UD lus EX E ee GR E SUE Bee P 0 025 to 0 028 in fu MERERI Single up draft Idle fuel adjustment 1 ecreur CON 112 f 3730 47J f Governor Type Variable Speed mechanically operated centrifugal type Governed speed range 800 to 2200 R P M Maximum governed speed adjustment 1 screw g Cooling System Radiator cap pressure type Pressure valve opens at 314 to 414 lbs per sq in Vacuum valve opens at L to 1 Ib per sq in Water Pump jha IW Centrifugal p ce V belt Fan DV DG xan ees eee ady ee eedenedecdousan exvcahesaas 6 blade pull a V belt Thermostat Location li lllo eae Cylinder head outlet hos
70. body 2 DRIVE GEAR BUSHING REPLACEMENT Drive the bushing from the oil pump body with a driver To install the bushing press it into the oil pump body until the inner edge of the bushing is flush with the oil pump body Ream the bushing from 0 5625 to 0 5630 inch diameter b Assembly Place the drive gear in the oil pump body Press the driven gear on the drive gear shaft making sure the flat in the gear is in line with the flat side of the shaft Install the driven gear in the oil pump body 127 WATER PUMP The disassembled water pump is shown in fig 34 a Disassembly Place the water pump in a vise Drive the shaft out of the pulley with a driver as shown in fig 33 Remove the snap ring fig 34 from the water pump body Press the shaft and bearing assembly out of the water Pump body fig 34 MyvTeacrorF orow CAN Remove the water pump seal snap ring wa from the impeller fig 34 WATER PUMP ER n 20 HOUSING UT d RM 595 Fig 33 Removing Water Pump Pulley b Cleaning Clean al of the metal parts thoroughly with cleaning fluid c Inspection Replace a cracked or damaged water pump body fig 34 Replace the water pump seal if it is worn Replace an impeller if it is cracked excessively pitted or if it has broken or damaged fins Replace a pulley hub that is cracked or has stripped threads Rotate the water pump bearing If the bearing binds or has a tendency to stick replace the b
71. buretor Throttle Body xr Main Adjustment Ratchet Replace the main adjustment ratchet if it is broken fig 18 223 ASSEMBLY This procedure consists of installing all parts such as levers springs valves ete on the carburetor a ssemble Carburetor Body Place the choke return spring on the choke shaft and lever Install new felt seals on the lever end of the choke shaft Install the choke shaft and spring in the carburetor body Hook the choke return spring on the peg on the body and on the lever so that the choke shaft lever will rest on the peg Install the choke plate in the choke shaft While holding the choke plate in the closed position install and tighten the two choke plate screws and washers Install the maximum fuel limiting jet in the carburetor body fig 19 with a small screw driver or jet wrench Install the main nozzle and new gasket b Assemble Carburetor Throttle Body Install the idler jet and economizer jet fig 18 in the throttle body with a small screw driver or jet wrench Install the float needle and a new gasket with a jet wrench Install a new felt seal on the lever end of the throttle shaft Install the throttle shaft and lever in the throttle bodv Place the throttle plate on the throttle shaft and ins MrT LT Tg Farne hr washers Hold the throttle lever in the c B 4 223 b mimm Buh av athe the two throttle plate screws Install the idle fuel adjusting screw and spring Turn the scr
72. ce on the left sector gear counting from the solid section of the gear located on the bottom as shown in fig 8 The tooth on the right sector can be identified by a dot or mark on the end of the tooth The tooth space on the left sector also can be identified by a dot or mark The bearing is eccentric in the sector shaft bearing housing and should be installed with the notch located at the bottom Rotate the housing clockwise as viewed from the right side of the tractor to reduce backlash The adjustment between the right and left sector should be such that the force required to turn the steering wheel through the straight ahead position is 3 to 6 pounds ccm lw ar The steering gear assembly should be fille i inii oil may be pumped into the right side of t Lille puen muuomg through the pipe plug hole TORF ORUM CON Chapter 8 Service Bulletins The information contained in this chapter has been compiled from Model 8N Tractor service Bulletins Use this material as a guide when performing maintenance and repair operations on the tractor Attachments which were issued with the bulletins have been OPUNEA and numbered and are now included at the back of this publication TRACTORF ORUM COM 8N TRACTOR SERVICE INFORMATION ENGINE Bulletin Subject New Valves and Adjustable Tappets for the Ford Tractor Kit No 8N 6516 Over the past year in certain localities a few owners have encountered some di
73. ce the other end under the head of the adjacent tappet as shown tappet lwi TYaplid LL LHe Lo the hea 129 Wrenn os die Weste eae eee 3 To prev ATTACHMENT f FORD TRACTOR 8N ENGINE RING OVERHAUL with General Specifications To check the clearance of a piston in e yl PISTON PULL SCALE inder bore use a thickness gauge 1 2 wide ET CYLINDER BLOCK and long nough to extend over the entire length of a piston Attach the thickness gauge to a t nsion scale and place gauge on the side of the piston so that it is 90 right angle from the piston pin hole Invert the piston and without rings push into bore far enough 0 as to have i to 1 1 2 clearance between hs MONS k e a tg T LUE UE p SOR m d e a4 d Fig h at ENERO a ann Fe xh ob x Hn mw wh 8 wo Om r Bad nemiran bottom of piston and top of block withdraw E ua e a ata as nu nu ag m 9 hh B b n e De MUR ats ne aat un ad PUR a a e e nn the gauge and observe the reading on the ten eat atat t gag ON OH r oa WoW a T LRL ta a ara tion scale Wm RE Wm HON Wee MOOD eens WW niu renee le X se a n e eta a h a e at m LJ Prena un The thickness gauge to use and the pounds pull for various piston and sleeve combinations are as follows Cylinder and Aluminum Pounds Piston
74. d is thereby rotated through an arc by the movement of the ball nut fig 2 The right sector engages the left sector and rotates the same number of degrees in the opposite direction The pitman arms transfer the motion of the sector to the spindle arms through the drag links 121 ADJUSTMENTS When the wheels are in the straight ahead position all backlash should be removed but if the wheels are turned to the extreme right or left a slight backlash will be present due to the gear tooth design This characteristic permits a backlash adjustment for wear between the worm nut teeth and the sector gears in the much used center position without causing binding or tightness in less used portions of the sector gears and worm nut Steering gear adjustments may be checked before removing the unit from the tractor or disassembling the unit Adjusting the steer ing gear on the tractor in many cases will eliminate excessive back lash caused by improper adjustment between the sectors and the b ll nut To determine the cause of excessive backlash first check the adjustment of the steering tube bearings Disconnect the drag links from the pitman arms Turn the steering wheel to the right or left to the end of its travel then back about 14 ti Lo PL f required to rotate it by use of a spring scale JA iT CTORF ORDE CAN fig 7 If a force from 14 to 114 pounds will 8730 47 amp 191 motion during the next 14 turn toward the center p
75. d from the left sector and both sectors were supported by a bearing on one end only In the new assembly the sectors have bearings for support at both ends Another advantage is that now the right hand sector is meshed directly with the bsll nut and the left sector is meshed with the right sector Backlash in the assembly can be eliminated by tightening up the adjusting screws extending through the right and left sides of the housing In the event that a new steering assembly is to be instslled on an older model tractor notches may be cut in the old panel assembly rather than replacing it with the new panel assembly Change No 10 on All Tractors Starting with Serial No 216989 on September 2 1919 Old No 8N 330h Link Assembly steering drag R H replaced by New No 8N 3305 B Link Assembly steering drag L H Ihe above numbers are interchangeable Old No 8N 3305 Link Assembly steering dreg L H replsced by New No GN 330l B Link Assembly steering drag R H The above numbers are interchangeable See the chart on Page 22 of the Ford Tractor Parts and Accessories Catalog PA 5933 2 for further information on drag links On the old steering assembly the right hand dra link was the longest In the new assembly the right sector is controlled directly by the ball nut and consequently the Left hand drag link is the longest There is no change in material or speci fications only that the long drag link is now on the left side and the short
76. diameter Piston pin to piston fit is 0 000 0 0002 This may seem tight but under operating temperature the expansion of the piston will permit sufficient clearance for efficient operation PISTON RING END GAP Place each new piston ring in the cylinder and press it about haifway into the cylinder bore with AN INVERTED PISTON 0 the ring will be square with the cylinder wali Measure the ring gap with a thickness gauge If the gap is less than 0 007 0 017 in the top compression ring and less than 010 01 T in the second compression and oil ring emove the ring and file it with a fine cut file until the correct ring gap is obtained Ring end gap should be Staggered on the piston at 1209 when engine is being assembled ATTACHMENT j CONNECTING ROD ALIGNER PISTON PIN CONNECTING ROD CHECKING CONNECTING ROD FOR TWIST FEELER GAUGE PISTON RING MEASURING PTSTON HING END GAP TORQUE WRENCH READINGS yergue Values 79 85 Lbs Ft Main Bearing Nuts 90 100 Lbs Ft Main Bearing Place Bolts Connecting Rod Nuts Castellated 35 40 Lbs Ft Connecting Rod Nuts Self Locking 35 40 Lbs Ft Connecting Rod Nuts Marsden 35 40 Lbs Ft Connecting Rod Lock Nuts Pal 4 Lbs Ft linder Head Nuts 50 55 Lbs Ft tinder Hear LI B Fly wheel se a ye LM Spark Plugs ATTACHMENT jl Plastigage inserted on bearing shell before it has been re tnstalled and tightened Plastigage after bearing
77. driven by the transmission main shaft The differential furnishes the power directly to the semi floating rear axles 112 SPECIFICATIONS The following specifications are given as an aid to the mechanic in repairing the Model 8N Ford tractor a General Type else My TRACTORF ORON CON Wheelbase lol ll sss 70 in at 48 in tread width Over all length front to drawbar 0 lessen 115 in Over all height 0 0 eee 5414 in Over all width normal tread uaaa aana lll ulus 6424 in Tire size inen e i axi eade E RRWAREXAEREGERLOSEEIZIES E 4 00 x 19 4 ply GA PE 10 00 x 28 4 ply Front tread l lllsssn 48 to 76 inches in 4 inch steps Rear tread llu un 48 to 76 inches in 4 inch steps Ground clearance Front axle ee ewe nec apa hee eaaRa ug 2 in Rear axle eee aa 21 in Oe CI 13 in Turning circle radius with use of brakes Made by outer front wheel 0 000 000 ce ce ee 8 ft Made by centerline of tractor at rear axle 3 L6 ft Shipping weight including gasoline oil water tires filled with air operator not included 2 410 lbs Drawbar height 8L4 to 3414 in 18 in standard setting Gear Ratio Reduction 1st OR PM 2000 WP M 1 Low first 73 33 to 1 2 54 M P H 3 40 M P H 2 Plowing second 57 04to01 3 28 M B H 437 MEH 3 Cultivating third 41 45 t 1 4 51 M P H 6 02 M P H
78. dy screw in the body To check the governor arm adjustment install the governor on_ the governor setting gauge and tighten the wing nut on the gauge finger tight Hold the governor lever in the wide open position and insert the GO and NO GO gauge as shown in fig 43 If the gauge cannot be inserted the clearance is insufficient and must be adjusted If only the first step can be inserted the clearance is satisfactory If the second step can be inserted the clearance is excessive and must be adjusted If the clearance 1s either insufficient or excessive lay the governor arm across the bosses on the gauge figs 44 and 45 Strike the center of the governor arm with a light hammer Recheck the arm adjust ment 129 OIL PAN INTAKE AND EXHAUST MANIFOLDS Clean the oil pan thoroughly Replace an oil pan that has stripped threads in the drain plug hole or one that is badly dented distorted or cracked Replace the oil pan drain plug ar H damaged ivTRacTorF orom CON 129 3695 47 IA LS TA 7 RM 631 Fig 44 Correcting Insufficient Fig 45 Correcting Excessive Clearance on Governor Clearance on Governor Arm Arm To clean the intake and exhaust manifolds scrape off all the carbon and ali parts of the old gaskets Clean the manifolds thoroughly Replace a manifold that is cracked or broken Replace broken or damaged manifold studs sec 122 AMET CTOR Forum cor ASSEMB
79. e control lever away from the top of the quadrant should cause a simultaneous movement of the control valve arm away from the pump face Movement of the control valve arm should begin at the start of movement of the hydraulic touch control lever There is only one position in which the quadrant support plate can be located where both of the above conditions will be met To find this position slightly loosen the four cap screws that support the quadrant Hold the hydraulic touch control lever at the top of the quadrant and gently tap the quadrant support plate forward or backward until both of the above requirements are fulfilled 8 Tighten the four quadrant supp WT Te ar TT Wil d install the inspection plate on the cente 7 143 b 8 3730 47 en ee MO Chapter i STEERING GEAR Section Adjustments Lille e ee e eL aLL 121 Disassembly 0 ccc cnc cee e ccc ceeee ce 122 Inspection and Repair 20 00 0000 ccc eee LLa 123 Assembly aaau cc aa eee eeeee 124 The steering system includes the steering gear steering wheel and steering drag links between the pitman arms and the front axle spindle arms The steering gear is of the recirculating ball bearing worm and nut type Anti friction steering is achieved by steel balls which serve as rolling contacts between the worm and nut Rotation of the steering tube shaft moves the ball nut along the worm The left steering sector engages the rack on the ball nut an
80. e Starts to open eas 160 165 F Fully open auauua aaan araa al 190 200 F h Electrical System Generator Type aaua aana aaa aa a Ls 3 brush D i i d E eh ew es ee V belt Rating 1500 Engine R P M T EESE 10 amps Maximum output 0 002 eee ee eee 11 amps Capacity eee eee eee nee netnnnay 119 watts Generator regulator Cutout closing voltage TT 6 0 to 6 3 volts Voltage regulation llle cee ee 7 0 to 7 3 volts Battery TyDe csus auae a xa ER RRRREAGA ev Tu 6 volt Drive een Automatic engagement i Transmission U be e PE Constant mesh Release bearing pre lubricated 00 Ball bearing Pedal free travel o Le eee su 34 in j Rear Axle TYPE cee aula TAA FTT qd UD Ratio eee LL sss SALT ATA 3730 47 112 k nie EH A dL BLL k Brakes uas wa susrasa ee ee ake a oe es lInternal expanding Control L T R Individual mechanical Adjustment at each wheel 0 00 000 cee eee 1 screw Brake pedal free play 0 0 eee 4 in Thickness of lining 00 00 0000 nn 0 187 in Width of lning auauna nananana ee m Rr 2 000 in Length oflining leeeee eee nn nn 12 910 in Total brake lining area two wheels 103 3 sq in l Steering Gear Type peuwes Seka eee cee wee EE Automotive ball nut Ratio turns of steering wheel for total travel of pitman arms at 48
81. e f o sS f77 Fig 15 installing Cylinder Sleeve e Valve Seat Refacing Reface each valve seat with a 90 degree included angle valve seat grinding wheel or valve seat cutter until the face of the seat is cleaned up and free from pits or nicks If a valve seat cutter is used it will be necessary to lap the valves into the seat The time ordinarily required to lap the valves is saved by using an eccentric type valve seat grinder with which the grinding wheel contacts only one portion of the seat at any given time If the grinder including the pilot is in good condition and the grinding wheel is kept sharp and properly dressed it ordin arily is not necessary to lap the valves into the seats After refacing the width of the valve seat should not be more than 0 125 inch measured across the face of the seat fig 16 If the seat 1s too wide remove just enough stock from the top and or bottom of the seat to reduce the width to 0 062 inch Use a 120 degree included angle valve seat cutter for removing stock from the tr oi ha 7 3 60 degree included angle cutter for removi METTRA RUIT bottom of the seat 122 e 3695 47 CYLINDER BLOCK QU ctn RM 512 Fig 16 Measuring Width of Valve Seat 123 PISTONS AND CONNECTING RODS To disassemble the piston and connecting rod remove the piston rings with a piston ring expander Remove the two piston pin retainers fig 17 and push the piston
82. e the cover to the housing Remove the cover and gasket Remove the cotter pin castellated nut washer driven gear and bearing from the pulley shaft Tap on the side of the pulley to remove the shaft from the housing Remove the four cap screws that hold the pulley to the shaft Remove the pulley Lift the drive gear and bearing assembly from the housing Remove both oil seals from the housing PULLEY An RUAU deH B T nur PLUG COM Fig 50 Belt Pulley Ti atl mere i PULLEY SHAFT 746 SEAL 750 e BEARING CONE 743 BEARING CONE 743 Ves HOUSING 762 GEAR 745 559 W ASHER 371505 s Tn M m Q NUT 33860 S EC dl d E GEAR 737 NN COVER 741 Ber ON SEAL 749 BEARING CUP 744 BEARING CONE 743 BEARING CUP 753 GASKET 747 RM 609 Fig 5i Belt Pulley Disassembled 172 INSPECTION AND REPAIR Clean all parts thoroughly in cleaning fluid Discard all used __ gaskets and oil seals Inspection must cover the housing gears shaft bearings and pulley a Housing Replace the housing fig 51 if it is cracked if the gasket surface is damaged or if the threads are stripped Replace a bearing race if it is pitted corroded or cracked To remove a bearing 3race drive it out of the housing with a brass drift To install the race drive it into the housing with a driver that wil apply pressure evenly on all sides of the race b Drive and Driven Gears Matcb
83. earing assembly Replace the bearing assembly if there is end play or side play in the shaft FAN PULLEY 8610 GASKET 8507 SEAL 8564 BEARING 8530 BEARING SLINGER 8550 HOUSING 8505 COVER PLATE 8508 Fig 34 Water Pump Disassemble armkE AF S 27 a Cia Ld dae Puller WATER PUMP HOUSING FIC T Comes t UU SHAFT AND BEARING ASSEMBLY RM 594 Fig 35 Pressing Bearing and Shaft from Pulley Hub d Assembly Press a new bushing in the body if the old one was removed Dip a new seal and seal washer fig 31 in hydraulic brake fluid Install the spring and seal assembly seal washer and snap ring in the impeller Press the bearing and shaft assembly into the body fig 31 Press the impeller onto the shaft until it is flush with the end of the shaft Install the water pump body snap ring in the body Press the pulley onto the shaft until the pulley is flush with the shaft 128 GOVERNOR Remove the screw fig 36 that secures the driver unit to the body Lift the driver unit from the body Remove the hairpin clip then remove the flat washer shims fork base thrust bearing upper race and balls fig 37 from the shaft Remove the oi tube elbow connection from the body Drive the grooved pin out of the fork and lever as shown in fig 38 Pull the levers out of the body Remove the dust seal and needle bearing from the body a Inspection Inspection of the governor
84. ecure the pinion to the housing Place the thrust washer and differential side gear in the drive gear assembly Install the four differential spider pinion gears and thrust washers on the differential spider and place the spider including the gears in position on the drive gear assembly Install the thrust washer and differential side gear in the differential gear case Line up the match ing numbers on the drive gear assembly and differential gear case so that the numbers are directly opposite each other Place the two assemblies together Instal the eight bolts that secure the two assemblies together and tighten them evenly Lock the eight bolts with locking wire Be sure that the differential side bearings are thoroughly clean and apply a thin coating of grease on the bearings Place a new gasket on the right hand side of the center housing Position the right hand axle housing on the center housing Install and tighten the nuts Position the differential assembly in the center housing with tbe flat side of the drive gear facing the left hand axle housing Place a new gasket on the center housing Position the axle housing on the center housing Install and tighten the nuts Install the axle shafts in the housings Install the gaskets and the oil seal retainers on the bearing retainers Secure the brake shoe brackets to the bearing retainers with two cap screws in each bracket Coat each axle housing flange with a light film of grease Posi
85. ed Replace both gears if either gear has broken chipped or worn teeth if the gears are excessively noisy when operating or if the oil seal surface on the drive gear is damaged c Pulley Shaft Replace the pulley shaft fig 51 if the splines or o1l seal surfaces are damaged or if the threads are PS aac 4 d Bearings Replace a bearing fig 51 tt or if any of the rollers are missing Remove the Mvipa IT E cor as shown in fig 52 172 d 273i10 47T BEARING WEDGE Gear Puller DRIVE GEAR BELT PULLEY LS RM 653 Fig 52 Removing Bearing from Drive Gear e Pulley Eeplace a pulley fig 51 if the belt surface is worn or if it is loose on the hub BELT PULLEY ASSEMBLY nnm en PLN T car El 173 ASSEMBLY Install new oil seals in the drive shaft and pulley sides of the housing fig 51 Make sure the pulley shaft outer bearing inner race is in place before this seal is installed Install the drive gear and bearing assembly in the housing Position the pulley shaft assembly part way in the housing and install the inner bearing driven gear flat washer and nut on the shaft Tighten the nut then tap the pulley shaft into the housing with a rawhide hammer Repeat this procedure until the pulley shaft requires a torque of 5 to 12 pounds inches to turn it freely Install a cotter pin in the nut and shaft Install a new gasket and position the cover on the housing
86. ed to as repair a Remove Generator Remove the nuts that secure the generator adjustment bracket to the timing gear side cover and generator Disconnect the generator wiring Remove the bolt and washer that secure the generator to the cylinder front cover and remove the generator fig 2 b Remove Oil Filter Disconnect the oil inlet line at the cylinder block Disconnect the oil return line from the governor Remove the two cap screws that secure the oil filter bracket to the cylinder head Remove the oil filter and lines fig 1 a c Remove Distributor and Spark Plug Y two nuts that secure the spark plug wire cond head Remove the two cap screws and lock was ROE AF amp 112 Cc ivTracrorF oro com CYLINDER HEAD 6050 V CYLINDER BLOCK 6010 are er VU ccuibtR FRONT SO WT PME MTM ual COVER 6019 i ile jak TIMING GEAR SIDE COVER 6017 RM 503 Fig 3 Stripped Engine distributor to the cylinder front cover Remove the distributor and wires d Remove Carburetor Remove the two nuts and lock washers that secure the carburetor to the intake manifold Remove the carburetor fig 2 e Remove Starting Motor Loosen the two starting motor ap screws until the starting motor is free of the clutch housing Lift the starting motor froni the engine fig 1 T13 ENGINE DISASSEMBLY This section contains instructions for the complete disassembly of the strip
87. ee THROTTLE ADJUSTMENT SCREW 9610 Wu MAIN ADJUSTMENT NEEDLE 9565 MAIN ADJUSTMENT NEEDLE SPRING 9540 WASHER 356211 5 MAIN ADJUSTMENT NEEDLE GASKET 9563 FUEL INLET STRAINER 9553 FLOAT LEVER SHAFT 9558 CARBURETOR THROTTLE BODY 9506 MAIN ADJUSTMENT RATCHET 9536 dr SCREWS 355000 5 FLOAT NEEDLE SEAT GASKET 9569 FLOAT NEEDLE AND SEAT 9564 UPPER TO LOWER BODY GASKET 9519 FLOAT AND LEVER 9550 PLATE 9585 IDLE ADJUSTMENT NEEDLE SPRING 9578 IDLE ADJUSTMENT NEEDLE 954 IDLER JET 9596 ECONOMIZER JET 9914 VENTURI 9586 CARBURETOR BODY 95077 WEE CARBURETOR DRAIN PLUG 358043 5 RM 461 Figure 18 Carburetor Disassembled Remove the two screws which secure the throttle plate to the shaft Remove the plate and throttle shaft from the throttle body c Disassemble Carburetor Body Remove the main metering jet fig 19 with a screw driver or jet wrench Remove the two screws and Jock washers that secure the choke plate in the choke lever and shaft Pull the choke plate out of the shaft with a pair of pliers Remove the choke shaft and lever and choke return spring from the carburetor body 222 CLEANING INSPECTION AND REPAIR Clean all part thoroughly in a cleaning solution Blow out all jets with compressed air a Carburetor Body Replace the carbure if the threads are stripped or if the jets ar opened without damaging t
88. ended that the entire carbure tor assembly be replaced In these cases submit an S A R claim covering the cost of such replace ment The percentage of defective carburetors will be very low and the recommendation given in item 6 above is not to be construed as a basis for making an all out car buretor replacement campaign Correction should be made on Page 82 of the Ford Tractor Operator s Manual Ford form 3729 50 F The paragraph in the middle of the page reads The idle adjustment needle should he opened approximtely two and one half revolutions This sentence should be corrected to read The idle adjustment needle should be opened approximately one 1 revolu tion TRACTORS ORUM COM
89. eplace damaged or broken studs par d below gt o 2 VALVE SEATS Replace any valve seat insert that is cracked ot that is loose in the cylinder block par f below Reface valve seats where there is any indication that the valve has not been seating if new guides are to be installed or if the width of the seat fig 16 measures more than 0 125 inch par e below NOTE If the engine has been completely disassembled reface all valve seats 3 CYLINDER SLEEVES Replace the cylinder sleeves par b below if a ridge is present at the top or if the sleeves are col lapsed or scored 4 OIL RELIEF VALVE Replace the oil relief valve spring fig 12 located in the cylinder front cover if its tension 1s less than 44 ounces or more than 46 ounces when the len pr Se compressed to 1 40 inches Install the valve spri a IRACTAR ABT the cylinder front cover MEN amp 199 a A cor PLUNGER 6663 GASKET 6669 i BV ae A OIL RELIEF VALVE b o NUT 6666 B SPRING 6654 RM 511 Fig 12 Oil Relief Valve Disassembled b Steel Sleeve Replacement Remove the sleeves from the cylinder block using a crushing tool fig 14 Drive the tool all the way to the bottom of the cylinder then pull the crushed sleeve out of the cylinder Install new sleeves using the replacer as shown in fig 15 After the sleeves are installed use a piston without rings or plug gauge in the cylinder to dete
90. essive replace the differential side gear Replace the differential spider gear thrust washer if excessively worn 1 DIFFERENTIAL BEARING REPLACEMENT Remove the bearing from either the drive gear assembly or the differential case using a puller that applies pressure to the inner race fig 39 To install a new bearing on the drive gear assembly or differential case place either part in a press and with a driver that applies pressure to the inner race evenly press the bearing on the case until it is firmly seated on the shoulder of the case c Drive Pinion Assembly The drive gear assembly and the pinion gear are furnished only in matched sets and if either is damaged both must be replaced Replace the drive pinion sleeve if it is cracked Replace the drive pinion bearing cups in the sleeve if they are cracked pitted corroded or discolored due to overheating subpar 1 below Replace the drive p LL p pitted or missing teeth or if the sh TM rri ben splines Replace the pilot bearing inne Lunam Mode S 152 c Wrenches 4634 P ath RM 669 Fig 38 tnstalling Drive Pinion Assembly pinion if it is badly scored subpar 3 below Rotate the bearing on the drive pinion by hand If it binds has excessively loose races or is discolored due to overheating the bearing must be replaced subpar 2 below Puller DIFFERENTIAL ASSEMBLY x pf Mice MIS obe T VEL pose TA 317530 47T DR
91. ew in until it seats lightly then back it out 24 of a turn Place the venturi fig 18 in the gasket Place the gasket on the throttle body so the large end of the venturi seats in the throttle body Place the float needle valve in the float needle valve seat Install the float in the throttle body Secure the main adjustment ratchet to the throttle body with two screws and washers Set the float to the correct level fig 20 c Assemble Carburetor Throttle Body to Carburetor Body Place the carburetor throttle body on the carburetor body as shown in fig 21 being careful not to bend the float Secure the carburetor throttle body to the carburetor body with four screws and lock washers Install the main adjustment needle assembly using a new gasket fig 18 Turn the adjustment needle in until it is seated lightly then turn it out 114 to 114 turns T A aeow cow 8N Fuel and Startng Problems There was a fuel related starting problem when I first purchased my tractor All of my subsequent starting problems have also been fuel related Either the f uel system plugs from tank debris or f uel pours out of the air intake on the carb The following float adjustment procedure should be used to cure the flooding problem The fuel f rom the intake flooding problem is so common as to be the norm The problem is that the float valve is not closing Either the float is hanging up on the side of the carb housing or the needle valve is bad or has cr
92. fficulty with tractor engine valves sticking or burning particularly the exhaust valve For the purpose of relieving this condition new valves and adjustable tappets have been developed for service replacement on the Ford Tractor niim The new valve will relieve exhaust valve failure attributable to excessive deposits of the valve seat and or valve stem These experiences are local in character and replacement of the standard valves with the new valves is not subject to warranty or policy adjustment Please do not submit SARs for replacements A Kit Part No ON 65l6 is now being made available It contains four new valve assemblies and eight adjustable tappets with wrenches The wrenches are included to hold the tappets while adjustments are being made for length In Attachment No 1 you will find a complete description of the valve as well as a drawing and instructions for proper installation and Servicing Complete instructions for the installation of the tappets are included in each kit You Will note that tappets are to be used for all eight valves however the new valves should be used only in the exhaust ports These kits are available for immediate shipment as announced in Service Parts Release and Change Notice No 50 2 Dealers should be advised of the avail ability of the subject parts particularily in those areas where sticking or burning valves are now problem wet ee Bulletin Subject Engine Overhaul Gaske
93. fig 31 on the shaft in the oil pump Install the oil pump screen cover assembly and gasket onto the oil pump Secure the screen cover assembly to the oil pump body with the three cap screws and lock wire h Install Cylinder Front Cover and Camshaft Gear Side Cover Hold the camshaft gear side cover and gasket in place on the cylinder block and install the two lock washers and cap screws Install the oil slinger on the crankshaft NOTE Soak the crankshaft packing in ou installation Install the cranEshaft packing in the recess provided in the cylinder front cover Insert a new gasket and cylinder front cover on the engine Insert a thickness gauge between the camshaft gear and cylinder block while forcing the camshaft ahead with a hammer handle fig 54 If a clearance of more than 0 004 inch exists replace the cylinder front cover i Install Oil Pan NOTE Soak the crankshaft packing in oil for two hours before installation i Install the packing in the recess at each end of the oil pan Coat zthe bottom machined surface of the crankcase with grease to hold the oil pan gasket in place Install the oil pan gasket on the cylinder block Position the oil pan on the cylinder block and install the cap screws j Install Crankshaft Pulley Place the crankshaft pulley on the crankshaft Turn the pulley by hand until the slot in the pulley is lined up with the woodruff key in the crankshaft Drive the pulley on the cra
94. g rod bushings must be replaced tf the old bushing does not provide the correct fit for a standard piston pin par d below If a connecting rod bushing or a piston pin hole is worn and its inside diameter does not measure more than 0 7535 inch it can be reamed and burnished or honed to fit a 0 001 inch or a 0 002 inch oversize piston pin T he correct fit for a piston pin in the connecting rod bushing exists when the pin to be used will MvT TET F arom com the bushing by its own weight when the piston 123 b 3695 47 CONNECTING ROD BEARING MICROMETER ROUND PIECE OF STOCK RM 412 Fig 22 Measuring Connecting Red Bearing for Wear correct fit for a piston pin in the piston exists when it can be inserted in the piston by a light push by hand with the piston and pin temperature at approximately 70 degrees Connecting Rod Bushing Replacement Drive the bushing hen the connecting rod with a suitable driver Press a new bushing into the connecting rod Drill the four oil holes in the bushing to the same size as the holes in the connecting rod Ream and burnish Of mule as idm hone the bushing to 0 7505 inch Check the alignment of the con necting rod correcting any misalignment figs 20 and 21 aver My TRACTORE ORUM COM Fig 23 Measuring Piston Ring End E m amp 1252 Piston Ring Remover and Replacer dui er RM 638 Fig 24 Installing Piston Ring on Piston d Assemble Piston Piston Pi
95. g the aluminum front and aluminum timing gear side covers Part No 8N 6019A cover cylinder front cast iron and Part No 8N 6017A cover cylinder timing gear side cast iron have not been used in production but are listed as optional and may be used in the future The Part No ON 6020 B Gasket Cylinder Front Cover is supplied in the Engine Overhaul Gasket Kit for use with the cast iron covers Bulletin Subject Factors to Consider in Replacing Crankshaft Bearing Liners It is well recognized that crankshaft bearing liners perform a vital function in the proper operation of the Ford tractor engine Liners that are actually worn or damaged will cause excessive wear of related engine parts 4 drop in engine oil pressure and increased engine noise Therefore the matter of whether crankshaft bearing liners SHOULD or SHOULD NOT be replaced merits care ful consideration when the above engine conditions are noted or when an engine is torn down for general overhaul E The following factors should be considered in checking the condition of liners and used as guide in determining whether liners should be replaced le Clearance between the liners and the crankshaft journals This is the most important factor in checking bearings to determine whether the liners should be replaced These clearances in the Ford Tractor engine should be s follows BEARING LINERS NEW WEAR LIMIT Main 001 003 2005 Crank Pin O00l 0025 End Play 2902
96. h end plate assembly B Figure 1 insulated brushes Fig 1 F Figure 1 from the brackets D Fig ure 1 in the brush end plate b Remove the two screws G Figure 1 that hold the ground brushes C Fig ure 1 to the starter housing ill CLEANING AND INSPECTING THE STARTER Step i Thoroughly clean the armature and com mutater with a cloth and mineral spirits NOTE Avoid getting any mineral spirits on the armature windings Step 2 Check the armature windings for broken or damaged leads Step 3 Check the starter shaft bearings in the brush assembly and rear starter plate and replace if necessary Step 4 Check the brushes and replace them if they are broken or worn a Remove the damaged brush from the leads b mm MyTRac IV ASSEMB i Step 1 Position the brush plate assembly to line an aeow car SERVICING THE STARTER up the dowel hole with the dowel hole in the starter case Step 2 Hold the brushes up in the brackets by positioning the spring clips on the side of the brush Step 3 Connect the two ground brush leads to the case Step 4 Install the armature and bendix assembly in the case NOTE Make sure the fibre washer is on the end of the armature shaft Step 5 Install the two long bolts Step 6 Push the brushes down on the commutator with a small screwdriver through the starter case band opening Step 7 Install the starter case band V DISASSEM
97. han 0 005 inch for the crankpin bearings 1 REMACHINING CRANKSHAFTS Subtract the amount of undersize of the bearings to be used from the original size and remachine the crankshaft by grinding it to this new size then polish with No 320 grit polishing paper removing not more than 0 0009 inch from the diameter 2 CRANKSHAFT GEAR REPLACEMENT Remove the crankshaft gear with a puller that pulls the gear evenly fig 8 Remove the woodruff key To instal the crankshaft gear tap the woodruff key into the crankshaft and install the gear on the crankshaft with a replacer as shown in fig 9 b Flywheel Clean the flywheel fig 11 thorousHio Replace or reface a flywheel that has an excessively wor face Replace a flywheel ring gear subpar 1 bel chipped or has excessively worn teeth PES amp 121 bh MvTracrorF arom car WOODRUFF KEY CRANKSHAFT GEAR 6306 Ed CRANKSHAFT Cdi ES PULLEY 6312 Dir dcm Ue yee CRANKSHAFT RATCHET 6319 RM 585 E Fig 10 Crankshaft Assembly Disassembled 1 FLYWHEEL RING GEAR REPLACEMENT Drill a ITa inch hole nearly through the flywheel ring gear on the engine side of the gear Split the ring gear at the drilled hole with a chisel and hft the ring gear off the flywheel Clean the ring gear recess on the flywheel Heat the ring gear evenly to 360 F and place it on the cold flywheel making sure it is seated in the recess of the flywheel 2 REFACE FLY
98. he jets TOR IT fg CARBURETOR SCREW 31062 S7 Se WEE CHOKE LEVER SWIVEL 9555 RETAINER 9549 STAR WASHERS CHOKE PLATE CHOKE SHAFT AND LEVER 9546 SCREWS Ses uam P de GASKET 9608 MAIN NOZZLE 9530 RM 464 Figure 19 Carburetor Body Disassembled b Carburetor Throttle Body Replace the carburetor throttle body if it is cracked if the threads are stripped or if the throttle or choke shaft holes are worn Replace the throttle body if the float hanger fig 18 is damaged ois Throttle Shaft and Lever Replace the throttle shaft and lever fig 18 if the shaft is worn or bent if the threads are stripped or if the lever is damaged or loose on the shaft d Choke Shaft and Lever Replace the choke shaft and lever fig 19 if the shaft is worn or bent if the threads are stripped or if the lever is damaged or loose on the shaft e Choke Plate Replace the choke plate fig 19 if the poppet valve spring is weak and will not hold the poppet valve closed Replace the choke plate if the plate or poppet valve is bent or damaged f Float Replace the float fig 18 if it is leaking or if it is bent or damaged in any way g Venturi Replace the venturi fig 18 if it MrT Rar amr TT CAN aged in any way 3675 48 C 222 CARBURETOR THROTTLE BODY AT ndn n Float Position Gauge 9550 D Go Diameter 0 260 No Go Diameter 0 297 RM 444 F
99. ift lever on the top of the transmission case A view of the transmission 1s shown in Figure 88 with all the gears in neutral position It also shows the starter button shaft directly over the hole in the gear lock plate This gear lock plate hole and the starter button shaft line up only when the gearshift lever is in neutral position It is impossible to engage the starter with the tractor in gear the reason we call it a safety starter Figure 90 illustrates all the transmission parts in their relative assembly positions i Figure 89 illustrates the meshing of gears for each of the forward and reverse speeds and the path of transmitted power in order to know thoroughly the various parts of the transmission and their functions it is suggested that the reader carefully study the sectional view of the transmission together with the views illus Fig 88 Transmission Cross Section EID UIT m gc PEDRO AU JUNE J i NE TAI Wi MAEL IEN i PI s Sr FT a tl UN E rre GILT uM ji WEL EL LEM rre DIETE o pii me d LE T j ut ow a Nue Lm TP ANNE CH i A bt v Un n pt n TRANSMISSION 72003 5 i A TROR S ea H 7234 t 34075 u 34807 5 7225 S lU 1325554 5 5 i2 F 34807 EI E 7067 O n 4 34807 355545 5 O mat costs 7515 7569 cor Fig 90 Transmis
100. igure 20 Measuring Float Level 4 Cylinder Engine Carburetor h Main Nozzle Replace the main nozzle fig 19 if it 1s bent or if the threads are stripped i Main Adjustment Needle Replace the main adjustment needle fig 18 if the threads are stripped or if the valve is ridged j Main Adjustment Needle Spring Replace the main adjust ment needle spring fig 18 if it is weak or broken k Choke Shaft Spring Replace the choke shaft spring fig 19 if it is broken or weak l Float Needle and Valve Seat The float needle and valve seat are matched in sets therefore when one is at fault both must be replaced Replace both the needle and the seat fig 18 if there is any of wear on either part Economizer Jet Replace the economizer jet fig 18 if the ines are stripped or if the jet is damaged in any way n Maximum Fuel Limiting Jet Replace the maximum fuel limiting jet fig 18 if the threads are stripped or if the jet is damaged in any way o Idler Jet Replace the idler jet fig 18 if the threads are stripped or if the jet is damaged in any way p Idle Adjusting Needle Replace the idle adjusting needle fig 18 if the threads are stripped or if the valve surfo is eidee q Idle Adjusting Needle Spring Replace dw WT CTAR ABT needle spring fig 18 if it is broken T 922 n 3675 48 C car B ta CARBURETOR BODY THROTTLE BODY RM 463 Figure 21 Assembling Carburetor Body te Car
101. in all of the main bearing caps b Install Flywheel Place the fiywheel in place on the crank shaft Make certain that there is no foreign matter or burrs between the flywheel and crankshaft Install the dowel retainer and cap screws Tighten the cap screws from 65 to 70 pounds feet If self locking cap screws are used tighten from 75 to 80 pounds feet Check the flywheel runout with an indicator If the flywheel has a runout of more than 0 005 inch take the flywheel off and turn it one half turn on the crankshaft and install the dowel retainer and cap screws If the runout is still more than 0 005 inch replace or reface the flywheel Install lock wire in the four cap screws c Install Clutch Disk and Pressure Plate Block the three clutch release levers down with wooden blocks fig 47 Position the clutch disk on the flywheel and install a clutch pilot tool into the pilot bearing and disk Position the pressure plate on the fly wheel Install and tighten the six lock washers and cap screws Remove the clutch pilot tool and the wooden blocks from the pressure plate d Install Camshaft Assembly Install tt Mi IRA cylinder block being careful not to damage th 260i dT amp 131 d cTORFoROM COM RM 518 Fig 48 Timing Marks surface with the sharp corners of the cams Make sure the timing mark on the camshaft gear is in line with the timing mark on the crankshaft gear fig 48 e Install Push Rod and Valve Asse
102. ing enough clearance for a continuous film of oil between the two parts A running fit usually requires 0 001 inch for oil film plus a minimum of 0 001 inch for each 1 inch of diameter par f below d Press Fit A press fit is one that requires force to enter the male part into the bore Accepted practice for press fits is to have the male part larger by 0 001 inch for each inch of diameter than the bore into which it is to be pressed e Shrink Fit Generally speaking a shrink fit is tighter than a press fit The amount of the shrink ranging from 0 001 inch to 0 002 inch for each 1 inch of diameter and in some cases even more The parts having a press fit may be assembled either by force or by the shrink method There are two methods of shrinking two parts to gether either one of which may be used both may be used 1n some instances One method involves expansion of the female member by heating The other method involves contracting the male member by chilling with dry ice or liquid air f Effect of Expansion on Fits Allowances are made in estab lishing fits on parts that are exposed to higher temperatures in order to provide for the anticipated expansion of the part during operation and still provide adequate clearance for the type of fit required Allowances must also be made for unequal expansion of dissimilar materials Absolute minimum allowance for expansion of parts ex posed to flame or exhaust gases pistons piston ri
103. ing this valve in five sizes for service stock each carrying its own part number and color code Lt is recommended that the exhaust valve always be fitted with a minimum of clearance Now for the first time the Ford tractor service representative has a selection of valve sizes which enables him to mske the best fit under any circumstance It is very important that the exhaust valve be properly fitted in the bushing for best operation of the hydraulic mechanism To determine this fit begin with the largest size valve and continue down the color code until the maximum valve size goes into the bushing This should give a medium tight fit This fit should be checked with the specified hydraulic oil on the valve and bushing There is little danger of getting too tight a fit as long as the exhaust valve moves uniformly throughout its travel Should you find it necessary to replace the exhaust bushing 0N 625 because of score marks be sure to install the new one with the holes in a vertioal position in the pump housing The part number size and corresponding color code of each valve is listed below Pert No Size of Valve Color Code 8N 6h0 A2 25917 5918 White 8N 6L 0 B 25918 5920 Blue 8N 6L0 C 05920 45921 Yellow 8N 6 0 D 25923 5924 Green SN 6hO E 25925 5926 Orange Ail of the valves listed above are available for immediate Hopes and should be ordered in the usual manner by individual part numbers REAR AXLE AND DRIVE Bu
104. ings which were not painted in addition the free length of the new spring is 3 shorter than the old one This new spring in no way changes previous instructions on adjusting the springs n the lift cover A length of 3 58 inches or roughly 3 37 6l inches is still correct vith Serial No 215759 on August 29 19h9 Change No h on ALL Tractors Startin Old No 8N 5ll Plunger hydraulic lift draft control spring replsced by New No 8N Shi B Plunger hydraulic lift draft control spring Both of these plungers have the same over alllength but the new one has a Larger eel head at the clevis end This provides more bearing area on plate No 8N 527 Change No 5 on All Tractors Starting with Serial No 215759 on August 29 1919 Old No NCA 527 A Plate Assembly hand lift cover Part number remains the same The only revision made was in the steel and heat treatment thus increasing its strength _ Change No 6 on All Tractors Starting with Serial No 215759 on Auzust 29 199 Old No 8N 535 Rocker hydraulic lift replaced by New No NCA 535 A Rocker hydraulic lift The old rocker has a single hole for attaching the top link The new rocker has been built up with two additional holes for the top link attachment for occasions when the draft of the implement is so light that tittle or no reaction is re gistered through the main control spring In such cases it will be possible to raise the top link into one of the add
105. inserts from becoming mixed Repeat the above procedure to remove the remaining connecting rod and nictan assemblies r T nr arne e 113 h CYLINDER BLOCK OIL PUMP DRIVE GEAR CENE OIL PUMP SCREEN COVER c 75 NA CAMSHAFT Sirk deal CONNECTING RODS fe bt as emn V on SEA OIL SUNGER A usce CONNECTING SEAR MAIN BEARING CAP RODS CRANKSHAFT GEAR Wd OIL SEAL OIL PUMP BODY ea Nav WHEEL CENTER MAIN BEARING CAP RM 505 Fig 6 Underside of Engine with Oil Pan Removed i Remove Crankshaft Remove the lock wire and castellated nuts or self locking nuts from the main bearing caps fig 7 and remove the bearing caps Lift the crankshaft from the cylinder block Fig 7 Removing Connecting Red and Pistoi CA NE amp TI 3 INSPECTION AND REPAIR Section Crankshaft and Flywheel eee 121 Cylinder Block ueesee eee eee nec ey ae 122 Piston and Connecting Rods s cece eee 123 Camshaft and Valve Mechanism 000 0000 124 Cylinder Head and Front Cover 0 0 0 0000 essen 125 OU PUM rrrrrrr 126 Water Pump 0 00 0 00000 cece er ris 127 AEMQOrovernor ee ee ara ans 128 Oi Pan Intake and Exhaust Manifolds 129 121 CRANKSHAFT AND FLYWHEEL The disassembled crankshaft and flywheel assemblies are shown in figs 10 and 11 a Crankshaft Clean out the drilled oil pa
106. inually improve our products we are pleased to announce the following changes in the 8N Tractor Change No L on All Tractors Starting with Serial No 217307 on September l 199 Old No 8N 695 42 Bushing hydraulic pump intake valve replaced by New No 8N 695 B Bushing hydraulic pump intake valve The old tushing had four intake holes and a large chamfer while the new bushing has but two intake holes and instead of a chamfer there is just a small radius to break the sharp edge The new bushing does not allow a surge of oii to reach the pistons and cause too rapid a rise in the implements SALT Le Change No 2 on All Tractors Starting with Serial No 217307 on September 1 19h9 Old No ON 696 5 Valve intake control hydraulic pump replaced by New No 8N 698 z Valve intake control hydraulic pump Ihe old valve had z short taper while the new one has a much longer one This longer tapered v lve meters the oil to the intake holes in the bushing ist 29 1919 Change do 3 on All Tractors Startin with Serial No 215759 on au Old No 8N 539 Spring draft control replaced by New No GN 539 B Spring draft control This change has been made to provide a more positive fulcrum for the long control lever 8N 51h0 thus insuring full intske position of the intake valve when cold oil would tend to resist this movement of the valve The new springs are painted red to enable them to be quickly distinguished from the old spr
107. itional positions provided to increase its leverege over the main control spring A general rule that may be followed regarding the position of the top link in the rocker is that the top hole is for light draft midi Fr bottom hole for heavy draft If an implement with h Yi link in the top hole it upsets the balance of the hy corrected by putting the top link in the bottom hole RACTORF ORUM CON Change No 7 on All Tractors Starting with Serial No 215043 on August 25 19h49 Old No 350920 6 Bolt oil seal to retainer amp cup assembly to center housing New number remains the same The revisions were made in the type of steel and the bolt is now full bodied instead of being necked down between the threads and the knurled portion The increase in body size will tend to prevent chucking of the hub The change in the steel will prevent the bolts from stretching Change No B on Ali Tractors Starting with Serial No 216989 on September 2 1949 Old No N 3512 Panel Assembly instrument replaced by New No 8N 3512 C Panel Assembly instrument The new panel has notches cut out at the bottom for the sector arms of the new Steering assembly Change No 9 on All Tractors Starting with Serial No 216989 on September 2 1919 Old No 8N 3503 Geer Assembly steering replaced by New No 8N 3503 B Gear Assembly steering In the old assembly the left hand sector was controlled from the ball nut and the right hand sector was controlle
108. iver and gently pry the new seal is installed with the open end in like all seals the choke bushing is the same MyTractorF orom com Mi ADJUSTMENT NEEDLE TE HEQTTLE PLATE J Y RETAINING HORES DLE SPEED oye nio ADJUSTMENT SCREW ON PLATE d XL SPRING A MISES Em AND LEVER ASSEMBLY IDLE FUEL 8 ADJUSTMENT go NEEDLE i adan x ae LEVER PIN OLE JET SS FLOAT VALVE SEAT GASKET b B zy TUBE FLOAT CHAMBER COVER GASKET 9 FLOAT AND LEVER ASSEMBLY BUS MAIN NOZZLE CHOKE SHAFT AND LEVER ASSEMBLY HOKE RETAINER SPRING NC echt T Headlights Starter Ammeter Button aj C ae 5 L Li B A Armature Starter n d B Ground Solenoid j C Field 6V Battery D Pulley 51 Ignition Switch cor fe 1999 Hei Fe inne yer ad by Jenzaies Ing ORR Ge the two SERVICING THE STARTER rp Il REMOVING THE STARTER FROM THE TRACTOR Step 1 Disconnect the electrical leads to the starter relay Step 2 Loosen the two long bolts until the starter assembly is free from the engine housing Step 3 Remove the starter assembly from the tractor H DISASSEMBLING THE STARTER Step 1 Eemove the two long bolts A Figure 1 step 2 Remove the armature and the bendix assembly H Figure 1 as a unit Step 3 Kemove the cover band E Figure 1 from the starter case Step 4 Remove the brus
109. ld never be washed out when overhauling the transmission Tt is desirable however when reassembling this throw out bearing to place a few drops of oil on the shaft in order to allow it to have free movement This also tends to eliminate rust and corrosion The transmission gear Part 7113 is pressed onto Lig a siete re Rit tte the countershaft Part 7111 These two parts can be separated by the use of a press Do not attempt to reassemble the transmission to the center housing unless the power take off shaft is completely removed from the tractor Figure 93 illustrates the use of two locating pins that will greatly assist in assembling the transmis sion to the center housing These locating pins also assist in holding the gasket in its correct position Fig 93 Aligning Transmission Case cor Shermanparts txt Q What is a Sherman transmission A A Sherman transmission is an auxilliary gearbox that mounts in the cavity in fro of the transmission They increase or decrease the speed of the input shaft to the transmission to provide the tractor a whole other range of speeds as a dealer installed option and came in overdrive underdrive and dual over under configurations The basic Sherman overdrive has a shift lever on the left front side of the transmission case This shifter is about a foot long with a small bend about 1 3 of the way up and is made from 1 2 rod It points upward and has
110. lletin Subject Rear Axle Spline and Hub l PROBLEM To insure tight fit of hub and rear axle In performing rear axle service operations that require the removal of a hub we have found it adventageous to always replace the hub in the same position on the rear axie spline This practice helps assure a good fit by utilizing the seat established in the original assembly of the tractor 2 PRODUCTION CHANGE will ACTORE ORDE cam are now being stamped with a punch mzrk which will enable you to always realign them in the same position 3 FIELD CORRECTION In performing rear axle service operations on trectors built prior to the above Serial number we advocate the following field procedure Before disassembling the rear axle and hub punch a similar mark on both the hub and rear axle so that in the reassembly operation you will be able to match the hub to the rear axle as it was before disassembly SIERRING Bulletin Subject Locating Marks for Adjustment of Front Wheel Toe In on the 8N Tractor Le PROBLEM Difficulty in centering the steering arm over the front axle loceting mark 2 PRODUCTION CORRECTION Beginning with tractor serial number 6N 181515 toe in marks on the front axle were moved from the axle half to a point on the spindle housing directly below the slot in the steering arm when the wheels are straight forward 3 FIELD CORRECTION Until such time as there is a reprint for the Ford Trector Operator s Manual
111. lodge between the valve face snd the valve sett are sometimes responsible for what appears to be insufficient valve clesrance The carbon does not allow the valves to completely close and in turn excessive hest is retained at the valve face which cannot be dissipated vithout contacting the valve sest When adjusting the valve tappets for proper clesr amp nces S given in Service Bulletin No 179 a uniform method of procedure is of extreme importance The proper cold clearance for setting exhaust valves is Oll to Ol 2nd for intake valves Q10 to O1 in order to specify a uniform method of checking valve clearance on the tractor the following chart is suggested VALVES QPEN VALVES TO BE CHECKED 1 Exhaust and 3 Inteke 2 Intake and Exhaust vl Intake and 2 Exhaust 3 Exhaust and lj Intake 2 Intake and l Exhaust l zxhaust and 3 Intake 3 Exhaust and h Intake l Intske and 2 Zxhaust Correct adjustment of valve clearance may be obtained oniy ii the valves indicated in the above chert are in full open position and with the engine at room temper a ture approximately 70 Fa se 075 When checking valve clearance it cannot be overemphasized that the tappet should be against the flat of the cam and not on the cam ram In some cases it has been found that the tippet zctually is not in contact vith the cam when valve Clearances are Set thus causing excessive clearance Bulletin Subject Oversize Pistons an Ring Sets Parts and
112. low dry with compressed air Scrape gasket surfaces until all pieces of old gasket are removed 1 SAFETY VALVE Replace the safety valve fig 24 if the check valve surface is ridged if the ball is worn or damaged or if the safety valve spring has taken a permanent set as shown by inability to hold the required pressure VALVE CHAMBER 622 R H EXHAUST CONTROL AEBN VALVE 640 Fire 142 b 1 3730 47 CLAMP a Ld LV mm MA ct Lam ome VALVE CHAMBER PLUGS CLAMP POWER TAKE OFF SHAFT BUSHING mer VALVE CHAMBER PLUGS SAFETY VALVE VALVE CHAMBER ibn OUTLET VALVE AES LITE te TIAM INLET VALVE PUMP BASE RM 599 Fig 22 Hydraulic Pump woodruff key on the hydraulic touch control lever shaft Install the hydraulic touch control lever on the shaft making sure that it slides freely on the woodruff key and secure it in place with a flat washer spring and nut If the woodruff key fits too tightly in the touch con tro lever and therefore cannot slide freely the spring which main tains a constant pressure on the friction disk will be ineffective Install the hydraulic touch control lever retainer Connect the posi tion control lever to the position control linkage 3 ASSEMBLE RAM CYLINDER AND PISTON Assemble the rings onto the ram cylinder piston and equally space the ring gaps around the piston Install the piston in the ram cylinder Using new gaskets three
113. mbled Connecting Rod and Piston Showing Oil Squirt Hole the piston rings Place No 1 connecting rod and piston assembly in the No 1 cylinder with the oil squirt hole in the connecting rod facing toward the front of the engine fig 52 Install a piston ring compressor on the piston rings and tap the piston down into the cylinder with the handle end of a hammer fig 53 Place one half of the connecting rod insert bearing in the connecting rod and the other half in the connecting rod bearing cap Coat the connecting rod insert bearings with a light film of oil Carefully position the connecting rod on the crankpin and install the bearing cap on the connecting rod making sure the number on the bearing cap is toward the camshaft side of the engine Make sure that the insert bearings are not jarred out of place Install but do not tighten the nuts Repeat the above procedure when instaling the other con necting rod and piston assemblies Tighten all the connecting rod nuts from 35 to 40 pounds feet and install a cotter pin in each rod D ah Fig 53 Installing Connecting Rod and Piste amp 151 f 3505 47 eee MY TRACTOR ORUM nat VP Thickness Gage ve Hammer Hande ee RM 584 Fig 54 Measuring Clearance Between Camshaft Gear and Cylinder Block nut If Marsden nuts lock nuts are used tighten them from 40 to 45 pounds feet g Install Oil Pump Cover Assembly Place the oil pimp driven gear
114. mblies Place a push rod in each push rod bore If any of the push rods stick in the bore they are too tight and must be replaced Place each valve assembly in its respective port and install the valve guide bushing retainers fig 49 Turn the camshaft until No 1 push rod is resting on the heel zof the cam fig 50 With a thickness gauge check the clearance between the push rod and the end of the valve stem fig 51 If the m siss whee E j A EE 77 Pd z v VALVE GUIDE BUSHING RETAINER 6512 Valve Lifter 6505 A jardin car Fig 49 Installing Valve Guide Bushing amp 121 e 3605 47 Fig 50 Push Rod on Heel of Cam clearance exceeds 0 012 inch intake and 0 016 inch exhaust select a longer valve or reface the valve or valve seat to decrease the clear ance If the clearance is less than 0 010 inch intake or 0 014 inch exhaust select a shorter valve or remove the valve assembly and grind the lower end of the valve stem until 0 010 to 0 012 inch intake and 0 014 to 0 016 inch exhaust is established f Install Connecting Rod and Piston Assemblies Select the piston assemblies for each cylinder as outlined in section 123 Oil ickness Gauge Fig 5I Checking Clearance Between Valve Stem rg P Am amp 131 f CONNECTING ROD ar i T 27 86150 WPA VAN emetic CYLINDER NUMBER is RM 588 Axil v pls Pad on oe Lx p Fig 52 Asse
115. mbly Lubricate all parts before assembly Install the exhaust control valve fig 27 in the exhaust control valve bushing Install the intake control valve spring washer and spring retainer in the bushing Hold the intake control valve in the bushing and install the vaive control lever fig 27 Connect the exhaust control valve to the control lever with a clevis pin and cotter pin Secure the control lever to the cover with a cotter pin Install the safety valve assembly fig 24 on the pump base Install the valve guide socket valve zxguide inlet valve inlet valve spring outlet valve outlet valve spring and valve chamber plug as shown in fig 27 Secure the valve assembly in place with the top clamp and cap screw This procedure applies to both the left and right valve chambers Install the cam block on the cam as shown in fig 26 Install a piston on each cam block mak ing sure that the narrow parts of the offset on each piston are together when the pistons are installed on the cam blocks After the pistons are assembled on the cam block the pistons may be fitted to the cylinders in a valve chamber to be sure that the pistons have been assembled correctly on the cam block Install the power take off bushing in the pump base The shoulde bushing must be installed toward the Position the pistons cam block and cam as S 142 c R740 497 MYT RACTORFORUM CAM OM 414 Fig 28 Control Spring Adjustment making su
116. n and Connecting Rod Install the piston which was previously fitted par a 1 a above for the particular cylinder to the connecting rod previously selected and having the number of that cylinder Hold the piston in place on the connecting rod Install a piston pin in the piston and con necting rod and install a piston pin retainer in each piston pin bore groove e Fitting and Installing Piston Rings Place a new piston ring in the cylinder and press it about half way down into the cyl inder bore with the bottom of a piston so the ring will be square with v5 ccc the cylinder wall Measure the ring end gap with a thickness gauge fig 23 If the gap is less than 0 012 inch remove the ring Place the ring in a jig and file it with a fine cut file until the correct gap 0 012 to 0 017 inch is established If the gap exceeds 0 035 inch an oversize Ting must be used Roll the new piston ring around its groove in the piston The top ring should roll freely and not have a clearance of less than 0 0015 inch or more than 0 0035 inch The lower rings should roll freely and not have a clearance of less than 0 001 inch or more than 0 004 1nch Install the piston ring on the pistons with a piston ring expander fig 24 Repeat the entire above procedure for each piston ring 124 CAMSHAFT AND VALVE MECHANISM The disassembled camshaft and valve assemblies are shown in figs 25 and 26 a Camshaft Thoroughly clean the cams we TTe T gle
117. ngs and valves is 0 001 inch for each 1 inch of diameter or length In anticipating the expansion of a piston to make allowances for the additional clear ance required in the cylinder 0 001 inch for each 1 inch of diameter is added In anticipating tlie expansion of a piston ring to make allowances for the additional gap required betwe P T Ten d C r piston ring 0 001 inch for each linear inch of the ae UPIPHEIS gt amp 141 f 142 FITS AND TOLERANCES CYLINDER BLOCK FIT LOCATION ORIGINAL FIT FIT WEAR TYPE OF HMME LL _TOLERANCES _ LIMIT L FIT Cylinder bore out of round so 0 003 in Cylinder bore tapez or maximum wear 0 006 in Clearance between camshaft and 0 001 in to bearing 0 002 in 0 004 in Running ixlearance between push rod and 0 0005 in to push rod bore 0 0015 in 0 003 in CONNECTING ROD AND PISTON ASSEMBLY FIT LOCATION ORIGINAL FIT FIT WEAR TYPE OF NAME TOLERANCES LIMIT FIT Connecting rod side 0 004 in to clearance 0 008 in 0 011 in Piston pin clearance in 0 0002 in to connecting rod 0 0005 in 0 0015 in Slip Piston pin clearance 0 000 in to in piston 0 0005 in 0 0015 in Light Push Piston and cylinder 6 pounds to 10 6 pounds pounds pul with to 10 a thickness pounds pull gauge 0 003 1n with a and L6 in wide thickness gauge 0 005 in and 14 in wide Top piston ring to 0 0015 in to groove side clearance 0 0030 in 0 004 1n
118. nit cover Ins S 141 c 2 S54 AT CAP SCREWS 20874 57 LOCKW ASHER 550 EA 1 S Tal d re m ony a RAM ARM 545 COVER 501 CAP SCREWS 20874 57 LOCKW ASHER 550 WASHER 551 BUSHING 531 LIFTING ARM 543 SHAFT 544 BUSHING 531 LIFTING ARM 543 RM 623 Fig 19 Hydraulic Cover and Lift Arms Disassembled 2 BUSHINGS Replace the lifting arm shaft bushings if they are scored pitted or if the inside diameter is excessively worn 3 LIFTING ARM SHAFT Replace the lifting arm shaft if it is damaged or if the bearing surface is excessively worn 4 LINKAGE Replace any linkage that is twisted bent or damaged in any way 5 RAM CYLINDER AND PISTON Replace the ram cylinder fig 20 if it is scored or if the bore is excessively worn Replace the piston rings when the cylinder is disassembled Replace the piston if it is scored or cracked RAM CYLINDER 510 Fig 20 Ram Cylinder Disassembled cen Fig 23 Removing Valve Guide Seats clamp from each valve chamber cover Remove the two spring seats outlet valve springs outlet valves inlet valve springs inlet valves valve guides and valve guide seats from each valve chamber fig 27 Remove the two valve guide seats from each valve chamber cover with a pencil as shown in fig 23 b Inspection and Repair Clean all parts thoroughly in a clean ing solvent and b
119. nkshaft with a fiber block Install the crankshaft ratchet k Install Cylinder Head Place a new head gasket on the cyl inder block Make sure there is no foreign matter either in the cylin ders or on the surface of the cylinder head or block Place the cyl inder head on the cylinder block Install and tighten the cylinder head nuts from 50 to 60 pounds feet When tightening nuts start from a centrally located nut and tighten alternately each way l Install Water Pump Position the water pump and gasket on the cylinder block and install the nuts and cap screw m Install Intake and Exhaust Manifolds Place the intake and exhaust manifold gaskets on the cylinder block studs Secure the manifold to the cylinder block with the four nuts 132 INSTALLATION OF ACCESSORIES The following instructions are based on the assumption that the various accessories are in good working order Overhaul or repair accessories before installation if required a Install Starting Motor Position the st NrTe ACTORE ORUN COM on the cylinder block and tighten the two startir _ amp 129 2 E b Install Carburetor Place the carburetor in place on the intake manifold fig 2 Install and tighten the two carburetor nuts and lock washers c Install Distributor and Spark Plug Wires Place the gasket in position on the distributor Place the distributor in position on the cylinder front cover making sure that the tang on the dis tributor shaft
120. nnect the single timing light wire to 1 spark plug terminal 2 Fig 5 and the double wire to the battery 1 Fig 5 and Fig 6 b Start the engine and check the timing and automatic spark advance The fly wheel marks should line up with the timing window pointer at various speeds as follows Tri nes a Poer a 8o Rag 4 ee MERTZ ltr S P 2 se We l2 20g zs PERS E c e et NE TE o m x car ATTACHMENT 8 Page Lof 2 INSTALLATION INSTRUCTIONS SN 10000 B Generator and 2N 100h2 Kit on 2N and 9N Tractors Foliowing is the procedure for installing the Generator SN 10000 B and the Conversion Kit 2N 10052 on N and ON Model tractors DISASSEMBLY A Remove the 8N 10000 A Generator assembly the Generator belt adjusting clamp 2N 10181 when used and the Generator cutout 9N 10505 R B Tape or cut both ends of cutout to generator armature wire yellow with black tracer which was disconnected from cutout bottom terminal and generator INSTALLATION A Install the 8N 0000 B Generator and the 2N 10181 B Generator belt adjusting clamp where used B Install where 9N 10505 B cutout was removed the 2N 10599 Mounting Bracket and 8N 10505 B Voltage Regulator Assembly C Attach the 2N 14305 wiring assembly to the 9N 12112 conduit with the four h 91A 10882 eclips D Connect the yellow lead from the original wiring assembly 9N 1hA4Ol C was connected to top terminal of cutout
121. not have the complete specifications readily available to aid them in performing these important service operatione more accurately and efficiently To make these complete specifications available to all dealer service shops immediately we have gathered it together in Attachment f which covers in detail l Proper piston fit to cylinder bore d Specifications for piston ring side clearance 3 Connecting rod alignment hl Checking crankshaft bearing clearances We are sure that you and your dealers will be heppy to receive this information and Know that if the procedures are carried out in detail satisfactory results will be obtained in the correction of excessive oil consumption and loss of power ivTpacrorF ORUN com Bulletin Subject Servicing Cast Iron Sleeves Part No 8N 6055 D As announced in Service Bulletin No 190 dated December 5 1951 cast iron Sleeves were incorporated in production effective with Tractor Serial No 8N 1 33578 Parts and Accessories Bulletin No 202 dated January 2 1952 announced the availability of the subject sleeve as a service item in Attachment 5 instructions outline the correct procedure for servicing these sleeves in the field and should be followed in detail to obtain satisfactory results Bulletin Subject Engine Valve Clearance insufficient clearance between the teppet and the valve stem is one of the primary causes for valve burning However particles of carbon that
122. nstall the switch in the cover Place the starter latch support over the threaded end of the switch and secure with a tabbed lockwasher and nut Turn one of the tabs of the washer against the nut and secure the nut in place f Single Transmission Before assembling the transmission make sure that all assemblies are clean and dry Oil is not to be added until after the bearing tension has been adjusted Install the reverse idler assembly in the housing with the gears fac ing toward the front Hold a spacer washer between the coupling and the housing and install the reverse idler shaft and lock ring Position the countershaft assembly in the transmission housing with the large gear at the front of the housing Install the countershaft front bearing retainer and gasket Hold the countershaft in position and install the power take off shift assembly together with the shim pack which was previously removed and identified Install the power take off shaft in the shift assembly Measure the torque j SPELL a 7 Em take off shaft It should be from 15 tc ak RACTORE oROM car remove shims as required to obtain thi amp 722 f i 3 nn ae FIRST AND THIRD GEAR SHIFT RAIL 7240 THIRD AND FIRST GEAR SHIFT FORK 7230 NUT 33911 S BOLT 7245 REVERSE GEAR SHIFT RAIL 7242 NUT 33911 S BOLT 7245 Wer M M w s x larg ree a lel os ee ee EH TT ET xdi ee i P X md nd Pari REVERS
123. ock 5 Clean the cylinder block of all foreign material as follows 8 amp 8 Wipe or remove as much of the abrasive material as possible b Swab each sleeve wall valve port and chamber with clean SAE 10 motor oil at least twice C Wipe the oil out of sleeves with clean rags d Wash the sleeve bores and valve chambers with hot soapy water e Flush water jackets to remove foreign material which might cause excessive wear to the water pump f Remove the rags from the crankshaft and wash the crankshaft with hot soapy g Dry the cylinder block thoroughly using compressed air 6 Reassemble the engine with reference to service Bulletin Number 182 dated October 5 195 MvTpacrorF arom com ie ATTACHMENT 7 CORRECT INSTALLATION AND TIMING PROCEDURE FOR THE Page 1 of 3 ANGLE DRIVE DISTRIBUTOR ON THE 8N FORD TRACTOR Remove 1 spark plug With ignition off place thumb or finger over the 1 spark plug hole and crank slowly until com pression is felt Fig 1 3e Continue to crank the engine until the timing mark 0 dead center on the flywheel exactly aligns with the pointer in the timing window 1 Fig 1 on the right side of flywheel housing NOTE Flywheel is calibrated from noon to 20 in two places 180 apart li Insert the distributor assembly 1 Fig 2 With the gears fully meshed the rotor should point to the right front cylinder head bolt If not remove and re engage un
124. order to keep the intake valve guide clearance to a minimum Using a valve with a stem diameter of 0 311 inch as a gauge place the valve in each half of the valve guide bushing and measure each side with a micrometer as shown in fig 29 Replace both halves of any valve guide bushing if the measurement is less than 0 6665 inch Select guides for each valve measuring each half with the valve with which it is to be used Any new guides being used and the old guides having the least wear should be u r l valves Any guide and valve combination me M RA CTORF ORUM car 0 666 inch is satisfactory for exhaust valves eee amp 194 e 1 b RMX 416 x Fig 29 Checking Valve Guide Bushing for Wear 22 ASSEMBLING VALVE ASSEMBLY Place the valve spring retainer and spring on the valve and slide both halves of the valve guide bushing in place 125 CYLINDER HEAD AND FRONT COVER Scrape all of the carbon from the cylinder head Replace a cracked cylinder head or a head where the gasket surface is warped i4 inch or more over the full length of the head Replace the head if either the threads in the spark plug holes or the water temperature gauge hole is stripped Repair any threads that are not stripped but are otherwise damaged If the threads are damaged in either the spark plug holes or the water temperature gauge hole clean up the threads with the correct size tap Replace the cylinder front cover and timing gear side cove
125. osition the tube shaft bearings do not require adjustment Proceed as instructed in pars a and b below If no adjustment is required proceed as in structed in par b only a Steering Tube Shaft Bearing Adjustment The actual adjustment of the steering tube shaft bearings requires the removal of the steering gear from the tractor 1 REMOVE STEERING GEAR Remove tbe steering wheel with a puller To remove the hood shut off the fuel at the fuel shut off valve and disconnect the fuel line to the carburetor Remove the four cap xScrews that secure the hood to the instrument panel Remove the cap Screws that secure the hood to the front axle support Remove the Intake air screen and connection Lift off the hood Remove the air cleaner tool box battery battery box and choke rod Disconnect the throttle rod at its rear end the governor compen sating spring at the housing end the starter wire at the switch end and the oil line at the oil gauge Remove the two bolts that secure the steering gear to the instru ment panel Lift the instrument panel assembly off the steering shaft but do not detach any of the wiring Remove the four bolts at the base of the steering gear and hit out the assembly 2 ADJUST STEERING TUBE SHAFT BEARINGS Remove the four cap screws that secure the steering tube to the steering gear housing Pull the steering tube upward to remove or install shims as required Shims vary in thickness and only
126. p more balls into the retainer hole Extreme care shou rreri 47777 certain that no balls are outside the regc ull ius oRFoRO 124 a 3730 47 CON RETAINERS STEERING SHAFT BALLS RETAINERS BALL NUT RM 665 RM 666 Fig 5 Removing or Installing Fig 6 Filling Ball Ball Retainer Return Guide remain in the groove between the two circuits or at the ends these balls cannot circulate and will cause ultimate failure of the steering gear It may be necessary to rotate the steering tube shaft alternately in both directions while at the same time holding the balls in place This will make it possible to completely fill the ball circuit Lay one half of the retainer on the bench and fill it with 10 balls for the circuit being filled Position the other half of the retainer over the balls plug the ends with heavy grease and insert the retainers into the retainer holes in the nut fig 6 The second ball circuit is filled in the same manner Install the retainer clamp and three screws b Installing and Adjusting Steering Tube Shaft and Sectors Position a roller bearing in the bearing race in the housing on the upper bearing race of the shaft fig 2 PMivTracrorF ORUN com Place shims on the housing to an approxi inch Hold the steering tube shaft and ball 1 E the housing with the rack teeth toward the sectors and the ball ZEE RM 668 Fig 7 Checking Steering Adjustment Hold the b
127. parts thoroughiy in cleaning fluid Discard all used gaskets and oil seals a Power Take off Adapter The adapter assembly comprises the guard shaft sleeve bearing bearing race and housing 1 GUARD Replace the guard fig 47 if it is distorted or bent repair Bearing Wedge MyTractorF orom Fig 46 Removing Power Take off Adapter 162 a 1 3730 47 3 FITTING 353027 A 3 S7 8 GUARD 230020 A feme e Y wes Jm CUP 230012 HOUSING 23001 a ns CONE m 16 O BOLT 20470 L 8 SHAFI 230014 SLEEVE 230015 LOCK WASHER 34808 87 8 RIVET 60577 S7 8 RM 645 Fig 47 Power Take off Adapter Disassembled 2 SHAFT Replace the shaft fig 47 if it is broken or if the splines are worn or damaged 3 SLEEVE Replace the sleeve if the splines are worn or dam aged 4 BEARING Replace the bearing fig 47 if any of the rollers are missing if they have flat spots or if the surfaces are pitted or corroded Separate the bearings with a bearing wedge and remove them with puller as shown in figs 45 and 46 5 BEARING RACE Replace a bearing race that is scored worn or pitted 6 HOUSING Replace the housing if it is cracked or if the threads are stripped b Power Take off Shaft Replace the shaft and bearing as sembly fig 48 if the splines are damaged if the bearing 3s scored or corroded if the bearing race is loose or if the oil and dust seal surfaces a
128. ped engine a Remove Intake and Exhaust Manifolds Remove the nuts and washers that secure the intake and exhaust manifolds to the cylinder block Lift the manifolds off the cylinder block as an assembly fig 2 b Remove Water Pump Remove the can screw and nits which secure the water pump to the cylinder bl d T Ten TITO pump from the cylinder block zx 113 b 3695 47 cor VALVE GUIDE BUSHING RETAINER f r Meg FETE deepens t MEET ar we v nts AM Tx 7e ha as ET La Hook type Remover E El o s nota ER ate ae pls sm Fer er ES y z EFEN e Ease iL TUR ee E gom RIDES EE TET f err P Q MELLE RM 635 Fig 4 Removing Valve Guide Bushing Retainer c Remove Clutch Disk Press in on the clutch release levers and install three wood wedges between the clutch release levers and pressure plate cover fig 48 Remove the six pressure plate cap screws pressure plate and clutch disk d Remove Flywheel Remove the lock wire from the four flywheel cap screws Remove the four flywheel cap screws and dowel retainer Tap the flywheel off the dowel pins with a rawhide hammer Lift the flywheel out of the clutch housing e Remove Cylinder Head Remove all the nuts that hoid the head to the cylinder block Remove the cylinder head and gasket fig 3 f Remove Valve Assemblies and Camshaft Remove the cylinder front cover fig 3 from the cylinder block
129. place the bushing remove the elbow connection from the body Working through the elbow opening drive the pin out of the fork and shaft with a small punch Remove the levers from the body Remove the bushing with an EZ out type puller fig 40 To install the bushing place the thrust washer in the body fig 37 and drive the bushing into the housing with a driver equipped with a pilot fig 41 Install the levers and fork in the body fig 36 Drive a new grooved pin in the fork and shaft Install the elbow connection in the body c Assembly and Adjustments To assemble the shaft as sembly place the four balls in position on the shaft and install the upper race fig 37 over the balls Install the thrust bearings and fork base on the shaft fig 37 Install the flat washer shims and hairpin clip fig 36 on the shaft To adjust the shaft clamp it and the driv i governor setting gauge as shown in fig 42 Th iwi tienda the washer and fork base should be 0 220 inch 7 3695 47 amp 128 c cor RM 630 Fig 42 Measuring Clearance Fig 43 Go and No Go Gauge Between Washer and Inserted Behind Governor Fork Base Lever or remove the 0 010 inch spacers as required until the correct clearance is established To install the drive shaft assembly in the body install the lever and fork in the body securing it with a grooved pin Position the drive shaft assembly in the body and install the governor bo
130. position control spring length until the position control pin contacts the cam and the position control spring adjustment bolt contacts the control arm as shown in fig 29 It will probably be necessary to hold the position control pin in contact with the cam The position control spring length should be 12345 inches plus or minus 14 inch after the adjustment has been made hg 30 Tighten the position control spring lock nut after complet ung the adjustment z After the above adjustments have been made check the position of the hydraulic touch control lever and lift arms to be sure they were not moved while making the adjustments 6 Install the hydraulic unit on the tractor making sure that the end of the control arm enters the opening in the valve control lever and that the control arm is not bent or damaged in any way during this operation Do not install the inspection plate 7 Place the position control lever in the forward position support the lower links near the raised position and place the hydraulic touch control lever at the top of the quadrant Check the position and operation of the intake control valve as follows a POSITION OF VALVE The valve should be completely open when the hydraulic touch control lever is at the top of the quadrant The valve is open when by inserting the hand in the inspection opening it is impossible to press the end of the control valve arm toward the pump face any farther iria ii
131. preciation of why the various tolerances must be adhered to Generally speak ing all bores are made to a standard size so that standard reamers plug gauges etc may be used with a plus tolerance The maximum size of the male parts is usually a standard size less the minimum clearance required for the type of fit desired The minimum size for male parts is the maximum size minus the tolerance DN a Wring Fit wring fit is the type of fit required between a bore and a plug gauge when using the plug gauge to determine the inside diameter of the bore With a wring fit it is necessary to turn or wring the plug gauge or part to force it through the bore This type of fit does not provide space for a film of oil b Slip Fit A slip fit exists when the male part is slightly smaller than the female part and involves less clearance than a running fit par c below An example of the minimum allowable clearance for a slip fit would be a piston pin that fr slowly through the connecting rod bus MyTracrorFoRUM com a vertical position In most cases exct u lll Tet L DTP ment of the parts is involved slip fits are specified when due to anticipated expansion par f below of the female part enough addi tional clearance will result to change this type of fit to a running fit par e below and provide adequate clearance for a film of oil c Running Fit A running fit is a fit provid
132. r if cracked or damaged in any way Check the gasket surface of the covers for nicks or damage and make repairs as required 126 OIL PUMP Clean all parts thoroughly and blow out all oil passages with compressed air Lift the driven gear from the pump fig 31 Press the drive gear from the driven gear and body fig 30 a Inspection and Repair Replace an oil pump body if cracked or damaged If the inside diameter of the dri A E i 0 566 inch or the outside diameter of thed IAI TIS HT than 0 560 inch replace the bushing or shaf below Replace the fibre drive gear if it is worn or if it has broken DRIVE GEAR ASSEMBL x GU A 3 peor ari s RM 528 Fig 30 Removing Oil Pump Drive Gear From Driven Gear and Body or chipped teeth Replace the driven gear if it is less than 0 560 inch long or if the teeth are worn chipped or broken Replace a broken or damaged oil pump screen cover assembly BODY ASSEMBLY 6603 DRIVE GEAR ASSEMBLY 6608 MyTracrorForom cor Fig 31 Oil Pump Disassemblec amp 126 a EN Arbor Press WE OIL PUMP DRIVEN GEAR REM Ot PUMP DRIVE GEAR RM 509 Fig 32 Pressing Oil Pump Driven Gear Onto Oil Pump Drive Gear and Shaft 1 DRIVEN GEAR SHAFT REPLACEMENT Drive the driven gear shaft from the oil pump body fig 31 To install the driven gear shaft press it into the oil pump body until the end of the shaft is flush with the outside of the oil pump
133. r riveted in place Reattach the arm assembly Part No 7HA 12273 Bulletin Subject Correction of Errors in Tractor Operator s Manuals Form No 3729450 F and 3729 50 M Ee oco Please make the following corrections on Page 10 under Ignition System Ihese corrections apply only to tractors with the angle drive distributor installation Under Distributor The specifications on lines h4 and 8 now read Initial timing degrees of crankshaft Top dead center sreaker contact spacing 0 015 Under Distributor The specifications on lines h and 8 should read Initial timing degrees of crankshaft L before top dead center Breaker contact spacing Q2l 026 Dealers should make the above corrections in the Operator s Manual during his pre delivery inspection of the Ford Tractor The text for Ignition Timing on Pages 92 93 94 and 95 of the subject manuals is correct and need not be changed Bulletin Subject Dust Shield Kit Part No BN 1 261 A for Angle Drive Distributor The subject Dust Shield Kit designed to prevent dust from entering the distributor assembly is now svailable for service investigation of premature point failures has revealed that abrasive dust and lack of cam lubrication are in many cases responsible for point failures The pre sence of dust and the absence of lubrication causes rapid wear of the fiber block and if permitted to continue the cam of the cam and weizhts assembly Part No ON 12176 will
134. rb has 3 adjustments the idle air screw on the right side of the carb the main adjustment screw on the front of the carb and the throttle adjustment screw on the left side of the carb Any adjustment is useless unless the timing is checked and correct and the plugs are clean Turn the main adjustment screw and the idle air screw in until you f eel them seat don t force them just finger pressure Back each screw out one full turn Start the engine and warm it up fully With the engine under medium to heavy load at half throttle snap the hand throttle open to full The engine should pick up the load smoothly If it coughs or stutters unscrew the main screw about 1 8 of aturn and repeat until the engine picks up smoothly The main screw adjusts gas flow not air Next set the idle speed With the hand throttle in the idle position adjust the throttle screw until the engine is running at 400 rpm Finally set the idle mixture Adjust the idle air screw in or out until the engine runs smoothly at about 400 rpm You may need to adjust the throtlle adjustment screw up or down as you do this Turn the idle air screw in or out until you find the points where it starts torun rough too rich and too lean a mixture then put the screw half way between those points Check by running under load and idling to make sure everything works as described adjust as required You have to pull that brass packing holder out use a small screwdr
135. re damaged Always replace the oil seal if it has been removed CAP 726 SNAP RING 754 BEARING 715 cove 733 SLEEVE 756 See ce eg pa daa SHAFT 725 r a CLCEDCT MvTract Fig 48 Power Take off Snarr uisassempiea wits me ert Toms arm p Torque Wrench RM 655 Fig 49 Checking Bearing Preload 163 ASSEMBLY To assemble the power take off adapter position the sleeve on the shaft and secure it to the shaft with a rivet fig 47 Install the bearing and shaft assembly in the housing with the sleeve end of the shaft towards the rear of the housing fig 47 Press the oil seal fig 47 in the bearing retainer Install the bearing retainer shims aand guard on the housing Adjust the preload to 5 to 12 pounds winches by increasing the shim pack to reduce the preload or by decreasing the shim pack to increase the preload To assemble the power take off shaft assembly press the oil seal fig 48 in the cover Press the cover assembly onto the shaft and bearing Install the rear snap ring in the cover Install the cover cap MyTracrorF ORDE 163 3730 47 Chapter 4 BELT PULLEY Section Disassembly eee eee a aas 171 Inspection and Repair 000 0000000 e eee cece uuuas 172 Assembly 0 cc ccc cee eee eee e ee nnntennenans 173 171 DISASSEMBLY Remove the filler plug fig 50 and allow the oil to drain Remove the four cap screws that secur
136. re that the shoulder on the power take off bushing is seated in the recess in the forward end of the cam Install the valve chambers and new gaskets on the pump base When installing the valve cham bers be sure that the oil holes in the valve chamber are in line with the oil passages in the pump base There are right and left hand valve chambers and it is possible to interchange them The pipe plugs should be on the same end of the pump as the control valves fig 22 143 HYDRAULIC SYSTEM ADJUSTMENTS The hydraulic pump is of precision manufacture and does not require adjustment The hydraulic unit however is composed of several subassemblies and must be carefully adjusted as outlined below a External Adjustments There are two external adjustments of the hydraulic unit They may be made with the hydraulic unit either on or off the tractor 1 ADJUSTMENT OF CONTROL SPRING Place the hy draulic touch control lever at the top of the quadrant then turn the outer control spring seat until there is no end mlaw in the onrine The preload on the control spring should b to turn the spring with a thumb and two fir 28 CONSTANT DRAFT SPRING ADJUSTMENT NUT diim CASTLE NUT UA wt 3 SELF LOCKING i d imma paa PM S m a W S nap rmm CONTROL ARM POSITION CONTROL POSITION CONTROL PIN 22 00 rr iN RUNE SPRING ADJUSTMENT BOLT v xu o 7 Bt UN POSITION CPP ee POSITION CONTROL aan a s ode SPRING LOCK NUT P
137. required bolt the ram cylinder to the hydraulic unit cover Install the piston rod 142 HYDRAULIC PUMP The disassembled hydraulic pump is shown in fig 22 a Disassembly Remove the safety valve and check valve Remove the cotter pin which secures the valve control lever to the base Remove the cotter pin and clevis pin which secure the exhaust valve to the control lever Remove the control lever Remove the four cap screws which secure each valve chamber cover fig 22 to the base With a soft hammer tap th Lift the cam and piston assembly out uud FP ACTORF ORUM M COM take off shaft bushing figs 22 and 2 ____ 222 s hfe ee a Arr R 1 A AUR INLET VALVE SPRINGS 647 606 R H VALVE GUIDES 626 OUTLET VALVE SPRINGS 646 SPRING SEATS 636 CLAMP 609 OUTLET VALVES 628 VAT ABER CAP SCREW 21442 8 INLET VALVES 629 VALVE GUIDE SEATS 627 RM 601 e Fig 27 Valve Chamber Disassembled ie 3 PISTON Replace a piston fig 26 that is scored at any machined surface 4 CAM CAM BLOCK AND POWER TAKE OFF BUSH ING Replace a cam cam block or power take off bushing fig 26 if they are scored 5 VALVE CHAMBER Replace a valve chamber fig 24 if it is cracked or if the inlet valve or outlet valve seats are rough or pitted 6 PUMP BASE Replace the base fig 22 if it is cracked if the gasket surface is nicked or damaged or if any threads are stripped Asse
138. rmine if the sleeve was properly installed If the piston or plug gauge has a tendency to stick the sleeve was buckled during installation Remove the damaged sleeve install a new sleeve and recheck it fig 15 MENT T V ICU ML Sa or rn LEM SAX TERME LM ML Coin oo WwL CY ee meee Iu AP CYUNDER OMLTTSTLULLILMSIS Tisi Mea Fig 13 Removing Cylinder Head 122 b 3695 47 a Sleeve Crushing Tool y SLEEVE Dg es oe ul T 3 r pem r Nili bid we 1 standard stud puller fig 13 To remove a broken stud indent the end of the broken stud exactly in the center with a center punch With a small drill drill into the broken stud to a depth of approxi mately two thirds of the length of the remaining portion of the stud then follow up with a larger drill The larger drill selected must leave a wall thicker than the depth of the threads Select an extractor EZ out of the proper size and insert it into the drilled hole and screw out the remaining part of the broken stud Install new stud with a stud driver Drive all studs until no threads show at the bottom of the stud d Valve Seat Insert Replacement Remove the valve seat inserts being careful not to damage the cylinder block If the counterbore is worn remachine it to obtain a 0 0015 inch to 0 003 inch press fit on the replacement insert Make sure that the counter bore is clean Pack the new insert in dry ice for at least
139. rol arm draft control linkage and position con trol linkage 3 REMOVE LIFT ARMS AND SHAFT Remove the two cap screws lock washer and the flat washer from each arm Remove the lift arms from the shaft Remove the shaft from the hydraulic unit cover Remove the ram arm and the remaining bushing from the hydraulic unit cover fig 19 b Inspection and Repair Clean all parts thoroughly in cleaning fluid Scrape off any incrustated deposits on the cover or parts It is very important that any foreign matter that might get into the oil be removed 1 COVER Replace the cover if it is cr way I41 b 1 3730 47 cor METTE oro Chapter 6 HYDRAULIC SYSTEM Section gt Hydraulic Unit l l TEREE EEE TP 141 Hydraulic Pump Xd aca dx EE PPAR 142 Hydraulic System Adjustments TC T 143 141 HYDRAULIC UNIT This section gives instructions for the disassembly inspection and repair and assembly of the hydraulic unit a Disassembly The hydraulic unit may be disassembled by subassemblies 1 REMOVE RAM CYLINDER To remove the hydraulic ram cylinder it is necessary to remove the four bolts that mount it on the hydraulic unit cover fig 17 Lift the ram cylinder off the assem bly If desired the piston rod may be removed by disconnecting it from the ram arm STARTER BUTTON 11500 SHIFT LEVER 7210 FILLER CAP 7485 ON TRANSMISSION sA COVER 7211 ATETA
140. rs for service piston as semblies 8N 6110 D 8N 6110 E 8N 6110 F PISTON ASSEMBLIES 3 2080 Dia 3 2180 Dia 3 2280 Dia 2020 0 5 030 0 5 040 0 8 3 To obtain the required piston fit to cylinder bore of 5 10 pounds pull using a 002 x 50 ribbon and the specified sleeve finish for proper ring seating the following procedure is recommended ale Use a rigid type hone and No 220 grit stones A drill with amp speed range of 250 450 R P M should be used to drive the hone The stones must be dry when used to obtain the desired cylinder sleeve finish NOTE The speed of the hone and rapidity of the stroke governs the cross hatch marks on the sleeve The cross hatch marks should intersect at approximately 90 for proper ring seating b Operate the hone through the bore 10 or 12 complete MyTpa crorF orom clean the sleeve with dry rags and recheck the piste i n iitih haem UP car ATTACHMENT 46 Page 2of2 C Repeat the above procedure until the necessary amount of material has been removed for the specified piston to bore fit CAUTION Do not use gasoline or kerosene to clean the sleeve walls after the honing operation Solvents of this type will not remove the abrasives but will further em bed small abrasive particles into the pores of the cylinder block NOTE Ifsvalve seats need refacing this should be done previous to cleaning the cylinder bl
141. s of the gauge to be used and the pounds puli for the various combinations of pistons and cylinder bores are as follows tee Piston Cylinder Bore and Gauge Pull Piston Combinations Thickness Pounds New steel sleeve new piston nha cR Worn steel sleeve new piston F WTlapud UMS Worn steel sleeve worn piston 123 a 1 a 3695 47 LE m Thickness Gauge ng pirn E Te PISTON RING RM 514 Fig 19 Checking Ring Groove Width b PisToN Pin BoRES Use a new piston pin as a gauge and insert it in the piston pin bore If the pin falls through by its own weight the pin bore is excessively worn and must be reamed and burnished or honed to accommodate an oversize piston pin par h below c PISTON RING GROOVES Check the width of the ring grooves with a new piston ring and a thickness gauge fig 19 Discard a piston if the clearance between the ring and the piston exceeds 0 004 inch 2 PISTON PINS Replace piston pins that have become worn and measure to less than 0 749 inch 3 CONNECTING RODS Replace connecting rods which have damaged studs To check the piston pin bushing for wear use a new piston pin as a gauge If any looseness is felt rebush the connecting rod par e below or fit an oversize piston pin in both the connecting rod and the piston par b below Check the connecting rods for being twisted Bent or twi
142. se gear only after serial number 245636 Regular S A R procedure is to be followed in all cases pertaining to the above HYDRAULIC Bulletin Subject 8N Tractor Hydraulic Pump Exhaust Valve Retaining Pins BN 6hl A and 8N 6N1 B 1 PROBLEM How to determine which pin to order for servicing tractors 2 TRACTORS AFFECTED 7LITZ RACTORE OPO Retaining Pin No 6ll A was used in 8N tractors 8N L thru 8N 56751 car Retaining Pin No BN 6ll B replaced Retaining Pin 8N 61 4 beginning with Tractor Serial No 8N 56752 and continuing 3 THEORY OF NEW PART Effective with Tractor Serial No 8N 6752 the design of the Exhaust Valve No BN 630 was changed as follows The holes in the end of the valve were eliminated because they were found to be a contributing factor to the problem of sticky valves This change necessitated changing the Retaining Pin No 8N 6l A hl FIELD CORRECTION When servicing the hydraulic pump on tractors below Serial No 56752 that are equipped with the old style Exhaust Vzlve No N 630 use Retaining Pin No 8N 641 A When servicing tractors over Serial No 56752 with the new style Exhaust Valve No BN 640 use Retaining Pin No 8N 6li B A Jim f T Bulletin Subject Failure of the 7h03H4 S8 Pin in the Hydraulic Lift Cover Assembly BN Tractor l PROBLEM To prevent breakage of the subject pin in new tractors e PRODUCTION QORRECTION Effective with tractor serial number 179 000 new fix
143. sembly and the oil seal Be sure to keep the shim pack intact to facilitate reassembly Lift the axle shafts from the axle housing Remove the nuts that secure the left hand axle housing to the center housing and remove the axle housing Lift the differential from the center housing fig 35 Remove the right hand axle housing from the center housing b fh a ROCKER BACKING PLATE s A HOUSING BACKING PLATE HOUSING ane ag t CRI Pj ANS a eee E E ki i s aL TUE T amp 5 pe e NA a queo St VE wmm i E LY n i i i Ate tad ns v P k eet eT cias yi ea DA Ve PS Wk A 1 LT wp Mr e i TD 4 sen weeny wanes KL E ri E l La 4 lA E Td n ue E LIED Ng H d 1 ET AD hi e igs t ie I 0c ye Ss t ZEN UM N EE BRAKE CAM SHAFT m j Us E MU CENTER HOUSING i DRIVE PINION BRAKE PEDAL o epp Fig 32 Rear Axle Assembly CON Pullar I f Fig 33 Removing Hub From Axle Place the differential assembly on a bench and remove the lock wire and eight case bolts that secure the differential gear case to the drive gear assembly Separate the two halves If necessary use a brass hammer to tap the two halves apart Remove the differential spider together with the differential pinions and thrust washers from the differential gear case fig 35 Remove the differential side gears and thrust washers p AXLE HOUSING 401
144. should follow the nine procedures as given below 1 DRIVE GEAR Replace the drive gear fig 39 par b below if it 1s chipped or worn 2 BALL BEARING BASE Replace the E IW WT T race ETT Chr 37 par b below if it is cracked or damaged 128 a 2 3695 47 LEVER ASSEMBLY 18190 ELBOW FITTING 18686 SPRING 18196 LEVER 18189 DUST SEAL 18183 i NEEDLE BEARING 18182 MA oc ail BODY 18185 one screw 485 14 8 ff raperen PIN 18224 RM 590 Fig 36 Governor Disassembled 3 LOWER RACE ASSEMBLY Replace the lower race assem bly fig 37 if the plate is pitted grooved or if the bearing is worn or damaged 4 DRIVE SHAFT Replace the drive shaft fig 37 par below if the plate is loose on the shaft or if the slots in the plate are worn BALL BEARING BASE 18191 STEEL BALLS 358081 S UPPER RACE 18188 DRE THRUST BEARING 18192 SHIM 18241 CLIP 18195 T 2 a 3 UM i u Y a pm E T 7 1 m amp Pos UE AS My ec om ud i WW FORK BASE e 18194 DRIVE GEAR a W ASHER 356430 8 STEEL BALLS iln THI P t RACTORE ORDE CAM 15222 358081 LOWER RACE AND BEARING ASSEMBLY 18186 Fig 37 Governor Drive Shaft Disassembled RM 637 RM 583 Fig 38 Driving Grooved Pin Fig 39 Removing Governor from Fork and Lever Drive Gear 5 BALLS Replace a ball that has flat spots pits or that
145. sion Assembly Parts TRANSMISSION trating the gears that are working when set at various speeds This will enable the reader to identify these parts when they are removed from the transrnission REMOVING THE TRANSMISSION To work on the transmission retnove the steering housing as shown in Figure 134 page 51 and the power take off shaft shown on page 57 Figure 152 Remove the left side inspection plate Part 721 Place rigid support under both the center housing and the transmission housing Then remove the ten bolts connecting the transmission housing to the center housing Carefully separate the two units and remove the transmission housing to a bench or stand and position it so that the parts are readily accessible DISASSEMBLING THE TRANSMISSION Fig 91 Removing Shifter Plate Figure 91 illustrates the first step Remove the gearshift support rod plate Part 9N 7225 Eemove selector rod Part 7240 RH and Part 5 7241 L H from the rear of the transmission Take care not to lose the spring Part 7234 and the ball Part 353075 F Remove shifter forks Parts 7230 and 7231 Remove transmission main shaft bearing retain er Part 7085 Figure 92 illustrates removal of main shaft Part 7061 Remove main shaft pilot bearing Part 7120 Figure 92 illustrates the shims that are used to make possible the correct bearing adjustment Your parts book lists shims of four different thicknesses and by the
146. sion includes the assembly of the sub assemblies and of the transmission itself Make sure that all parts are in a serviceable condition before assembly a Main Shaft Assembly To assemble the main shaft press the rear thrust washer and bearing on the shaft fig 11 Install the first gear 60T on the shaft with the coupling teeth facing toward the front of the shaft Install the coupling and sliding coupling on the Shaft Install the third gear 52T on the shaft with the coupling teeth facing toward the coupling Install the second 56T and fourth gears 39T on the shaft with the long end of the hubs touching each other Install the thrust washer end bearing on the shaft b Countershaft Assembly Press the bearing on the rear of the shaft fig 12 Install the power take off hub flat washer lock washer and cap screw Install the countershaft second gear 18T on the shaft with the coupling teeth facing toward the front of the shaft Press the countershaft coupling on the shaft with the sleeve end facing toward the front of the shaft Install the sliding coupling Install the fourth gear 36T on the coupling sleeve with the coupling teeth on the gear facing towards the reer nf tha shaft Deseo the countershaft gear 55T on the shaft wi MvT pac an TIT CAK facing towards the rear of the shaft Pre 3730 47 i 133 b c Reverse Idler Assembly Install the reverse idler driven gear 23 T on the reverse idler gear 23T
147. ssages in the crankshaft journals with a piece of wire Clean the crankshaft thoroughly with cleaning solvent Replace the crankshaft flange dowels if they are damaged Replace a crankshaft gear that has chipped broken or worn teeth subpar 2 below If the main journals or the crankpin journals are grooved or scored the crankshaft must be remachined or replaced subpar 1 below Light scores or scratches can be honed then polished with No 320 grit polishing paper Measure Crankshaft Gear Remover 6306 C CRANKSHAFT GEAR EN CRANKSHAFT CAN Fig 8 Removing Crank 121 a 3695 47 Crankshaft Geor Replacer 6316 C 4 3 thd S uy opa y eed m C Pai A EE E TT T E E ALLE s VE CMD OY m A ser x4Ea GM aat ANS ara of ate emu rh y ib LLLA tul ll ng IP E AP PM M ERA Y Tm Ve rtl rA ii USATE p P we TE MH p M ies Lnd CRANKSHAFT GEAR CRANKSHAFT RM 508 Fig 9 Installing Crankshaft Gear each journal diameter at a minimum of four places to determine size out of round and taper Remachine any journals that are out of round more than 0 0015 inch Remachine journals that taper more than 0 001 inch subpar 1 below Journals that are worn evenly with less than 0 001 inch taper or less than 0 0015 inch out of round need not be reground if the available bearings will provide not more than 0 003 inch clearance for the main bearings or not more t
148. sted connecting rods must be aligned figs 20 and 21 Where possible use the original connecting rod for each cylinder If any of the old rods are used in a different cylinder file off the old number Number each rod and cen as Follows Use 36a inch steel stamps for numbering the connec MrT PA CTAR Faeny CAN placing the new number in the same position as 3605 47 123 a 3 PISTON PIN PISTON PIN CONNECTING ROD n rU 4 Connecting Rod Align Gi RM 338 Fig 20 Checking Connecting Fig 21 Checking Connecting Rod for Bend Rod for Twist 4 CONNECTING ROD BEARINGS Replace connecting rod bearings that are worn pitted scored or discolored due to over heating Bearings otherwise satisfactory but with small pits need not be replaced Bearings must be replaced where pits extend to the side of the bearing and permit oil to escape Place a plug gauge a round piece of accurately ground or rolled bar stock on the inside surface of the bearing and measure the thickness of the two pieces fig 22 Deduct the thickness of the bar stock from the reading obtained to determine the thickness of the connecting rod meen bearing Replace each connecting rod bearing that measures 240 005 inch or more under its original size 17 ir b Fitting Oversize Piston Pins NOTE This procedure applies only when piston pins are to be fitted to old pistons When new pistons are used the connect in
149. ston Control Springs Mark 2 Examine the constant draft spring adjustment nut fig 29 If it is a lock nut it should be tightened until the washer bears against the shoulder If it is a standard castellated nut with a cotter pin the nut should be adjusted to give the correct length of the constant draft spring then the cotter pin can be installed The constant draft spring should be 3 58 inches long slightly over 394 inches is satisfactory as shown in fig 30 3 Examine the top of the quadrant suppor plate for locating marks as shown in fig 31 The quadrant support cap screws should be loosened locating marks aligned and the cap screws tightened If there are no locating marks remove two cap screws from the quadrant support plate loosen the two remaining cap screws and center the slot in the quadrant support plate on the cap screws as accurately as possible Replace and tighten the cap screws that support the quadrant 4 Place the position control leve 29 Move the hydraulic touch contro 730 A LT amp 143 bh 4 of 24 inch between the edge of the lever and the top end of the slot in the quadrant as shown in fig 29 5 Make sure that the control arm moves freely and is held in a horizontal position by its own weight as shown in fig 29 Loosen the position control lock nut and adjust the length of the position control spring by turning the position control spring adjustment bolt fig 30 Adjust the
150. t Kit Part No 8N 6008 Service Parts Release and Change Notice 50 h dated April l 1950 page 15 lists Part No 9N 6008 Motor Overhaul Gasket Kit REPLACED BY Part No 8N 6008 Motor Overhaul Gasket Kit Part No 9N 6008 kit now in Distributor and Dealer inventory should be used for the servicing of all tractors prior to the installation of the angle drive distributor only In addition to the gaskets there are three 6020 series Front Cover Gaskets included in the new 8N 6008 Engine Overhaul Gasket Kit so th t the kit will be universally applicable to all 8N and 9N tractors 77231 f all appear to be exactly alike tut actually ther VTTeT Td CAN one Since there are no identifying markings on the parts it is necessory to select the proper gasket to fit the engine being overhauled If there is any doubt the gasket should be matched with the mating parts on which it will be used Information on the application of these three particular gaskets is listed below 9N 5020 B Gasket Cylinder Front Cover This part is for use with all engine assemblies prior to tractor Serial No 2638 B8N 6020 B Gasket Cylinder Front Cover This part is for use on engine assemblies equipped with the angle drive distributor that may have the cast iron front and the cast iron timing gear side covers BN 6020 Gasket Cylinder Front Cover This part is used on engine assemblies equipped with the angle drive distributor usin
151. that it is seated firmly against the shoulder in the housing or steering tube To replace a sector shaft bushing remove then press the bushing from the housin MyTracrorF orom com damage the bore Press the new inner bushi ss sars muwung varra a T th fh p LRL B um RM 667 Fig 4 Aligning Ball Nut on Steering Tube Shaft it is 4 inch below the face of the hub Press the new outer bushing into the housing until it is level with or slightly below the bottom of the counterbore Line ream both bushings in place to 1 125 1 126 inches in diameter 124 ASSEMBLY Assembly should be accomplished only when inspection shows what every part is in a serviceable condition T a Steering Tube Shaft and Ball Nut Place the steering shaft on a bench and position the nut over the middle section of the worm with the ball retainer holes on top Align the ball retainer holes with the grooves in the worm on the steering shaft fig 4 Drop 20 balls into one of the retainer holes then slowly rotate the steering shaft to carry the balls away from the hole Continue dropping the balls into the hole until the ball circuit is full to the bottom of both holes or until the end of the steering shaft worm has been reached Where the balls were stopped by the end of the worm they should be held in position with a clean blunt tool while the steering shaft is rotated in the opposite direction This will make it possible to dro
152. that occur between the valve face and its mating seat cannot build up excessively or unevenly the net result being that a much better contact is maintained between the two faces which in sures proper sealing INSTALLATION The successful operation of the new valve assembly depends to a large extent on proper installation The clearance required is con trolled by the length between the face of the undercut in the valve and tip end and the depth of the cap If the cap depth is too sh a not lift the keys and springs and on the other hand if ti deep or the length between the groove face and tip is too i ance will be excessive resulting in a high wear rate and pusssuse vaivu breaks TU RR AATTEET ATTACHMENT 1 Pape 2 This clearance can readily be checked after the parts are assembled in the engine by turning the engine over until the valve is free in the lifted position It should then be free and the actual clearance can be measured by locating an indicator on the valve head and noting the reading then the valve is moved vertically This clearance can be 000 providing the valve turns freely to not over OOL maximum vertical movement RECOMMENDED INSTALLATION l Check valve guides after cleaning out the deposits and if beli mouthed or worn so that the clearance is 50 over the original factory recommendation install new guides 2 Re face cylinder seats and check with indicator 3 Inspect valves and seats
153. the Ford Logo Ferguson system plate and was painted grey This was Harry Ferguson s favorite color The 9N was quite readily accepted and became popular among farmers It marked the re entry of Ford in the small tractor market and the new Ferguson system was one of the biggest advances in tractor development The first year more than 10 000 units were sold Ford was selling the 9N at a very competitive price and manufacturers remembered how Ford had out priced the competition with the Fordson in earher years ru REA The 9N was manufactured until 1942 The war placed restrictions on raw mater erials and production almost stopped in 1942 Ford then brought out the 2N with some modifications primarily to use parts more available during the war years Ford had now moved to second place in tractor production led only by International Harvester By 1948 Ford had announced the new tractor to be called the Ford 8N with the Ferguson system Hydraulics This led to a legal suit by Harry Ferguson After a costly court battle Ferguson won the case and a settlement was made by Ford Motor Company Ferguson manufactured the Ferguson tractor for a few years and then merged with Massy Harris to become Massey Ferguson The 8N tractor proved popular and Ford remained the second largest tractor manufacturer with the 8N and the specially designed mounted implements for it The 8N when tested in 1950 produced the following results the tractor weighed 2 717
154. those of the correct thick ness must be removed or added to complete the adjustment For 3aexemple if the spring scale reading was approximately 14 pound sonly one of the thinnest shims need be removed It is better to have the bearings adjusted tightly rather than loosely because loose bear ings permit hammering and produce subsequent failure Reassemble the steering gear and check the adjustment as out lined above b Sector Adjustment If the steering wheel has been removed it must be installed temporarily to complete the sector adjustment Turn the steering wheel until the pitman arms are parallel and both point to the rear approximately 15 Hold the steering wheel in this position and feel for backlash by grasping the left mitman arm Tf no backlash is apparent no adjustment is re MrT RACTAR Paco nn ent adjust the left sector 8 121 b 3730 47J STEERING GEAR TUBE de del OIL LEVEL PLUG SECTOR SHAFT HOUSING STEERING GEAR HOUSING PITMAN ARM a DE RM 598 Fig 1 8Steering Gear Assembly Remove the four cap screws that secure the sector shaft bearing housing to the steering gear housing and turn the sector shaft bear ing housing and its metal gasket counterclockwise as viewed from the left side of the tractor to the next set of notching holes Replace and tighten the four cap screws Check the effect of the adjustment by measuring the force required to turn the steering wheel thro
155. til the proper rotor position is obtained 2 Fig 36 NOTE The breaker point gap on this distributor should be 025 ATTACHMENT 7 Page 2 of 3 5 Loosen the clamp screw 3 Fig 3 Center the adjustment slot on the eap screw 4 Fig 3 and tighten co Che cap screw 0 Position the distributor housing 7 so that the primary terminal is pointing wothe maar 1 Fig 3 77 Rotate the distributor counter sc clockwise until the breaker Points re closed Ai T Mm aL TET EI m dm see TY cc 8 Install the distributor cap connect the primary second ary and 1 spark plug wires See Fig h 2 Hold the end of 1 spark plug wire approximately 1 8 from the cylinder head or manifold with the ignition on and then slowly rotate the dis tributor housing clockwise until a spark occurs at 1 Fig h Tighten the clamp Screw 3 Fig 3 securely The spark should occur in 1 A gt J n 24 L Mv TrRacrorF orom COK ne a mam aha UN FyF n r 1 ATTACHMENT 7 Page 3 of 3 10 Install 1 spark plug and connect all spark plug wires to their respective numbers on the distributor icap 1 to 1 2 to 2 x 3 to 3 amp lj to h Dom PED A 1 ILE s pue PE a MT M EA ee 11 Check the timing and auto MEL LEM RES tn ue EE matic spark advance with E a ena MEI E timing light as shown in Fig 5 vr gel ewe a Ei a Co
156. tion the gaskets on the axle housings Remove several of the shims of the shim pack previously used on the bearing retainer and place the remainder of the pack between the brake plate and the bearing retainer Hold the brake cross shaft in position and install the brake plate and bearing retainer assembly on the axle housing Rotation of one axle shaft should now cause shims must be removed Increase the shim pack thickness in steps of approximately 0 005 inch It may be necessary to exchange thick shims for thin ones or vice versa to produce the required addition The shim thickness must be increased until the rotation of one shaft causes the other to rotate in the opposite direction By following this procedure the amount of end play in the axles will be held to the desired limits 0 002 to 0 004 inch Install the hubs seals flat washers nuts and lock rings pactar OROM COM 153 3730 47T CAP SCREWS 6 20690 S WASHER 34810 S BEARING NUT LOCK WASHER 4636M BEARING CUP 4616M PILOT BEARING 4626M_ PINION SLEEVE 4614M DRIVE PINION 4610M BEARING 4621 T BEARING CUP 4616M DOWEL PlN 72811 8 BEARING 4621 WASHER 4667 BEARING NUTS 356139 8 RM 670 Fig 41 Drive Pinion Assembly Disassembled d Axle Shaft Replace the axle shaft fig 36 if the splines or threads are damaged Replace the axle shaft bearing subpar 1 below if the rollers have flat spots or if any rollers are
157. tures for the positive location of this pin hole were incorporated in production 3 FIELD CORRECTION When the 7 03 S pin breaks it is possible for pieces of the pin and the 9N 526 rod to drop into the differential or the hydraulic pump The resulting damage is not only costly but the repair work involved is very time consuming and might leave the farmer without his tractor at a very critical time To prevent this damage in the field we strongl recommend that all undelivered tractors below serial number 179 000 in distributors and dealers stocks be check to determine whether or not the 7hO03lh 8 pin will break The procedure for this is to attach an implement to the tractor in the normal manner Raise the implement just enough to barely clear the ground so that the implement is fully supported by the tractor Next remove the cover assembly from the right hand side of the tractor and reach in with your hand and feel the pin to determine whether it is loose or tight If tight it will indicate that the pin is tzking the thrust and that a new 9N 526 should be installed Be sure to check the new 9N 526 and pin before replacing the lift cover on the tractor to in sure that there is no bind on the pin Tam MY RACTORF ORUN COM Bulletin Subject Servicing Part No GN 6hO0 A2 Hydraulic Pump Exhaust Valve Up to the present time October 19h9 the subject valve has only been avail able under one part number ON 6hO A2 We are now mak
158. type It is a highly efficient easily serviced unit which is readily adjustable to compensate for wear This steering gear has a low driver fatigue factor because of easy steering and a minimum of road shock The tractor is equipped with a four forward and one reverse gear transmission The transmission contains constant mesh helical gears assuring quiet running and providing for long life The power take off is driven from the transmission countershait A power take off adapter is available to extend the shaft when such extension is necessary for fitting certain implements The adapter meets the American Society of Agricultural Engineers specifications for a standard tractor hitch Any implement built to these standards may be hitched to the Ford tractor without the purchase of addi tional accessories The tractor hydraulic system consists of a piston pump driven directly by the power take off shaft and a self contained hydraulic unit which includes the ram cylinder and control linkage The hydrau lic pump and unit are located in the center housing and employ the transmission oil as the hydraulic fluid This design reduces the possi bility of external oil leakage and greatly reduces repair costs The belt pulley assembly is self contained and is driven by the power take off shaft The pulley assembly is easily mounted on the tractor and has a separate oil supply The differential assembly is of the heavy duty truck type and is
159. ud stuck in it holding it open This problem often starts in the gas tank where corrosion and crud builds up Sometimes it blocks the screen and you get no gas to the carb A quick fix to this is to blow air through the gas line and clear the blockage If the crud gets to the needle valve and blocks it open you have the constant flooding problem If the last guy tried to fix the flooding problem and put a slight bend in the float it hangs up and won t shut the valve Remove the carb and clean the outside of it with lacquer thinner This will remove all of the old varnish and grease Soak it in a cut off plastic jug and brush at the bad spots every f ew minutes W hen it s clean remove the four screws that hold the carb body to the throttle body Discard the old gasket remove the float and venturi brass neck Pay attention to venturi orientation Check the throttle shaft and choke shaft for looseness f they allow air to pass around the shaft performance suffers and you should replace the seals Completely disassemble the carb and soak it to remove deposits use a water based solvent that comes in a gallon can and has it s own parts basket Available in auto parts stores for about 10 1f you are just replacing the float valve you may choose to bypass this step Always replace the float valve needle and seat It only costs af ew bucks why not Use the solid metal needle rather that the neoprene tipped type it seals better Check the flo
160. ugh the straight ahead position with the pitman arms parallel This measurement is taken with a spring scale as described above Two to three pounds should be required to maintain the steering wheel in motion through the straight ahead position It is usually necessary to adjust the right sector if the left has been moved Proceed as instructed for the left sector except that the right sector shaft bearing housing must be turned in a clockwise direction as viewed from the right side of the tractor to remove excessive back lash 2 14 to 6 pounds should be required to maintain the steering gear in motion through the straight ahead position after both right and left sectors have been adjusted 122 DISASSEMBLY To disassemble the steering gear remove the nut that secures each pitman arm to the sector shafts Remove each pitman arm with a puller Remove the four cap screws that secur i UM housing to the steering gear housing Lift each s Lati RA CTORF ORUM COM thrust washer gasket and sector shaft from the 2739 47 amp T1525 B BEARING CUP 3552 COVER AND TUBE ASSEMBLY 3509 ROLLER BEARING 357 SEAL 3570 BEARING CUP 3552 NUT 3539 SPRING 3520 ROLLER BEARING 3571 NN XN BALL RETAINERS V STEERING SHAFT 3524 BALLS 353110 5 CLAMP 34905 5 U RM 605 M Fig 2 Steering Tube Shaft Disassembled aT P BEARING 3517 SPRING SEAL 3518 HOUSING 45
161. ul not to lose the interlock ball and spring Lift out the shift fork 5 TRANSMISSION COVER Slide the shift lever rubber boot up on the lever Remove the starter switch Compress the gearshift lever spring and remove the horseshoe type spring retainer Pull up on the gearshift lever and by turning it 9 p 1 E bly Tilt the safety latch plate and remove PivTracrorF orom fig 15 Drive the pin from the gearshift 1 oo OS Oe bh 5 1710 47T CAM 132 INSPECTION AND REPAIR Inspection of the transmission must cover the following 9 items a Gears Replace all gears which have broken or chipped teeth or broken splines Replace gears that rotate on a shaft and the inside diameter is excessively worn b Shafts Replace a shaft that has broken or damaged splines or teeth Replace a shaft if the bearing surface is scored or excessively worn c Bearings Replace a bearing if it is scored or pitted or if any rollers are missing d Bearing Cups Replace any bearing cups that are scored or _ pitted e Thrust Washers Replace cracked or broken thrust Washers f Bearing Retainers Replace cracked or damaged bearing Tetainers g Shift Forks Replace damaged or broken shift forks or one on which the threads are stripped h Shift Lever Replace a damaged shift lever i Transmission Cover Replace the transmission cover if it is damaged or if the bracket rivets are loose 133 ASSEMBLY Assembly of the transmis
162. y For Model 519 3 or 10A700B 1 Consists of Items 24 26 27 amp 28 2d o4 9009 10A733 Ball Bearing 1 20 5190095 E201A1I96 Snap Ring L 29 5190060 10A139 Main Oil Seal 1 30 5190934 104907 oupport For Model 519 155 DE 1201 1 Assy 5190936 10A910 Support Assy For Model 519 155 or 1201 1 Consists of Items 29 30 amp 37 31 5190045 10A702 Support For Model 519 3 or 10A700B al Assy 5130101 10A765 Support Assy For Model 519 3 or 10A700B 1 Consists of Items 29 31 37 32 5190109 10A715A Shifter Rod 2 23 5190070 10A709 Shifter Finger 2 34 5190104 10A768 Drilled Head Set Screw 2 J3 5190103 104767 1 16 Dia Wire om a 2 36 5190096 10A743 Support Gasket i s s p a s L 37 gt Obtain locally Soc Set Screw l 20 x 142 i m ue dp s 3 3B 5195151 10A792 Sim 2002 x oe ux ESQ 2 es eo C9 Ee 9 As req 38 S193152 10A793 Chi QUT 2 a x uw Uwe g oW 18 5 amp ww o ow 2 he IB 3 5193154 ASDIAS S Soc Head Bolt 2 9 L6 x 7 98 5 40 21441 S7 304705 S Hex Hd Bolt 7716 J4 x 1 1 8 HiT 4 41 5190064 10A703 Mounting Flange L 42 5190476 54B358 Dowel Pin z 43 5190076 10A716 Inter lock j x eee amp xbe amp il 44 94190939 10A908 Clutch Release Eine For Model 519 155 2 or 1201 45 o501909 5 AJ02AT 0 Soc Hd Set Screw 3 8 16 x 3 8 1 46 9190929 10A909 Hand Shift Rod Por Model 519 155 or 1201 BR 1 46 5190083 10A724 Hand Shift Rod For Model 519 3 or 10A700B only 1 47 34807 S 349C7 S Lockwasher 3 8 cee

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