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5047 - The Wheel Horse Manual and Documentation Website

1. 51 5 to 1 REMOVAL AND REPLACEMENT Removal These basic instructions apply to all tractors equip ped with Unidrive transmissions Deviate from them as necessary for any particular tractor Remove mid mounted or trailing attachments or hitches which might interfere with transmission re moval Support the tractor frame ahead of the trans mission just enough that the rear wheels no longer carry any weight Remove the R H foot rest if so equipped belt guard and belt Disconnect the brake rod or remove the brake band from the anchor bracket On most models remove the fender and seat assembly if necessary to gain clearance remove the dust cover and instruction plate located just ahead of the shift lever Remove two cap screws that fasten through the bottom of the tool box into the top of the transmis sion Remove four cap screws that go through the frame butt plate into the front of the transmission Lower the front of the transmission guide the shift lever down between the frame rails and roll the transmission and wheel assembly free of the tractor Drain lubricant remove wheels and clean trans mission as necessary before disassembling Installation NOTE t is recommended that two pilot studs be used to facilitate transmission installation To make the studs cut the heads off of two 3 16 x 2 hex head or carriage bolts Grind a taper on the un threaded end of each bolt Screw one stud into one of the
2. POSTON OF KS FIGURE 1 i 5r 8 SPEED 10 PINION LIMITED SLIP DIFFERENTIAL Used in 5073 Transmission ITEM NO DESCRIPTION E 3 30 Snap Ring 3 74 R H End Cap 3 74 L H End Cap 3 76 Ring Gear 3 77 Axle Gear 3 78 Differential Pinion Gear 3 79 Thrust Washer 3 80 Body 3 81 Roll Pin 3 82 Spring 3 86 R H Axle 3 86 L H Axle MOTE See Service Bulletin number 252 for conver sion of limited slip differential to 8 pinion differential 8 SPEED 4 PINION DIFFERENTIAL 1 AXLES Used in 5086 Transmission 3 22 3 229 ITEM NO DESCRIPTION __ 3 22 Differential Case 3 23 Ring Gear 3 24 Differential Pinion Gear 3 27 Axle Gear 3 29 Axle 3 30 Snap Ring E i 8 SPEED 8 PINION DIFFERENTIAL 1 1 8 AXLES Used in 5091 103907 103916 amp 103918 Transmissions ITEM NO DESCRIPTION 4 19 Differential Case 4 20 Axle 4 22 Snap Ring 4 24 Axle Gear 4 25 Ring Gear 4 27 Differential Pinion Gear 8 SPEED TRANSMISSION 8 SPEED TRANSMISSION ITEM NO DESCRIPTION 3 10 3 11 3 12 3 13 3 14 3 15 Wow NN O on bh h hh ho bb B C C C C C9 W CO C0 CO CO si OO zl Ch Un P 0n si OH si OO sl Ch GAWD SE Qopoboo e ED O O O OO O O v QU 109 09 C9 C9 CO CO C9 CO NAA GOOD OO O 9 OO NAW 900N CD bk GAMM WW CO WW Ww e NNN ff Case RH Case LH Ball Bearing 14 I
3. Disassembly 1 Drive the roll pins from the end of the differ ential pins remove the pins early models used roll pins at each end of the differential pins and remove the spider gears See Figure 1 FIGURE 2 3 Lift the axle gears out of the case Remove the Woodruff keys from the axles Cleaning Inspection Parts Replacement Thoroughly clean all parts and inspect for damage and wear Use a suitable arbor when replacing bush ings If replacement of the differential case or gear is required refer to Service Note 5 Page 12 Figure 3 shows a breakdown of the entire differ ential assembly FIGURE 1 z 2 Drive the roll pins out of the axles and pull the L axles from the axle gears See Figure 2 FIGURE 3 10 5003 5010 DIFFERENTIAL 2 Place the spider gears in position as shown in Figure 6 slide the differential pins into position Assembly through the spiders and secure with roll pins NOTE The spiders must be placed in position as shown and the diagonally opposite spiders should be in the same direction Check for prop er operation 4 m ER lt a FIGURE 4 1 To assemble the differential see breakdown Fig ure 4 place the axle gears in the differential case insert the Woodruff keys in the axles slide the axles into the axle gears and drive in the retaining roll pins Figure 5 shows the axles gears and roll pins assembled if the axles will
4. ft Ibs 5 Using a Mel punch to move the high low range abs Vati shift lever check the operation of the detent and fork assembly FIGURE 13 6 Lift up on the reduction gear ois De ape input 10 Install the 2nd and high shift rail and fork as shaft thrust washer into position Figure 12 sembly the one with the unequally spaced detent 1 grooves together with the 2nd and high sliding p gear the smaller of the two sliding gears The sliding gear fits down over the input shaft with the shift fork groove up 11 Install one of the stop balls stop spring and stop pin into the detent passage FIGURE 11 Trapen Lor at Sau FIGURE 14 12 Install the 2nd stop ball and using a punch push the ball in against the spring Move the installed shift rail into the neutral position and continue to push on the punch Figure 14 until the ball is flush with the shift rail bore At the same time insert the low and reverse shift rail and fork assembly together with the low and reverse sliding gear Figure 15 removing the FIGURE 12 punch as the shift rail passes the ball See de 48 14 15 16 17 18 19 20 tent drawing Figure 17 Note The low and re verse gear fits down over the input shaft with the shift fork groove down FIGURE 15 Install the splined pinion gear Shift the 2nd and high shift rail and fork assem bly into 2nd speed position Install the large pini
5. 1 42 3528 Gear Reduction Pinion 1 1 1530 Bearing Needle 1 LD U 43 3527 Gear Reduction 1 12 1531 Bearing Needle 24 J D 1 44 3910 Shaft Cluster Gear 1 13 1232 Seal Oil 1 Shaft Brake 1 45 937014 Key 9 Woodruff 2 14 2822 Case Differential R H 1 46 4204 Gear Reverse Idler 1 15 6446 Case Differential L H 1 47 1516 Bushing Bronze L I D 1 16 2821 Gear Differential Bull 1 48 3909 Shaft 1 17 2820 Gear Axle 2 49 4166 Gear Brake Shaft 1 18 2819 Gear Differential Pinion 2 50 3902 Drum Brake 1 19 2828 Washer Thrust 2 51 937022 Key 15 Woodruff 1 20 2826 Block Differential 2 52 4437 Ass y Brake Band amp Lining 1 21 2827 Shaft Differential Pinion 1 53 908002 4 Bolt Hex 20 x 2 22 6450 Axle Rear R H 1 54 920081 4 Lockwasher J4 Dia 2 23 6451 Axle Rear L H 1 55 943460 Plug Pipe 24 933217 Roll Pin Y4 x 1 2 56 943420 Plug 34 Pipe 1 25 908043 4 Bolt Hex 16 x 3 5 57 3912 Gasket 1 26 920156 4 Washer Internal Shakeproof Dio 4 58 908038 4 Bolt Hex 34 16 x 2 5 27 5176 Gear Input 1 59 915113 6 Nut Hex 26 16 Nylok 6 28 1518 Bearing Needle LD 2 60 5632 Ass y Shift Stick 1 29 5173 Gear Hi amp 2nd 1 61 1239 Set Screw Dog Point 20 x 1 30 5174 Gear Low amp Reverse 1 62 915111 6 Nut Hex 4 20 Nylok 1 31 5175 Gear Pinion Splined 1 63 3577 Boot 1 32 936131 Snap Ring 1 Shaft 1 64 1001
6. 700 1 3745 1 374 5053 Ii Raider 10 1 6041 5071 TT Raider 12 1 6241 5071 Il 1970 Raider 10 1 6051 5073 y Raider 12 1 6251 5073 v Raider 12 1 6253 5073 v 1971 Workhorse 800 1 0100 5080 Iv Raider 10 1 0300 5073 M Raider 12 1 0310 5073 y 1972 Raider 8 1 0330 5086 y Raider 10 1 0301 5086 v Raider 12 1 0311 5073 v Raider 14 1 0320 5073 v Commando 800 1 0110 5085 IV 1973 8 HP Eight Speed 1 0370 5086 y 10 HP Eight Speed 1 0360 5086 v 12 HP Eight Speed 1 0350 5073 V 14 HP Eight Speed 1 0340 5073 V 8 HP Four Speed 1 0120 5085 IV 1974 B 80 4 Speed 1 0140 5080 5084 IV C 100 8 Speed 1 0390 5091 Y C 120 8 Speed 1 0353 5091 d C 160 8 Speed 1 0380 5091 d 1975 B 80 4 Speed 1 0141 5084 IV C 100 8 Speed 1 0391 5091 Y C 160 8 Speed 1 0381 5091 v Up dote 5048 to 5053 with 7168 kit TRANSMISSION USAGE YEAR TRACTOR MODEL VIN NUMBER 1976 B 60 8 Speed 61 07K801 B 80 8 Speed 61 08K801 61 08K802 amp 61 08K804 B 80 8 Speed 61 08K803 B 100 8 Speed 61 10K801 61 10K802 amp 61 10K804 B 100 8 Speed 61 10K803 C 120 8 Speed 61 12K801 61 12K802 amp 61 12K804 C 120 8 Speed 61 12K803 C 160 8 Speed 61 16K801 61 16K802 amp 61 16K804 C 160 8 Speed 61 16K803 1977 B 60 8 Speed 71 07K80 B 80 8 Speed 71 08K801 B 100 8 Speed 71 10K801 C 120 8 Speed 71 12K801 C 160 8 Speed 71 16K801 amp 71 16K802 1978 C 81 8 Speed 81 08K80 C 101 8 Speed 81 10K801 C 121 8 Speed 81 12K801 C 141 8 Speed 81 14K801 C 161 8 Speed 81 16K801 C
7. DI 3528 Gear Reduction Pinion T 52 3527 Gear Reduction 1 53 3910 Shaft Cluster Gear 1 54 937014 Key 9 Woodruff 2 55 4204 Gear Reverse Idler 1 56 1516 Bushing Bronze 4 LD 1 57 3909 Shoft 1 58 4166 Geor Brake Shaft 1 59 3902 Drum Broke 1 60 937022 Key 15 Woodruff 1 61 936131 Snapring 1 Shaft 1 62 7376 Ass y Brake Band amp Lining 1 63 908002 4 Bolt Hex 20 x 2 64 920081 4 Lockwosher L Dia 2 65 943460 Plug Pipe 1 56 943420 Plug Pipe 1 67 3912 Gasket 1 68 908043 4 Bolt Hex 16 34 1 69 908038 4 Bolt Hex 3 16 x 2 5 70 915113 6 Nut 16 Nylok 6 71 943322 Nipple Pipe x 1 1 72 943003 Coupling Pipe 1 73 7418 Thrust Washer 1 74 1243 Plug 1 75 5632 Ass y Shift Stick 1 76 1239 Set Screw 4 20 x Dog Point 1 7 915111 4 Nut Hex 4 20 78 3577 Boot 79 1001 Knob 2 80 7217 Ass y Handle Shift 81 933184 Roll Pin X x 1 Not Included in No 5060 Assembly Section IV 4 SPEED UNIDRIVE DESCRIPTION The 4 speed unidrive transmission is an all gear transmission utilizing sliding gears and splined shafts for easy shifting All shafts operate on needle or ball bearings supported by the transmission case The transmission case consists of R H and L H cast iron case halves which are dowelled for alignment and bolted securely together RATIOS U Jemen PE 66 8 to 1 gZnd gear esses 42 4 to 1 3 gdear se 24 6 to 1 Revers b
8. Lift the brake shaft gear slightly and rotate the transmission case to the right and upward over the top of the input gear Position the case so that the differential ring gear is centered be tween the two seat spring bosses The case may now be removed by working it up over the dif ferential ring gear 10 Remove the differential and axle assembly the brake shaft gear and the input gear and shaft See Figure 7 Remove the input shaft seal FIGURE 7 FIGURE 8 11 To remove the reverse idler gear drive out the roll pin from the idler gear pin and remove the pin and gear See Figure 8 Early models used a roll pin at each end of the idler gear pin 12 Before removing the shift forks and shift rails mating parts should be marked or scribed so they may be reassembled properly The shift fork retaining roll pins may be removed by driv ing them out with a 4 punch inserted through the shift lever tower Remove the shift rails mak ing sure to catch the two balls spring and stop pin as they are released NOTE Although the shift forks are identical the shift rails differ The low and reverse shift rail located nearest the end of the case has three equally spaced detent grooves The high and second shift rail has two of the three detent grooves closely spaced Cleaning Inspection Bearing and Oil Seal Replacement Thoroughly clean all parts and inspect for damage and wear Use suitable arbors when replaci
9. driving it in place from the inside of the case as shown in Figure 9 3 Assemble the high and low range shift fork assembly Figure 10 by inserting the spring and ball in the detent hole Using a X punch press on the ball compressing the spring At the same time insert the detent bolt withdrawing the punch as the bolt slides in place FIGURE 12 8 Install the input shaft sliding it down through the high low range sliding gear and thrust washer Figure 13 9 Install the gear and spline assembly over the input shaft sliding the spline down through the sliding gear Figure 13 Lw Rauch DET Gola FIGURE 10 4 Position the detent bolt and shift fork so that the slot of the high and low range shift lever engages the shift fork Figure 11 and thread the bolt in place until it seats securely against the shoulder Torque the detent bolt to 12 17 ft Ibs 5 Using a X punch to move the high low range shift lever check the operation of the detent and fork assembly FIGURE 13 30 10 Install the 2nd and high shift rail and fork as sembly the one with the unequally spaced detent grooves together with the 2nd and high sliding gear the smaller of the two sliding gears The sliding gear fits down over the input shaft with the shift fork groove up 11 Install one of the stop balls stop spring and stop pin into the detent passage FIGURE 14 12 Install the 2nd stop ball and using a punc
10. fork assembly Figure 6 23 Remove the detent bolt from the shift fork being careful to catch the stop ball and spring 24 Remove the reduction gear shaft Figure 7 by driving it out toward the inside of the case and remove the reduction gear 25 Remove the high low range shift lever and shaft assembly from the inside of the case FIGURE 7 Needle Bearing Replacement If needle bearings are to be replaced they should be removed and installed with suitable arbors Cluster Gear The cluster gear may be disassembled as shown in Figure 8 Disassemble and assemble carefully to avoid damage to the Woodruff keys and bushings The cluster gear bushings may be removed and in stalled using suitable arbors FIGURE 8 Cleaning Inspection Bearing and Oil Seal Replacement Thoroughly clean all parts and inspect for damage and wear Use suitable arbors when replacing bear ings Always renew all oil seals and gaskets 29 5060 6 SPEED TRANSMISSION p Assembly 1 install the high low range shift lever Figure 9 in the hole of the right case below the shift rail supports FIGURE 11 Lift up on the reduction gear and slide the input shaft thrust washer into position Figure 12 7 Install the sliding gear into the high low range fork with the groove down Figure 12 e FIGURE 9 2 Position the reduction gear assembly in place with the large gear down and insert the reduc tion gear shaft
11. not slide freely into the axle gears place a spacer between the two axle gears which will FIGURE 6 hold them apart enabling the axles to be driven into position For installation in transmission case the Transmis sion Assembly Section Du Ae i H Li o E z T FIGURE 5 REN D em 5003 AND 5010 SERVICE NOTES 1 TRANSMISSION COVERS All 5003 production transmissions and the early 5010 transmissions were equipped with ball bearings on the brake shaft Late 5010 transmissions and replacement transmissions of both models were pro duced with needle bearings To insure receiving the correct side covers please order as follows PART NO DESCRIPTION USEO ON TYPE OF BEARING OIL SEAL 3504 RIGHT COVER ALL 3509 59 LEFT COVER 5003 1519 BALL BEARING 1234 3509 59A LEFT COVER 5003 1508 NEEDLE BEARING 1303 3509 60 LEFT COVER 5010 1519 BALL BEARING 1234 3509 60A LEFT COVER 3 5010 1508 NEEDLE BEARING 1303 2 3559 BRAKE SHAFTS A Original equipment brake shafts used in ball bearing type transmissions cannot be used with needle bearing side covers B Presently stocked brake shafts and those used in needle bearing transmissions are interchangeable To install in ball bearing transmissions use four 1197 Shim Washers between the brake shaft gear and the left side cover plate 3 SPLINE SHAFT AND MATCHING GEARS All tractors and replacement transmissions produced previous to tractor Seria
12. 1 6 Remove the pinions and remove the remaining axle shaft and gear from the case 7 The axle shaft gears may easily be removed by removing the snap rings Assembly 1 If the axle gears were removed install them on the axles and install the snap rings with the sharp FIGURE 19 side of the snap ring toward the inner end of the axle 25 Install a new plug to seal the detent passage 2 Insiall one of the axle and gear assemblies in the and drive it in flush with the case differential case and install the eight 8 pinions as shown in Figure 1 Properly installed each 26 Install the brake drum and secure with the re axle gear will mesh with four pinions taining bolt and washer 27 Install the brake band and secure with the two retaining bolts 8 PINION DIFFERENTIAL NOTE gt See Service Bulletin numbers 174 amp 273 for im portant Information on differential bolts Disassembly FIGURE 2 taini ts d x 1 Remove the four 4 retaining bolts and nuts Du d differential bull gear 2 Lift off the differential side case together with the Install the remaining axle and gear assembly in axle shaft and gear the remaining differential case 5 Position the other axle gear and differential case over the pinion shafts mesh the gears and seat the case against the ring gear 6 Center the bul gear and install the four 4 re taining bolts and nuts Tighten securely and evenly to avoid distortion
13. 103918 103916 103916 103916 103916 103916 103916 103918 5086 103916 103916 103916 103916 103916 5086 5086 5086 5086 MANUAL SECTION V lt e lt e lt cc lt cc lt ccccl lt ecccccccly lt ccccccc Section 5003 5010 TRANSMISSIONS DESCRIPTION The 5003 and 5010 transmissions are readily iden tified by their removable steel side covers which are bolted to a one piece cast iron case The transmissions are of the sliding gear type and provide three speeds forward and one speed in reverse All shafts operate on needle or ball bearings sup ported by the steel side covers The differential is of the spur pinion type On all original equipment transmissions the ring gear is an integral part of the differential case The service re placement however consists of a case and gear as sembly in which the gear is bolted to the differential case RATIOS Ist gear lor e 66 8 to 1 2nd gear ves 42 4 to 1 3rd gear 24 6 to 1 Reverse 00a ee 51 5 to 1 REMOVAL AND REPLACEMENT Removal Remove any mid mounted or trailing attachment which might interfere with transmission removal Provide some support under the tractor frame ahead of the transmission Remove the seat fender and tool box assembly if so equipped belt guard belt and clutch rod Discon nect the lift cable and remove the hitch Installation Install clutch and idler arm assembly brake rod and input pulley Insta
14. 8 Remove the six 6 3 x 16 bolts and nuts that retain the right hand and left hand cases 9 Remove the left hand case leaving all gears intact as shown in Figure 2 10 Lift out the axle and differential assembly Note If only the differential is to be overhauled the transmission section need not be further dis assembled Refer to Differential Overhaul Section 11 Shift the 2nd and high shift fork assembly up into the 2nd speed position See Figure 3 CUTER G a Bhati Znsd Ll COND g bemi p DA Sa MCINME Lat n RSE DI Sisk DERAN TO E Ocha FIGURE 3 12 Remove the cluster gear and brake shaft assem bly and the reverse idler gear and shaft 13 Remove the large reduction gear assembly NOTE Prior to 1973 models the pinion reduction gear and thrust washer was welded together and was serviced as one part Starting with the 1973 models the pinion reduc tion gear and thrust washer are serviced sepa 14 15 rately The thrust washer goes on the stub shaft next to the big gear The gear and pinion may be pressed in and out of the gear with a suitable arbor press Remove the splined pinion gear from the input shaft With a screw driver or other suitable tool remove the plug from the detent passage as shown in Figure 4 16 17 19 FIGURE 4 Place the shift forks in neutral and remove the low and reverse shift rail and fork assembly the one nearest the end of the case t
15. Cleaning Inspection Bearing and Oil Seal Replacement Thoroughly clean all parts and inspect for damage and wear Use suitable arbors when replacing bear ings Always renew all oil seals and gaskets 8 SPEED TRANSMISSION Assembly 1 Install the high low range shift lever Figure 9 in the hole of the right case below the shift rail supports FIGURE 9 2 Position the reduction gear assembly in place with the large gear down and insert the reduc tion gear shaft driving it in place from the inside of the case as shown in Figure 9 3 Assemble the high and low range shift fork assembly Figure 10 by inserting the spring and ball in the detent hole Using a X punch press on the ball compressing the spring At the same time insert the detent bolt withdrawing the punch as the bolt slides in place EE ES 7 Install the sliding gear into the high low range fork with the groove down Figure 12 8 Install the input shaft sliding it down through the high low range sliding gear and thrust washer Figure 13 ee 9 Install the gear and spline assembly over the t input shaft sliding the spline down through HSH LOW EAM g t fee the sliding gear Figure 13 FIGURE 10 4 Position the detent bolt and shift fork so that the slot of the high and low range shift lever engages the shift fork Figure 11 and thread the bolt in place until it seats securely against the shoulder Torque the detent bolt to 12 17
16. Knob 1 26 Not included in 5058 Assembly Section 5060 6 SPEED TRANSMISSION DESCRIPTION The 6 speed transmission is an all gear transmis sion utilizing sliding gears and splined shafts for easy shifting All shafts operate on needle or ball bearings supported by the transmission case which consists of R H and L H cast iron case halves dowelled for alignment and bolted securely together The transmission features high and low range se lection Low range provides an additional 4 to 1 re duction in each of the 3 speeds forward and also re verse RATIOS Gear High Range Low Range lst gear 66 8 to 1 267 2 to 1 2nd gear 42 4 to 1 169 6 to 1 3rd gear 24 6 to 1 98 4 to 1 Reverse 51 5 to 1 206 0 to 1 The 6 speed transmission also incorporates a spur gear type of limited slip differential The limited slip feature provides increased traction under those con REMOVAL AND R Removal These basic instructions apply to all tractors equipped with 6 speed transmissions Deviate from them as necessary for any particular tractor Remove mid mounted or trailing attachments or hitches which might interfere with transmission re moval Support the tractor frame ahead of the trans mission just enough that the rear wheels no longer carry any weight Remove the R H foot rest if so equipped belt guard and belt Disconnect the brake rod or remove the brake band from the anchor bracket On most Instal
17. TRANSMISSION 45 53 Description gm WW A ce eee 45 Removal A B mm 45 Installation SS WW 45 Disassembly 0 Q 45 47 Needle Bearing Replacement 47 Cluster Gear E 47 Cleaning Inspection Bearing and Oil Seal Replacement 47 Assembly MM 47 50 8 PINION DIFFERENTIAL 50 Disassembly 50 Assembly aeaa E itera 50 EXPLODED VIEWS 51 52 PARTS UIST ovo ea A pe e 53 TRANSMISSION USAGE YEAR k TRACTOR MODEL i TRANSMISSION USED MANUAL SECTION 1958 RJ 58 RJ 59 5003 l 1959 1960 Suburban 400 amp 500 5010 l 196 401 i Se i 5010 l 551 701 5007 u 1962 502 552 702 32E 32R ee 5025 T 1963 33E 33R 603 633 653 753 5025 IC 953 5045 Il 1964 34E 34R 604 654 704 5046 H i 854 5025 I 1045 5025 il 1054 5047 tk 1965 L 105 1 155 5048 cli 605 655 855 1055 5049 T 1054A 5051 T 1966 L 106 L 156 606 656 1046 5053 T 1056 856 5053 H 1967 L 107 L 157 607 657 857 5053 S T3 867 1067 1267 5060 TT 1057 1257 5058 d 1968 Lawn Ranger 1 2631 Electric 5053 7 M Lawn Ranger 1 1631 Recoil 5053 II 500 Special 1 3631 5053 n Commando 6 1 4631 5053 li Commando 8 1 4831 5053 T Raider 9 10 1 6931 1 6041 5060 TT Raider 12 1 6231 1 6241 5060 ill 1969 Workhorse
18. replacing them with cap screws Tighten all six cap screws se curely Connect brake linkage Install dust cover in struction plate fender and seat assembly drive belt belt guard foot rest etc Fill the transmission to proper level with S A E 90 gear oil Remove support from beneath tractor frame Test tractor operation E Je 5060 6 SPEED TRANSMISSION Disassembly Remove axle hubs and input pulley 2 Place the transmission assembly in a vise or suitable holding fixture as shown in Figure 1 shown with levers brake band brake drum hubs and input pulley removed BEE FIGURE 1 3 Place the shift lever in neutral and pull the shift lever rubber boot from the transmission boss Loosen the shift lever retaining lock nut and set screw and remove the shift lever Remove the roll pin and remove the high low range lever 5 Remove the two 2 brake band retaining bolts and remove the brake band FIGURE 2 12 13 14 28 Remove the brake drum retaining ring and remove the brake drum using a suitable puller as required Remove paint and burrs from both axle shafts brake shaft and the inut shaft Remove the six 6 x 16 bolts and nuts that retain the right hand and left hand cases Remove the left hand case leaving all gears intact as shown in Figure 2 Lift out the axle and differential assembly Note If only the differential is to be overhauled the transmission secti
19. reverse idler and the large pinion and reduction gear assembly and the thrust washer if used as shown in Figure 17 making sure that the flanged end on the reverse idler goes down Install the splined shaft and gear through the two splined sliding gears seating the bottom end of the shaft into the input gear bearing See Figure 18 Install the cluster gear and brake shaft assembly carefully seating it in its bearing and meshing it with its related gears Install the differential and axle assembly as shown in Figure 19 making sure that four 4 nuts are up toward the L H case FIGURE 17 9 10 CLUSTER GRAM L Das SHAFT ASIENANCN FIGURE 18 Place shift forks in neutral position and check for a free neutral and proper operation in all gears Install a new case gasket holding it in place with gasket sealer and install the left hand case Install the six 6 3 x 16 bolts and nuts and tighten all bolts evenly to avoid distortion Install the shift lever assembly and retain with the set screw and lock nut Install gear shift lever rubber boot 13 14 15 16 Ae FIGURE 19 Check again for a free neutral and operation in all gears Install the brake drum and secure with the bolt and washer Install the brake band and secure with the two retaining bolts Install a new plug to seal the detent passage and drive it in flush with the case NOTE DIFFERENTIAL OVERHAUL 4 PINION DIFFEREN
20. suitable arbors when replacing bear ings Always renew all oil seals and gaskets Assembly Place the right hand case in a vise or other suit able fixture for assembly as shown in Figure 12 FIGURE 12 4 l Install the input shaft and gear and reverse idler shaft as shown in Figure 13 2 Install the 2nd and high shift rail and fork as sembly the one with the unequally spaced detent grooves See Figure 15 FIGURE 13 40 Install one stop ball spring and stop pin Refer to detent drawing and Figure 14 o Ms e 7A A V WM L7 QV M EE FIGURE 14 Install the 2nd stop ball and using a punch push the ball in against the spring Move the 2nd amp high shift rail into the neutral position and con tinue to push on the punch until the ball is flush with the shift rail bore At the same time insert the low and reverse shift rail and fork assembly removing the punch as the shift rail passes the ball See Detent Drawing Figure 14 and 15 FIGURE 15 5 Shift the 2nd and high shift fork into the 2nd speed position and install the 2nd and high sliding gear and the low and reverse sliding gear in position on their respective forks Figure 16 Note that the shift fork grooves of the sliding gears face each other and that the smaller of the two gears is the 2nd and high gears which goes on the bottom FIGURE 16 Install the
21. the gear with a suitable arbor press Remove the 2nd and high sliding gear and the low and reverse sliding gear as shown in Figure 7 14 Place the shift forks in neutral and remove first the low and reverse shift rail and fork assembly then the 2nd and high shift rail and fork assem bly being careful not to lose the two stop balls spring and stop pin as they are released Fig AETHICTAONI Sead ure 8 e PIHION REVERSE IDLER SEAR 15 Remove the reverse idler shaft and the input shaft and gear See Figure 9 Note The reverse idler shaft may sometimes stick in the left hand case FIGURE 6 FIGURE 9 FIGURE 10 FIGURE 7 16 If itis desired to replace the case bearings they may easily be removed and installed with suit able arbors When replacing bearings they should be pressed in so that they are flush with the inside of the case as shown in Figure 10 CLUSTER GEARS SS bet Hart FIGURE 8 FIGURE 11 39 17 The cluster gear and brake shaft assembly may 3 be disassembled as shown in Figure 11 Dis assemble and assemble carefully to avoid dam age to the woodruff key and bushings The cluster gear bushings may be removed and in stalled using suitable arbors 18 With a screwdriver or other suitable tool remove the plug from the end of the detent passage Cleaning Inspection Bearing and Oil Seal Replacement Thoroughly clean all parts and inspect for damage and wear Use
22. 053 TRANSMISSION PARTS LIST When ordering ports always list Part No and nome of part Specifications subject to change without notice ltem Port No No Description No 1 3900 Case R H 32 2 1533 Bearing Ball 14 ID 33 3 1528 Bearing Needle 34 4 1508 Bearing Needle 34 ID 35 5 1532 Bearing Needle 1 LD 36 6 1529 Bearing Needle 1 D 37 7 1303 Seal Oil 34 Shaft 38 8 1232 Seal Oil 1 Shaft 39 9 3915 Pin Dowel 40 10 3901 Case LH a n 1530 Bearing Needle 1 D 2 12 1531 Bearing Needle 3 4 1 D 13 3905 Cose Differential 14 3906 Gear Differentiol Bull 5 15 4235 Geor Differential Pinion 46 16 3909 Shaft K 7 908146 Bolt Hex 518 x 3 p 18 1316 Nut Huglock Mel e 19 3904 Axle Reor 0 20 3908 Geor Axle Si 21 933217 Roll Pin x 14 22 22 3522 Gear Input 53 23 1518 Bearing Needle 5 LD 54 24 3523 Gear Hi amp 2nd 55 25 3907 Shoft Spline 56 26 3524 Gear Low amp Reverse 57 27 3526 Geor Pinion Splined dig 28 936125 Snap Ring Truorc 59 29 5615 Rail Front Shift 30 5616 Rail Rear Shift 31 3503 Fork Shift Ka Part No No Description Req d 933156 Roll Pin 4 x 1 2 3517 Ball Shift Stop 2 3518 Spring Shift Stop 1 5614 Pin Shift Stop 1 3525 Gear Cluster 1 1504 Bearing Bronze I D 2 3528 Gear Reduction Pinion 1 3527 Gear Reduction 1 3910 Shaft Cluster Gear 1 937014 Key 9 W
23. 161 Twin 8 Speed 81 16B80 1979 C 81 8 Speed 91 08K801 amp 91 08K802 C 101 8 Speed 91 10K80 amp 91 10K802 C 111 8 Speed 91 11B801 C 121 8 Speed 91 12K801 amp 91 12K802 C 141 8 Speed 91 14K801 amp 91 14K802 C 161 8 Speed 91 16K801 C 161 Twin 8 Speed 91 16B801 amp 91 16B802 TRANSMISSION MANUAL USED SECTION 5091 V 5091 V 103907 V 5091 V 103907 V 5091 V 103907 V 5091 V 103907 V 103907 V 103907 V 103907 V 103907 V 103907 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V 103916 V Eer TE TRANSMISSION USAGE YEAR 1980 1981 1982 TRACTOR MODEL C 85 8 Speed C 105 8 Speed 1100 Special C 125 8 Speed C 145 8 Speed C 165 8 Speed C 175 Twin 8 Speed E 141 8 Speed C 85 8 Speed C 105 8 Speed C 125 8 Speed C 145 8 Speed C 165 8 Speed C 175 Twin 8 Speed E 141 8 Speed GT 2500 8 Speed C 85 8 Speed C 105 8 Speed C 125 8 Speed C 175 Twin 8 Speed E 141 8 Speed GT 1142 8 Speed GT 1642 8 Speed SB 421 8 Speed SK 486 8 Speed VIN NUMBER 01 08K801 amp 01 08K802 01 10K801 01 11B803 01 12K801 01 14K801 01 16K801 01 17K802 01 14E801 01 08K802 01 10K802 01 12K802 01 14K802 01 16K802 01 17K802 01 14E801 01 11B804 OR 01 08K803 01 10K803 01 12K803 01 17K803 01 14E801 A1 114201 A1 164201 01 11BHO1 01 16KHO1 TRANSMISSION USED 103916 103916 5086 103916 103916 103916 103916
24. 3 x 16 bolts and nuts and tighten all bolts evenly to avoid distortion 22 Install the shift lever assembly and retain with the set screw and lock nut Install gear shift lever rubber boot LIMITED SLIP DIFFERENTIAL NOTE See Service Bulletin number 252 for conver sion of limited slip differential to 8 pinion differential Disassembly 1 Remove the five 5 bolts nuts and flat washers that retain the end caps to the differential ring gear Note that the nutsare on theright hand side next to the right hand end cap Note also that the right hand end cap and right hand axle are longer than the left hand end cap and left hand axle apap ben GHT AND ice Be Cat E nas Ue AXLL FIGURE 1 23 24 25 26 27 3 4 32 FIGURE 19 Install the high low range selector lever and retain with the X roll pin Recheck for a free neutral and proper operation in all gears and ranges Install a new plug to seal the detent passage and drive it in flush with the case Install the brake shaft Woodruff key and install the brake drum Install the brake drum retaining snap ring Install the brake band and secure with the two retaining bolts Remove the axles and end caps by pulling the ax les in and out to free the end caps from the roll pins Caution do not pry under the edge of the end caps id 5 a O74 FIGURE 2 Remove the ten 10 differential pinions and the c
25. 4 Remove the two 2 brake band retaining bolts and remove the brake band 5 Remove the brake drum retaining bolt and wash er and remove the brake drum See Figure 2 6 Remove the six 6 x 16 bolts and nuts that retain the right hand and left hand cases 7 Remove paint and burrs from both axle shafts brake shaft and the input shaft 8 Remove the left hand case as shown in Figure 3 97 2 10 FIGURE 2 Lift out the axle and differential assembly Figure 4 Note If only the differential is to be over hauled the transmission need not be further dis assembled See Differential Overhaul Section Shift the 2nd and high shift fork assembly up into the 2nd speed position See Figure 5 FIGURE 3 38 FIGURE 4 A CLUSTER GEAR E PEAKE SHAFT Aker LC N SECOND i HOH Sef FOS COMO LED K C FIGURE 5 Remove the splined pinion shaft and gear At the same time the cluster gear and brake shaft assembly may be removed See Figure 5 Remove the large pinion and reduction gear as sembly and the thrust washer if used and the reverse idler gear See Figure 6 NOTE Prior to 1973 models the pinion reduction gear and thrust washer was welded together and was serviced as one part Starting with the 1973 models the pinion reduc tion gear and thrust washer are serviced sepa rately The thrust washer goes on the stub shaft next to the big gear The pinion may be pressed in and out of
26. D Needle Bearing 1 I D Needle Bearing 5 I D Needle Bearing 1 4 I D Needle Bearing 34 I D Seal 5 Shaft Seal 14 Axle Dowel Pin Needle Bearing 34 I D Needle Bearing D Seal Brake Shaft Differential Case Input Shaft Thrust Washer Gear and Spline Needle Bearing 5 LD Gear and Spline Pinion Sliding Gear Reduction Gear Needle Bearing 3 I D x 4 Reduction Shaft Shift Fork Stop Ball Stop Spring Plug Detent Bolt Shift Lever Gear Hi and 2nd Gear Low and Reverse Front Shift Rail Rear Shift Rail Shift Fork Roll Pin Vj x 1 Shift Stop Pin Gear and Bearing Complete Cluster Gear Bronze Bearing 24 I D Reduction Gear Cluster Gear and Broke Shaft 9 Woodruff Key Reverse Idler Gear Bronze Bushing 14 D Shaft Nipple Dipstick Case Gasket Shift Stick Set Screw Dog Point 20 x Nut 14 20 Boot Knob Shift Handle Roll Pin X4 x Thrust Washer Gear Assembly Gear 11T Gear 44T ae WHEEL HORSE PRODUCTS INC 515 West Ireland Rood P O Box 2649 South Bend Indiana 46680 PRINTED IN U S A 0482 Revision FORM NO A 1392 P N 492 4004
27. Figure 7 Install the ten 10 differential pinions in their respective bores Refer to Figure 7 Hold the cylindrical spring with suitable pliers as shown in Figure 7 and compress the spring inserting it in the center of the pinions seating it down against the axle gear Position the differential ring gear over the body After careful alignment press the gear down over the body until it seats on the end cap Figure 8 8 With the roll pins up align the remaining body 10 Install the five 5 remaining bolts and nuts with the pinions and using a plastic hammer or placing a flat washer next to each end cap hard wood block carefully tap the body into placing the nuts on the side of the long end cap the differential ring gear until it seats against Figure 10 the other body Figure 9 FIGURE 7 FIGURE 9 A be GE FIGURE 10 9 Align the roll pins and insert the left hand axle and end cap assembly seating it in the differ 11 Torque bolts evenly to avoid distortion of the ential ring gear end caps Torque to 20 ft Ibs 44 a Gp 2 Vy Je 5060 Transmission 5060 TRANSMISSION PARTS LIST When ordering ports always list Part No and name of port Specifications subject to change without notice Por Item No No No Description Req d 1 7066 Case R H 1 2 1533 Bearing Ball 1 1D 2 3 1532 Bearing Needle 1 LD 1 4 1542 Bearing Needle 5 LD U 5 1526 Bea
28. Gear 2 27 Axle Axle Snap Ring 2 28 Input Gear 2 29 Needle Bearing 5 I D 2 30 Hi and 2nd Gear 2 31 Spline Shaft Snap Ring 2 32 Low and Reverse Gear 2 33 Splined Pinion Gear 2 34 Front Shift Rail 2 35 Rear Shift Rail 2 36 Shift Fork 2 37 Shift Stop Ball 2 38 Shift Stop Spring 2 39 Shift Stop Pin 2 40 Cup Plug 2 41 Cluster Gear 2 42 Bronze Bearing 34 I D 2 43 Reduction Gear 2 44 Cluster Gear Brake Shaft 2 45 Reverse Idler Gear 2 46 Bronze Bushing 4 I D 2 47 Gear 44 Teeth 2 48 Gear 11 Teeth 2 49 Thrust Washer 1 I D 2 52 Case Gasket 2 53 Shift Stick Assembly 2 54 Set Screw 4 20 x 2 55 Boot 2 56 Knob y y Section V 8 SPEED TRANSMISSION DESCRIPTION The 8 speed transmission is an all gear transmis sion utilizing sliding gears and splined shafts for easy shifting All shafts operate on needle or ball bearings supported by the transmission case which consists of R H and L H cast iron case halves dowelled for alignment and bolted securely together The transmission features high and low range se lection Low range provides an additional 4 to 1 re duction in each of the 3 speeds forward and also re verse RATIOS Gear High Range Low Range Ist gear 66 8 to 1 267 2 to 1 2nd gear 42 4 to 1 169 6 to 1 3rd gear 24 6 to 1 98 4 to 1 Reverse 51 5 to 206 0 to 1 REMOVAL AND REPLACEMENT Removal These basic instructions apply to all tractors equip ped with 8 speed transmissions Devia
29. MECHANICAL TRANSMISSION REPAIR MANUAL WHEEL HORSE lawn amp garden tractors FOREWORD This service and repair manual has been compiled to provide authorized Wheel Horse service personnel with the proper procedures and techniques for servicing Wheel Horse mechanical transmissions The following index lists all areas covered It is advisable to read all ot the introductory sections first to gain a proper understanding of the Wheel Horse mechanical transmission used in each model The transmission is a sophisticated piece of machinery Maintain strict cleanliness control during all stages of service and repair Even a small amount of dirt or other contamination can severely damage the components Product information and specifications are shown herein as of the time of printing Wheel Horse Products Inc reserves the right to change product specifications designs and standard equipment without notice and without incurring obligation CONTENTS TRANSMISSION USAGE CHART D SECTION 5003 5010 TRANSMISSIONS ee ee or t e Bemoval eere SER eor eterne Installation Disassembly Cleaning Inspection Bearing and Oil Seal Replacement Assembly DIFFERENTIAL OVERHAUL Disassembly Cleaning Inspection Parts Replacement Assembly Ce EE CNN ENN NEE 5003 AND 5010 SERVICE NOTES EXPLODED VIEW PARTS LIST SECTION II 5053 5058 3 SPEED UNIDRIVE Description Removal uro o din eto e LE eats Replacem
30. TIAL Two types of differential pinions are used Early type use hollow pinions with separate shafts See Figure 1 and 2 2 Late type pinions are one piece with integral shafts See Figure 1A and 2A JY Early type axles incorporate roll pin holes and use roll pins to secure the axle gears See Figure 1 and 2 2 Lote type axles incorporate snap ring grooves and use snap rings to secure the axle gears See Figure 1A and 2A Disassembly 1 Remove the four 4 retaining bolts and nuts 2 Lift off the differential side case together with fera D the axle shaft and gear FIGURE 1 TEETH LR PIECE AMONG FIGURE 1A Remove the axle shaft and gear from the case Remove the differential bull gear Note position of the four 4 pinions Adjacent pinions are installed in opposite directions which make the position of the diagonally opposite pinions the same See Figure 1 and 1A Remove the pinions and shafts on the early type and remove the remaining axle shaft and gear from the case The axle shaft gears may easily be removed by driving out the roll pins or removing the snap rings as required Figure 2 amp 2A are exploded views of the complete 4 pinion differential assembly 42 FIGURE 2 Ste MiA d i d fir mra api kal FIGURE 2A DIFFERENTIAL Assembly 1 If the axle gears were removed install them on the axles and install the retaining roll pins or snap rings as requi
31. assembly 7A Refer to step 17 if cluster is to be overhauled Cleaning Inspection Bearing and Oil Seal Replacement Thoroughly clean all parts and inspect for damage and wedr Use suitable arbors when replacing bear ings Always renew all oil seals and gaskets 18 UNIDRIVE TRANSMISSION 5053 5058 Assembly Place the right hand case in a vise or other suit able fixture for assembly as shown in Figure 13 FIGURE 13 The following steps apply to all unidrive models except 5058 and 5059 For these models follow steps 1B through 17B l install the input shaft and gear and reverse idler shaft as shown in Figure 14 FIGURE 14 2 Install the 2nd and high shift rail and fork as sembly the one with the unequally spaced detent grooves See Figure 16 3 Install one stop ball spring and stop pin Refer to detent drawing and Figure 15 19 M E we NW AN NW FIGURE 15 Install the 2nd stop ball and using a punch push the ball in against the spring Move the 2nd amp high shift rail into the neutral position and continue to push on the punch until the ball is flush with the shift rail bore At the same time insert the low and reverse shift rail and fork assembly removing the punch as the shift rail posses the ball See Detent Drawing Figure 15 and 16 FIGURE 16 5 Shift the 2nd and high shift fork into the 2nd speed pos
32. band 5 Remove the brake drum retaining ring and re move the brake drum using a suitable puller as required See Figure 2 6 Remove the six 6 x 16 bolts and nuts that retain the right hand and left hand cases FIGURE 2 7 Remove paint and burrs from both axle shafts brake shaft and the input shaft 8 Remove the left hand case as shown in Figure 3 FIGURE 3 ER EC 9 Lift out the axle and differential assembly Figure 4 Note If only the differential is to be over hauled the transmission need not be further dis assembled See Differential Overhaul Section 10 Shift the 2nd and high shift fork assembly up into the 2nd speed position See Figure 4 jme EO URS Get ED NV Prita ec f d DEFT A1 d FIGURE 4 The following steps 11 through 17 apply to all unidrive models except 5058 and 5059 For models 5058 and 5059 follow steps 1A through 7A 11 Remove the splined pinion shaft and gear At the same time the cluster gear assembly may be removed See Figure 5 FIGURE 7 14 Place the shift forks in neutral and remove first the low and reverse shift rail and fork assembly then the 2nd and high shift rail and fork assem bly being careful not to lose the two stop balls spring and stop pin as they are released Fig ure 8 FIGURE 5 12 Remove the brake shaft gear assembly and the reverse idler gear See Figure 6 13 Remove the 2nd and high sliding gear and the low and r
33. case Put the other one in the diagonally opposite lower hole Install input pulley axle hubs and wheels Move the transmission assembly into place and guide the shift lever up between the frame rails Align the pilot ce EC studs with the corresponding holes in the frame butt plate and push the transmission firmly in place against the plate Install cap screws in the top of the transmission and the open holes in the front and tighten them until snug Remove the pilot studs one at a time replacing them with cap screws Tighten all six cap screws securely Connect brake linkage install dust cover instruc tion plate fender and seat assembly drive belt belt guard foot rest etc Fill the transmission to proper level with S A E 90 gear oil Remove support from beneath tractor frame Test tractor operation UNIDRIVE TRANSMISSION 5053 5058 Discssembly These instructions apply to all unidrive models un less indicated A section applying only to specific models will be so identified 1 Remove axle hubs and input pulley 2 Place the transmission assembly in a vise or suitable holding fixture as shown in Figure 1 FIGURE 1 3 Place the gear shift lever in neutral and pull the gear shift lever rubber boot away from the transmission boss Loosen the gear shift lever retaining lock nut and set screw and remove the gear shift lever 4 Remove the two 2 brake band retaining bolts and remove the brake
34. change without notice Ref Part No Ref Part No No No Description Req d No No Description Req d xS x 3504 Right Transmission Cover 1 31 3516 Shift Rail Rear 1 2 1234 Oil Seal 2 32 933156 Roll Pin x 1 2 y 3 1519 Ball Bearing 4 33 1013 Pipe Plug 1 4 3536 Gasket Transmission 2 34 3501 Transmission Housing 1 5 1108 Pipe Plug J4 1 35 3509 Left Transmission Cover 1 6 1502 Ball Bearing 3 36 908016 4 Hex Bolt 54 18 x 54 18 7 1122 No 9 Woodruff Key 4 37 1503 Bronze Beoring 2 8 3533 Cluster Shaft 1 38 1257 Oil Seal 2 9 3559 Broke Shaft and Gear 1 39 3532 Axle 2 10 3522 Input Geor 1 40 937022 Key Woodruff No 15 4 11 1518 Needle Bearing 1 41 1517 Bronze Bearing 2 12 3523 Hi amp Second Geor 1 42 933217 Roll Pin LS x 1 2 13 3524 Low amp Reverse Gear 1 43 3502 Differential Case and Gear 1 14 3526 Splined Pinion 1 44 3535 Differential Pins 4 15 920082 4 Lockwasher X Dio 18 45 933194 Roll Pin X x 1 2 16 3521 Spline Shaft 1 46 3530 Axle Gear Differential 2 7 3528 Cluster Shaft Reduction Pinion 1 7 3531 Spider Gear Differential 4 18 3525 Cluster Gear 1 48 1001 Knob 1 19 3527 Cluster Shaft Reduction Gear 1 49 3538 Lever Shift 1 20 1504 Bronze Bearing 2 50 3577 Boot Shift Lever 1 21 1243 Cup Plug X 1 D 933168 Roll Pin Xz x X 1 22 3573 Pin Shift Stop 1 52 3514 Collar Shift Lever 1 23 3518 Spring Shift Stop 1 53 1239 Y 20 x 34 Dog Point Set S
35. crew 1 24 3517 Ball Stop 2 54 915111 6 Nut Hex 4 20 1 25 3503 Shift Fork 2 55 936125 Snap Ring Trvarc 1 26 3520 Reverse Idler Gear with Bearing 1 be 3543 Brake Band with Liner 1 27 1516 Bearing Reverse Idler Gear 1 5 3540 Brake Drum 1 28 933188 Roll Pin X x 1 6 58 920081 4 Lockwasher 4 Dia 2 29 3519 Reverse Idler Pin 1 59 908002 4 Hex Bolt 4 20 x 2 30 3515 Shift Rail Front 1 See Service Note 3 See Service Note 1 See Service Note 2 amp 4 See Service Note 5 Do CG Section Il 5053 5058 3 SPEED UNIDRIVE DESCRIPTION The 3 speed unidrive transmission is an all gear transmission utilizing sliding gears and splined shafts for easy shifting All shafts operate on needle or ball bearings supported by the transmission case The transmission case consists of R H and L H cast iron case halves which are dowelled for alignment and bolted securely together The model numbers 5053 and 5058 used in this section stand for the full line of unidrive transmis sions produced since 1961 Model 5053 covers all standard models 5007 5025 5046 5048 5049 and 5053 equipped with the spur gear differential Model 5058 covers all heavy duty models 5045 5047 5051 5059 and 5058 incorporating the bevel gear differential RATIOS lsb gear ke 66 8 to 1 2nd gear 42 4 to 1 JO ST llores 24 6 to 1 Reve eee ees 51 5 to 1 REMOVAL AND REPLACEMENT R
36. emaining axle shaft and gear from the case 7 The axle shaft gears may easily be removed by driving out the roll pins Figure 2 is an exploded view of the complete standard differential assembly ey oe FIGURE 2 STANDARD DIFFERENTIAL Assembly 2 If the axle gears were removed install them on the axles and install the retaining roll pins Install one of the axle and gear assemblies in the differential case and install the four 4 pinion shafts Install two 2 pinions with their teeth up diag onally opposite each other and install the other two 2 pinions with their teeth down diagonally opposite each other See Figure 1 Install the differential bull gear Install the remaining axle and gear assembly in the remaining differential case Position the axle and gear and differential case over the pinion shafts mesh the gears and sect the case against the ring gear Center the bull gear and install the four 4 retaining bolts and nuts Tighten securely and evenly to avoid distortion BEVEL GEAR DIFFERENTIAL Disassembly Install differential assembly in a vise the case with the threaded holes should be down Remove the four 4 bolts and lock washers and remove one of the axle shafts gear thrust washer and differential case half as an assembly See Figure Remove the bull gear differential pinion shaft differential gears and differential blocks as an assembly Slide the differential blocks a
37. emoval These basic instructions apply to all tractors equipped with Unidrive transmissions Deviate from them as necessary for any particular tractor Remove mid mounted or trailing attachments or hitches which might interfere with transmission re moval Support the tractor frame ahead of the trans mission just enough that the rear wheels no longer carry any weight Remove the R H foot rest if so equipped belt guard and belt Disconnect the brake rod or remove the brake band from the anchor bracket On most models remove the fender and seat assembly If Installation NOTE t is recommended that two pilot studs be used to facilitate transmission installation To make the studs cut the heads off of two 16 x 2 hex head or carriage bolts Grind a taper on the un threaded end of each bolt Screw one stud into one of the upper holes in the front of the transmission necessary to gain clearance remove the dust cover and instruction plate located just ahead of the shift lever Remove two cap screws that fasten through the bottom of the tool box into the top of the transmis sion Remove four cap screws that go through the frame butt plate into ihe front of the transmission lower the front of the transmission guide the shift lever down between the frame rails and roll the transmission and wheel assembly free of the tractor Drain lubricant remove wheels and clean trans mission as necessary before disassembling
38. ent Disassembly Cleaning Inspection Bearing and Oil Seal Replacement Assembly Assembly of 5058 Series with Bevel Gear Differential DIFFERENTIAL OVERHAUL Dissassembly Standard Differential Assembly Standard Differential Disassembly Bevel Gear Differential Assembly Bevel Gear Differential EXPLODED VIEW 5053 TRANSMISSION PARTS LIST 5053 TRANSMISSION EXPLODED VIEW 5058 TRANSMISSION PARTS LIST 5058 TRANSMISSION 24 25 26 Page SECTION Ill 5060 6 SPEED TRANSMISSION 27 36 Description Heleon ote yale een eat 27 Removal pred Es 27 Installation 4 42 Linde 27 Disassembly ee ee eee 28 29 Cluster Gear 2 cc cece eee eee 29 Cleaning Inspection Bearing and Oil Seal Replacement 29 Assembly 4 555 due use UI Teri 30 32 LIMITED SLIP DIFFERENTIAL 32 34 Disassembly less 32 33 Assembly ong heute RUE eR 33 34 EXPLODED VIEW ERE 35 PARTS UST 52 9 i AXE xvn 36 SECTION IV 4 SPEED UNIDRIVE TRANSMISSION 37 44 Description one Lt roms ees 37 Removal irea EUREN S 37 Installation i ree EE 37 Disassembly eee eee ee eee 37 40 Cleaning Inspection Bearing and Oil Seal Replacement 40 Assembly ease 40 41 DIFFERENTIAL OVERHAUL 42 43 gisassembly eI HE 42 Assembly 20er uo RIPE 42 43 EXPLODED VIEW 43 PARIS IS iere mn RII 44 SECTION V 8 SPEED
39. everse sliding gear as shown in Figure 7 FIGURE 8 EE 15 Remove the reverse idler shaft and the input shaft and gear See Figure 9 Note The reverse idler shaft may sometimes stick in the left hand case FIGURE 9 16 If it is desired to replace the cose bearings they may easily be removed and installed with suit able arbors When replacing bearings they should be pressed in so that they are flush with the inside of the case as shown in Figure 10 FIGURE 10 FIGURE 11 17 The cluster gear may be disassembled as shown in Figure 11 Disassemble and assemble care fully to avoid damage to the woodruff keys and bushings The cluster gear bushings may be removed and installed using suitable arbors The following steps 1A through 7A apply to Uni drive models 5058 and 5059 only 1A Remove the cluster gear assembly the brake shaft assembly and the reverse idler gear and shaft FIGURE 12 2A Remove the splined pinion gear from the input shaft 3A Plate the shift fork in neutral and remove the low and reverse shift rail and fork assembly the one nearest the end of the case together with the low and reverse sliding gear making sure to catch the stop ball as the shift rail is removed See Figure 12 4A Remove the 2nd and high shift rail and fork assembly together with the 2nd and high sliding gear 5A Remove the remaining stop ball spring and stop pin 6A Remove the input shaft and gear
40. h push the ball in against the spring Move the installed shift rail into the neutral position and continue to push on the punch Figure 14 until the ball is flush with the shift rail bore At the same time insert the low and reverse shift rai and fork assembly together with the low and reverse sliding gear Figure 15 removing the punch as the shift rail passes the ball See de tent drawing Figure 17 Note The low and re verse gear fits down over the input shaft with the shift fork groove down I TM ix NT dti e c v Ae FIGURE 15 13 Install the splined pinion gear 14 Shift the 2nd and high shift rail and fork assem bly into 2nd speed position 15 Install the reverse idler gear shaft and gear as sembly making sure the shoulder of the gear goes down Figure 16 2MD A SPLINED HIGH SHIFT ANION RAIL GEAR REVERSE e l W BA AN FIGURE 17 16 Install the brake shaft gear 31 FIGURE 18 17 Install the cluster gear assembly See Figure 18 18 Install the differential and axle assembly with the long end cap and the retaining bolt nuts down into the right hand case Figure 19 19 Recheck for proper assembly a free neutral and proper operation in all gears in both ranges Place the shift forks in neutral position 20 Install a new case gasket holding it in place with gasket sealer and install the left hand case 21 Install the six 6
41. he vise as shown in Fig placement information for each type is given in ure 1 Service Notes 1 and 2 Page 12 1 Lift the rubber shift lever boot and loosen the shift lever set screw and lock nut and remove the shift lever 2 Remove the two bolts that hold the brake band to the side cover bracket and remove the brake band 3 Remove the snap ring some models may have a set screw from the brake shaft and remove the drum using a suitable puller as required Remove the Woodruff key from the brake shaft FIGURE 4 6 Remove the spline shaft and pinion gear See Figure 4 NOTE The shaft and matching gears in some transmissions have 10 splines while later models have 11 splines For details and ordering information refer to Service Note 3 Page 12 7 Remove the bolts from the right cover and break the case loose from the cover gasket This will allow the case to shift sufficiently to let the clus FIGURE 2 ter gear assembly to be worked loose and re moved as shown in Figure 4 The cluster gear may be disassembled as shown in Figure 5 Dis assemble and assemble carefully to avoid dam age to the Woodruff keys and bushings The cluster gear bushings may be removed and in stalled using suitable arbors FIGURE 5 Lo L www Huh Seen IMT uen poem BLAN FIGURE 6 8 Remove the low and reverse and the high and second sliding gears If either gear is to be re placed refer to Service Note 3 Page 9 9
42. hift groove faces the opposite shift rail and continue to slide the rail into place making sure the de tent grooves are facing the stop ball Secure the shift fork to the shift rail with a 4 x 1 roll pin FIGURE 10 Place the right side cover in a vise Install the input gear and shaft assembly See Figure 10 Install the side cover gasket using gosket sealer to hold in position Install the brake shaft gear Install the differential and axle assembly Ser Figure 10 showing the input gear brake shaft gear and differential assembly in position 12 13 14 15 16 17 LOA FER RO GLa ep L H KE BAR FIGURE 11 Before installing transmission case make sure that it is positioned properly in relation to the right side cover This will place the shift lever tower to the front and toward you as in Figure 11 To install the case work it down over the differ ential ring gear lift the brake shaft gear slightly and seat case in position Make sure the brake shaft gear and differential assembly are seated Position the high and second sliding gear the smaller one on the lower shift fork Position the low and reverse the larger one on the up per shift fork When properly installed the shift fork grooves will be adjacent to each oth er See Figure 11 Install the cluster gear assembly See Figure 12 Install the spline shaft and pinion gear and seat in position Install the righ
43. ition and install the 2nd and high sliding gear and the low and reverse sliding gear in position on their respective forks Figure 17 Note that the shift fork grooves of the sliding gears face each other and that the smaller of the two gears is the 2nd and high gears which goes on the bottom FIGURE 17 Install the reverse idler and the brake shaft as shown in Figure 18 making sure that the flanged end on the reverse idler goes down Install the splined shaft and gear through the two splined sliding gears seating the bottom end of the shaft into the input gear bearing See Figure 19 Install the cluster gear assembly care fully seating it in its bearing and meshing it with its related gears Install the differential and axle assembly as shown in Figure 20 making sure that four 4 nuts are up toward the L H case FIGURE 18 10 12 13 14 15 20 FIGURE 19 FIGURE 20 Place shift forks in neutral position and check for a free neutral and proper operation in all gears Install a new case gasket holding it in place with gasket sealer and install the left hand case Install the six 6 2 x 16 bolts and nuts and tighten all bolts evenly to avoid distortion Install the shift lever assembly and retain with the set screw and lock nut Install gear shift lever rubber boot Check again for a free neutral and operation in all gears Install the brake shaft Woodruff key and instal
44. l the brake drum Install the brake drum retaining snap ring Install the brake band and secure with the two retaining bolts Assembly of 5058 Series With Bevel Gear Differential 1B Install the input shaft and gear assembly 2B Install the 2nd and high shift rail and fork as sembly the one with the unequally spaced detent grooves together with the 2nd and high sliding gear the smaller of the two sliding gears The sliding gear fits down over the input shaft with the shift fork groove up See Figure 21 3B Install one stop ball spring and stop pin See drawing Figure 15 4B Install the 2nd stop ball and using a punch push the ball in against the spring Move the 2nd amp high shift rail into the neutral position and continue to push on the punch until the ball is fiush with the shift rail bore At the same time insert the low and reverse shift rail and fork as sembly together with the low and reverse sliding gear removing the punch as the shift rail passes the ball See detent drawing Figure 15 Note The low and reverse gear fits down over the input shaft with the shift fork groove down See Figure 21 FIGURE 21 5B Install the splined pinion shaft gear down over the input shaft gear and through the two sliding gears 6B Shift the 2nd and high shift rail and fork assem bly in to 2nd speed position 7B Install the reverse idler gear shaft and gear assembly making sure that the shoulder of the gear goe
45. l No 11628 contain Part No 3521 Spline Shafts with 10 straight sides splines and matching gears Part Nos 3523 3524 and 3526 All tractors and replacement transmissions produced after tractor serial number 11628 contain Part No 3521 Spline Shafts with 11 involute tooth form splines and matching gears Part Nos 3523 3524 and 3526 The matching gears for the two types of Spline Shafts are NOT inter changeable although the part numbers are identical It is suggested that when ordering the 3523 High and Second Gear the 3524 Low and Reverse Gear or the 3526 Splined Pinion Gear the number of Splines on the 3521 Spline Shaft be noted This will eliminate the possibility of receiving gears which will not assemble on the Spline Shaft The ordering of the 3521 Spline Shafts should be handled in the same manner 4 3559 BRAKE SHAFT The original 43559 brake shaft has been replaced with a new design The new shaft has more strength and able to carry more load 5 The 43502 differential case and gear has been replaced with port 47243 and 3559 See Figure A If either the original 43559 or 43502 are required order both new parts 43559 and 7243 The new parts are shown in Figure A The original construction is shown in the exploded view drawing FIGURE A 12 13 5003 5010 Transm ission 5003 5010 TRANSMISSION When ordering parts always list Part No and name of part Specifications subject to
46. lation NOTE t is recommended that two pilot studs be used to facilitate transmission installation To make the studs cut the heads off of two 16 x 2 hex head or carriage bolts Grind a taper on the un threaded end of each bolt Screw the studs into diag onally opposite upper and lower tapped holes in the front of the transmission case Install input pulley axle hubs and wheels Move the transmission assembly into place and guide the shift levers up between the frame rails Align the pilot studs with the corresponding holes in the frame butt plate and push the transmission firmly against ditions in which normal differential action would transfer power to the wheel with least traction EPLACEMENT models remove the fender and seat assembly the dust cover and instruction plate located just ahead of the shift levers Remove the cap screws that fasten through the bottom of the tool box into the top of the transmis sion Remove four cap screws that go through the frame butt plate into the front of the transmission Lower the front of the transmission guide the shift levers down between the frame rails and roll the transmission and wheel assembly free of the tractor Drain lubricont remove wheels and clean the trans mission as necessary before disassembling the plate Install cap screws in the top of the trans mission and the open holes at the front and tighten them until snug Remove the pilot studs one at a time
47. ll wheels and hubs and move assembly into place on the tractor Install three bolts through holes in each transmission side cover and corresponding holes in frame side rails Tighten nuts securely Remove three bolts at each transmission side cover and frame side rail Move transmission assembly away from the tractor Remove the wheels and hubs clutch and idler arm assembly and transmission in put pulley Drain lubricant and clean case as necessary be fore disassembling ORCC marr er ream Install drive belt and belt guard Connect clutch rod Lay lift cable in place along top of transmission install hitch and connect lift cable Install fender and tool box assembly if so equipped and install seat Remove support from be neath tractor frame 5003 5010 3 SPEED TRANSMISSION Disassembly The transmission should be mounted in a vise or suitable fixture as shown in Figure 1 with the left cover up and the gear shift lever and top of the case toward the mechanic working on the unit FIGURE 3 4 Clean and remove all burrs from both axle shafts and brake shaft and remove both axle seals 5 Remove the nine left cover retaining bolts and lift off the cover NOTE Figures 2 and 3 show FIGURE 1 the two types of covers used on these transmis sions one with a ball bearing and one with a The following steps are for complete disassembly needle bearing at the brake shaft location Re with the transmission in t
48. ls Align the pilot studs with the corresponding holes in the frame butt plate and push the transmission firmly against the plate Install cap screws in the top of the trans mission and the open holes at the front and tighten them until snug Remove the pilot studs one at a time replacing them with cap screws Tighten all six cap screws se curely Connect brake linkage Install dust cover in struction plate fender and seat assembly drive belt belt guard foot rest etc Fill the transmission to proper level with S A E 140 A P l Service GL 5 gear oil Remove support from beneath tractor frame Test tractor operation 8 SPEED TRANSMISSION Disassembly 1 Remove axle hubs and input pulley 2 Place the transmission assembly in a vise or suitable holding fixture as shown in Figure 1 shown with levers brake band brake drum hubs and input pulley removed FIGURE 1 3 Place the shift lever in neutral and pull the shift lever rubber boot from the transmission boss Loosen the shift lever retaining lock nut and set screw and remove the shift lever 4 Remove the roll pin and remove the high low range lever 5 Remove the two 2 brake band retaining bolts and remove the brake band 45 FIGURE 2 6 Remove the brake drum retaining bolt and wash er and remove the brake drum using a suitable puller as required 7 Remove paint and burrs from both axle shafts brake shaft and the input shaft
49. nd gears toward the center and remove the assembly from the bull gear The differential blocks and gears may now be removed from the shaft The axle shafts gears and thrust washers may now be removed from the differential case The axle gears may be removed from the axle shafts by removing the roll pins A break down of the parts is shown in Figure 4 FIGURE 3 Lom CANE TELA DC GOST bag BOCES Se PLAT POTON BEVEL GEAR DIFFERENTIAL Assembly 22 If the axle gears have been removed from the axles install the gears and retain with the roll pins Install a thrust washer on each axle next to the gear Install the short axle gear and thrust washer assembly into the threaded left hand differential case Install differential shaft gears and blocks as an assembly into the bull gear and push the gears and blocks outward seating the blocks into position in the bull gear Install the bull gear differential shaft gears and blocks as an assembly onto the differential case seating the differential block and bull gear See Figure 3 Install the right hand long axle gear and thrust washer assembly into the right hand differential case Install the right hand case and axle assembly onto the bull gear and center over the differ ential blocks Secure with the 4 36 bolts and washers Tighten evenly making sure the assem blies seat properly 23 5053 Typical Spur Gear Differential Type 5
50. ng bear ings Always renew all oil seals and gaskets If the differential and axle assembly is to be serv iced refer to Differential Overhaul Section 5003 5010 3 SPEED TRANSMISSION Assembly 1 Install the reverse idler gear in position so that the chamfered end of the gear faces the left side of the case This will position the gear with the straight edge toward the right side of the case as shown in Figure 9 Install the reverse idler pin and secure with a X roll pin FIGURE 9 2 Position the low and reverse shift fork the one nearest the end of the case between the shift rail supports so that the shift lever groove points toward the opposite shift rail 3 Insert the low and reverse shift rail the one with the equally spaced detent grooves and 10 slide into position making sure the detent grooves are toward the opposite shift rail Se cure the shift fork to the shift rail with a 4 x 1 roll pin Position the low and reverse shift rail assembly so that the center neutral detent groove lines up with the detent hole and install one of the stop balls spring and the shift stop pin Place the other ball on top of the spring and push the ball and spring through the high and second shift rail bore with a X punch until the ball is flush with the bore Insert the high and second shift rail removing the punch as the shift rail passes the ball Position the shift fork on the shift rail so the s
51. ogether with the low and reverse sliding gear making sure to catch the stop ball and other detent parts as the shift rail is removed Remove the 2nd and high shift rail and fork assembly together with the 2nd and high sliding gears Remove the remaining detent parts ball spring and stop pin from the detent passage Remove the gear and spline assembly from the input shaft Figure 5 20 n T em FIGURE 5 Remove the input shaft Figure 5 21 Remove the sliding gear from the high low range shift fork assembly Figure 6 22 Remove the input shaft to case thrust washer G i iacu T Fe FIGURE 6 23 Remove the high low range detent bolt and shift fork assembly Figure 6 24 Remove the detent bolt from the shift fork being careful to catch the stop ball and spring 25 Remove the reduction gear shaft Figure 7 by driving it out toward the inside of the case and remove the reduction gear 26 Remove the high low range shift lever and shaft assembly from the inside of the case FIGURE 7 Needle Bearing Replacement If needle bearings are to be replaced they should be removed and installed with suitable arbors Cluster Gear The cluster gear and brake shaft assembly may be disassembled as shown in Figure 8 Disassemble and assemble carefully to avoid damage to the Woodruff key and bushings The cluster gear bushings may be removed and installed using suitable arbors FIGURE 8
52. on and reduction gear as sembly and the thrust washer if used Install the reverse idler gear shaft and gear as sembly making sure the shoulder of the gear goes down Figure 16 END A HIGH SHIFT RAIL REVERSE IDLER LA FIGURE 16 Install the cluster gear and brake shaft assem bly See Figure 18 Install the differential and axle assembly with the retaining bolt nuts up toward the left hand case Figure 19 Recheck for proper assembly a free neutral and proper operation in all gears in both ranges Place the shift forks in neutral position Install a new case gasket holding it in place with gasket sealer and install the left hand case Wie T AN 2x D NY is OMNEM KY FIGURE 17 21 22 23 24 49 FIGURE 18 Install the six 6 3 x 16 bolts and nuts tighten all bolts evenly to avoid distortion and Install the shift lever assembly and retain with the set screw and lock nut Install gear shift lever rubber boot Install the high low range selector lever and retain with the X roll pin Recheck for a free neutral and proper operation in all gears and ranges 3 Remove the axle shaft and gear from the case Remove the differential bull gear Note position of the eight 8 pinions Adjacent pinions are installed in opposite directions which make the position of the diagonally opposite pinions the same See Figure
53. on need not be further dis assembled Refer to Differential Overhaul Section Shift the 2nd and high shift fork assembly up into the 2nd speed position See Figure 3 D dent Age Ce AE an w LEET PHON Graa WS GER Datt fotz CANE Cia p xmuc IO Dieu FIGURE 3 Remove the cluster gear assembly the brake shaft assembly and the reverse idler gear and shaft Remove the splined pinion gear from the input shaft Wiih a screw driver or other suitable tool remove the plug from the detent passage as shown in Figure 4 p AOW amp REVERSE Afs LAM Loew g Prepat USPT BAR W I Lag grees pias FIGURE 4 15 Place the shift forks in neutral and remove the low and reverse shift rail and fork assembly the one nearest the end of the case together with the low and reverse sliding gear making sure to catch the stop ball and other detent parts as the shift rail is removed 16 Remove the 2nd and high shift rail and fork assembly together with the 2nd and high sliding gears 17 Remove the remaining detent parts ball spring and stop pin from the detent passage 18 Remove the gear and spline assembly from the input shaft Figure 5 THET lt i FIGURE 5 19 Remove the input shaft Figure 5 20 Remove the sliding gear from the high low range shift fork assembly Figure 6 21 Remove the input shaft to case thrust washer FIGURE 6 22 Remove the high low range detent bolt and shift
54. oodruff 2 4204 Gear Reverse idler 1 1516 Bushing Bronze y LD 1 3903 Gear Broke Shoft 1 3902 Drum Broke 937022 Key 15 Woodruff 1 936131 Snap Ring 1 Shoft 1 7376 Ass y Brake Band amp Lining 1 908002 4 Bolt Hex 4 20 x 2 920081 4 Lockwasher 4 Dia 2 943460 Plug Y4 Pipe 1 943420 Plug 34 Pipe 1 3912 Gasket 1 908043 4 Bolt Hex 24 16 x 3 2 1 908038 4 Bolt Hex 24 16 x 2 5 915113 6 Nut Hex 16 Nylok 6 5632 Ass y Shift Stick 1 3577 Boot Shift Stick 1 1239 Set Screw Dog Point 14 20 x 4 1 915111 6 Nut Hex 14 20 Nylok 1 1001 Knob 1 Not included in No 5053 Assembly 24 5058 Bevel Gear Differential Type 5058 TRANSMISSION PARTS LIST When ordering ports always list Part No and name of part Specifications subject to change without notice Item Part No Item Part No No No Description Req d No No Description Req d 1 6940 Case R H 1 33 5615 Rail Front Shift 1 2 1533 Boll Bearing 1 5 LD 2 34 5616 Rail Rear Shift 1 3 1532 Bearing Needle 1 I D 1 35 3503 Fork Shift 2 4 1508 Bearing Needle 24 LD 1 36 933156 Roll Pin x 1 2 5 1526 Bearing Needle 1 LD 2 37 3517 Ball Shift Stop 2 6 1529 Bearing Needle 24 LD 2 38 3528 Spring Shift Stop 1 7 1303 Seal Oil Shaft 1 39 5614 Pin Shift Stop 1 8 1213 Seal Oil 1 Shaft 2 40 3525 Gear Cluster 1 9 3915 Pin Dowel 2 41 1504 Bearing Bronze LD 2 10 6941 Case L H
55. red Note Install the snap rings with the sharp side of ue snap ring toward the inner end of the axles Install one of the axle and gear assemblies in the differential case and on the early type install the four 4 pinion shafts Install two 2 pinions with their teeth up diag onally opposite each other and install the other two 2 pinions with their teeth down diagonally opposite each other See Figure 1 and 1A 4 Install the differential bull gear over the pinion shafts mesh the gears and seat the case against the ring gear 5 Install the remaining axle and gear assembly in the remaining differential case Center the bull gear and install the four 4 re taining bolts and nuts Tighten securely and 6 Position the axle and gear and differential case evenly to avoid distortion 4 SPEED TRANSMISSION e ONE PIECE SOLID PINION DIFFERENTIAL TWO PIECE PINION amp SHAFT DIFFERENTIAL 443 4 SPEED TRANSMISSION ITEM NO DESCRIPTION 2 10 R H Case L H Case 2 11 Ball Bearing 172 D 2 12 Needle Bearing 1 l D 2 13 Needle Bearing 34 LD 2 14 Needle Bearing 1 D 2 15 Needle Bearing 34 D 2 16 Oil Seal 34 Shaft 2 17 Oil Seal 1 Shaft 2 18 Dowel Pin 2 20 Needle Bearing 34 I D 2 21 Needle Bearing 2 I D 2 22 Differential Case 2 22A Differential Case 2 23 Differential Bull Gear 2 24 Differential Pinion Gear 2 24A Differential Pinion Gear 2 25 Shaft 2 26 Axle
56. ring Needle 1 LD 2 6 1529 Bearing Needle LD 2 7 1461 Seal Oil Shaft 1 8 1213 Seal Oil 1 Shaft 2 9 3915 Pin Dowel 2 10 6941 Cose LH 1 1 1530 Bearing Needle 1 LD 1 12 1531 Bearing Needle 4 LD 1 13 1232 Sec Oil 1 Shaft Brake 1 14 7194 End Cap R H 1 15 7195 End Cop L H 1 16 7196 Geor Differential Ring 1 17 7197 Geor Axle 2 18 7198 Geor Differential Pinion 10 19 7199 Washer Thrust 2 20 908138 4 Boh 16 x 3 21 915663 4 Nut Elastic Stop 16 22 920009 4 Washer Flot SAE 10 23 7202 Axle Reor R H 1 24 7203 Axle Rear LH 1 25 7169 Snap Ring Heavy Duty External 2 26 7201 Shaft Input 1 27 7204 Gear amp Spline 1 28 1518 Bearing Needle LD 4 29 5175 Pinion Gear amp Spline 1 30 7205 Geor Sliding 1 31 7206 Gear Reduction 1 32 7207 Bearing Needle LD 2 33 7208 Shaft Reduction Geor 1 34 7209 Ass y Shift Fork 1 35 3517 Ball Stop 3 36 3518 Spring Stop 2 37 7213 Bolt Detent 1 38 7214 Lever Shift U 39 7200 Body 2 40 933209 Roll Pin 4 4 7235 Spring Cylindrical 1 Part No No No Description Req d 42 5173 Gear Hi and 2nd 1 43 5174 Gear Low ond Reverse 1 44 5615 Roil Front Shift 1 45 5616 Rail Rear Shift 1 46 3503 Fork Shift 2 47 933156 Roll Pin x 1 2 48 5614 Pin Shift Stop 1 49 3525 Gear Cluster T 50 1504 Bearing Bronze iD 2
57. s down 8B Install the brake shaft gear 9B Install the cluster gear assembly 10B Install the differential and axle assembly with the differential bolt heads down This will place the left hand differential case with the threaded bolt holes up 11B Place shift forks in neutral position Check for a free neutral and proper operation in all ranges 12B Install a new case gasket holding it in place with gasket sealer and install the left hand case 13B Install the six 6 x 16 bolts and nuts and tighten all bolts evenly to avoid distortion 14B Install the shift lever assembly and retain with the set screw and lock nut Install gear shift lever rubber boot 15B Check again for a free neutral and operation in all ranges 16B Install the brake shaft Woodruff key and install the brake drum Install the brake drum retaining snap ring 17B Install the brake band and secure with the two retaining bolts DIFFERENTIAL OVERHAUL STANDARD DIFFERENTIAL Disassembly 1 Remove the four 4 retaining bolts and nuts 2 Lift off the differential side case together with the axle shaft and gear Remove the axle shaft and gear from the case 4 Remove the differential bull gear Note position of the four 4 pinions Adjacent pinions are installed in opposite directions which make the position of the diagonally opposite pinions the same See Figure 1 FIGURE 1 6 Remove the pinions and shafts and remove the r
58. t side cover bolts Do not tighten at this time Make sure shift forks are in neutral position and insert shift lever and secure with the retaining set screw and lock nut Do not tighten set screw too tight as it may bind the shift lever Install the shift lever rubber boot uisa 19 20 21 22 23 24 25 26 CARE diti aiit B P f eu pras apa R I FIGURE 12 Turn input shaft and shift transmission into all ranges to determine if the unit has been proper ly assembled Install gasket on left side cover using gasket sealer to hold in place Install left side cover over the axle and brake shaft and tap gently into position making sure that all bearings and shafts are properly seated Install left side cover retaining bolts and torque all bolts on both side covers evenly Check transmission for proper operation and for a free neutral Carefully install all new oil seals and again check for free operation Install the brake shaft Woodruff key and install the brake drum Secure the brake drum with the snap ring Install the brake band and fasten to the anchor bracket with the two bolts Fill transmission to check plug level with lubri cant The fill plug is located on top of the case The check plug is on the right side cover next to the axle tube 5003 5010 DIFFERENTIAL OVERHAUL For removal of differential assembly see Trans mission Disassembly Section
59. te from them as necessary for any particular tractor Remove mid mounted or trailing attachments or hitches which might interfere with transmission re moval Support the tractor frame ahead of the trans mission just enough that the rear wheels no longer carry any weight Remove the R H foot rest belt guard and belt Disconnect the brake rod or remove the brake band from the anchor bracket Remove the fender and seat assembly the dust cover and instruction plate located just ahead of the shift levers Remove the cap screws that fasten through the bottom of the tool box into the top of the transmis sion Remove four cap screws that go through the frame butt plate into the front of the transmission Lower the front of the transmission guide the shift levers down between the frame rails and roll the transmission and wheel assembly free of the tractor Drain lubricant remove wheels and clean the trans mission as necessary before disassembling Installation NOTE t is recommended that two pilot studs be used to facilitate transmission installation To make the studs cut the heads off of two 3 16 x 2 hex head or carriage bolts Grind a taper on the un threaded end of each bolt Screw the studs into diag onally opposite upper and lower tapped holes in the front of the transmission case Install input pulley axle hubs and wheels Move the transmission assembly into place and guide the shift levers up between the frame rai
60. upper holes in the front of the transmission case Put the other one in the diagonally opposite lower hole Install input pulley axle hubs and wheels Move the transmission assembly into place and guide the shift lever up between the frame rails Align the pilot studs with the corresponding holes in the frame butt plate and push the transmission firmly in place against the plate Install cap screws in the top of the trans mission and the open holes in the front and tighten them until snug Remove the pilot studs one at a time replacing them with cap screws Tighten all six cap screws securely Connect brake linkage Install dust cover instruc tion plate fender and seat assembly drive belt belt guard foot rest etc Fill the transmission to proper level with S A E 140 A P l Service GL 5 gear oil Remove support from beneath tractor frame Test tractor operation 4 SPEED UNIDRIVE TRANSMISSION Disassembly These instructions apply to all unidrive models un less indicated A section applying only to specific models will be so identified 1 Remove axle hubs and input pulley 2 Place the transmission assembly in a vise or suitable holding fixture as shown in Figure 1 RAKE BAND BOLTS FIGURE 1 3 Place the gear shift lever in neutral and pull the gear shift lever rubber boot away from the trans mission boss Loosen the gear shift lever retaining lock nut and set screw and remove the gear shift lever
61. ylindrical spring from the differential bodies Press the two 2 differential bodies from the dif ferential ring gear The right and left differential bodies are iden tical with roll pins located next to two 2 bolt holes Figure 4 The matching roll pin holes in the left hand 5 end cap are also located next to the bolt holes but in the right hand end cap they are between bolt holes as shown in Figure 6 6 FIGURE 3 FIGURE 5 33 Remove the end caps and thrust washers from each axle The axle gears may be removed after removing the retaining snap rings FIGURE 5 shows the differential parts in relation to each other Note that the right hand end cap and axle is noticeably longer than the left hand end cap and axle LIMITED SLIP DIFFERENTIAL Assembly install the axle gears on the axles and install the retaining snap rings Place the axle gear to end cap thrust washers on the axles next to the axle gears and install the respective end caps on the axles Note that the right hand axle and the hub of the right hand end cap is longer than the left hand axle and left hand end cap Using the left hand case as a workstand place the right hand long axle and right hand end cap long assembly in the axle housing Figure Raf rei e BOLT HORE BOL G kat PH HOLE FIGURE 6 Align the roll pins with their respective holes and seat one of the bodies in place on the end cap Refer to

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