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1956 AMC Hudson Body Bulletins

1. 1956 RAMBLER SERIES Improper bonding may exist on some early generator armatures at the point where the water pump drive extension is brazed to the hollow section of the shaft Therefore a check should be made to determine the condition of armature shaft brazing This can be done by loosening the fan belt and applying 25 foot pounds torque to the generator fan pulley retaining nut while holding the shaft at the water Dump shaft coupling area If the brazing with stands this torque satisfactory service can be expected A car or engine serial number check point is not available However the manufacturer assures correct brazing after date code 5K 20 stamped on the generator identification tag The Number 5 identifies 1955 production K indicates October and the Number 20 represents the day of the month which the generator was built Yours very truly F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEO NM ARD HUDSON AUTOMOBILES MASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS December 30 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT COIL POLARITY 1956 HORNET 6AND WASP SERIES A number of 1956 Hornet 6 and W asp Series were assembled with improper ignitio
2. Conversion kit package Part Number 6484609 consisting of distributor stop and cam plate governor weight springs vacuum spring and small miscellaneous parts is available for installation in Distributor Part 6480751 The installation of Part 6484609 will convert Distributor Part 6480751 into Part 6489834 Auto Lite Model IBJ 4001 E Specifications below Part Number 6489834 Auto Lite Model IBJ 4001 E Distributor assembly is also available for future service replacement on all 1956 80 Series when a complete unit is required The following specifications apply Governor Advance Vacuum Advance Engine Degrees and Engine Degrees and RPM Inches Mercury 0 600 RPM 0 8 2 750 RPM 2 8 5 8 16 1600 RPM 12 12 24 4000 RPM 18 14 3 4 28 5100 RPM 20 16 At time of installation of the conversion kits the new name plates included in package must also be installed to correctly identify the Distributor as Model IBJ 4001 E for future service operations A suggested Flat Rate Operational Time of 1 2 Hours has been established for the installation of Part 6484607 and 6484609 Includes R amp R Distributor Yours very truly F H Brodek F H Brodek Technical Service Manager ctp PRINTED IN U S A a T pue X c AMERICAN Motors CORPORATION HUDSON AUTOMOBILES E V I h ATOR AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND H
3. PRINTED IN U S A HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE I T UO A H D LEO NH A RD 3280 SOUTH CLEMENT AVENUE APPLIAN GES MILWAUKEE 7 WISCONSIN HZ 56 2 HD 56 2 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS November 15 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS SPARK PLUGS V 8 SERIES HORNET Changes in spark plug heat range and gap settings have been made in the 1956 V 8 Series Prior to Engine Number P 21543 Champion N 8 spark plugs were used Gap setting was 035 037 At Engine Number P 21543 Champion N 18 spark plugs became effective Cap setting is 033 037 Champion N 18 spark plugs will be supplied for service replacement in all 1956 Hornet V 8 Series engines Please note the above in the V 8 Series Engine Section and Electrical Section of your copies of the 1956 Technical Service M anual Supplements F H Brodek Ctp PRINTED IN U S A Y ours very truly F H Brodek Technical Service M anager AMERICAN Motors Corporation HUDSON AUTOMOBILES m E M A AUTOMOTIVE TECHNICAL SERVICE Kh W HASH AUTOMOBILES AN D LEON ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS December 12 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS GENERATOR ARMATURE SHAFT
4. ATMOSPHERE BRAKE FLUID 9 Iv H 12 13 14 15 16 1 Tube 12 Vacuum Check Valve 2 End Plate Internal Passage 13 Hydraulic Port From Master 3 Control Valve Piston Cylinder 4 Diaphragm 14 Slave Cylinder Operating 5 Vacuum Poppet Yoke 6 Atmospheric Poppet 15 Slave Cylinder Piston 7 Spring 16 Slave Cylinder Ball Check 8 Air Cleaner Valve 9 Power Piston 17 Hydraulic Port to Wheel 10 Spring Cyl inders 11 Push Rod FIGURE 2 Hydrovac in the Released Position The power piston is now balanced in vacuum and is held in the released position by the power piston return spring The slave cylinder hydraulic piston is pinned to the power piston push rod therefore in the released position it is held against the piston stop washer In this position the operating yoke of the hydraulic piston moves the ball check valve off its seat Fig 3 American Motors Technical Service Att 56 4 Page 4 HYD PISTON YOKE HOLDING BALL BALL CHECK VALVE STOP WASHER CHELE WAL VE mF E OFF OF SEAT DF SEAT FIGURE 3 Slave Cylinder Hydraulic Check Valve in Released Position In this position hydraulic brake fluid under released residual line pressure from the master cylinder is ported to both sides of the slave cylinder and internally ported through a passage in the end plate up to the control valve piston Applied Position In the applied position Fig 4 brake fluid under pressure from the master cylinder enters th
5. CLOCK NOISE PICKED UP IN RADIO 1956 RAMBLER SERIES A clock ticking noise picked up in the radio can be attributed to the routing of either the radio power lead in cable or the antenna lead in cable Correction involves the routing of the radio power lead in cable below the radio chassis Clip Part Number 3126393 can be retained to the bottom of the chassis with one of the screws used to route the power lead The antenna lead should be routed as far from the clock as slack permits Where the rerouting of the wire is not completely effective condenser Part Number 3112728 installed from the clock power lead to ground at the rear of the clock will completely filter the clock noise from the radio Y ours very truly CA I gt Ce 2 ez 3 F H Brodek Technical Service M anager F H Brodek ctp PRINTEDIN U S A AMERICAN Motors Corporation HUDSON AUTOMOBILES heat i E E Lv IN AT D RB AUTOMOTIVE TECHNICAL SERVICE MASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 9 HD 56 9 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS February 13 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT RADIO PANELESCENT DIAL LIGHT 1956 RAMBLER SERIES The panelescent dial light is operated on alternating current from a winding of the power transformer stage of the radio receiver A correction has been made at time of manufacture o
6. To install the shock absorber upper mounting reinforcement remove the rear shock absorbers Remove the original shock absorber grommet retainer welded to the underside of the crossmember The reinforcement is formed to take the place of the lower grommet retainer U se a bolt and nut through the shook absorber bayonet hole to hold the reinforcement in place while arc welding Figure 2 outlines the location and welding of the reinforcement The installation of the braces and reinforcements should be performed at the same time as the installa tion of the engine rear support hanger reinforcement Part Number 3415464 required prior to serial number D 278100 Service L etter HZ 56 3 and HD 56 3 filed under Group 1 000 outlines required installation procedure Initial shipments of the parts involved will be forwarded to all field warehouses Credit will be allowed for material at dealer net plus 10 per cent and labor at 65 per cent of the Flat Rate Time listed below based on the Dealer Labor M ultiple on record at each Zone NUMBER OPERATION SERIES TIME SH 100 INSTALL REAR SHOCK ABSORBER UPPER MOUNTING REINFORCEMENTS Weld reinforcement both sides Includes shock absorber R amp R 10 1 2 Hr SH 101 INSTALL REAR SHOCK ABSORBER UPPER MOUNTING AND ENGINE REAR SUPPORT HANGER REINFORCE MENTS Includes shock absorber amp 10 1 6 Hr SH 102 INSTALL REAR SHOCK ABSORBER UPPER MOUNTING REINFORCEMENTS LOWER SHOCK ABSORBER BRACKE
7. Fd POOR HASH AUTOMOBILES AN D LEQN ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APP LIRR OES MILWAUKEE 7 WISCONSIN HZ 56 6 HD 56 6 File Under GROUP 1 000 ENGINE ALL HUDSON DEALERS ZONES AND DISTRIBUTORS February 7 1956 ATTN SERVICE DEPARTMENT VALVE SPRING BAFFLES 1955 56 80 SERIES V alve spring baffles Part Number 6480914 became effective at Engine Number P 25889 T hese baffles are Installed under the valve springs with a flange extending upwards to the high side of the spring for improved oil control The rubber intake valve oil deflectors continue effect For service installation WHERE VALVE GRINDING IS NOT REQUIRED a special baffle kit Part N umber 6484396 consisting of 4 pieces valve spring baffle Part Number 6489127 and 8 lockwashers Part Number 6489048 may be installed without necessity of valve spring removal American otors Technical Service A tt 56 8 illustrates the installation of the baffle contained in Part Number 6484396 Service K It These baffles may be installed as follows Remove the cylinder head covers Loosen the rocker arm shaft bolts and lift off the rocker arm shaft assemblies Place the baffles in position on the rocker arm assembly as shown in Figure 2 Install the assembly on the cylinder head Replace the original rocker arm shaft bolt lockwashers with the square type lookwashers Install the rocker arm shaft bolts ake sure that the push rods are in the socket
8. Is A 5 H 1 fil B L 5 D aG BJ g D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 2 HD 56 2 File Under GROUP 13 000 WEATHER EYE SPEEDOMETER INSTRUMENT PANEL ALL HUDSON DEALERS ZONES AND DISTRIBUTORS January 20 1956 ATTN SERVICE DEPT WEATHER EYE CIRCULATION WITHOUT AIR CONDITIONING 1955 WASP HORNET 6 AND V 8 SERIES Improvement in circulation of heated ram air and fresh vent air in W eather Eye operation can be gained by altering the damper valves in the following manner Remove the right hand heater duct assembly from the dash panel Remove the damper valve assembly from the mounting plate of the heater duct Cut the entire inlet damper from damper rod The inlet damper portion is the forward damper as it is in stalled in the mounting plate Reinstall the damper assembly and the heater duct A djust the damper assembly so that when the control is in the VENT HEAT position the defroster damper is flush in the opening in the mounting panel This operation eliminates restriction of air flow caused by the inlet damper It will increase ram air velocity consequently an appreciable increase in heat and fresh air venting is gained In certain localities where an additional increase of ram air is desired the opening in the right hand side of the mounting plate may be closed off with tape or other suitable means However when this is done a
9. Upon disassembly of the front unit coupling mark the cover and driving torus shell with a fine punch at the snap ring gap Reassemble the parts indexing the punch marks with the snap ring gap This procedure is necessary to keep the factory balance of this part and to insure the rivets in the driving torus member are properly indexed with the notches in the cover REAR INTERNAL GEAR A 15 chamfer has been added to the front leading edge of the rear internal gear as illustrated in American Motors Technical Service Att 56 17 This has been done for identification purposes and to facilitate assembly When assembling the rear internal gear into the rear unit drum the chamfered edge should be inserted first and be positioned next to the clutch backing plate REAR SUN GEAR 25 drill point has been added to the rearward side of the rear sun gear This has been done for identification purposes If the main shaft and sun gear are disassembled for any reason care should be exercised in reassembly to position the side of the rear sun gear with the drill mark towards the rear of the main shaft as illustrated in American Motors Technical Service Att 56 17 If the gear is of the early type not incorporating the drill point it should be marked and reassembled in the same position as it was removed REAR UNIT SPRAG ASSEMBLY Prior to installing the rear sprag and outer race liberally coat with petrolatum the rear sprag inner race and
10. lever must be adjusted so that the taper on the end of the lever should contact a straight edge held against the machined surface at the rear of the transmission case This adjustment is outlined in the 1955 A utomatic T ransmission T echnical Service M anual Ultramatic Section Page 40 Figure 147 A fter measurement have been corrected warm up engine and set carburetor idle at 400 RPM Stop the engine and loosen the two lock nuts at the front and rear end of the adjuster on the rod PLACE THE REAR END OF THE ROD IN THE CENTER HOLE OF THE CROSS SHAFT LEVER Finger tighten the two look nuts so that the adjuster rod fits freely in the lever NOTE The adjuster rod has been located in the bottom hole of the cross shaft lever on first 1956 V 8 production cars The relocation to the center hole in the lever will improve shift characteristics Y ours very truly JC f L a T F H Brodek Technical Service M anager F H B rodek ctp Attach PRINTED IN U S A American Motors Technical Service Att 56 6 Litho in U S A FIGURE 1 CARBURETOR THROTTLE ROD AND ADJUSTER ROD MEASUREMENT Bend Here Ato Obtain FIGURE 2 T V ROD MEASUREMENT HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS ne a E a Ty i E AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE CET Y JN p SOR 3280 SOUTH CLEMENT AVENUE AND LEONARD A PPLIAN CES M
11. 4386583 and water control valve gasket 4386130 to dash panel with two screws GM 443946 Install heater switch cable 3134802 the loop end in the clamp 4371932 Use screw 4371931 to attach the loop in the clamp Install glove box mounting panel and route heater motor wire and control switch cable over and to the left side of the glove box mounting panel Route the control switch cable through the clip provided on the rear left hand corner of mounting panel and install and adjust to water valve NOTE certain that with the switch in the Off position the water valve is in the fully closed position Install right and left hand defroster nozzles 4386054 and 4386053 with brackets 4385923 and screws 8000305 to the underside of the instrument panel The defroster instrument panel inlay plates must be re moved to accomplish this operation It is also necessary to peel the rubber overlay back to remove the three screws holding plate in place When the assemblies are reinstalled cement rubber overlay back in place Install heater and defroster damper mounting plate 4387327 into heater and defroster duct 4390402 using screws 4388008 Install heater and defroster damper cable guide plate 4385974 with screws GM 161648 on the left hand side of the heater and defroster duct Install heater and defroster damper 4390404 incl rod on mounting plate in heater and defroster duct The following parts are used in the assembly of the d
12. DEPT INSTALLATION INSTRUCTIONS FORM 1 477 WEATHER EYE INSTALLATION KIT PART NUMBER 3119723 1956 WASP HORNET 6 HORNET SPECIAL V 8 and HORNET V 8 SERIES As a matter of information and record we are attaching a copy of Form Number I 477 Weather Eye In stallation instructions F H Brodek ctp Attach PRINTED IN USA Yours very truly prm LON tke F H Brodek Technical Service Manager Material List QUANTITY NO BR Bw m m e ND GO ON ON ON PN NN NO ee 1 477 INSTALLATION INSTRUCTIONS WEATHER EYE PART NUMBER 3119723 1956 HUDSON WASP SERIES 1956 HUDSON HORNET SIX SERIES V SERIES 1956 HUDSON HORNET V 8 SERIES PART NUMBER 4386072 4386365 4386256 4386255 4386367 GM 178781 GM 187483 4386074 GM 271085 3130267 Gm 163985 4387327 4390404 4386041 4386559 4386331 43 86332 GM 186469 4388008 4385974 GM 161648 4390402 GM 443946 3138385 3143050 3143069 3143045 3122345 3142364 4390689 3134802 4371932 4371931 GM 447119 4386046 4386130 GM 449346 4386039 4386040 4386053 4386054 4385923 8000305 4390278 8000015 DESCRIPTION Heater Switch Escutcheon Heater Control Assembly Heater Defroster Air Damper Control Cable Cowl Vent Damper Control Cable Control Cable Clamp Control Cable Clamp Screw Control and Escutcheon Fastening Screw Heater Control Knob Heater Control Knob Sc
13. H ydra M atic fluid Flat Rate Operation TRF 16 will apply F H Brodek PRINTED IN U S A Y ours very truly P yp r y P i a F H Brodek Technical Service M anager AMERICAN Motors Corporation HUDSON AUTOMOBILES E E UI AUTOMOTIVE TECHNICAL SERVICE on POOR AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE FRIqXN ES MILWAUKEE 7 WISCONMSIN HZ 56 1 HD 56 1 File Under GROUP 8 000 BRAKES AND WHEELS HUB AND DRUM January 11 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT HYDROVAC POWER BRAKE UNIT PART NUMBER 3117316 American Motors Technical Service Att 456 4 outlines complete servicing recommendations for Hydrovac Power Brake Unit Part Number 3117316 Yours very truly CAI F H Brodek Technical Service Manager F H Brodek ctp Attach PRINTED IN U S A American Motors Technical Service Att 56 4 HYDROVAC POWER BRAKE UNIT PART NUMBER 3117316 The Hydrovac is of the vacuum suspended type vacuum on both sides of the power piston in the released position and utilizes the original equipped master cylinder and pedal linkage The power assistance is provided through a pressure differential created across the power piston In the applied position one side is connected to vacuum from the engine intake manifold and the other side is open to atmospheric pressure thus creating a pressure differen
14. Nut Speed Nut Speed Screw Heater Blower Housing Gasket Heater Blower Housing to Dash Nipple Nipple Clip Heater Pipe Clamp Screw Lockwasher Instruction Sheet 1 477 Page 3 INSTALLATION PROCEDURE Drain cooling system Disconnect battery Remove existing cowl ventilator control assembly including knob and bracket on instrument panel cable and housing and discard Remove the heater core housing from the dash panel Remove the cowl ventilator damper damper rod and grommets These are installed in the heater core housing 3143114 Discard the housing removed from the car Cement the heater blower housing to dash gasket 3143199 to the dash panel at the blower opening Prior to installing the heater core housing coat the entire outside with a suitable sound deadener and insulator Install the heater core housing assembly on the dash panel using the four screws 800095 and washers GM 120391 The two screws 8000107 are used to attach the blower housing to the dash panel The screws used to retain the original heater core housing in place may be used when installing the new assembly Cement upper heater support cushion 3143196 to lower side of upper heater core support flange on the inside of the heater hopper box Cement 3143195 lower heater core support cushion to the top side of the lower support flange Remove glove box and mounting panel Remove the plastic louvre assembly from the heater inlet opening on the
15. S A ne a E p d a Ty a AMERICAN Motors CORPORATION HUDSON ME AUTOMOTIVE TECHNICAL SERVICE TOR NASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 55 1 HD 56 1 FileUnder GROUP 11 000 FRAME SPRINGS SHOCK ABSORBER MUD PANS AIl HUDSON DEALERS ZONES AND DISTRIBUTORS D ecember 26 1955 ATT SERVICE DEPT UPPER AND LOWER SHOCK ABSORBER MOUNTING REINFORCEMENTS 1956 RAMBLER SERIES CAMPAIGN Effective at car serial number D 277527 a brace Part Number 3148777 was added to the rear axle truss rod and shook absorber bracket to prevent bending of the bracket and resultant shook absorber damage On cars built after car serial number D 277527 up to and including car serial number D 27047 the brace was incorporated but only welded on one side The addition of the brace one per bracket and the completion of the welding on braces already in stalled can be performed on the car Figure 1 American M otors Technical Service A tt 256 3 outlines the welding location of the brace A reinforcement Part Number 3415299 has also been added to the body crossmember at the point where the upper end of the rear shook absorber is attached This reinforcement was added in production at car serial number D 279100 The brace two per oar and reinforcement two per car most be installed on all cars built prior to the above car serial numbers
16. be coated with hydraulic brake fluid prior to assembly When installing a new push rod leather seal in the end plate a 3 4 outer diameter punch may be used The lip of the seal should point into the end plate REASSEMBLY OF THE POWER PISTON Figure 13 illustrates a power piston assembly ring which can be made from 24 13 64 x 1 1 4 x 035 section of strap steel Refer to Figure 10 for proper parts assembly sequence 3 6 X DIA APPROXIMATE FIGURE 13 Power Piston Assembly Ring American Motors Technical Service Att 156 4 Page 14 When installing a new packing wick it must be cut to size and prior to assembly should be dipped in a suitable vacuum cylinder oil The packing ring should be installed so the prongs are pointing up into the wick Apply vacuum cylinder oil to the bore of the cylinder prior to installing the power piston MAINTENANCE 1 000 Miles Check the master cylinder brake fluid level Fill to 1 2 of filler opening 5 000 Miles Check all vacuum and brake fluid connections for leakage 10 000 Miles Check broke pedal linkage check linings and drum condition Clean air cleaner BLEEDING SYSTEM Bleeding the Hydrovac power brake system may be done manually or with a pressure type bleeder The proper procedure for bleeding this system 15 to first bleed off from the control valve bleeder screw and secondly the slave cylinder bleeder screw and from there bleed each individual wheel cylinder starti
17. flange to insure adequate lubrication during the first miles of transmission operation FRONT PUMP INSTALLATION To insure that the front pump and case center support are correctly aligned in the case Install the front pump into transmission Tighten the three front pump to case center support bolts Then back off 1 4 turn Apply air in the neutral clutch hole in case to position case center support against the snap ring With air still applied tighten case to front pump lock screw and torque 22 27 foot pounds Torque the three front pump to case center support bolts 25 30 foot pounds FRONT SEAL INSTALLATION Care should be exercised in the installation of the front seal assembly into the flywheel housing as illustrated in American Motors Technical Service Att 56 17 The recommended procedure is as follows Position the flywheel housing on a wooden block so as to support the housing at the oil seal hole instead of at the outer rim Install the front seal into the flywheel housing using KMO Tool J 6118 With the front seal secure in the housing stake the flywheel housing using a standard screw driver as illustrated in American Motors Technical Service Att 56 17 The machined finished hub area of the torus cover must be free of nicks and scratches to insure proper seal The above recommendations are made in order to insure that the housing is not damaged when the seal is installed FRONT UNIT SELECTIVE SPACER The front unit select
18. inside of the dash panel and discard Drill through spot welds of plate covering blower opening remove and discard plate Assemble the heater and defroster motor to housing insulator 3143070 on the heater and defroster motor 3145960 Use two lockwashers GM 131095 and two nuts GM 120622 and assemble the heater and defroster motor mounting plate 3143077 to the motor Install heater and defroster blower plate gasket 3143924 between the motor mounting plate and the heater blower housing and install heater and defroster assembly and plate using four screws 8000091 To facilitate mounting of this assembly insert assembly through heater hopper box cover opening and install screws through inlet opening in dash panel from inside of car The same procedure is followed to install the heater and defroster motor blower wheel 3143096 Insert the wheel through the heater hopper box cover opening Install on motor shaft Tighten the allen screw in the b ower wheel hub on the flat portion of the motor shaft This can be done through the blower motor opening in the dash panel from the inside of the car Install the blower housing inlet 3143047 in the heater hopper box with three screws 8000091 This can be done through the inlet opening in the dash panel from inside of the car Install heater core inlet and outlet gasket 3143069 on the heater core Install heater core 3143050 into the heater hopper box Be certain the rear tank is in between the suppor
19. linkage AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE RKEIVINATOR AN D EO M A RE D HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APP LIRR OES MILWAUKEE 7 WISCONSIN HZ 56 5 HD 56 5 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM January 23 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPT CARBURETOR FLOODING 1956 RAMBLER SERIES AS 2349 S CARBURETOR In some cases carburetors may flood even though the normal causes such as dirt or foreign material under the needle defective needle and seat or incorrect float level adjustment have been inspected This may be due to interference between the float hinge and needle seat Inspect the float for binding caused by interference between the inner end of the needle seat and the float hinge If the binding is relieved by loosening the needle seat then the seat must be removed and 1 32 cut from the inner end Reinspect the float level when reinstalling the needle seat as retightening on the original gasket may de crease the float height setting This condition should not occur on M odel A S 2349 S carburetors with date code B 6 or higher on the brass tag Y ours very truly CIE SZ F H Brodek Technical Service M anager F H B rodek ctp PRINTEDINUSA AMERICAN Motors Corporation HUCSON AUTOMOBILES VIEN T AUTOMOTIVE TECHNICAL SERVICE T HASH AUTOMOBILES AND
20. the right bank cylinder head in the right hand throttle mounting bracket Install heater hose water pump nipple 3142364 Gut a piece of bulk hose about 2 1 2 long and attach to water pump nipple with hose clamps Install heater hose pipe 3143936 into the short piece of hose attached to water pump nipple and secure with hose clamp The pipe is routed below the manifolds to the rear of the engine Install cylinder head heater hose nipple 3142369 in rear right hand cylinder head at the throttle mounting bracket Install control valve to upper heater outlet hose 3143045 with clamps 3122345 Install control valve to cylinder head hose 3143875 with clamps 3122345 Install heater pipe to heater core hose 3143878 with clamps 3122345 1 477 Page 8 Fill radiator and connect battery Start engine and with heater valve open and radiator cap removed run until air is bled from cooling system Top off radiator to full capacity and install cap Check operation of heater and blower and check for leaks Suggested Flat Rate Time 3 0 Hours 3 0 Hours 3 4 Hours 3 4 Hours 3 4 Hours Wasp Series Hornet 6 Series Hornet Twin H Power 6 Series Hornet Special V 8 Series Hornet V 8 Series AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE REIVIAN ATOR AND LEO NM ARD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 6 HD 56 6 File Un
21. transmission rear bearing snap ring on standard transmission equipped units The adjustment of the torque tube trunnion is outlined in the 1955 Technical Service Manual Rear Axle and Propeller Shaft Section Figure 49 Where failure of this nature is encountered install sleeve Part Number 3149883 supplied for service only by removing the rear extension housing three snap rings and speedometer drive gear Install the sleeve against the bearing and replace the Woodruff key and speedometer drive gear Select fit one snap ring in the groove at the rear of the speedometer drive gear to provide zero end clearance Part Number 3149883 Group 6 240 is illustrated in American Motors Technical Service Att 56 20 When the sleeve is installed only one snap ring is required Production will incorporate a steel washer between the rear bearing and rear bearing snap ring at a later date Yours very truly DIG F Brodek F H Brodek Technical Service Manager ctp Attach PRINTED IN USA American Motors Technical Service Att 56 20 Litho in 0 5 SLEEVE PART NUMBER 3149883 1955 56 LO SERIES STANDARD TRANSMISSION NASH AUTOMOBILES i Man AMERICAN MOTORS CORPORATION HUDSON AUTOMOBILES AUTOMOTIVE TECHNICAL SERVICE KELVINATOR 3280 SOUTH CLEMENT AVENUE SPECIAL PRODUCTS APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 20 HD 56 20 File Under GROUP 6 000 TRANSMISSION July 13 1956 A
22. when the adjustment washer is located behind the pinion gear The method of adjusting the pinion depth outlined in the 1956 Hornet Special V 8 Series Technical Service Manual Supplement 15 used when the adjusting washer is located behind the rear pinion bearing cup The following are the center line of rear axle to the rear face of the pinion gear measurements These measurements are to be used when checking pinion gear depth adjustment and apply to a correctly adjusted pinion marked 0 On a pinion marked 2 the measurements should be 002 less than this figure and with a pinion marked 3 the reading should be 003 greater F H Brodek ctp PRINTED IN U S A 10 40 5 60 Series Standard or Overdrive Equipped Hydra Matic Equipped Series All Ratios Series All Ratios and 80 Series All Ratios 2 095 2 098 2 094 2 625 2 547 Yours very truly p AE J EF J a e F H Brodek Technical Service Manager AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEOW A RD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 10 000 FRONT AXLE FRONT SUSPENSION STEERING GEAR February 1 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT TOE IN ADJUSTMENT ON POWER STEERING EQU
23. 0 SOUTH CLEMENT AVENUE APP LIRR OES MILWAUKEE 7 WISCONSIN HZ 56 10 HD 56 9 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM ALL HUDSON DEALERS ZONES AND DISTRIBUTORS April 25 1956 ATTN SERVICE DEPARTMENT INTAKE MANIFOLD 1955 56 80 SERIES There 15 a possibility of casting fins extending into the exhaust passage of the intake manifold These fins will reduce the flow of exhaust gas through the passage resulting in reduced manifold heat which will affect the climatic control operation On engines that have been operated in service for a period of time the paint on the center section of the intake manifold will become discolored slightly due to the heat of the exhaust gas In cases where unsatisfactory engine performance is encountered and does not respond to a thorough engine tune up it is suggested the manifold be inspected for discoloration If none exists an obstructed exhaust passage Is indicated requiring intake manifold removal for a complete inspection The fin obstruction in the passage may be broken out with a rod It is important that all obstructions be cleared from the passage to insure maximum exhaust gas flow The operation of the exhaust damper valve must also be inspected as a damper valve may become stuck in the open position which will reduce the flow of exhaust gases through the intake manifold Y ours very truly H E j qnem vy j F Jj F f a a Brodek F H Brodek Techn
24. 0 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 7 HD 56 7 FileUnder GROUP 3 000 ELECTRICAL WIRING LAMPS February 10 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT GENERATOR VOLTAGE REGULATOR WIRING 1956 RAMBLER SERIES WITH OVERDRIVE TRANSMISSION A number of 1956 Ramblers with overdrive transmission equipment may have been incorrectly wired at the generator voltage regulator during production The wire to the overdrive governor circuit terminal on the overdrive relay is to be connected to the generator armature G or A terminal of the generator voltage regulator In error some were connected to the field or F terminal of the voltage regulator This incorrect connection would result in intermittent overdrive operation and poor control of battery charging causing battery over charge The correction connections are shown in the 1956 Rambler Series Technical Service M anual wiring diagram Y ours very truly Cr ez 3 F H Brodek Technical Service M anager F H Brodek ctp PRINTEDIN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND MN ARD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 8 HD 56 8 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS February 10 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT
25. 1956 AMC Hudson Groups 1 000 thru 13 000 x 5 INDEX Group 1 000 Engine HZ 56 1 Vibration Damper 1956 Rambler Series HZ 56 2 Timing Cover Oil Seal Leakage V 8 Series HZ 56 3 Engine Rear Support Reinf 1956 Rambler Series HZ 56 4 Engine Rear Crossmember Brace 1956 40 Series HZ 56 6 Valve Spring Baffles 1955 56 80 Series HZ 56 8 Rear Main Bearing Torque Specs 1956 Special V 8 50 Series HZ 56 9 Cyl Head Corrosion amp Leakage 1955 56 Hor net 6 Series Group 2 000 Cooling System HZ 56 1 Water Pump Cartridge Lube 35610 Series Group 3 000 Electrical Wiring Lamps HZ 56 1 Ignition Timing 1956 Rambler Series HZ 56 2 Generator Armature Shaft 1956 Rambler Series HZ 56 3 Spark Plugs V 8 Hornet Series HZ 56 4 Coil Polarity 1956 Hornet 6 amp Wasp Series HZ 56 5 Back up Lights Incorrectly Wired 1956 Models HZ 56 6 Ignition Coil Unit Rambler amp Hornet V 8 HZ 56 7 Generator Volt Regulator Rambler with OD HZ 56 8 Clock Noise in Radio 1956 Rambler HZ 56 9 Radio Panelescent Dial Light 1956 Rambler HZ 56 10 Distributor Assy 1956 80 Series HZ 56 11 Inst Panel Cluster Remove 1956 Rambler HZ 56 14 Dist Changes in ID amp Specs 80 Series Group 4 000 Fuel Carburetion Exhaust HZ 56 1 Starting amp Cold Weather Warm up 80 Series HZ 56 2 1956 Rambler Carb Specs AS 2349 S HZ 56 4 Rough Engine Idle Wipers Operating Ra
26. 37 3143876 3143877 171586 3143936 3143875 3143878 3750497 15898 3135396 3143830 3142368 31 42364 3142369 3126330 4386403 4387764 GM 9406242 GM 161643 3143735 3143114 3143128 3413129 8000095 GM 120391 3143660 3143661 8000107 3143199 3142366 3142367 3143736 3147731 GM 180116 GM 120382 1 477 1 477 Page 2 DESCRIPTION Connector Heater Motor Extension Wire Motor Heater and Defroster Insulator Heater and Defroster Motor to Housing Nut Heater and Defroster Motor to Housing L W Heater and Defroster to Motor to Housing Nut Wheel Heater and Defroster Motor Blower Gasket Heater and Defroster Motor Blower Plate Plate Heater and Defroster Motor Mounting Screw Heater and Defroster Mounting Plate Cushion Heater Core Support Upper Cushion Heater Core Support Lower Inlet Blower Housing Pipe Water Pump to Heater Hose 60 Pipe Water Pump to Heater Hose 40 Hose Control Valve to Cylinder Head Hose Heater Core to Water Pump Pipe 60 Fitting Heater Hose Nipple 40 amp 60 Pipe Heater Hose 80 Hose Control Valve to Cylinder Head 80 Hose Heater Pipe to Heater Core Hose Clip Heater Motor Wire to Housing Elbow Grommet Nipple Nipple Nipple 80 Hose Control Valve to Cylinder Head Duct Heat Screw Screw Screw Clip Heater Pipe Housing Heater Core CP Cover Assembly Heater Core Housing Gasket Heater Core Housing Screw Heater Core to Dash Washer Heater Core to Dash
27. 9 1 2 Length Defroster Air Damper 1 GM 272123 Nut Defroster Air Damper Cable Jam 1 114607 Washer Defroster Air Damper 2 3130267 Clamp Damper Cable 2 GM 163985 Screw Damper Cable Clamp 1 3147729 Damper Defroster Air 1 3146473 Rod Damper Defroster Air 2 GM 174964 Screw Defroster Air Damper 2 GM 131096 Washer Defroster Air Damper Lock 2 4386559 Grommet Defroster Air Rod 1 3146786 Duct Heater Distribution 1 3146746 Gasket Heater Distribution Upper 1 3146747 Gasket Heater Distribution Lower 2 3411858 Brace Heater Distribution to Instrument Panel 4 8000091 Screw Heater Distribution to Instrument Panel 4 GM 162013 Screw Heater Distribution to Instrument Panel 1 1 492 Instruction Sheet Installation Procedure Drain the cooling system Disconnect the battery Remove the heater housing cover and discard Install right hand heater core support with Screws Part Number 8000091 Seal Part Number 3146319 is installed into the large hole in the center of the right hand heater core support Cement heater core gaskets Part Number 3146619 on each heater core support flange Install heater core Part Number 3147026 into heater core housing with the outlet and inlet tubes located to the left The heater core should be supported by the two flanges 1 492 Page 3 Install seals Part Number 3125432 on the heater core inlet and outlet tubes Install filter Part Number 3146696 Cement heater housing side insulat
28. BLER SERIES Rough engine idle caused by windshield wiper operation may be improved by relocating the vacuum booster pump outlet connection to the left rear side of the intake manifold cover carburetor mounting pad American Motors Technical Service Att 56 5 outlines the procedure for relocating the vacuum pump outlet fitting in the intake manifold cover Yours very truly a Cy gt Ce stu F H Brodek Technical Service Manager F H Brodek ctp Attach PRINTED IN USA American Motors Technical Service Att 56 5 Remove the carburetor and plug the opening with a greased shop cloth to prevent drill chips from entering the intake manifold Mark and drill a 21 64 hole in the left rear side of the carburetor mounting pad as shown in the illustration Tap the hole with a 1 8 standard tapered pipe thread NOTE Coat the drill and tap with grease before drilling and tapping to prevent chips from falling into the manifold Remove the vacuum pump outlet fitting from the rear end of the intake manifold cover and reinstall in the new location Install a 1 8 pipe plug in the former opening Cut the vacuum pump line approximately four inches from the flared end and install the cut section in the fitting Connect the ends of the vacuum pump line with a ten inch section of 3 16 inside diameter windshield wiper hose Reinstall the carburetor and route the line for clearance with the throttle
29. BUTORS ATTENTION SERVICE DEPARTMENT SCRAPING NOISE IN REVERSE 1956 FLASHAWAY TRANSMISSION Service Part Number 3200399 Rear Pump Intake Pipe it is available to eliminate a rattling or scraping noise occuring during reverse operation of the Flashaway transmission Procedure for installing the rear pump intake assembly is as follows Drain and remove oil pan Discard the gasket Remove the rear pump intake pipe 11011 ring seal and oil screen Discard the pipe and 11011 ring seal NOTE If the front pump intake pipe seal ring is disturbed during oil screen removal it should be replaced Install the bolt contained in the kit 1 2 into the counterbore end of the sleeve Then using the bolt as a driver in stall the sleeve into the canted hole adjacent to the rear pump intake hole until the sleeve is flush or within 1 16 below the machined face of the case Then remove the bolt from the sleeve A ssemble the rear pump intake pipe as an assembly as follows Install steel retaining washer on pump end of pipe Install new O ring seal next to retaining washer on pipe Install check valve into pump end of pipe Install pipe assembly into case Install pipe retainer with the raised edge out and the open end of the retainer toward the rear of the transmission Secure the retainer with bolt and lockwasher NOTE Torque the bolt to 5 6 Foot Pounds Install the oil screen Install oil pan using new gasket Refill transmission with
30. COMING OUT OF REVERSE M isadjustment of the manual control linkage or the back up light switch if so equipped may result in the Hydra M atic transmission coming out of reverse On cars equipped with back up lights do not attempt to change the control linkage before checking the adjustment of the switch Loosen or disconnect the switch at the manual control lever on the side of the transmission Then operate the car in reverse several times to ascertain the condition If loosening up or disconnecting the back up light switch corrects the condition readjust the switch to the proper spring tension This can be best accomplished by placing the control lever in reverse and adjusting the switch cable just enough to allow the spring to pull the switch rod to the contact position Y ours very truly CIE SD Lr rack F H Brodek Technical Service M anager F H B rodek ctp PRINTED IN USA AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE REIVIN ATOR AN D E N A R D HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 6 000 TRANSMISSION February 13 1956 ALL HUDSON DEALERS ZONES amp DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR OIL PUMP DRIVER 1955 56 ULTRAMATIC TRANSMISSION A now machined type rear oil pump driver Part N umber 6480 292 became effective in production beginning with Ultramatic transmissi
31. DISTRIBUTORS ATTN SERVICE DEPARTMENT CLUTCH AND BRAKE PEDAL SHAFT LUBRICATION FITTING 1956 40 AND 60 SERIES Production has recently incorporated a new heavier lubrication fitting on the clutch and brake pedals Effective car serial numbers are not available Where breakage of the original small press type fitting occurs a correction can be attained by drilling out the remaining portion of the fitting with a No 3 drill 213 Thread approximately 3 16 of predrilled portion of hole with a 1 4728 tap and install lubrication fitting Part Number G 271287 The pedals do not have to be removed to perform this operation Yours very truly AF I w ALLE pte F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN USA AMERICAN Motors Corporation HUDSON AUTOMOBILES xs E E VIN O AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND LEON A R D SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE A P P Ll l A H MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 9 000 REAR AXLE PROPELLER SHAFT February 13 1956 ALL HUDSON DEALERS ZONES amp DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR AXLE PINION OIL SEAL PART NUMBER 3128171 RAMBLER SERIES 1951 TO 1955 INCLUSIVE An improved rear axle pinion oil seal is available for parts service replacement The part number of the oil seal has not been changed The improvement has been accomplished in the fabrication of t
32. GM 125591 Install grommets Part Number 4386559 into brackets Part Number 3146238 Grommet washers Part Number 8000145 are installed on each end of the damper rod Install brackets on damper rod and install brackets to the dash panel with screws Part Number 8000093 Install grommets Part Number 4386559 into the defroster damper rod holes in the heat distribution duct Part Number 3146786 Install washers Part Number GM 131096 on defroster air damper rod Part Number 3146473 and install damper rod into heat distribution duct Install defroster air damper Part Number 3147729 to damper rod with screws Part Number GM 174964 Cement heat distribution duct upper and lower gaskets Part Number 3146746 and 3146747 to blower opening on heat distribution duct Install braces Part Number 3411858 to heater distribution duct with screws Part Number 8000091 Install heater distribution duct to dash panel with screws Part Number GM 162013 and attach braces to rear of glove box mounting panel with screws Part Number 8000091 Install defroster hose Part Number 3146781 from heater distribution duct opening to the defroster air duct Remove plug from center opening in the control panel on left hand side of instrument panel Install switch and heater air damper control Part Number 3146524 into center opening Insert from the rear The switch is held in place with French mounting nut Part Number 3128826 Install heater switch knob Part Numbe
33. ILWAUKEE 7 WISCONSIN HZ 56 2 HD 56 2 FileUnder GROUP 6 000 TRANSMISSION February 3 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPT 1955 56 SERIES ULTRAMATIC TRANSMISSION FRONT PUMP KITS AND ASSEMBLIES Thefollowing kits and assemblies are being released as Zone Stock items for installation where wear is encountered in the converter pump shaft The new pump rotor incorporates a forty 40 tooth spline the same as the forty 40 tooth spline in the converter pump shaft For all 1955 Series transmissions the following kits and assemblies are to be used They are not inter changeable with the 1956 Series with the exception of Part N umber 6489367 Rotor A ssembly This is due to a change in the 1956 pump body effective with the first 1956 production which provides an oil circuit to the high range clutch W here it is found necessary to replace a new pump assembly Part N umber 6484527 or a new rotor as sembly Part N umber 6469367 in the 1955 Series the original converter pump shaft M UST be drilled with six 1 8 holes properly indexed in six places in the groove behind the splines as illustrated in American M otors Technical Service Att 256 7 After drilling all burrs and sharp edges must be re moved PART NUMBER DESCRIPTION 6489367 Rotor Assembly 6484527 Pump Assembly 6484522 Converter Shaft Assembly Drilled 6484530 Pump Assembly and Converter Shaft K it A new drilled converter shaft ass
34. IPPED CARS ALL SERIES W hen adjusting toe in on power steering equipped cars operate the engine This will permit oil pressure supplied by the power steering pump to center the valve spool in the power cylinder control valve The steering wheel spoke may then be readily adjusted to the desired center position Y ours very truly Se F H Brodek Technical Service M anager F H B rodek ctp PRINTED IN USA AMERICAN Motors Corporation HUDSON AUTOMOBILES 1 E E V IN A T i AUTOMOTIVE TECHNICAL SERVICE T ULP Di NASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 2 HD 56 2 File Under GROUP 10 000 FRONT AXLE FRONT SUSPENSION STEERING GEAR April 23 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT STEERING GEAR FILLER PLUG REMOVAL FOR LUBRICANT LEVEL INSPECTION 1956 50 SERIES Requests have been received for a suggested procedure for removing the steering gear filler plug for lubricant level inspection on the 1956 50 Series as a result of minor clearance provided With the car elevated on a hoist the filler plug is accessible from below the front of the car A 5 8 ratcheting box socket similar to Snap On Tool Number 76 or 77 is suggested for removal of the filler plug Lubricant may be added with use of a hand gun provided with a long solid or flexible nozzle Yours very truly Cj i p P ZU iF a
35. LEON A RE D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 6 HD 56 6 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM February 23 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT 1956 RAMBLER SERIES AS 2349 S CARBURETOR FUEL ECONOMY Reports have been received on poor fuel economy on some of the first production Rambler Series Improved production quality effective with the AS 2349 S carburetor bearing Date Code B 6 will insure maximum fuel economy Serious consideration should be given to owner complaints of unreasonably low fuel mileage where the carburetor has been inspected and the engine tuned to specifications without any improvement In these cases it is recommended that a new carburetor Part Number 31 5128 B 6 Code be installed inasmuch as it is impractical to fully detect manufacturing imperfections The original carburetor must be carefully packaged in the container in which the new part was received and returned to American Motors Claims Dept in accordance with established R F C procedure Yours very truly MET fc a gt Brodek Technical Service Manager F H Brodek ctp PRINTED IN U S A a a E pamm T X AMERICAN Motors CORPORATION HUDSON AUTOMOBILES a VINA AUTOMOTIVE TECHNICAL SERVICE 2k Praia MASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 328
36. LL DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT MODIFIED 5610 SERIES TRANSMISSION IMPROVED THROTTLE SHIFT PATTERN Please refer to Service Letter HZ and HD 56 18 dated une 15 1956 filed under Group 6 000 It has now been determined that the changes outlined therein for the 5610 Series equipped with E 56 ydra M atic transmission will also improve the light throttle upshift pattern on the E 55 and Y 55 transmissions While the changes as outlined for improved shift points prior to serial number D 331043 continue in ef fect Part Number 3149854 Accelerator Shaft Assembly 3149851 Rod and 3131562 Clip did not actu ally enter production until serial number D 332793 The T V bellcrank rod lever located on accelerator shaft assembly Part Number 3146959 was relocated 400 upward and became effective at D 331043 Y our Parts W arehouse M anager will be advised when Part Number 3200110 Carburetor Control Shaft Kit Group 4 070 will be available Y ours very truly Dru Brodek Technical Service M anager F H Brodek ctp PRINTED IN USA AMERICAN MOTORS CORPORATION HUDSON AUTOMOBILES AUTOMOTIVE TECHNICAL SERVICE KELVINATOR NASH AUTOMOBILES 3280 SOUTH CLEMENT AVENUE ANDLEONARD SPECIAL PRODUCTS APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 21 HD 56 21 File Under GROUP 6 000 TRANSMISSION September 21 1956 ALL DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT AUTOMATIC TRANSMISSION FL
37. MH ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE A PP 1 CES MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM ALL HUDSON DEALERS ZONES AND DISTRIBUTORS December 27 1955 ATT SERVICE DEPT STARTING AND COLD WEATHER WARM UP 1955 56 80 SERIES As automatic choke operation affects cold starting warm up and at normal operating temperatures it is important that the following items be checked and corrected as required to provide satisfactory engine operation The choke valve must be inspected for fit in air horn It must not bind in the carburetor air horn There must be a clearance of 005 between either side of the choke valve and the air horn to insure freedom from binding Remove and file the choke valve sides if necessary to obtain the correct clearance Use new valve retaining screws upon reinstallation Upset the end of the screws when the valve has been tightened in the correct position Inspect the Choke valve shaft for sticking in the air horn This may be due to misaligned shaft bores or gum deposits on the shaft and in the bores The unloader arm of the choke shaft may also bind on the fast idle link inside the choke housing Bend the unloader arm away from the fast idle link to obtain clearance Inspect the baffle for binding and correct installation The choke shaft arm must extend through the small circular hole in the outer revolving baffle The cho
38. Motors CORPORATION HUDSON AUTOMOTIVE TECHNICAL SERVICE KELVINATOR NASH AUTOMOBILES AND LEON ARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE E Da e recs MILWAUKEE 7 WISCONSIN HZ 56 6 HD 56 6 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS February 6 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS SERVICE DEPARTMENT IGNITION COIL PRIMARY RESISTANCE UNIT 1956 RAMBLER AND HORNET V 8 SERIES It is possible that an interchange of ignition primary circuit resistors occurred in production on some units and may also occur during field service replacement The use of an incorrect resistor will result in either a miss at high speed or a burning of breaker points with resultant short life depending on how the resistors are used The identification and model applica tion of the resistors are listed below Rambler Series Delco Remy Part Number 1927809 American M otors Part Number 3145124 1 40 1 62 ohms resis tance Delco Remy trade mark stamped on attaching screw lug of resistor Hornet V 8 Series A uto lite Part Number PU 4001 American M otors Part Number 3146659 665 735 ohms resistance Stamped with the A uto lite trade mark Y ours very truly F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE RKEIVINATOR AN D EO M A R D HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 328
39. NTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE RE VIA OR AN D EO M A RE D HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 11 000 FRAME SPRINGS SHOCK ABSORBER MUD PANS February 7 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT FRONT SHOCK ABSORBER LOWER ANCHOR BOLT TORQUE 1956 RAMBLER SERIES Please refer to Page 5 Front Suspension Steering Gear Section of the 1956 Rambler Series Technical Service M anual The Rambler Series front shock absorber lower anchor bolt nut torque has been revised to 90 100 F oot Pounds Previously 150 175 Foot Pounds torque was specified for all 10 40 60 and 80 Series Y ours very truly F H Brodek Technical Service M anager F H B rodek ctp PRINTED IN U S A HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS a m AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE KEIVINATOSR AND LEONARD 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONMSIN HZ 56 1 HD 56 1 File Under GROUP 13 000 WEATHER EYE SPEEDOMETER INSTRUMENT PANEL January 19 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT INSTALLATION INSTRUCTIONS FORM 1 492 WEATHER EYE INSTALLATION KIT PART NUMBER 3119719 1956 RAMBLER SERIES As a matter of i
40. ORATION AUTOMOTIVE TECHNICAL SERVICE n Rode HASH AUTOMOBILES AND LEOWN HOSON 3280 SOUTH CLEMENT AVENUE Wu ya ich MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 1 000 ENGINE December 23 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT ENGINE REAR SUPPORT HANGER REINFORCEMENT 1956 RAMBLER SERIES CAMPAIGN Rambler Series Prior to Serial Number D 278100 Effective at car serial number D 278100 a rear engine support hanger reinforcement Part Number 3415464 is being welded to the body side sill and hanger This reinforcement two per car MUST be installed on all Rambler models prior to the above serial number Support the engine and disconnect the crossmember at the side sills lower sufficiently to install the rein forcements between the crossmember and side sill Arc weld edges of the reinforcement to the side sill and support hanger The installation of this reinforcement should be performed in conjunction with the installation of the rear shook absorber upper reinforcement and lower mounting bracket brace as out lined in Service Letter 2 56 1 and HD 56 1 filed under Group 11 000 Credit will be allowed for material at Dealer not plus 10 per cent and labor at 65 per cent of the Flat Rate Time listed below based on the Dealer L abor M ultiple on record with each Zone NUMBER OPERATION SERIES TIME SH 101 INSTALL REAR SHOCK ABSORBER UPPER MOUN
41. PS ALL HUDSON DEALERS ZONES AND DISTRIBUTORS May 25 1956 ATTN SERVICE DEPARTMENT DISTRIBUTOR CHANGES IN IDENTIFICATION AND SPECIFICATIONS 1956 80 SERIES Part Number 6480362 Auto Lite Model IBJ 4001 D single contact entered production at Engine Number 25306 At this point the following specifications were effective Centrifugal Advance Vacuum Advance Engine Degrees and Engine Degrees and R P M Inches Mercury 0 600 0 6 2 700 2 6 3 8 20 1700 12 8 5 6 26 2970 22 11 5 8 28 3400 24 12 1 2 In those cases where pre ignition with the use of premium grade gasolines and where satisfactory results have not been obtained by retarding ignition timing or removal of carbon or other irregularities from combustion chamber areas a conversion kit package Part Number 648460 7 consisting of the vacuum chamber governor weight springs and vacuum spring together with small miscellaneous parts is avail able for installation in Distributor Part 6480362 The installation of Part Number 6484607 will convert Distributor Part 6480362 into Part Number 6489834 Auto Lite Model IBJ 4001 E Distributor Part Number 6480751 Auto Lite Model IDJ 4001 C became effective at Engine Number P 28609 The following specifications apply Governor Advance Vacuum Advance Engine Degrees and Engine Degrees and R P M Inches Mercury 0 600 RPM O 7 20 1700 RPM 20 13 30 4000 RPM
42. T BRACES AND ENGINE REAR SUPPORT HANGER REINFORCEMENTS Includes shock absorber amp R 10 1 8 Hr Y ours very truly F H Brodek Technical Service M anager F H B rodek ctp Attach PRINTED IN USA American Motors Technical Service Att 56 3 Litho in M S A FIGURE 1 Absorber Lower Mounting Bracket Brace FIGURE 2 Shock Absorber Upper Mounting Reinforcement AMERICAN Motors Corporation HUDSON AUTOMOBILES heat i E E Lv IN AT D RB AUTOMOTIVE TECHNICAL SERVICE MASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 2 HD 56 2 File Under GROUP 11 000 FRAME SPRINGS SHOCK ABSORBER MUD PANS January 9 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT REAR SHOCK ABSORBER NOISE 40 60 80 SERIES Production inadvertently installed an incorrect rear shock absorber retainer in an undetermined number of cars The incorrect retainer Part Number 3146309 has a 447 457 approximately 15 32 and the correct retainer Part Number 3136432 has a 380 395 diameter hole approximately 25 64 The larger hole in the retainer results in damage to the shock absorber grommet spacer or limit sleeve Part Number 3126324 and over tightening of the grommets Before condemning the shock absorber as being noisy when actually the noise is probably due to the above mentioned condition discard the shock
43. TING AND ENGINE REAR SUPPORT HANGER REINFORCEMENTS Includes shock absorber amp 10 1 6 Hr NUMBER OPERATION SERIES TIME SH 102 INSTALL REAR SHOCK ABSORBER UPPER MOUNTING REINFORCEMENTS LOWER SHOCK ABSORBER BRACKET BRACES AND ENGINE REAR SUPPORT HANGER REINFORCE MENTS Includes shock absorber R amp R 10 1 8 Hr Y ours very truly a E j F J a F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A a m AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEOW A RD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS a leat eile Recs APPLIAN ES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 1 000 ENGINE January 9 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT ENGINE REAR CROSSMEMBER BRACE 1956 40 SERIES Effective at Wasp car serial number W 9443 Part Numbers 314201 5 and 3142016 Engine R ear Cross member B race has been eliminated on all Hydra M atic equipped cars without power steering These therefore should not be considered as car shortage material Y ours very truly SAX Ps J a eT a F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A ne a E a Ty i a AMERICAN Motors CORPORATION HUDSON AUTOMOBILES a VIN A AUTOMOTIVE TECHNICAL SERVICE
44. UIDS Only qualified A utomatic Transmission Fluids Type All such as A merican M otors A utomatic Drive Fluid should be used in all Automatic Transmissions Qualified fluids will have Type plus the Armour Identification Number AQ A TF plainly marked on the con tainers Unqualified fluids which do not have this identification may be of inferior quality and their use may seriously damage an A utomatic T ransmission The warranty on Automatic Transmissions is predicated on the use of original equipment fluids or other A utomatic Transmission Fluids Type A qualified by the A rmour Research Foundation A number of fluid additives for A utomatic Transmissions have been offered on the retail market These fluids could reduce the coefficient of friction of the clutch plates causing a slippage and premature failures Also these fluids may contain compounds that could cause the formation of varnish or corrosive agents Therefore we strongly advise against the use of any fluid additives in Automatic Transmissions Y ours very truly CI ID F H Brodek Technical Service M anager F H B rodek ctp PRINTED IN U S A AMERICAN MOTORS CORPORATION HUDSON AUTOMOBILES AUTOMOTIVE TECHNICAL SERVICE KELVINATOR NASH AUTOMOBILES 3280 SOUTH CLEMENT AVENUE ANDLEONARD SPECIAL PRODUCTS APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 22 HD 56 22 File Under GROUP 6 000 TRANSMISSION November 26 1956 ALL HUDSON DEALERS ZONES AND DISTRI
45. UTH CLEMENT AVENUE FRIqXN ES MILWAUKEE 7 WISCONSIN HZ 56 8 HD 56 8 File Under GROUP 1 000 ENGINE May 21 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR MAIN BEARING TORQUE SPECIFICATIONS 1956 SPECIAL V 8 50 SERIES A change in the rear main bearing cap torque has been made to reduce the possibility of the cap being distorted The Technical Service Manual Supplement states 80 85 Foot Pounds torque for all main bearing cap screws The rear main bearing cap torque only has been changed to 50 55 Foot Pounds torque Please note this revision in your copies of the 1956 Special V 8 Technical Service Manual Supplement F H Brodek ctp PRINTED IN U S A Yours very truly C fs LIC P a al i F H Brodek Technical Service Manager HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS AMERICAN Motors CORPORATION AUTOMOTIVE TECHNICAL SERVICE KELVINATOR AND LEON A R D 3280 SOUTH CLEMENT AVENUE FRIqXN ES MILWAUKEE 7 WISCONSIN HZ 56 9 HD 56 9 File Under GROUP 1 000 ENGINE May 18 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT CYLINDER HEAD CORROSION AND LEAKAGE 1955 56 HORNET 6 SERIES Evidence indicates that a great share of aluminum cylinder head leakage and corrosion is caused by improper sealing at the cylinder head to block parting surface A most important factor in the New Car Get Ready Inspection i
46. UTORS ATTN SERVICE DEPARTMENT REAR BEARING RETAINER OIL SEAL HY DRA MATIC TRANSMISSION Rear Bearing Retainer Oil Seal Part Number 311 4778 Group 6 650 manufactured by Chicago Rawhide M fg Co and National Mfg Co is being supplied for all Hydra M atic transmissions 1950 through and including 1956 The assembly of these seals by the vendors differ when installing the rubber spring and felt in the outer shell American M otors Technical Service Att 56 19 illustrates both seals Therefore when replacing oil seals the felt portion should always be positioned towards the rear of the transmission Y ours very truly y j om E d F an ota gt tu F H Brodek Technical Service M anager F H B rodek ctp Attach PRINTED IN U S A American Motors Technical Service Att 56 19 Litno in U S A PART NUMBER 311 778 REAR BEARING RETAINER OIL SEALS a T pue s AMERICAN Motors Corporation HUDSON AUTOMOBILES MEAM A E V A TOE AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND LEONARD MILWAUKEE 7 WISCONSIN HZ 56 14 HD 56 14 File Under GROUP 6 000 TRANSMISSION ALL HUDSON DEALERS ZONES AND DISTRIBUTORS May 17 1956 ATTN SERVICE DEPARTMENT REAR BEARING SNAP RING FAILURE STANDARD TRANSMISSION 1955 56 40 SERIES Exceptional heavy duty operation and or misadjustment of the torque tube trunnion may result in break age of the
47. Wick Pion Plate and Push Rod Seal Assembly Push Rod 6 Rear Packing Plate 2 Washer 7 Wick 3 Front Packing Plate 8 Ring 4 Seal 9 Retainer Plate 5 Packing 10 Nut FIGURE 10 Disassembly of Power Piston Removal of Air Cleaner Valve Cover and Diaphragm From End Plate Disengage outer snap ring and remove retainer and air cleaner hair Disengage inner snap ring and remove spring re tainer and atmospheric poppet spring To insure proper reassembly scribe alignment marks between valve cover and end plate Remove valve cover retaining screws and separate valve cover diaphragm assembly and gaskets from end plate Remove hose and elbow assembly from valve cover Fig 11 American Motors Technical Service Att 156 4 Page 11 Outer Snap Ring 8 Valve Cover Assembly 2 Retainer 9 End Plate 3 Hair 10 Diaphragm Assembly 4 Inner Snap Ring 11 Gasket 5 Spring Retainer 12 External Tube 6 Spring 13 External Hose 7 Screw FIGURE 11 Removal of Air Cleaner Valve Cover and Diaphragm From End Plate Disassembly of End Plate Remove seal from slave cylinder bore in end plate Fig 12 Remove snap ring stop washer retainer cup and push rod washer Remove leather seal and bleeder screw from end plate With a 1 1 8 socket remove control valve fitting assem bly from end plate Disassembly of Control Valve Filling Remove fitting seal from control valve fitting Using pliers J 5403 disengage snap ring
48. a Y INNATO AUTOMOTIVE TECHNICAL SERVICE 2 E E HASH AUTOMOBILES AND LEON AR D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 2 000 COOLING SYSTEM December 22 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT WATER PUMP SEAL CARTRIDGE LUBRICATION 35610 SERIES A external lubrication fitting has been reinstalled in recent production water pump seal assemblies Ef fective car serial numbers are not available Lubricate with W ater Pump Lubricant at 5000 mile intervals USE HAND GUN ONLY Y ours very truly CAU F H Brodek Technical Service M anager F H B rodek ctp PRINTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEOW A RD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS November 15 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS IGNITION TIMING 1956 RAMBLER SERIES Effective at Engine Number B 2461 Rambler Series ignition timing has been revised to T D C This will result in improved low speed engine performance Prior to the above engine numbers paint mark the vibration dampers and set ignition timing to the new specification T D C Y ours very truly CI ZZ F H Brodek Technical Service M anager F H Brodek Ctp
49. absorber grommet spacer or limit sleeve When tighten ing the assembly after the sleeve has been eliminated do not compress the shock absorber grommets Where the spacer has been discarded in service it is not necessary to install retainer Part Number 3136432 This condition has been corrected in production in cars built after car serial numbers W 9223 X 8850 and 8 764 Yours very truly 7 Brodek F H Brodek Technical Service Manager ctp PRINTED IN U S AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE Ier A H D LEO NH A RD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 11 000 FRAME SPRINGS SHOCK ABSORBERS MUD PANS February 1 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR SHOCK ABSORBERS 1956 RAMBLER SERIES Effective at car serial number D 287222 a revised shock absorber mounting bracket was Incorporated in production A longer shock absorber Part Number 3119822 is required with the use of this bracket The new shock absorber incorporates a shoulder on the bayonet end to prevent over tightening the shock absorber grommets The first type shook absorber should not be used on cars built after the aforementioned serial number Y ours very truly F H Brodek Technical Service M anager F H B rodek ctp PRI
50. act with mineral oil gasoline or kerosene When overhauling the unit always use repair kits Removing Vacuum Cylinder From End Plate To insure proper reassembly scribe alignment marks on the end plate and cylinder shell Slide hose off vacuum tube Remove the nuts and lockwashers from the hook bolts and disengage them from cylinder shell Remove cylinder shell and rubber gasket from end plate If shell sticks to end plate a fibre or plastic mallet may be used to tap the end plate loose Do not tap the cylinder shell Removing Slave Cylinder and Vacuum Check From End Plate With a 1 1 4 end wrench loosen the slave cylinder tube nut and unscrew slave cylinder tube assembly from the end plate Remove the vacuum check valve from end plate with a 1 1 8 wrench Disassembly of Slave Cylinder Remove slave cylinder tube nut from tube Clamp end plug in vise and with end wrench on of cylinder tube remove tube and gasket Remove bleeder screw from end plug Fig 6 American Motors Technical Service Att 56 4 Page 7 1 Bleeder Screw 4 Tube 2 End Plug 5 Tube Nut 3 Gasket FIGURE 6 Slave Cylinder Disassembly Disassembly of Vacuum Check Valve Remove snap ring from valve body and lift out spring retainer spring and check valve ball Fig 7 1 Snap Ring 4 Bal 2 Retainer 5 Valve Body 3 Spring FIGURE 7 Vacuum Check Valve Disassembly American Motors Technical Service Att 56 4 Page 8 Removal of Sla
51. amper 1 477 Page 5 2 4386041 Heater and Defroster Damper Rod Washer 2 4386559 Heater and Defroster Damper Rod Grommet 1 4386331 Bracket 1 4386332 Bracket 2 GM 186469 Bracket Screw Install heater and defroster duct assembly to dash panel with screws 443946 NOTE It may be necessary to trim away portions of dash insulation to properly mount heater and defroster duct and water control valve assembly Install right and left hand defroster tubes to the defroster nozzles and right hand heater duct Place heater damper control assembly 4386365 with the mounting bracket up which is the position when installed on instrument panel Move the control lever to the extreme left position Install cowl vent control cable 4386255 to heater damper control assembly Use control cable clamp 4386367 and screw GM 178781 The loop of the cable is attached to the single pin on the underside of the control and the cable housing is clamped to the bracket on the underside that lines up with the pin Heater and defroster air damper control cable 4386256 15 installed to the right hand pin single pin on the upper side of the control The cable loop is installed on the pin and the housing is clamped with control cable clamp 4386367 and screw GM 178781 to the bracket welded on the upper side of the control NOTE The loops of both cables are installed with the cable next to the control and the three loop windings to the outside of the pins The housi
52. and remove piston stop washer Push piston out of bore of fitting and remove hydraulic cup from piston American Motors Technical Service Att 156 4 Page 12 2 Ll TU CENT E j m l 1 ZZ Push Rod Seals Assemb led 1 Snap Ring 9 Seal 2 Stop Washer 10 Snap Ring 3 Valve Fitting 11 Stop Washer 4 Seal 12 Retainer 5 Piston 13 Cup 6 Cup 14 Push Rod Washer 7 Control Valve Fitting 15 End Plate Assembly 16 End Plate Leather 8 Bleeder Screw Seal FIGURE 12 Disassembly of End Plate and Control Valve Fitting CLEANING AND INSPECTION Thoroughly wash al I parts in alcohol Use air pressure to remove fluid from all internal passages Inspect the following parts for wear or damage Vacuum cylinder shell If rust or corrosion is found in bore it can be removed with fine emery cloth Slave cylinder tube bore Vacuum check valve ball seat Power piston push rod Slave cylinder piston check valve ball seat Vacuum and atmospheric rubber poppets in valve cover Control valve fitting End plate bore All seal and gasket surface areas to insure proper seal upon reassembly American Motors Technical Service Att 56 4 Page 13 REASSEMBLY OF HYDROVAC Basically the reassembly of the Hydrovac is the exact reverse of the disassembly procedure outlined on previous pages However to insure proper reassembly additional information is listed on the following pages All hydraulically operated parts should
53. ce on individual engines To improve the Model WGD 2231 S carburetor warm up characteristics the vacuum piston spring Carter 61 226 has been superseded by spring Part 61 332 which has an increased tension The metering rods Carter 75 1166 have also been revised incorporating a 003 smaller power step The revised rods are identified by the letter embossed on the flat surface below the eye of the rod The above spring change was incorporated in the WGD 2231 SA carburetors with the code letters M 5 or higher on the brass identification tag The metering rod change was incorporated in all WGD 2231 carburetors effective at Engine Number P 24900 A M C Part Number 3119697 Carter Part Number 75 1271 U consisting of one vacuum piston spring and two revised metering rods may be installed in the WGD 2231 S carburetors which were used prior to Engine Number P 24900 Yours very truly Z ZZ F H Brodek F H Brodek Technical Service Manager ctp PRINTED IN S A AMERICAN Motors Corporation HUDSON AUTOMOBILES a Y INNATO AUTOMOTIVE TECHNICAL SERVICE 2 E E HASH AUTOMOBILES AND LEON A RE D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM January 19 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT ROUGH ENGINE IDLE WHILE WINDSHIELD WIPERS ARE OPERATING 1956 RAM
54. der GROUP 13 000 WEATHER EYE SPEEDOMETER INSTRUMENT PANEL February 23 1956 ALL HUDSON DEALERS ZONES amp DISTRIBUTORS ATTN SERVICE DEPARTMENT BELT MISALIGNMENT ON IDLER PULLEY 1956 RAMBLER SERIES ALL SEASON AIR CONDITION EQUIPPED There may be some cases where belt misalignment may be caused by the cast aluminum adjusting plate bracket not being correctly finished The two 1 3 411 diameter bosses on the front of this bracket may not be flat consequently the idler pulley mounting bracket or if equipped with power steering the idler and power steering pump pulley bracket is misaligned in turn misaligning the belts Filing the bosses flat would correct this problem of misalignment This is considered under control in production effective with Engine Numbers B 23035 and DB 5886 This will not necessarily apply to all cars with engines built prior to the aforementioned serial numbers as the condition was the result of a change in manufacturing procedures Y ours very truly Atte F H Brodek F H B rodek Technical Service M anager ctp PRINTED IN U S A
55. e slave cylinder and is ported through the open ball check valve and out to the wheel cylinders At the same time this fluid is being ported inter nally to the control valve As this pressure increases it moves the control valve piston contacting the diaphragm seat against the vacuum poppet closing off the vacuum supply This movement automatically opens the atmospheric poppet and allows atmosphere to pass into the valve chamber and through the externally mounted tube to the opposite side of the power piston This creates a pressure differential across the power piston which causes the power piston to move against the slave cylinder piston Initial movement of the slave cylinder piston causes the operating yoke to seat the ball check valve trapping fluid in the outlet side of the slave cylinder Fig 5 The fluid now under pressure from the master cylin der and from movement of the power piston 15 transmitted to the wheel cylinders I Tube 2 End Plate Internal Passage 3 Control Valve Piston 4 Diaphragm 5 Vacuum Poppet 6 Atmospheric Poppet 7 Spring 8 Air Cleaner 9 Power Piston pum FUR American Motors Technical Service Att 156 4 Page 5 CZI VACUUM ATMOSPHERE BRAKE FLUID 10 Spring 11 Vacuum Check Valve 12 Hydraulic Port From Master Cylinder 13 Slave Cylinder Operating Yoke 14 Slave Cylinder Piston 15 Slave Cylinder Ball Check Valve 16 Hydraulic Port to Wheel Cylinders FIGURE 4 H
56. embly is included in all kits for the 1955 series transmissions This converter shaft Part Number 6484522 MUST be used when a new pump or a new forty 40 tooth Spline rotor set is to be used in an original pump body to insure proper oil supply to the high range clutch For all 1956 Series transmissions prior to transmission Serial Number P 6969 at which point the forty 40 tooth spline shaft and pump rotor became effective the following parts are to be used and are not interchangeable with the 1955 Series transmissions with the exception of Part Number 6489367 rotor assembly PART NUMBER DESCRIPTION 6489367 Rotor Assembly 6489366 Pump Assembly 6489467 Converter Shaft Assembly 6484524 Pump A ssembly and Converter Shaft K it Y ours very truly stu F H Brodek Technical Service M anager F H B rodek ctp Attach PRINTED IN USA ZZ zZzZz z LZAXZU 2rtm gt a oe K VSS ZZZZZZ212ZZZ k NR Y WK i TSK k wu w American Motors Service Att 556 7 Litho in 7 5 4 LE DIA HOLES a 5 E T X c AMERICAN Motors CORPORATION HUDSON AUTOMOTIVE TECHNICAL SERVICE KELVINATOR NASH AUTOMOBILES AND LEON ARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE E Da e recs MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 6 000 TRANSMISSION February 8 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT HY DRA MATIC TRANSMISSION
57. er Noise HZ 56 3 Rear Shock Absorbers HZ 56 4 Front Shock Lower Anchor Bolt Group 13 000 Weather Eye Speedometer Instrument Panel HZ 56 1 Weather Eye Install Instructions HZ 56 2 Weather Eye Circ w o AC HZ 56 4 Speedometer Noise 1956 Rambler HZ 56 5 Install Inst Weather Eye Form I 477 HZ 56 6 Belt Misalighnment Idler Pulley AMERICAN Motors Corporation HUDSON AUTOMOBILES K YIN A i AUTOMOTIVE TECHNICAL SERVICE en dV ide ee ae HASH AUTOMOBILES AND E N A R D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 1 000 ENGINE December 12 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS VIBRATION DAMPER 1956 RAMBLER SERIES A knocking noise which may be diagnosed as bearing noise may exist on cars built prior to Engine B 3597 on the Rambler Series This noise may be due to faulty vibration damper cushions as a result of improper assembly W here an engine noise similar to a bearing rap occurs on cars built prior to the above engine number the vibration damper should be checked before any major disassembly of the engine Correction would involve correct installation of cushions 28576 disc 3110580 and rubber 3110597 Refer to the Technical Service M anual for correct assembly of parts Y ours very truly Le F H Brodek Technical Service M anager F H Brode
58. ew Heater Water Valve Screw Heater Water Valve Capillary Tube Motor Wheel Heater and Defroster Motor Plate Heater and Defroster Motor Mounting Gasket Heater and Defroster Motor Mounting Round 5 I D Insulator Heater and Defroster Motor 1 5 8 1 D 3 32 thick Grommet Heater and Defroster Motor Support 3 16 I D 7 64 thick Resistor Heater and Defroster Motor Speed Control Strap Heater and Defroster Motor Ground Wires Heater and Defroster Motor to Heater Switch Washer Heater and Defroster Motor to Mounting Plate Lock Nut Heater and Defroster Motor to Mounting Plate Washer Heater and Defroster Motor Mounting Grommet Screw Heater and Defroster Motor Mounting Plate to Blower Hose Heater Core to Heater Valve Hose Cylinder Head to Control Valve Hose Heater Core to Water Pump Clamp Heater Hose Nipple Water Pump Nipple Cylinder Head 1 492 Page 2 QUANTITY PART NUMBER DESCRIPTION 1 3146524 Switch 1 3128826 Nut Heater and Defroster Switch 1 3411554 Knob Heater Switch 1 3146673 Damper Less Rod Inc Rubber Insert 2 3146671 Rod 2 3146238 Bracket 2 GM 125591 Screw 2 8000093 Screw Rod Bracket to Dash 2 8000145 Washer Grommet 2 4386559 Grommet Damper Rod 1 3146781 Hose Defroster 4 7 16 Length 1 3146412 Lever Incl Cable Less Knob 1 3411553 Knob Water Valve Control Lever 2 GM 181561 Screw Heater Control Lever Assembly 2 GM 121753 Washer Heater Control Lever Assembly 1 3146538 Cable 5
59. f the radio to reduce this voltage with a resistor in stalled in series with the dial light The dash panel opening for the panel light plug in contact has been enlarged to prevent shorting at that point At time of service the radio receiver should be removed by the servicing dealer and taken to the nearest authorized Motorola Service Outlet They have been informed of the problem and are instructed to check the receiver install the 270 000 ohm resistor if not so equipped and replace the panel light dial unit Upon reinstallation of the dial observe caution that the insulating sleeve on the panel light plug in con tact be in good condition and located in such a manner as to prevent a short circuit at the dash opening Yours very truly Lin r ia s gt zu F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEO NM ARD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 10 HD 56 10 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS February 13 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT DISTRIBUTOR ASSEMBLY 1956 80 SERIES The dual contact distributor Part Number 6471072 uto lite B 4001 B 6 volt type and Part Number 6480362 uto lite 4001 0 12 volt type are so similar in centrifu
60. gal and vacuum ignition advance curves that they could be interchanged without a noticeable effect on vehicle performance For this reason a number of 1956 Series were built with the IB K 4001 B distributors before the later IB 4001 D distributors were incorporated at Engine Serial P 25306 For service testing specifications consult the 1956 T echnical Service Supplement when working with distributor 18 4001 0 and the 1955 Technical Service M anual when servicing the IB K 4001 B distributor Y ours very truly CAU 2 Ce ez 3 F H Brodek Technical Service M anager F H Brodek ctp PRINTEDIN U S A a a E pamm T s AMERICAN Motors CORPORATION HUDSON AUTOMOBILES Ei AUTOMOTIVE TECHNICAL SERVICE Fd POOR HASH AUTOMOBILES AN D LEQN ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 11 HD 56 11 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS ALL HUDSON DEALERS ZONES AND DISTRIBUTORS February 21 1956 ATTENTION SERVICE DEPARTMENT INSTRUMENT PANEL CLUSTER REMOVAL 1956 RAMBLER SERIES REFER TO BULLETIN HZ AND HD 56 1 FILED UNDER SERVICE GENERAL The following procedure is suggested for Instrument Panel Cluster Removal on the 1956 Rambler Series Air Conditioning Equipped Disconnect battery If car is equipped with overdrive remove bolt holding control cable bracket to dash and place cable out of the way Remove ash tray and it
61. he Flashaway transmission has been encountered The 1956 Technical Service M anual Special V 8 Supplement Page 100 Figure 145 shows the lower T V rod measurement as 15 1 4 from center of holes at each end of rod Prior to final release for production the T V lever was changed from a forging to a metal stamping Therefore please correct the measurement shown in Figure 145 to read 16 1 8 plus 000 minus 1 32 TheT V lever should measure 5 9 15 as shown in Figure 144 A fter checking the measurement of the lower T V rod and the T V lever follow the instructions as out lined in the M anual under the heading of Throttle Linkage A djustment If shift pattern is too high or low after correcting the T V linkage refer to Diagnosis Guide for possible cause Y ours very truly CHEST F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A AMERICAN Motors Corporation HUDSON AUTOMOBILES m E M A AUTOMOTIVE TECHNICAL SERVICE Kh W HASH AUTOMOBILES AN D LEON ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 10 HD 56 10 File Under GROUP 6 000 TRANSMISSION ALL HUDSON DEALERS ZONES AND DISTRIBUTORS April 26 1956 ATTN SERVICE DEPARTMENT SLIPPING IN REVERSE 1956 FLASHAWAY TRANSMISSION It has been found that under certain conditions a slip in reverse can occur in the 1956 Flashaway transmission This can be caused by
62. he seal together with changes in the curing of the rubber The new seal is identified by the letters stamped on the metal retainer Yours very truly Technical Service Manager F H Brodek ctp PRINTED IN U S A a T s AMERICAN Motors Corporation HUDSON AUTOMOBILES i K V iN AUTOMOTIVE TECHNICAL SERVICE M d NASH AUTOMOBILES AND LEON ARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 3 File Under GROUP 9 000 REAR AXLE PROPELLER SHAFT April 25 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR AXLE PINION CONE SETTING 1956 10 40 60 AND 80 SERIES The method of adjusting the rear axle pinion gear has been revised in production on all rear axle ratios The previous method of installing pinion depth adjusting washers directly behind the pinion gear has been changed The pinion depth adjusting washer is now installed in the rear axle housing behind the rear pinion bearing cup The rear face of the pinion gear is also machine ground to enable a pinion depth adjustment check after assembly Effective serial number points are not available Disassembly and location of adjusting shim will determine the procedure required to perform pinion depth adjustment The method of adjusting the pinion depth is outlined in the 1955 Technical Service Manual
63. i F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN U S A AMERICAN Motors Corporation HUCSON AUTOMOBILES ca W I MN 4 AUTOMOTIVE TECHNICAL SERVICE ie ELE HASH AUTOMOBILES AN D LEON ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 10 000 FRONT AXLE FRONT SUSPENSION STEERING GEAR May 18 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT DAMAGED FRONT TIRES DUE TO IMPROPER TURNING RADIUS MODELS 35660 80 In order to avoid the possibility of damaging front tires as a result of tires contacting the brake hose bracket during tight right or left turn the turning radius should be checked as noted on New Car Delivery Inspection Form No F 1942 The inside wheel on right or left turns should be adjusted to a maximum turn angle of 38 on Rambler Series and 36 on all other Series In addition to adjusting the turn angle to the specified limits it is recommended to trim the rear corner of the brake hose brackets approximately 1 8 to prevent possible tire damage under abnormal turning conditions such as steep driveways Effective April 11th the front brake hose brackets have been reworked in production Serial Numbers are not available Yours very truly j Cy PER w IPC g aum Brodek Technical Service Manager F H Brodek ctp PRINTED IN U
64. ical Service M anager PRINTED IN U S A ne a E p d a Ty E AMERICAN Motors CORPORATION HUDSON AUTOMOBILES E V E NM ATOR AUTOMOTIVE TECHNICAL SERVICE HASH AUTOM OBILES A D L E M R D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIAN CE 5 MILWAUKEE 7 WISCONSIN HZ 56 1 HD 56 1 File Under GROUP 6 000 TRANSMISSION February 3 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPT ULTRAMATIC TRANSMISSION THROTTLE VALVE LINKAGE ADJUSTMENT 1955 56 80 SERIES To insure proper shift pattern on the 1955 5680 Series U Itramatic transmission throttle linkage measurement and adjustment of rods and levers must be correctly set to factory specifications American M otors Technical Service A tt 256 6 illustrates the dimensions of the rod The carburetor throttle rod from the carburetor to the lever at the vertical rod must be 15 1 2 from center of ball pivot at carburetor to L bend at rear and of rod Fig 1 The adjuster rod that is connected to the carburetor throttle rod and to the lever of the cross shaft must be 6 9 16 from center to center of ends of rod If the rod is either too long or too short bend rod at present bend to obtain the correct length of 6 9 16 The T V rod from the cross shaft lever to the T V lever at the transmission must be 26 1 8 from center of pins This rod must also be bent to obtain the correct measurement Fig 2 The T V
65. ion Part Number 3147290 to the left side of the housing Install cover Part Number 3146751 on heater housing using screws removed when removing original cover which was discarded Install front insulation Part Number 3147289 on cover using fasteners Part Number 3147299 Install heater and defroster insulator Part Number 3147288 on heater motor Install grommets Part Number 3147287 on each bolt of the heater and defroster motor Part Number 3146672 Install heater and defroster motor ground strap with the round hole to one of the motor bolts The heater and defroster motor is then installed on the mounting plate Part Number 3410148 with lockwasher Part Number GM 131096 and nuts Part Number GM 120614 Install heater and defroster motor wheel Part Number 3146570 on the heater and defroster motor shaft Cement the heater and defroster mounting plate gasket Part Number 3147277 to the blower housing Line up the holes of the gasket with the holes in the housing Install the motor and mounting plate to the blower housing with screws Part Number 8000093 Install heater and defroster motor speed control resistor Part Number 3146695 beneath one of the screws used to mount the blower motor and plate to the housing The elongated hole of the ground strap 1 also secured with this screw The other end of the resistor is secured with screw Part Number 8000093 to the existing hole in the blower housing Install the motor lead into the
66. ition and install the Boden wire loop on the damper rod and secure the cable housing in the bracket with damper cable clamp Part Number 3130267 and screw Part Number 163985 Install the water control valve lever assembly Part Number 3146412 by inserting into slot in control panel from the rear of the instrument panel Use screws Part Number GM 181561 and lockwashers Part Number GM 121753 to install the lever assembly to the lower edge of the instrument panel the cage nuts are already installed in the instrument panel 1 492 Page 5 Install knob Part Number 3411553 on the lever place the lever in the OFF position place the water control valve in the OFF position and install the Baden Wire loop on the water control valve bell crank The cable housing 1s held in place by the clamp and screw on the water control valve bracket Check the operation by moving t e control from left to right to be certain that the water valve is off when the lever is in the OFF position Fill the radiator and connect the battery Start the engine and with water valve open and radiator cap removed run until air is bled from cooling system Top off radiator to full capacity and install cap Check operation of heater and blower and check for leaks Suggested Flat Rate Time 3 0 Hours HUDSON AUTOMOBILES E EI LE n _ a E p d a Ty E AMERICAN Motors CORPORATION s VW HM AUTOMOTIVE TECHNICAL SERVICE Eri PUE YN
67. ive spacers now have an optional method of manufacture on all 1956 Flashaway transmissions The optional spacers incorporate an open end and are used interchangeably with the solid type The bright finish specification on both type spacers has been removed Yours very truly CN S a P at J 5 f Ce 2 ez F H Brodek Technical Service Manager Attach PRINTED IN U S A American Motors Technical Service Att 56 17 litho in U S A REAR INTERNAL GEAR IDENTIFICATION MARK ASSEMBLE TOWARD REAR CLUTCH BACKING PLATE I k 1 Litho in U S A Technical Service Att 56 17 American Motors Fage 2 LIVHSNIVW 932 NAS LINN Hv3WH NMOHS SV LNIOd llli dd ONINIVLNOD 391 3 IgW34ssv American Motors Technical Service Att 56 17 Page 3 Litho in U S A FRONT SEAL INSTALLATION FLYWHEEL HOUSING ASSEMBLY 7 M Lu Yeer p SASS SS f SSS ff A f ZZ W M NN WOOD BLOCK FLYWHEEL HOUSING CORRECT STAKING ASSEMBLY u SEAL a 5 E pue a T s AMERICAN Motors Corporation HUDSON AUTOMOBILES MEAM A E V A TOE AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND LEONARD MILWAUKEE 7 WISCONSIN HZ 56 13 HD 56 13 File Under GROUP 6 000 TRANSMISSION May 16 1956 ALL HUDSON DEALERS ZONES AND DISTRIB
68. k ctp PRINTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEO NM ARD HUDSON AUTOMOBILES NASH AUTOMOBILES M nsBk PRE Ure 3280 SOUTH CLEMENT AVENUE FRIqXN ES MILWAUKEE 7 WISCONMSIN HZ 56 2 HD 56 2 FileUnder GROUP 1 000 ENGINE December 13 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS TIMING COVER OIL SEAL LEAKAGE V 8 SERIES HORNET A n oil leak at the front timing chain cover oil seal may result from a lack of an interference fit of the seal in the cover This would permit the seal to turn with the crankshaft To effect a correction for this condition the following procedure is recommended Remove timing chain from engine Pry out old seal assembly from engine side of cover Drill two 11 64 holes at location illustrated in Figure 1 American M otors Technical Service A tt 256 2 Install new oil seal with Tool 5983 Upset the seal material into holes with a blunt pointed punch as shown in Figure 2 A correction is being incorporated in production Y ours very truly C7 TAA F H Brodek Technical Service M anager F H B rodek ctp Attach PRINTED IN U S A American Motors Technical Service Att 56 2 Litho in U S A FIGURE 1 Approximate Location of 11 64 Diameter Holes Drilled in Timing Chain Cover FIGURE 2 Upset Seal Material Into Drilled Holes in Cover a a E pamm T X AMERICAN Motors CORP
69. ke piston must be free fit in its bore The air horn may be distorted due to over tightening the carburetor air cleaner The air horn may become distorted in either the full open or closed position depending on the choke valve position at the time of installation of the air cleaner Inspect the choke heat tube for obstruction which will prevent or reduce the volume of warm air from circulating in the coil housing a m AMERICAN Motors Corporation HUDSON AUTOMOBILES E E E VIN Tol AUTOMOTIVE TECHNICAL SERVICE EI d HASH AUTOMOBILES AN D E N A R D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONMSIN HZ 56 2 HD 56 2 File Under GROUP 4 000 FUEL CARBURETION EXHAUST SYSTEM December 29 1955 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATT SERVICE DEPT 1956 RAMBLER SERIES CARBURETOR SPECIFICATIONS MODEL AS 2349 S The fast idle adjustment as measured between the throttle valve and the carburetor bore must be 043 Gauge T 109 158 The unloader adjustment must be 3 16 Please note the above in your 1956 Series Rambler Technical Service Manual Yours very truly ee F H Brodek F H Brodek Technical Service Manager ctp PRINTED IN U S Be sure the coil is set properly to the index specifications In some instances deviating approximately one notch either rich or lean may provide slight improvement for starting and warm up performan
70. lace Install heater core to water pump pipe hose 3143877 with hose clamps 3122345 Install control valve to lower heater core outlet hose 3143045 with clamps 3122345 Install cylinder head elbow 3135396 into right hand side of cylinder head Install cylinder head nipple 3142368 into cylinder head elbow The elbow and fitting should face toward the rear when installed Install control valve to cylinder head nipple hose 3143876 with hose clamps 3122345 1 477 Page 7 Hornet Special V 8 Series Remove pipe plug from water pump Install heater hose water pump nipple 3 142366 Remove pipe plug and install cylinder head heater hose nipple 3142367 in rear of right cylinder head at the throttle mounting bracket Install control valve to upper heater outlet hose 3143045 with clamps 3122345 Cut a piece of bulk hose to fit from control valve to fitting in rear of right hand cylinder head and install with clamps 3122345 Cut a piece of bulk hose to a length to fit from the water pump to the heater core Route the hose along the right hand side of the intake manifold Use clamp 3147731 to secure hose The clamps are installed under the nut holding the pad of intake manifold Also install clamp 3147731 with screw GM 180116 and lockwasher GM 120382 on hose and attach to heater hopper box Install the hose with clamp 3122345 Hornet V 8 Series Remove pipe plug from water pump Remove the plug located in the rear of
71. lace Hose Clean Remove Valve Cover Inspect Diaphragm Poppets and Air Cleaner for Proper Operation Remove Cylinder Shell and Check Power Piston Stroke Find Cause of Leak and Correct Re line Brakes and Adjust Clean or Turn the Drum Remove and Inspect Make Necessary Part Replacements Remove Cylinder Shell and Check Power Piston Stroke Inspect Lining Condition and Make Necessary Correction Bleed System and Refill Master Cylinder Locate Source and Correct Bleed System and Refill Master Cylinder Replace Drum CONDITIONS Brakes Do Not Release Properly PROBABLE CAUSE Hydrovac Internal Hydraulic Broke Fluid Leaks Improper Brake Shoe Adjustment Brake Shoe Return Springs Broken Brake Shoe Binding on Backing Plate Pedal Linkage Binding Master Cylinder Compensating Port Plugged or Covered Hydrovac Control Valve Not Functioning Properly Slave Cylinder Hydraulic Piston Check Ball Not Functioning Properly Power Piston Binding American Motors Technical Service Att 56 4 Page 16 CORRECTION If No Exterior Hydraulic Brake Fluid Leaks are Visible Remove Hydrovac From Car Disassemble and Inspect all Cups and Seals for Possible Leakage Replace Necessary Parts Perform Major Brake Adjustment Replace Springs Lubriplate Points of Contact on Backing Plate Free Up Linkage Inspect Bore and Reservoir for Dirt Check Pedal Linkage for Proper Adjus
72. lack of reverse oil pressure When this condition is encountered the following is recommended REVERSE PRESSURE Check reverse pressure with selector lever placed in the R position With hot oil pressure should be a minimum of 145 P S I at approximately half throttle INTERNAL LEAKS OR RESTRICTIONS Check the passages to the reverse piston for leaks or restrictions Check the passages to the overrun piston for leaks or restrictions When an internal leak or a restricted passage is indicated repair or replace the defective parts and recheck reverse pressure When a low pressure front pump is found it should be replaced Yours very truly p a Jj F iF P gt gtd F H Brodek F H Brodek Technical Service Manager ctp PRINTED IN U S A a T pue X c AMERICAN Motors CORPORATION HUDSON AUTOMOBILES nse VW HM 4 de AUTOMOTIVE TECHNICAL SERVICE ie HASH AUTOMOBILES AN D LEQN ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APP LIRR OES MILWAUKEE 7 WISCONSIN HZ 56 12 HD 56 12 File Under GROUP 6 000 TRANSMISSION ALL HUDSON DEALERS ZONES AND DISTRIBUTORS May 8 1956 ATTN SERVICE DEPARTMENT FLASHAWAY HYDRA MATIC TRANSMISSION 1956 50 SERIES Improved service recommendations and identification of parts now incorporated in production are listed below to insure proper assembly of the Flashaway Transmission FRONT UNIT COUPLING ASSEMBLY
73. loss in ram air defroster action occurs It then may be necessary to operate the blower fan to efficiently defog or de ice the windshield Forced beat continues to be accomplished in the FORCED HEAT control position with the use of the blower fan Suggested alteration time 5 Hours Includes removal of right hand heater duct Y ours very truly F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A ne a E p d a Ty a AMERICAN Motors CORPORATION HUDSON AUTOMOBILES E V E NM ATOR AUTOMOTIVE TECHNICAL SERVICE HASH AUTOM OBILES A D LEO MN R D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIAN CE 5 MILWAUKEE 7 WISCONSIN HZ 56 4 HD 56 4 File Under GROUP 13 000 WEATHER EY E SPEEDOM ETER INSTRUMENT PANEL ALL HUDSON DEALERS ZONES AND DISTRIBUTORS January 27 1956 ATTN SERVICE DEPARTMENT SPEEDOMETER NOISE 1956 RAMBLER SERIES The clicking or oscillating noise found in a speedometer assembly is the result of a bent kinked cable core and or housing conduit A sharp curve in the routing of the soeedometer cable conduit assembly will also cause the clicking or oscillating noise These clicking noises are usually at certain fixed speeds and do not follow the speed changes of the vehicle However on Hydra M atic equipped cars the steel driven gear transmits a gear or machinery noise This iS unlike the clicking condition as it changes with car speed Y o
74. mbler HZ 56 5 Carb Flooding Rambler AS 2349 S Carburetor HZ 56 6 Carb Fuel Economy Rambler AS 2349 S Carburetor HZ 56 10 Intake Manifold 1955 56 80 Series Group 6 000 Transmission HZ 56 1 Ultramatic Trans Throttle Valve HZ 56 2 Front Pump Kits Ultramatic Transmission Group 6 000 Cont d HZ 56 3 Hydra Matic Trans HZ 56 9 T V Linkage Rod Measure amp Adjustment HZ 56 10 Slipping in Reverse Flashaway HZ 56 11 Oil Leaks amp Torus Drainback Flashaway HZ 56 12 Flashaway Hydramatic Transmission HZ 56 13 Rear Brg Retainer Oil Seal Hydramatic HZ 56 14 Rear Brg Snap Ring Fail Stand Transmission HZ 56 20 Modified 5610 Series Trans Shift Pattern HZ 56 21 Automatic Transmission Fluids HZ 56 22 Scraping Noise 1 Reverse 1956 Flashaway Transmission Group 8 000 Brakes amp Wheels Hub amp Drum HZ 56 1 Hydrovac Power Brake Unit HZ 56 2 Rear Wheel Brake Cylinder 1956 Hornet amp Wasp HZ 56 3 Clutch amp Brake Pedal Shaft Lube Fitting Group 9 000 Rear Axle Propeller Shaft HZ 56 1 Rear Axle Pinion Seal 51 55 Rambler Series HZ 56 4 Rear Axle Pinion Cone Setting Group 10 000 Front Axle Front Suspension Steering Gear HZ 56 1 Toe In Adjustment HZ 56 2 Steer Gear Filler Plug HZ 56 3 Damaged Front Tires Mod 80 Group 11 000 Frame Springs Shock Absorber Mud Pans HZ 56 1 Upper amp Lower Shock Mounting HZ 56 2 Rear Shock Absorb
75. n coil polarity The positive primary coil terminal was attached to the distributor insulated contact in error The negative primary coil terminal should be attached to the distributor insulated contact The coils are clearly marked or on the primary coil terminals Improper coil polarity will reduce the efficiency of the ignition secondary coil circuit causing high speed misfiring Distributor point life will also be reduced Please inspect and correct this condition on all cars as required Y ours very truly F H Brodek Technical Service M anager F H Brodek ctp PRINTED IN U S A a T X c AMERICAN Motors CORPORATION HUDSON AUTOMOBILES KELVINATOR AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND LED MH ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIAN CES MILWAUKEE 7 WISCONSIN HZ 56 5 HD 56 5 File Under GROUP 3 000 ELECTRICAL WIRING LAMPS ALL HUDSON DEALERS ZONES AND DISTRIBUTORS January 20 1956 ATTN SERVICE DEPT BACK UP LIGHTS INCORRECTLY WIRED 1956 MODELS Prior to the week of January 7 1956 the back up light circuit may have been wired incorrectly All models should be wired with the circuit feed wire attached to the Aux terminal of the 30 ampere circuit breaker behind the instrument panel left side The circuit breaker is controlled by the ignition switch making it impossible for back up lights to operate with ignition s
76. nformation and record we are attaching a copy of Form Number 1 492 Weather Eye In stallation Instructions F H Brodek ctp Attach PRINTED IN USA Yours very truly CALI Brodek Technical Service Manager Material List QUANTITY Oo O t m m N N me RR N m CN NNN NO PART NUMBER 3410147 8000091 3411927 3411873 3411872 GM 161376 3146696 3146751 3147290 3147289 3147026 3147299 3146619 3125432 3146518 3146319 8000099 GM 111684 3146672 3146570 3410148 3147277 3147288 3147287 3146695 3148510 3147293 GM 131096 GM 120614 8000139 8000093 3146892 3147239 3147238 3122345 3142368 3142364 1 492 INSTALLATION INSTRUCTIONS WEATHER EYE RAMBLER PART 3119719 1956 RAMBLER SERIES DESCRIPTION Support Heater Core R H Screw Heater Core Support Duct Assembly Air Defroster Seal Air Duct to Instrument Panel Speed Nut Defroster Nozzle to Air Duct Screw Air Duct and Defroster Nozzle to Instrument Panel Filter Cover Incl Filter Retainer Spring and Upper and Lower Bracket Insulation Left Side 8 3 10 length 1 2 thick Insulation Front 19 3 4 length 1 2 thick Heater Core Fastener Heater Core Insulation Gasket Heater Core Lower End 4 31 32 length 3 16 thick Seal Heater Core Inlet and Outlet Tube 5 8 3 1 2 thick Valve Seal 3 8 LD 9 32 thick Scr
77. ng is installed in the bracket on the heater duct and secured by clamp 3130267 and screw GM 163985 allowing enough room for control arm movement 1 477 Page 6 Install heat distribution duct 4386403 to toe panel and heater duct using screws 4387764 GM 9406242 and GM 161643 Install glove box Wasp Series Remove pipe plug from top rear central area of cylinder head Remove pipe plug from water pump Install heater hose pipe water pump fitting 171586 Install water pump to heater hose pipe 3143737 into water pump fitting Route along right hand side of engine above manifolds Install clip 3143735 to cylinder head bolt to hold pipe in place Install cylinder head heater nose nipple 3 142364 into location where pipe plug was previously removed Install control valve to lower heater core outlet hose 3143045 with hose clamps 31221 Install heater core to water pump pipe hose 3143877 to the upper heater outlet with hose clamps 3122345 Install control valve to cylinder head hose 31 26330 with clamps 3122345 Hornet Six Series Remove pipe plug from rear right hand side of cylinder head Remove pipe plug from water pump Install heater pipe water pump fitting 171586 Install water pump to heater hose pipe 3143738 into water pump fitting and route along right hand side of the engine and over manifolds to rear of engine Install clip 3143736 on heater pipe and attach to one of the cylinder head bolts to retain pipe in p
78. ng with the one furthest away from the master cylinder LUBRICATION Ordinarily additional lubrication beyond that provided in the manufacturing of the Hydrovac 1 not required However it is advisable that after an initial installation is made in a normal horizontal position the oil level should be checked in the vacuum cylinder Remove 1 8 pipe plug from the end of the cylinder The oil level should be up to the bottom of the pipe plug hole If low fill to the proper level with a suitable vacuum cylinder oil When overhauling a Hydrovac it will be necessary to perform the above procedure prior to operation POSSIBLE DIFFICULTIES AND CORRECTIONS CONDITIONS PROBABLE CAUSE CORRECTION Hard Pedal Glazed Linings Clean up Linings and Adjust Grease or Brake Fluid Find Cause of Leak and on Linings Correct Reline Brakes and Adjust Bind in Pedal Linkage Free up Linkage CONDITIONS Grabbing Action in Brakes Pedal Goes to Floor PROBABLE CAUSE Vacuum Check Valve Not Functioning Properly Collapsed Vacuum Hose Plugged Vacuum Fittings Hydrovac Control Valve Not Functioning Properly Power Piston Binding Grease or Brake Fluid on Linings Rough or Scored Drums Hydrovac Control Valve Piston Friction Power Piston Binding Brake Adjustment Air in Hydraulic System Brake Fluid Leak Brake Drum Cracked American Motors Technical Service Att 56 4 Page 15 CORRECTION Clean or Replace as Necessary Rep
79. ngs are clamped in the brackets with about 1 4 of the housing projecting from the bracket toward the pins Install control and cable assembly by inserting from the rear through the opening on the left hand side of the instrument panel The control lever will project through the slotted opening Install heater and defroster damper control escutcheon 4386072 on instrument panel The screws for the es cutcheon are also used to retain the damper control assembly Use screws GM 187483 Install control knob 4386074 with screw GM 271085 on the control assembly lever Route the control cables and housings through to behind the glove box mounting panel The cowl vent cable is routed through the grommet in the dash panel where the original cable was routed The heater air and de froster damper cable is routed down to the guide bracket on the left hand side of the heater duct The control lever is placed in the Air Condition position Close the ventilator damper by moving the control arm of the damper to the upper movement of its travel The loop of the Boden wire is placed on the control arm of the damper and the cable housing fastened to the bracket allowing enough room for control arm move ment Use the clamp and screw to fasten the cable housing from the original housing The heater air and defroster damper control rod is placed in the upper position of its travel The Boden wire loop is placed on the control arm of the damper and the cable housi
80. on serial number P 6492 This driver is designed to pilot both in the rear pump rotor and on the planetary shaft eliminating brinnelling of the shaft by the rotor lugs and also shearing the driver lugs The brinnelling marks which may be evident on the shaft will not effect the physical properties of the metal or the strength of the shaft Therefore it will not be necessary to replace the rear planetary as sembly where the new driver is installed as it will prevent contact of the rotor drive lugs and shaft Thefollowing Flat Rate Operation for installation of the rear oil pump driver applies NUMBER OPERATION SERIES TIME TRU 34 PARKING BRAKE AND GOVERNOR ASSEMBLY amp Includes remove and replace rear transmission housing M ake all necessary adjustments 90 2 2 Hrs Y ours very truly AUI ut Brodek F H Brodek Technical Service M anager PRINTEDIN U S A a 5 E pue a T X c AMERICAN Motors CORPORATION HUDSON AUTOMOBILES KELVINATOR AUTOMOTIVE TECHNICAL SERVICE NASH AUTOMOBILES AND LED MH ARO HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIAN CES MILWAUKEE 7 WISCONSIN HZ 506 9 HD 56 9 FileUnder GROUP 6 000 TRANSMISSION A pril 25 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT T V LINKAGE ROD MEASUREMENT AND ADJUSTMENT 1956 FLASHAWAY TRANSMIS SION Reports have been received from the field that an improper shift pattern on t
81. outside terminal of the two on one end of the resistor Remove and discard the cover and gasket over the water control valve opening on the dash panel Install water control valve Part Number 3146518 by inserting from inside of car through the opening in the dash panel it is held in place by two screws Part Number 8000099 The capillary tube sensing coil is held in place by screw Part Number GM 1 11684 on one of the webs of the inlet opening in the dash panel Remove the pipe plug in the water pump body and install nipple Part Number 3142368 in place of the plug Remove the pipe plug from the top left side of the cylinder head and install nipple Part Number 3142364 To per form this operation it is necessary to remove the carburetor air cleaner and the cylinder head cover Use two heater hose clamps Part Number 3122345 and install cylinder head to control valve hose Part Number 3147239 to the lower pipe of the control valve Use two heater hose clamps Part Number 3122345 and install heater valve to heater core hose Part Number 3146892 The hose attaches to the remaining pipe of the control valve and to the top pipe of the heater core Use two heater hose clamps Part Number 3122345 and install heater core to water pump hose Part Number 3147238 1 492 Page 4 Part Number GM 161376 installed through two holes in defroster outlets Install damper Part Number 3146673 to rod Part Number 3146671 with screws Part Number
82. r 3411554 Route the cable housing over the steering column to the bracket on the left hand side of the heat distribution duct The knob of the switch and damper control is pushed IN and the damper is placed in the forward position and the Boden wire loop is installed on the damper rod The cable housing is secured in the bracket with cable clamp Part Number 3130267 and screw Part Number GM 163985 Install existing black lead of wire harness under instrument panel into B terminal of switch Install leads of harness Part Number 3147293 into L and terminals of switch Route wires along top of glove box and through existing hole on right hand side of dash panel to the resistor on blower motor housing The wire lead installed into the H terminal is installed ahead of the resistor the lead installed into the terminal is installed behind the resistor Remove the plug from the right hand hole of the control panel on the left hand side of the instrument panel Slide defroster air damper cable washer Part Number GM 1 14607 and jam nut onto the cable of the defroster air damper control after the cable has been inserted from the front through the above men tioned hole Tighten the nut on the cable housing Route the cable below the steering column and along the toe panel above the floor mat to the bracket on the right hand side of the heat distribution duct Push in the control knob place the defroster air damper rod in the upper most pos
83. rew Heater Defroster Cable Clamp Heater and Defroster Cable Screw Heater and Defroster Damper Mounting Plate Heater and Defroster Damper Incl Rod Heater and Defroster Damper Rod Washer Heater and Defroster Damper Rod Grommet Heater and Defroster Damper Rod Bracket Heater and Defroster Damper Rod Bracket Heater and Defroster Damper Rod Bracket Screw Heater and Defroster Damper Mounting Plate Screw Heater and Defroster Damper Cable Guide Plate Heater and Defroster Damper Guide Screw Heater and Defroster Duct Heater and Defroster Duct Fastening Screw Air Filter Heater Core Gasket Heater Core Inlet and Outlet Hose Control Valve to Core Clamp Heater Hose Nipple Wasp Heater Motor Switch Heater Motor Switch Cable Clamp Heater Control Cable Screw Heater Control Cable Clamp Screw Heater Control Cable Clamp Heater Control Valve Gasket Heater Control Valve Screw Heater Control Valve to Dash Defroster Hose Left Defroster Hose Right Nozzle Assembly Defroster Left Nozzle Assembly Defroster Right Bracket Defroster Nozzle Mounting Screw Defroster Mounting Bracket to Nozzle Knob Heater Control Screw Heater Control Switch to Bracket QUANTITY e e pk ODO R BRO RR OBR RD RON OM a RP NN PART NUMBER 3127171 3145960 3143070 GM 120622 GM 131095 3143096 3143924 3143077 8000091 3143196 3143195 3143047 3143738 31437
84. s of the levers and the dowel sleeves at the end support blocks are properly located Torque tighten the rocker arm shaft bolts 55 to 60 Ft Lbs Be sure that the square lockwashers do not turn with the bolts as the baffles might be distorted Check the clearance between the baffles and the valve springs If touching bend the baffle away slightly with a screw driver Install the cylinder head covers using new gaskets NOTE Do not remove the intake valve rubber oil deflectors Suggested Installation Time NUMBER OPERATION TIME 200 INSTALL PART NUMBER 6484396 BAFFLE KIT 1 6 Hr Part Number 6480914 Baffle 8 required per car should be installed below the valve spring on cars built prior to Engine Number P 25889 when a valve grind operation Is being performed Y ours very truly F H Brodek Technical Service M anager Brodek Attach PRINTED IN U S A American Motors Technical Service Att 56 8 Litho in U S A FIGURE 1 Valve Spring Baffles Part Number 6489127 Contained in Kit Part Number 6461396 EF i i rik E SSE ume campi dia z ee Seer pw _ n 44 I EL 1 LI cO dde a aaa w E T T a gt FIGURE 2 Service Baffles Installed HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEOWN AED 3280 SO
85. s one single unit all of which are controlled by hydraulic pressure developed within the master cylinder The hydraulic pressure at the wheel cylinders is the sum of the pressure developed by vacuum power piston movement and the pressure received by the Hydrovac from the master cylinder American Motors Technical Service Att 56 4 Page 2 1 Power Piston 11 Slave Cylinder Bleeder Screw 2 Piston Return Spring 12 Hydraulic Port to Wheel 3 End Plate Cylinders 4 Control Valve Bleeder Screw 13 Check Valve Ball 5 Control Valve Piston 14 Slave Cylinder Piston 6 Diaphragm 15 Hydraulic Port From Master 7 Vacuum Poppet Cylinder 8 Atmospheric Poppet 16 Push Rod 9 Poppet Spring 17 Vacuum Port and Check Valve 10 Air Cleaner Atmospheric 18 Push Rod Seal Pressure Inlet FIGURE 1 Sectional View of Hydrovac Unit OPERATION Released Position In the released position Fig 2 with the engine operating both sides of the power piston are open to engine vac uum Vacuum enters the power cylinder through the vacuum check valve In this position the vacuum poppet is off its seat therefore vacuum may pass through the center of the diaphragm into the valve chamber The atmo spheric poppet is held closed by spring pressure Vacuum is then transmitted through the exterior mounted vac uum tube to the opposite side of the power piston American Motors Technical Service Att 56 4 Page 3 f r CT VACUUM
86. s retaining frame 3 screws Disconnect speedometer cable and wires to gauges remove all light sockets from instrument housing and remove mounting screw from retaining ears at both sides of housing Considerable freedom from wire entanglement can be easily secured at this point by removing the ignition lock with all Wires still attached over the steering column Pull instrument cluster forward at its bottom edge and lower it slightly to disengage the retaining ear at top of cluster Slide unit toward center of car Tilt unit face upward and remove the gauge voltage regulator from back of housing one screw Wiring from regulator to gauges can be left attached Instrument housing can now be rotated to a vertical position with the dial facing the rear of the car and be lowered between the glove box and steering column for removal Without A ir Conditioning There is no need to remove ash tray or ignition lock When the wiring and mounting bolts are removed the instrument as sembly may be removed by lowering it on other side of steering column Y ours very truly F H B rodek Brodek Technical Service M anager ctp PRINTED IN U S A AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE AND LEO NM ARD HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 14 HD 56 14 File Under GROUP 3 000 ELECTRICAL WIRING LAM
87. s the proper tightening of the cylinder head Note this new cylinder head torque value as it applies to the 1 2 cap screws used 1955 56 Series production 85 90 Foot Pounds cold The cylinder head should be tightened with engine at room temperature 70 F H Brodek ctp PRINTED IN USA Yours very truly p b CH Ta T Un CFT am ZN stub F H Brodek Technical Service Manager HUDSON AUTOMOBILES NASH AUTOMOBILES SPECIAL PRODUCTS i Man AMERICAN MOTORS CORPORATION AUTOMOTIVE TECHNICAL SERVICE KELVINATOR 3280 SOUTH CLEMENT AVENUE AND LEONARD MILWAUKEE 7 WISCONSIN APPLIANCES HZ 56 11 HD 56 11 File Under GROUP 1 000 ENGINE July 30 1956 ALL DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT INTAKE VALVE SPRING SEAT 80SERIES In afew cases the valve spring retainer split lock has pulled into or through the intake valve spring up per seat A new Carbo Nitrate hardened spring seat Part Number 6492077 Group 1 084 identified with a daub of red paint is available from the M ilwaukee Parts Plant for service replacement particularly in those cases where the car is operated at extreme high speeds Part Number 6440511 valve spring seat will continue to be supplied for the exhaust valves F H Brodek ctp PRINTED IN USA Y ours very truly 2 LH pak F H Brodek Technical Service M anager AMERICAN Motors Corporation HUDSON AUTOMOBILES
88. t flanges on the inside of the heater hopper box 1 477 Page 4 Install air filter 3138385 on top of the heater core Install heater hopper box cover 31 43128 with gasket 3143129 cemented in place on cover to heater hopper box Use speed nuts 3143660 provided and screws from original cover When installing two top screws use two clips 15898 to hold heater motor wire in place Install heater motor extension wire connector 3127171 to heater motor wire Install grommet 3143830 in the hole in the dash panel to the left of the cowl ventilator damper control hole Install heater motor extension wire 4390858 to the connector on the heater motor wire lead and insert into grommet and push wire to inside of car Install heater motor switch assembly 4390689 from the rear of the instrument panel indexing shaft tube through a slot on instrument panel overlay Use two screws 8000015 to fasten switch to instrument panel Insert knob assembly 4390278 through a slot of overlay and in to shaft tube of switch assembly Twist and mesh with rheostat hub while depressing wire spring retainer at rheostat end of switch Wire spring when released should then locate itself in groove of knob shaft to secure it into switch assembly The existing black wire lead in the harness from the circuit breaker is installed into the battery terminal of the switch Remove dummy plate used on dash panel in place of water control valve Install water control valve
89. tial and providing the operator with a power assist DESCRIPTION OF OPERATION The Hydrovac operation has three basic controls Fig 1 Hydraulically Actuated Control Valve The control valve contains a piston diaphragm vacuum and atmospheric poppets Hydraulic pressure from the master cylinder controls the piston movement which in turn regulates the position of the vac uum and atmospheric poppets Vacuum Power Cylinder The power cylinder consists of a piston piston return spring and push rod which 15 pinned to the hydraulic piston of the slave cylinder Power piston movement is a result of a pressure differential across the piston The amount of pressure differential is governed by control valve piston movement and vacuum and atmospheric poppet positions The Hydrovac 1s hydraulically connected between the master cylinder and wheel cylinders Therefore as additional pedal pressure is exerted the master cylinder output pressure is increased This increase in pressure will cause a greater pressure differential across the power piston and provide a proportioned increase in power assist Hydraulic Slave Cylinder The slave cylinder consists of a piston which is pinned to the push rod The piston has a ball check valve assembly mounted integrally Movement of the piston is controlled by two forces Movement of the vacuum power piston and hydraulic pressure from the master cylinder During operation these three basic controls function a
90. tment Inspect for Dirt Under Atmospheric Poppet or Control Valve Piston Friction Inspect Operating Yoke of Piston to Insure Proper Operation of Check Ball Remove Cylinder Shell and Check Power Piston Stroke ne E a Ty a AMERICAN Motors Corporation HUDSON AUTOMOBILES E E E VIN Tol AUTOMOTIVE TECHNICAL SERVICE EI d HASH AUTOMOBILES AN D E N A R D HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONMSIN HZ 56 2 HD 56 2 File Under GROUP 8 000 BRAKES AND WHEELS HUB AND DRUM February 1 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE DEPARTMENT REAR WHEEL BRAKE CYLINDERS 1956 HORNET AND WASP SERIES Effective at car Serial Numbers Y 2019 X 9204 and W 9403 a 7 8 diameter rear wheel brake cylinder was incorporated in production to improve wheel brake distribution The previous cylinders were 15 16 diameter Yours very truly 2 A C s p J arm rd a ET F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN USA AMERICAN Motors Corporation HUDSON AUTOMOBILES 1 E E V IN A T i AUTOMOTIVE TECHNICAL SERVICE T ULP Di NASH AUTOMOBILES AND LEONARD HUDSON SPECIAL PRODUCTS 3280 SOUTH CLEMENT AVENUE APPLIANCES MILWAUKEE 7 WISCONSIN HZ 56 3 HD 56 3 File Under GROUP 8 000 BRAKES AND WHEELS HUB AND DRUM May 22 1956 ALL HUDSON DEALERS ZONES AND
91. u will be advised in the near future regarding service correction as it applies to the gear or machinery noise Always inspect the speedometer cable housing for kinks or sharp bends in the housing M ake sure that the cable is of the correct length for the series required To insure the use of speedometer cable cores which will give quiet and satisfactory service locate the cable core on a flat surface in the form of an inverted and then cross the open ends Hold one end in the left hand the other in the right hand Twist one end applying light finger pressure to the other end If the core 15 satisfactory the turning action will be smooth On a damaged core although not noticeable by visual inspection the turning action will be jerky and in a severe case the core will leap or jump The speedometer cable requires no lubrication but as a sound deadener it is beneficial to coat the cable with a light coating of high melting point grease Y ours very truly DIG Deut F H Brodek F H Brodek ctp Technical Service M anager PRINTEDINU SA HUDSON AUTOMOBILES NASH AUTOMOBILES HUDSON SPECIAL PRODUCTS AMERICAN Motors Corporation AUTOMOTIVE TECHNICAL SERVICE I T UO AND LEON A RE D 3280 SOUTH CLEMENT AVENUE b MILWAUKEE 7 WISCONSIN HZ 56 5 HD 56 5 File Under GROUP 13 000 WEATHER EYE SPEEDOMETER INSTRUMENT PANEL February 1 1956 ALL HUDSON DEALERS ZONES AND DISTRIBUTORS ATTN SERVICE
92. ve Cylinder Piston and Power Piston From End Plate Compress the power piston return spring as shown in Figure 8 so that the slave cylinder piston protrudes from the end plate With the use of two clamps lock the power piston in this position Pull back spring on slave cylinder piston and remove the retaining pin Remove the clamps and separate the power piston and return spring from end plate 1 Piston 4 End Plate 2 Pin 5 Clamps 3 Push Rod 6 Power Piston FIGURE 8 Removal of Slave Cylinder Piston and Power Piston From End Plate American Motors Technical Service Att 56 4 Page 9 Disassembly of Slave Cylinder Hydraulic Piston Remove rubber cup from piston Disengage snap ring and remove retainer spring and check valve bal I The remainder of the piston is serviced as an assembly therefore no further disassembly is necessary Fig 9 1 Snap Ring 4 Ball 2 Retainer 5 Cup 3 Spring 6 Piston FIGURE 9 Disassembly of Slave Cylinder Hydraulic Piston Disassembly of Power Piston Being careful not to damage the finish of the push rod clamp the hex of the push rod in a vise and remove the retaining nut Remove the wick retainer plate packing ring packing wick rear packing plate piston packing push rod seal front piston plate and washer Fig 10 American Motors Technical Service Att 56 4 Page 10 POWER PISTON RE ASSE MBI Y AICH K eliimer Plabe Packing Bing i racking
93. witch in Off position Some cars may have the back up light feed wire attached to the red wires on the center terminal of the body junction block behind the battery This energizes the circuit at all times when the shift lever is in reverse with the ignition switch On or Off This condition is found mostly on overdrive and standard transmission equipped cars To correct remove the red wire from back up light switch connected to the center terminal of body junction block and cut off the eye terminal and replace it with a Douglas terminal Check to see if back up light switch wire extension red 18 wire with Douglas terminal connection on engine side of dash and eye terminal connection inside of car is attached to Aux terminal of circuit breaker and routed through main wiring harness grommet on dash If this wire is missing install Part Number 3415469 Rambler Series and 4392421 on all other models Install connecting Douglas terminal end of back up light switch wire to it On automatic transmission cars the back up light switch wire may be found connected to the right hand terminal of the body junction block with green colored wires Disconnect and install Douglas terminal in place of eye terminal and proceed as above for the overdrive and standard transmission cars Yours very truly Cf F H Brodek Technical Service Manager F H Brodek ctp PRINTED IN U S a 5 E T X c AMERICAN
94. ydrovac in Applied Position HYD PISTON N RELEASED HALL CHECK STOP S ASHER POSITION ALLOWING VALVE OM SEAT BALL CHECK WALWE FIGURE 5 Slave Cylinder Hydraulic Check Valve in Applied Position American Motors Technical Service Att 56 4 Page 6 HOLDING POSITION During any phase of a brake application when the desired braking effect has been obtained the hydraulically actuated control valve will go into a holding position In this position hydraulic pressure against the control valve piston is balanced by the pressure differential across the diaphragm thereby seating both atmospheric and vacuum poppets Any increase or decrease in hydraulic input pressure will cause a corresponding change in the pressure differential across the diaphragm in addition to causing a change in the Hydrovac hydraulic output pressure BRAKE APPLICATION WITHOUT A POWER ASSIST If the vacuum supply fails the brakes may be applied in a fully conventional manner As stated previously the Hydrovac is hydraulically connected between the master cylinder and wheel cylinders In the released position the ball check valve in the slave cylinder hydraulic piston 1s off its seat if the vacuum supply fails the fluid under pressure from the master cylinder will by pass directly through the ball check valve to the wheel cylinders DISASSEMBLY OF THE HYDROVAC NOTE Always use extreme care in handling hydraulic system parts to prevent their coming in cont

1956 AMC Hudson Body Bulletins

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