Fuller Mid-Range Transmissions

Transcription

1 Fuller Mid-Range Transmissions Service Manual Fuller Mid-Range Transmissions TRSM0110 July 2011 FS-5205A FS-5205B FS-5205C FS-5306A FS-5406A FS-5406N FS-6205A FS-6205B FS-6305A FS-6305B FS-6306A FS-6406A FS-6406N FSB-5406B FSO-4305 FSO-6406A FSO-8406A

2 Warnings and Precautions Before starting a vehicle always be seated in the driver s seat, place the transmission in neutral, set the parking brakes and disengage the clutch. Before working on a vehicle place the transmission in neutral, set the parking brakes and block the wheels. Before towing the vehicle place the transmission in neutral, and lift the rear wheels off the ground, remove the axle shafts, or disconnect the driveline to avoid damage to the transmission during towing. The description and specifications contained in this service publication are current at the time of printing. Eaton Corporation reserves the right to discontinue or modify its models and/or procedures and to change specifications at any time without notice. Any reference to brand name in this publication is made as an example of the types of tools and materials recommended for use and should not be considered an endorsement. Equivalents may be used. This symbol is used throughout this manual to call attention to procedures where carelessness or failure to follow specific instructions may result in personal injury and/or component damage. Departure from the instructions, choice of tools, materials and recommended parts mentioned in this publication may jeopardize the personal safety of the service technician or vehicle operator. Warning: Failure to follow indicated procedures creates a high risk of personal injury to the servicing technician. Caution: Failure to follow indicated procedures may cause component damage or malfunction. Note: Additional service information not covered in the service procedures. Tip: Helpful removal and installation procedures to aid in the service of this unit. Always use genuine Eaton replacement parts.

3 Table of Contents Introduction Purpose and Scope of Manual... 1 How to use this Manual... 1 Disassemble Precautions... 1 Inspection Precautions... 2 Assembly Precautions... 3 Model Information Serial Tag Information and Model Nomenclature... 5 Model Number... 6 Serial Number... 6 Bill of Material or Customer Number... 6 Specifications Torque Ratings... 7 Lubrication Information Lubrication... 9 Maintain Proper Oil Level... 9 Maintenance Interval Chart Required Lubricant Chart Transmission Operating Angles Tool Information Recommended Tools Special Tools Manufacturers Preventive Maintenance Preventive Maintenance Checks Before Transmission Removal Checks With Drive Line Dropped Checks With Universal Joint Companion Flange or Yoke Removed Inspection Rear Seal Maintenance Power Flow Power Flow In-Vehicle Service Procedures Shift Bar Housing How to Remove the Gear Shift Lever How to Install the Gear Shift Lever How to Remove the Shift Bar Housing How to Install the Shift Bar Housing Output Yoke How to Remove the Output Yoke/Companion Flange...27 How to Install the Output Yoke/Companion Flange...28 Clutch Housing How to Remove the Clutch Housing...29 How to Install the Clutch Housing...30 Transmission Overhaul Procedures- Bench Service Shift Bar Housing Functions of a Shift Bar Housing...31 How to Disassemble the Gear Shift Lever...32 How to Assemble the Gear Shift Lever...33 How to Disassemble the FS-4205 Shift Bar Housing...34 How to Assemble the FS-4205 Shift Bar Housing...35 How to Disassemble the FS-5205 Shift Bar Housing...37 How to Assemble the FS-5205 Shift Bar Housing...39 How to Disassemble the FS-6205/6305 Shift Bar Housing...41 How to Assemble the FS-6205/6305 Shift Bar Housing...42 How to Disassemble the FS-5306/6306/5406/6406 Shift Bar Housing...44 How to Assemble the FS-5306/6306/5406/6406 Shift Bar Housing...46 How to Disassemble the FSO-6406/8406 Shift Bar Housing...48 How to Assemble the FSO-6406/8406 Shift Bar Housing...50 How to Disassemble the Reverse Plunger on FS-4X05/5X How to Assemble the Reverse Plunger on FS-4X05/5X How to Disassemble the Reverse Plunger For All Models Except FS-4205/ How to Assemble the Reverse Plunger For All Models Except FS-4205/

4 Table of Contents Disassemble Main Section How to Remove the Input Shaft Assembly How to Remove the Mainshaft Assembly How to Remove the Countershaft Assembly How to Remove the Reverse Idler Gear Assembly For All Models Except FS-5306/ How to Remove the FS-5306/6306 Reverse Idler Gear Assembly Mainshaft Assembly How to Disassemble the FS-4205 Mainshaft Assembly How to Assemble the FS-4205 Mainshaft Assembly How to Disassemble the FS-5205 Mainshaft Assembly How to Assemble the FS-5205 Mainshaft Assembly How to Disassemble the FS-6205 Mainshaft Assembly How to Assemble the FS-6205 Mainshaft Assembly How to Disassemble the FS-6305 Mainshaft Assembly How to Assemble the FS-6305 Mainshaft Assembly How to Disassemble the FS-5306/6306 Mainshaft Assembly How to Assemble the FS-5306/6306 Mainshaft Assembly How to Disassemble the FS-5406/6406 and FSO-6406 Mainshaft Assembly How to Assemble the FS-5406/6406 and FSO-6406 Mainshaft Assembly How to Disassemble the FSO-8406 Mainshaft Assembly How to Assemble the FSO-8406 Mainshaft Assembly How to Disassemble the FS-5306/6306/5406/6406 and FSO-6406/8406 Countershaft Assembly How to Assemble the FS-5306/6306/5406/6406 and FSO-6406/8406 Countershaft Assembly Disassemble Main Section How to Install the Reverse Idler Gear Assembly For All Models Except FS-5306/ How to Install the FS-5306/6306 Reverse Idler Gear Assembly How to Install the Countershaft Assembly How to Install the Mainshaft Assembly How to Install the Input Shaft Assembly Setting End Play Procedure For All Models Except FS Setting End Play Procedure For FS Countershaft Assembly How to Disassemble the FS-4X05 Countershaft Assembly How to Assemble the FS-4X05 Countershaft Assembly How to Disassemble the FS-5X05 Countershaft Assembly How to Assemble the FS-5X05 Countershaft Assembly How to Disassemble the FS-6X05 Countershaft Assembly How to Assemble the FS-6X05 Countershaft Assembly

5 Introduction Purpose and Scope of Manual This manual is designed to provide detailed information necessary to service and repair the Eaton Fuller transmissions listed on the front. How to use this Manual The service procedures have been divided into two sections: In-Vehicle Service Procedures and Transmission Overhaul Procedures Bench Service. In-Vehicle Service Procedures contain procedures that can be performed while the transmission is still installed in the vehicle. Transmission Overhaul Procedures contain procedures that are performed after the transmission has been removed from the vehicle. The procedure sections are laid out with a general heading at the top outside edge of each page followed by more specific headings and the procedures. To find the information you need in these sections, first go to the section that contains the procedure you need. Then look at the heading at the top and outside edge of each page until you find the one that contains the procedure you need. Transmission Overhaul Procedures follow the general steps for complete disassembly and then assembly of the transmission. Note: In some instances the transmission appearance may be different from the illustrations, but the procedure is the same. Disassemble Precautions It is assumed in the detailed assembly instructions that the lubricant has been drained from the transmission, the necessary linkage and vehicle air lines disconnected and the transmission has been removed from vehicle chassis. Removal of the gear shift lever housing assembly (or remote control assembly) is included in the detailed instructions (How to Remove the Gear Shift Lever). This assembly MUST be detached from the shift bar housing before the transmission can be removed. Follow closely each procedure in the detailed instructions, make use of the text, illustrations, and photographs provided. Assemblies When disassembling the various assemblies, such as the mainshaft, countershafts, and shift bar housing, lay all parts on a clean bench in the same sequence as removed. This procedure will simplify assembly and reduce the possibility of losing parts. Bearings Carefully wash and lubricate all usable bearings as removed and protectively wrap until ready for use. Remove bearings planned to be reused with pullers designed for this purpose. Cleanliness Provide a clean place to work. It is important that no dirt or foreign material enters the unit during repairs. Dirt is an abrasive and can damage bearings. It is always a good practice to clean the outside of the unit before starting the planned disassembly. Input Shaft The input shaft can be removed from the transmission without removing the countershafts, or mainshaft. Special procedures are required and provided in this manual. Snap Rings Remove snap rings with pliers designed for this purpose. Snap rings removed in this manner can be reused, if they are not sprung or loose. When Using Tools to Move Parts Always apply force to shafts, housings, etc., with restraint. Movement of some parts is restricted. Never apply force to driven parts after they stop solidly. The use of soft hammers, soft bars, and mauls for all disassembly work is recommended. Introduction 1

6 Introduction Inspection Precautions Before assembling the transmission, check each part carefully for abnormal or excessive wear and damage to determine reuse or replacement. When replacement is necessary, use only genuine Eaton Fuller Transmission parts to assure continued performance and extended life from your unit. Since the cost of a new part is generally a small fraction of the total cost of downtime and labor, avoid reusing a questionable part which could lead to additional repairs and expense soon after assembly. To aid in determining the reuse or replacement of any transmission part, consideration should also be given to the unit's history, mileage, application, etc. Recommended inspection procedures are provided in the following checklist. Bearings Wash all bearings in clean solvent. Check balls, rollers, and raceways for pitting, discoloration, and spalled areas. Replace bearings that are pitted, discolored, spalled, or damaged during disassembly. Lubricate bearings that are not pitted, discolored, or spalled and check for axial and radial clearances. Replace bearings with excessive clearances. Check bearing fit. Bearing inner races should be tight to shaft; outer races slightly tight to slightly loose in case bore. If the bearing spins freely in the bore the case should be replaced. Bearing Covers Check covers for wear from thrust of adjacent bearing. Replace covers damaged from thrust of bearing outer race. Check cover bores for wear. Replace those worn or oversized. Clutch Release Parts Check clutch release parts. Replace yokes worn at cam surfaces and bearing carrier worn at contact pads. Check pedal shafts. Replace those worn at bushing surfaces. Gears Check gear teeth for frosting and pitting. Frosting of gear teeth faces presents no threat of transmission failure. Often in continued operation of the unit, frosted gears "heal" and do not progress to the pitting stage. In most cases, gears with light to moderate pitted teeth have considerable gear life remaining and can be reused, but gears in the advanced stage of pitting should be replaced. Check for gears with clutching teeth abnormally worn, tapered, or reduced in length from clashing during shifting. Replace gears found in any of these conditions. Check axial clearance of gears. Gear Shift Lever Housing Assembly Check spring tension on shift lever. Replace tension spring if lever moves too freely. If housing is disassembled, check gear shift lever bottom end and shift finger assembly for wear. Replace both gears if excessively worn. Gray Iron Parts Check all gray iron parts for cracks and breaks. Replace parts found to be damaged. Oil Return Threads and Seals Check oil return threads on the input shaft. If return action of threads has been destroyed, replace the input shaft. Check oil seal in rear bearing cover. If sealing action of lip has been destroyed, replace seal. O-Rings Check all O-rings for cracks or distortion. Replace if worn. Reverse Idler Gear Assemblies Check for excessive wear from action of roller bearings. 2

7 Introduction Shift Bar Housing Assembly Check for wear on shift yokes and blocks at pads and lever slot. Replace excessively worn parts. Check yokes for correct alignment. Replace sprung yokes. Check lockscrews in yoke and blocks. Tighten and rewire those found loose. If housing has been disassembled, check neutral notches of shift bars for wear from interlock balls. Sliding Clutches Check all shift yokes and yoke slots in sliding clutches for extreme wear or discoloration from heat. Check engaging teeth of sliding clutches for partial engagement pattern. Splines Check splines on all shafts for abnormal wear. If sliding clutch gears, companion flange, or clutch hub has wear marks in the spline sides, replace the specific shaft effected. Synchronizer Assembly Check synchronizer for burrs, uneven and excessive wear at contact surface, and metal particles. Check blocker pins for excessive wear or looseness. Check synchronizer contact surfaces on the synchronizer cups for wear. Washers Check surfaces of all washers. Washers scored or reduced in thickness should be replaced. Assembly Precautions Make sure that case interiors and housings are clean. It is important that dirt and other foreign materials are kept out of the transmission during assembly. Dirt is an abrasive and can damage polished surfaces of bearings and washers. Use certain precautions, as listed below, during assembly. Bearings Use a flange-end bearing driver for bearing installation. These special drivers apply equal force to both bearing races, preventing damage to balls/rollers and races while maintaining correct bearing alignment with bore and shaft. Avoid using a tubular or sleeve-type driver, whenever possible, as force is applied to only one of the bearing races. Capscrews To prevent oil leakage and loosening, use Eaton/ Fuller sealant #71225 on all capscrews. Gaskets Use new gaskets throughout the transmission as it is being rebuilt. Make sure all gaskets are installed. An omission of any gasket can result in oil leakage or misalignment of bearing covers. Initial Lubrication Coat all limit washers and shaft splines with Lubricant during assembly to prevent scoring and galling of such parts. O-Rings Lubricate all O-rings with silicon lubricant. Shims Apply a light coat of Eaton/Fuller sealant #71233 to both sides of shims Universal Joint Companion Flange or Yoke Pull the companion flange or yoke tightly into place with the output shaft nut. Make sure the speedometer drive gear or a replacement spacer of the same width has been installed. Failure to pull the companion flange or yoke tightly into place can result in damage to the mainshaft rear bearing. Introduction IMPORTANT: See the appropriate Illustrated Parts Lists (specified by model series) to ensure that proper parts are used during assembly of the transmission. 3

8 4 Introduction

9 Model Information Serial Tag Information and Model Nomenclature Transmission model designation and other transmission identification information are stamped on the transmission tag. To identify the transmission model designation and serial number, locate the tag on the transmission and then locate the numbers as shown. When calling for service assistance or parts, have the model and serial numbers handy. Do not remove or destroy the transmission identification tag. Transmission Tag and Location Model Information 5

10 Model Information Model Number The model number gives basic information about the transmission and is explained below. Use this number when calling for service assistance or replacement parts. Serial Number The serial number is the sequential identification number of the transmission. Before calling for service assistance, write the number down. It may be needed. Bill of Material or Customer Number This number is also referred to as the "TA#" and is located below the model and serial numbers. It is a reference number used by Eaton and is helpful if calling for technical support. 6

11 Specifications Torque Ratings Correct torque application is extremely important to assure long transmission life and dependable performance. Overtightening or under-tightening can result in a loose installation and, in many instances, eventually cause damage to transmission gears, shafts or bearings. Use of a thread sealer/locking compound is recommended for all capscrews. Do not torque capscrews dry. TORQUE CHART Description Torque Value lbs. ft. Thread Size Additional Comments 6 Front Bearing Cover Capscrews lbs. ft. 5/16-18 Apply Loctite 262 to threads. 4 Shift Lever Housing Capscrews lbs. ft. 3/8-16 Apply Loctite 262 to threads. 4 Shift Lever Housing Capscrews for FSO lbs. ft. 3/8-16 Apply Loctite 262 to threads. 9 Shift Rail Retainer Capscrews lbs. ft. 3/8-16 Apply Loctite 262 to threads. 17 Shift Bar Housing Capscrews lbs. ft. 3/8-16 Apply Loctite 262 to threads. 1 Output Shaft Nut, Part Number lbs. ft. 1 1/4-18 With nylon locking insert. Oiled at vehicle installation. 1 Output Shaft Nut, Part Number lbs. ft. +/ /4-18 With nylon locking insert. Oiled at vehicle installation. 4 Clutch Housing Nuts lbs. ft. 5/8-16 Apply Loctite 262 to threads. 4 Clutch Housing Nuts for FS lbs. ft. 5/8-16 Apply Loctite 262 to threads. 2 Hand Hole Cover Capscrews 5-8 lbs. ft. 1/4-12 Apply Loctite 262 to threads. 4 Mainshaft Rear Bearing Cover Capscrews lbs. ft. 1/2-32 Apply Loctite 262 to threads. 1 Oil Fill Plug lbs. ft. 3/4" Pipe 1 Oil Drain Plug lbs. ft. 3/4" Pipe 4 Countershaft Rear Bearing Cover Capscrews lbs. ft. 3/8"-16 Use plain flat washers. Apply Loctite 262 to threads. 12 PTO Cover Capscrews lbs. ft. 3/8" - 16 Apply Loctite 262 to threads. Specifications 7

12 8 Specifications

13 Lubrication Information Lubrication Proper lubrication procedures are the key to a good all-around maintenance program. Eaton Fuller Transmissions are designed so that the internal parts operate in an oil circulating bath created by the motion of the gears and shafts. All parts will be properly lubricated if these procedures are closely followed: 1. Maintain oil level. Inspect regularly. 2. Follow maintenance interval chart. 3. Use the correct grade and type of oil. 4. Buy from a reputable dealer. Maintain Proper Oil Level Make sure oil is level with the filler opening. Being able to reach oil with your finger does not mean oil is at proper level. (One inch of oil level is about one gallon of oil.) When adding oil, never mix engine oils and gear oils in the Lubrication Information Oil Level Hole Proper Oil Level Hole Improper Oil Level 9

14 Lubrication Information Maintenance Interval Chart Eaton Roadranger CD50 Transmission Fluid HIGHWAY USE-Heavy Duty and Mid-Range Initial Fill with Eaton Roadranger CD50 Transmission Fluid Every 10,000 miles Check fluid level. Check for leaks. Every 250,000 miles Change transmission fluid. OFF-HIGHWAY USE Every 40 hours Inspect lubricant level. Check for leaks. Every 1,000 hours Change transmission fluid where severe dirt conditions exist. Every 2,000 hours Change transmission fluid. (Normal off-highway use.) HIGHWAY USE-Heavy Duty and Mid-Range Initial Fill with Other Recommended Oil First 3,000 to 5,000 miles Factory fill initial drain. Refill with Eaton Roadranger CD50 Transmission Fluid; thereafter follow maintenance intervals above. Heavy Duty Engine Lubricant HIGHWAY USE First 3,000 to 5,000 miles Factory fill initial drain. Every 10,000 miles Inspect lubricant level. Check for leaks. Every 50,000 miles Change transmission lubricant. OFF-HIGHWAY USE Every 30 hours Change transmission lubricant on new units. Every 40 hours Inspect lubricant level. Check for leaks. Every 500 hours Change transmission lubricant where severe dirt conditions exist. Every 1,000 hours Change transmission lubricant (Normal off-highway use.) If your vehicle has a transmission oil filter, you must change the filter when fluid or lubricant is changed. 10

15 Lubrication Information Required Lubricant Chart Type Grade (SAE) Fahrenheit Ambient Temperature Eaton Approved Synthetic 50 All Transmission Oil Heavy Duty Engine Oil MIL-L-2104D, API-CD, or Cat TO-4 50 Above 10 F (-12 C) 40 Above 10 F (-12 C) 30 Below 10 F (-12 C) Additives and friction modifiers must not be introduced. Never mix engine oils & gear oils in the same transmission. Lubrication Information The use of lubricants not meeting these requirements will affect warranty coverage. For a list of Eaton Approved Synthetic Lubricants, call HELP (4357). Buy from a reputable dealer For a complete list of approved and reputable dealers, write to: Eaton Corporation Worldwide Marketing Services P.O. Box 4013 Kalamazoo, MI Transmission Operating Angles If the transmission operating angle is more than 12 degrees, improper lubrication will occur. The operating angle is the transmission mounting angle in the chassis plus the percent of upgrade (expressed in degrees). LUBE LEVELS Model Fill Limit FS pints FS pints FS-42/ pints FS-62/ pints FS-53/ pints FS pints FS/FSO pints FSO pints 11

16 12 Lubrication Information

17 Tool Information Recommended Tools Some repair procedures pictured in this manual show the use of specialized tools. Their actual use is recommended as they make transmission repair easier, faster, and prevent costly damage to critical parts. But for the most part, ordinary mechanic's tools such as socket wrenches, screwdrivers, etc., and other standard shop items such as a press, mauls and soft bars are all that is needed to successfully disassemble and reassemble any Eaton Fuller Transmission. The specialized tools can be obtained from a tool supplier or made from tool prints as required by the individual user. Detailed Eaton Fuller Transmission Tool Prints are available upon request by writing to: Eaton Corporation Truck Components Operations Technical Service P.O. Box 4013 Kalamazoo, Michigan SPECIAL TOOLS REFERENCE TOOL NUMBER HOW OBTAINED T1 Tension Spring Driver Made from Fuller Transmission Print T T2 Snap Ring Pliers Tool Supplier T3 Impact Puller (1/2-13 Threaded End) Tool Supplier T4 Countershaft Support Tools and Bearing Driver Made from Fuller Transmission Print T C T5 Bearing Guide Made from Fuller Transmission Print T T6 Oil Seal Driver, Rear Bearing Cover Made from Fuller Transmission Print T T7 Input Shaft Nut Installer Made from Fuller Transmission Print T A T8 Torque Wrench, 1000 lbs. ft. Capacity Tool Supplier T9 Oil Seal Driver, Front Bearing Cover (push type clutch) Made from Fuller Transmission Print T T10 Oil Seal Driver, Front Bearing Cover (pull type clutch) Made from Fuller Transmission Print T Tool Information Special Tools Manufacturers Below are the addresses and phone numbers of the companies that make tools specifically for Eaton Fuller transmissions. G and W Tool Company 1105 E. Louisville Broken Arrow, OK Great Lakes Tool 8530 M-89 Richland, MI O.T.C. 655 Eisenhower Dr. Owatonna, MN The specialized tools can be obtained from a tool supplier or made from tool prints as required by the individual user. Detailed Eaton Fuller Transmission Tool Prints are available upon request by writing to: Eaton Corporation Truck Components Operations Technical Service P.O. Box 4013 Kalamazoo, Michigan

18 14 Tool Information

19 Preventive Maintenance Preventive Maintenance Everyday there are countless vehicles operating over the highways with transmissions in such a neglected mechanical condition, they can be referred to as failures looking for a place to break down. They lack a proper and organized preventive maintenance program. Preventive maintenance is a general term which applies to all procedures necessary to have maximum life and satisfactory service at the lowest possible cost, short of removing and repairing the unit. A number of conditions contrary to good preventive maintenance can generally be pointed to when inspecting a failed transmission. Taking a few minutes every so many hours or miles to do a few simple checks could help avoid eventual breakdown or reduce the repair cost. If the transmission is not cared for, it will breakdown. Transmission appearance may differ, however the procedure is the same. Checks Before Transmission Removal Preventive Maintenance Note: Transmission appearance may differ, the procedure is the same. Clutch Housing Mounting (1) Check all capscrews of clutch housing flange for looseness. Clutch Release Bearing (Not Shown) Remove hand hole cover and check radial and axial clearance in release bearing. Check relative position of thrust surface of release bearing with thrust sleeve on push-type clutches. Clutch Pedal Shaft and Bores (3) Pry upward on shafts to check wear. If excessive movement is found, remove clutch release mechanism and check bushings on bores and wear on shafts. See OEM literature. Lubricant (4) Change at specified service intervals. Use only the types and grades as recommended. See "Recommended Lubrication Chart". 15

20 Preventive Maintenance Filler and Drain Plugs (5) Remove filler plugs and check level of lubricant at specified intervals. Tighten fill and drain plugs securely. Capscrews and Gaskets (6) Check all capscrews, especially those on PTO covers and rear bearing covers for looseness which would cause oil leakage. Check PTO opening and rear bearing covers for oil leakage due to faulty gasket. Gear Shift Lever (7) Check for looseness and free play in housing. If lever is loose in housing, check Gear Shift Lever Housing Assembly. Gear Shift Lever Housing Assembly (8) Remove the gear shift lever housing assembly from the transmission. Check the tension spring and washer for set and wear. Check gear shift lever bottom end for wear in the slots and check for wear of finger assembly and housing. Checks With Drive Line Dropped Universal Joint Companion Flange or Yoke Nut (9) Check for tightness. Tighten to recommended torque. Output Shaft (Yoke Nut Tightened) Pry upward against output shaft to check radial clearance in mainshaft rear bearing. Checks With Universal Joint Companion Flange or Yoke Removed Note: If necessary, use solvent and shop rag to clean sealing surface of companion flange or yoke. Do not use crocus cloth, emery paper, or other abrasive materials that will mar surface finish. Splines on Output Shaft (11) Check for wear from movement and chucking action of the universal joint companion flange or yoke. Mainshaft Rear Bearing Cover (12) Check oil seal for wear. 16

21 Preventive Maintenance Inspection Part to Inspect What to Check For Action to be Done Speedometer Connections Speedometer cables should not be loose. Applied hydraulic thread sealant #71208 to threads. Torque speedometer sleeve to lbs. ft. Should be an O-ring or gasket between the mating speedometer sleeve and the rear bearing cover. Replace the O-ring/gasket if damaged or missing. Rear Bearing Cover Nuts Check retaining nuts for tightness. Apply Eaton Sealant #71225 to the capscrew threads. Torque capscrews to lbs. ft. Output Yoke Retaining Nut Rear Seal Maintenance Check the output yoke retaining nut for tightness. Leakage in transmission rear seals is perhaps the most common problem in truck transmissions. The problem is more than a nuisance because if not repaired, a leaking seal can lead to catastrophic transmission failure. There have been strides in reducing leakage through improved designs and the use of new seal materials. However, the most important way to reduce this problem continues to be through proper service and installation procedures. It can be very time consuming and expensive to replace a rear seal system, then find the oil seal system was not causing the oil leakage. Using the following checklist, inspect the transmission to insure proper identification of the leak path. Torque the output yoke retaining nut to lbs. ft. (For FS-6106 series: lbs. ft.) Do not over torque the output nut. PTO Covers and Openings Check the capscrews for tightness. Apply Eaton Sealant #71225 to the capscrew threads, if not precoated. Tighten PTO capscrews to lbs. ft. Front Bearing Cover Oil Drain Plug, Oil Fill Plug Check front bearing cover, front case, shift bar housing, rear bearing cover, and clutch housing for cracks or breaks. Check the capscrews for tightness. Check the oil drain plug and the oil fill plug for leakage. Replace parts found to be damaged. Tighten the capscrews to lbs. ft. Torque the oil drain plug to lbs. ft. Torque the oil fill plug to lbs. ft. Before disassembling the rear seal system, clean the rear bearing cover, the rear seal, and the output yoke. DO NOT USE A HIGH PRESSURE SPRAY WASHER TO CLEAN THE REAR SEAL SYSTEM. USE A CLEAN DRY CLOTH. Run the vehicle, then inspect these areas for oil leaks. For more detailed information on rear seal maintenance, order TCSM-0912, "Seal Maintenance Guide." To receive a Product Literature Order Form, write to: Eaton Corporation Global Marketing Services P.O. Box 4013 Kalamazoo, MI Preventive Maintenance 17

22 18 Preventive Maintenance

23 Power Flow Power Flow The transmission must efficiently transfer the engine's power, in terms of torque, to the vehicle's rear wheels. Knowledge of what takes place in the transmission during torque transfer is essential when trouble-shooting and when making repairs become necessary. 1. Power (torque) from the engine is transferred to the transmission input shaft. 2. Torque is transferred to countershaft drive gear. 3. Torque is delivered along countershaft to all countershaft gears. 4. Torque is transferred to "engaged" mainshaft gear. The cross section view illustrates 1st speed gear position. 5. The engaged mainshaft gear external clutching teeth transfer torque to the mainshaft through the synchronizer assembly or sliding clutch. 6. The mainshaft transfers torque directly to driveshaft through the output yoke. Power Flow FS-5205 First Gear 19

24 Power Flow FS-5205 Second Gear FS-5205 Third Gear 20

25 Power Flow FS-5205 Fourth Gear Power Flow FS-5205 Fifth Gear or Direct 21

26 22 Power Flow

27 In-Vehicle Service Procedures How to Remove the Gear Shift Lever Special Instructions Remote control housings are removed the same way as gear shift levers. Procedure - 1. From the gear shift lever base, remove the four (4) retaining capscrews. Shift Bar Housing 2. To break the gasket seal, lightly jar the gear shift housing. 3. Remove the gear shift lever housing. 4. Remove the gasket and clean all mounting surfaces of gasket material. 23

28 In-Vehicle Service Procedures How to Install the Gear Shift Lever Special Instructions Remote control housings are installed the same way as gear shift levers. Make sure the shift block and yoke notches are aligned in the neutral position. Procedure - 1. Position a new gear shift lever gasket on the gear shift lever mounting surface. 2. Fit the gear shift lever into the shift block. Final Check Make sure the capscrews are properly torqued. Make sure you can shift the transmission. 3. Apply Eaton/Fuller Sealant #71225 or equivalent to the retaining capscrews, if not precoated. 4. Install the retaining capscrews, tighten to lbs. ft. of torque. 24

29 In-Vehicle Service Procedures How to Remove the Shift Bar Housing Special Instructions There are two (2) lengths of capscrews. The 1 1/2" capscrews are used with the lifting eyes. Note their location. Shift transmission into neutral position. Procedure - 1. From the shift bar housing rim, remove the retaining capscrews. Shift Bar Housing 2. To break the gasket seal, jar the shift bar housing. 3. Remove the shift bar housing. 4. Remove the gasket and clean all mounting surfaces of gasket material. 25

30 In-Vehicle Service Procedures How to Install the Shift Bar Housing Special Instructions There are two (2) lengths of capscrews. The 1 1/2" capscrews are used with the lifting eyes. Apply Eaton/Fuller gasket sealant #71233 or equivalent to shift bar housing gasket before assembly. Procedure - 1. Place the shift bars in the neutral position. 6. Install the center rear retaining capscrew first and the center front retaining capscrew second, tighten to lbs. ft. of torque. 2. Place the synchronizers in the neutral position. 3. Position a new shift bar housing gasket on the shift bar housing mounting surface. 7. Install the remaining capscrews, tighten to lbs. ft. of torque. 4. As you install the shift bar housing, make sure the yokes fit onto the corresponding synchronizers. Final Check Make sure the capscrews are properly torqued. 5. Apply Eaton/Fuller sealant #71225 or equivalent to the retaining capscrews, if not precoated. 26

31 In-Vehicle Service Procedures How to Remove the Output Yoke/Companion Flange Special Instructions You must remove the shift bar housing in order to lock the transmission. Special Tools A large breaker bar or air impact wrench Procedure - 1. Engage two (2) mainshaft synchronizers into two (2) mainshaft gears to lock the transmission. 2. Use a breaker bar to remove the nut from the output shaft. Output Yoke 3. Pull the output yoke or flange straight to the rear and off the output shaft. 27

32 In-Vehicle Service Procedures How to Install the Output Yoke/Companion Flange Special Instructions You must remove the shift bar housing in order to lock the transmission. Special Tools Torque wrench with 500 lbs. ft. capacity Procedure - 1. Engage two (2) mainshaft synchronizers into two (2) mainshaft gears to lock the transmission. Final Check Make sure the output shaft nut is properly torqued. Unlock the transmission. 2. Install the speedometer drive gear rotor or replacement spacer on the output shaft inside the rear bearing cover. 3. Slide the companion flange or yoke onto the output shaft. 4. Install the output shaft nut, tighten to lbs. ft. of torque. 28

33 In-Vehicle Service Procedures How to Remove the Clutch Housing Special Instructions Removal of the clutch housing is done in the horizontal position. Procedure - Clutch Housing 1. Remove the four clutch housing retaining bolts from the case and clutch housing. 2. Jar clutch housing with a rubber mallet and pull the clutch housing from transmission case. 29

34 In-Vehicle Service Procedures How to Install the Clutch Housing Procedure - 1. Position clutch housing on front of transmission. 2. Install four retaining bolts and torque to the recommended torque. 30

35 Functions of a Shift Bar Housing Shift bar housings are a very important part of the transmission. No matter what kind of shift bar housing your transmission has, they all provide the same functions: Engage the transmission gearing, Prevents the driver from shifting into 2 gears at the same time, Prevents shifting into reverse without force, Actuates the back up lights, Actuates the neutral switches. Shift Bar Housing 31

36 How to Disassemble the Gear Shift Lever Special Instructions For safety reasons when disassembling the gear shift lever, release the spring one coil at a time. WARNING: Wear safety glasses when removing spring. Special Tools Vise with brass jaws or wood blocks Procedure - 1. Remove the shift lever boot. 5. From inside the housing tower, remove the tension spring, washer, and gear shift lever. 2. Slide the boot up the shift lever shaft and remove. 3. With housing bottom facing up, secure the assembly in a vise. 6. From the housing tower remove spade pin bores, and inspect the spade pins, discard if damaged. 4. Use large screwdriver to twist between the spring and housing, forcing the spring from under the housing lugs. 7. If housing tower spade pin bores are worn, discard the housing tower and replace with a new housing tower. 32

37 How to Assemble the Gear Shift Lever Special Instructions Inspect tension spring, washer, and pivot pin bores for wear. (Replace, if oblong.) Apply oil to the shift lever pivot ball and housing socket prior to assembly. Seat the tension spring one coil at a time. Special Tools See Recommended Tools on page 13. Vise with brass jaws or wood blocks Item T1: Tension spring driver Procedure - 1. With housing bottom facing up, secure the assembly in a vise. 6. Use a tension spring driver to install the tension spring under the housing lugs. Shift Bar Housing 2. If housing tower pivot pin bores are worn, discard the housing tower and replace with a new housing tower. 3. If the pivot pins are damaged, replace and install the pivot pins in housing tower bore. 7. Remove the assembly from the vise. 8. Install a rubber boot over the gear shift lever and against the housing. 4. Align the lever ball slot with the pivot pin and position the gear shift lever in the housing tower. 5. With dished-side up, install the washer over the ball. 9. Install the shift lever grip. Final Check Make sure the gear shift lever can move. 33

38 How to Disassemble the FS-4205 Shift Bar Housing Special Instructions The shift bar housing must be removed from the transmission. During disassembly, lay all parts on a clean bench in order of removal to facilitate assembly. Shift bars not being removed must be kept in the neutral position or the interlocking parts lock the bars. Start with 1st-reverse yoke assembly. When removing the interlock balls, detent balls, and springs, remove the interlock and detent balls before removing the springs. Procedure - 1. Lay shift bar housing on work bench. Shift 4th-5th yoke assembly into 4th speed position. Remove capscrews and retainers. 4. Remove 4th-5th yoke assembly. If the yoke pad bushings are to be replaced, remove worn pad from shift yoke, install new pad and bend tabs over top and bottom of yoke. Note: If yoke replacement is required, yoke can be removed by driving the roll pin through the yoke and rail with a punch and hammer. Note: Install new yoke by aligning shift yoke with shift bar alignment hole and insert lock pin. 2. Remove 1st-reverse yoke assembly. 5. Remove interlock balls, detent balls, and springs. 3. Remove 2nd-3rd yoke assembly and interlock pin. 34

39 How to Assemble the FS-4205 Shift Bar Housing Special Instructions Interlock balls, detent balls, and springs can be used interchangeably. Lubricate yoke pads and inserts with oil before assembly. Lubricate yoke bar grooves with grease before assembly. Keep yoke bars in neutral while assembling. The shift yoke retainer holes are not tapped on new shift bar housings. The capscrews that are used are "thread forming" and can be reused if the shift bar housing is replaced. It may be necessary to support the yoke bars in position while installing the retainers. Procedure - 1. Install interlock balls, detent balls and springs in the following sequence; A. Position (3) balls in the reverse light switch bore. B. Install 1st-reverse detent spring and ball. C. Position (2) balls in adjacent cross bore. D. Install 2nd-3rd detent spring and ball. E. Position (2) balls in adjacent cross bore F. Install 4th-5th detent spring and ball. 3. Install interlock pin in 2nd-3rd yoke assembly and position as shown. Shift Bar Housing Note: Balls and springs can be used interchangeably. 4. Position 4th-5th yoke assembly in housing as shown. 2. Position 1st-reverse yoke in housing assembly as shown. 35

40 5. Position shift yokes as shown. Install front and rear retainer over shift rails and install front two capscrews. Tighten all rail support capscrews to lbs. ft. (27-34 N m). Note: It may be necessary to support rails in proper position while installing rail supports. 36

41 How to Disassemble the FS-5205 Shift Bar Housing Special Instructions The shift bar housing must be removed from the transmission. During disassembly, lay all parts on a clean bench in order of removal to facilitate assembly. Shift bars not being removed must be kept in the neutral position or the interlocking parts lock the bars. Start with 4th-5th yoke assembly. When removing the interlock balls, detent balls, and springs, remove the interlock and detent balls before removing the springs. Special Tools Magnet Procedure - 4. Remove 4th-5th yoke assembly. Shift Bar Housing 1. With the housing rear to the right, lay the assembly on a flat surface. 2. In order to remove the front retaining capscrews, shift 4th-5th yoke assembly into 4th gear position (rearward). 5. Remove 2nd-3rd yoke assembly and interlock pin. 3. Remove capscrews and retainers. 6. Remove 1st-reverse bar assembly. 37

42 7. If necessary, remove 1st-reverse bar front spacer. 12. Inspect the yoke pad bushings. If the pads are worn, remove worn pad from shift yoke, install new pad and bend tabs over yoke top and bottom. 8. From the 1st-reverse yoke assembly, remove the 1streverse lock pin. 9. Remove the 1st-reverse assembly. 13. Inspect the yokes. If the yokes are damaged, remove by driving the roll pin through the yoke and rail. 10. Remove the 1st-reverse actuator. 11. Remove the four (4) interlock balls, the three (3) detent balls, the three (3) back up light switch balls, and the three (3) springs. 38

43 How to Assemble the FS-5205 Shift Bar Housing Special Instructions Interlock balls, detent balls, and springs can be used interchangeably. Lubricate yoke pads and inserts with oil before assembly. Lubricate yoke bar grooves with grease before assembly. Keep yoke bars in neutral while assembling. The shift yoke retainer holes are not tapped on new shift bar housings. The capscrews that are used are "thread forming" and can be reused if the shift bar housing is replaced. It may be necessary to support the yoke bars in position while installing the retainers. Procedure - 4. Install the 1st-reverse lock pin in the yoke assembly. Shift Bar Housing 1. Install interlock balls, detent balls and springs in the following sequence; A. Position (3) balls in the reverse light switch bore. B. Install 1st-reverse detent spring and ball. C. Position (2) balls in adjacent cross bore. D. Install 2nd-3rd detent spring and ball. E. Position (2) balls in adjacent cross bore F. Install 4th-5th detent spring and ball. 5. Position 1st-reverse bar assembly in the housing. Note: Balls and springs can be used interchangeably. 6. Install interlock pin in 2nd-3rd yoke assembly and position as shown. 2. Over the actuator pivot pin, seat the 1st reverse actuator. 3. Position 1st-reverse yoke in housing assembly as shown. 7. Position 4th-5th yoke assembly in housing as shown. 39

44 8. Position retainers, front retainer in rear set of holes. 9. Install the capscrews in rear retainer. Tighten all rail support capscrews to lbs. ft. (27-34 N m). 11. Install the capscrews in front retainer. Tighten all rail support capscrews to lbs. ft. (27-34 N m). Note: It may be necessary to support rails in proper position while installing rail supports. 10. Carefully shift the 4th-5th yoke into 4th gear position (rearward). 40

45 How to Disassemble the FS-6205/6305 Shift Bar Housing Special Instructions The shift bar housing must be removed from the transmission. During disassembly, lay all parts on a clean bench in order of removal to facilitate assembly. Shift bars not being removed must be kept in the neutral position or the interlocking parts lock the bars. Start with 1st-reverse yoke assembly. When removing the interlock balls, detent balls, and springs, remove the interlock and detent balls before removing the springs. Procedure - 1. With the housing rear to the right, lay the assembly on a flat surface. 6. Remove 4th-5th yoke assembly. Shift Bar Housing 2. In order to remove the front retaining capscrews, shift 4th-5th yoke assembly into 4th gear position (rearward). 3. Remove capscrews and retainers. 7. Inspect the yoke pad bushings. If the pads are worn, remove worn pad from shift yoke, install new pad and bend tabs over yoke top and bottom. 4. Remove 1st-reverse yoke assembly. 8. Inspect the yokes. If the yokes are damaged, remove by driving the roll pin through the yoke and rail. 9. Remove the interlock balls, detent balls, and springs. 5. Remove 2nd-3rd yoke assembly and interlock pin. 41

46 How to Assemble the FS-6205/6305 Shift Bar Housing Special Instructions Interlock balls, detent balls, and springs can be used interchangeably. Lubricate yoke pads and inserts with oil before assembly. Lubricate yoke bar grooves with grease before assembly. Keep yoke bars in neutral while assembling. The shift yoke retainer holes are not tapped on new shift bar housings. The capscrews that are used are "thread forming" and can be reused if the shift bar housing is replaced. It may be necessary to support the yoke bars in position while installing the retainers. Procedure - 1. Install interlock balls, detent balls and springs in the following sequence; A. Position (3) balls in the reverse light switch bore. B. Install 1st-reverse detent spring and ball. C. Position (2) balls in adjacent cross bore. D. Install 2nd-3rd detent spring and ball. E. Position (2) balls in adjacent cross bore F. Install 4th-5th detent spring and ball. 3. Install the interlock pin in 2nd-3rd yoke assembly. 4. Position 2nd-3rd yoke in housing assembly. Note: Balls and springs can be used interchangeably. 5. Position 4th-5th yoke in housing assembly. 2. Position 1st-reverse yoke in housing assembly as shown. 6. Position retainers, front retainer in rear set of holes. 42

47 7. Install the capscrews in the middle and rear retainer. Tighten all rail support capscrews to lbs. ft. (27-34 N m). Note: It may be necessary to support rails in proper position while installing rail supports. Final Check Make sure interlocking system is working - can't shift into 2 gears at the same time. 8. Carefully shift the 4th-5th yoke into 4th gear position (rearward). 9. Install the capscrews in front retainer. Tighten all rail support capscrews to lbs. ft. (27-34 N m). Shift Bar Housing 43

48 How to Disassemble the FS-5306/6306/5406/6406 Shift Bar Housing Special Instructions The shift bar housing must be removed from the transmission. During disassembly, lay all parts on a clean bench in order of removal to facilitate assembly. Shift bars not being removed must be kept in the neutral position or the interlocking parts lock the bars. Start with reverse yoke assembly. When removing the interlock balls, detent balls, and springs, remove the interlock and detent balls before removing the springs. Procedure - 6. Remove 3rd-4th yoke assembly and interlock pin. 1. With the housing rear to the right, lay the assembly on a flat surface. 2. In order to remove the front retaining capscrews, shift 5th-6th yoke assembly into 5th gear position (rearward). 3. Remove capscrews and retainers. 7. Remove 5th-6th yoke assembly. 4. Remove reverse yoke assembly. 8. Inspect the yoke pad bushings. If the pads are worn, remove worn pad from shift yoke, install new pad and bend tabs over yoke top and bottom. 5. Remove 1st-2nd yoke assembly and interlock pin. 44

49 9. Inspect the yokes. If the yokes are damaged, remove by driving the roll pin through the yoke and rail. 10. Remove the interlock balls, detent balls, and springs. Shift Bar Housing 45

50 How to Assemble the FS-5306/6306/5406/6406 Shift Bar Housing Special Instructions Interlock balls, detent balls, and springs can be used interchangeably. Lubricate yoke pads and inserts with oil before assembly. Lubricate yoke bar grooves with grease before assembly. Keep yoke bars in neutral while assembling. The shift yoke retainer holes are not tapped on new shift bar housings. The capscrews that are used are "thread forming" and can be reused if the shift bar housing is replaced. It may be necessary to support the yoke bars in position while installing the retainers. Procedure - 4. Position 1st-2nd yoke in housing assembly. 1. Install interlock balls, detent balls and springs in the following sequence; A. Position (3) balls in the reverse light switch bore. B. Install reverse detent spring and ball. C. Position (2) balls in adjacent cross bore. D. Repeat steps B and C for 1st-2nd position, 3rd-4th position, and 5th-6th position. Note: Balls and springs can be used interchangeably. 5. Install the interlock pin in 3rd-4th yoke assembly. 2. Position reverse yoke in housing assembly as shown. 6. Position 3rd-4th yoke in housing assembly. 7. Position 5th-6th shift block in housing assembly. 3. Install the interlock pin in 1st-2nd yoke assembly. 46

51 8. Position retainers, front retainer in rear set of holes. 9. Install the capscrews in the middle and rear retainers. Tighten all rail support capscrews to lbs. ft. (27-34 N m). Final Check Make sure interlocking system is working - can't shift into 2 gears at the same time. Note: It may be necessary to support rails in proper position while installing rail supports. 10. Carefully shift the 5th-6th yoke into 5th gear position (rearward). Shift Bar Housing 11. Install the capscrews in front retainer. Tighten all rail support capscrews to lbs. ft. (27-34 N m). 47

52 How to Disassemble the FSO-6406/8406 Shift Bar Housing Special Instructions The shift bar housing must be removed from the transmission. During disassembly, lay all parts on a clean bench in order of removal to facilitate assembly. Shift bars not being removed must be kept in the neutral position or the interlocking parts lock the bars. Start with 5th-6th yoke assembly. When removing the interlock balls, detent balls, and springs, remove the interlock and detent balls before removing the springs. Procedure - 6. Remove 1st-2nd yoke assembly and interlock pin. 1. With the housing rear to the right, lay the assembly on a flat surface. 2. Remove capscrews and retainers. 7. Remove reverse yoke assembly. 3. Remove 5th-6th yoke assembly. 4. Remove 5th-6th shift block. 8. Inspect the yoke pad bushings. If the pads are worn, remove worn pad from shift yoke, install new pad and bend tabs over yoke top and bottom. 5. Remove 3rd-4th yoke assembly and interlock pin. 48