John Deere Front-Wheel Drive Axles 730 733 740 745 & 750 TECHNICAL MANUAL - PDF DOWNLOAD

Front-Wheel Drive Axles 730, 733, 740, 745 and 750

COMPONENT TECHNICAL MANUAL Front-Wheel Drive Axles 730, 733, 740, 745 and 750 CTM4820 01JUL03 (ENGLISCH)

John Deere Werke Mannheim Worldwide Edition Printed in Germany

Introduction Foreword This manual is written for an experienced technician.

Essential tools required in performing certain service work are identified in this manual and are recommended for use.

Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.

This is the safety-alert symbol. When you see this symbol on the machine or in this manual, be alert to the potential for personal injury.

Use this Component Technical Manual in conjunction with the machine Technical Manual. An application

listing in the introduction identifies product-model/component type-model relationship. See the machine technical manual for information on component removal and installation, and gaining access to the components.

Component Technical Manuals are concise service guides for specific components. Component Technical Manuals are written as stand-alone manuals covering multiple machine applications.

Fundamental service information is available from other sources covering basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes.

LX24603,0000299 –19–14NOV01–1/1

CTM4820 (01JUL03)

Front-Wheel Drive Axles 082903

PN=2

Introduction

General Information This Component Technical Manual contains service information and a description of the assembly and method of operation of the following front-wheel drive axles: • 700 Series 730, 733, 740, 745 and 750.

Triple Link Suspension (TLS) is dealt with NOT in this Component Technical Manual but in the Technical Manuals of the relevant tractor types.

LX24603,0000303 –19–01JUN03–1/1

CTM4820 (01JUL03)

Front-Wheel Drive Axles 082903

PN=3

Introduction

LX1031381

–UN–13AUG03

Front-Wheel Drive Axles - Survey

LX1031382

–UN–13AUG03

Standard 730

750 with TLS and multi-disk brake

LX24603,00002EE –19–01JUN03–1/3

CTM4820 (01JUL03)

Front-Wheel Drive Axles 082903

PN=4

Introduction

Refer to the axle type shown on the plate to identify repair information in the Component Technical Manual.

A—Axle type/design B—Axle serial number C—Tractor model D—Ratio

LX1029076

The type plate on 730, 733 and 740 front-wheel drive axles is located on the right-hand side of the axle housing, whereas on 745 and 750 axles it is located on the left-hand side of the axle housing.

–UN–22AUG02

Type plate

LX24603,00002EE –19–01JUN03–2/3

CTM4820 (01JUL03)

Front-Wheel Drive Axles 082903

PN=5

Introduction Axle options Tractors (not for North America)

730

6020

X

6120 and 6220

Xa

6320 and 6420

X

733

740

745

Xb, a, c, d Xa, c, d

6420S

Xa, c, d

6520 and 6620

Xa, c, d

6820

Xa, c, d

6920 and 6920S 6215

X

6515 SE tractors: 6020, 6120, 6220, 6320 and 6420

X X

SE tractors: 6520 and 6620

Tractors (North America) 6120 and 6220

X

730 X

733

Xa, c

6420

Xa, c, d

6320L, 6420L and 6520L 7220 and 7320 7420 7520

745

750

X

6615 and 6715 6120L, 6220L, 6320L and 6420L

740

a

6320

6215 and 6415

750

X X X Xa, d Xa, d Xa, d

a

also available with TLS

b

also available as narrow track

c

also available with TLS and multi-disk brake

d

also available with AutoTrac

LX24603,00002EE –19–01JUN03–3/3

CTM4820 (01JUL03)

Front-Wheel Drive Axles 082903

PN=6

Contents Front-Wheel Drive Axles Group 00—Safety Information Group 01—General Repair Information Group 05—Steering Cylinder and Tie-Rods Group 10—Planetary Drive and Wheel Hub Group 15—Knuckle Housing and Drive Shafts Group 20—Axle Housing and Differential Group 200—Description and Theory of Operation

INDX

All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.

COPYRIGHT  2003 DEERE & COMPANY European Office Mannheim All rights reserved A John Deere ILLUSTRUCTION Manual Previous Editions Copyright  2002

CTM4820 (01JUL03)

i

Front-Wheel Drive Axles 082903

PN=1

Contents

INDX

CTM4820 (01JUL03)

ii

Front-Wheel Drive Axles 082903

PN=2

Front-Wheel Drive Axles Contents Page

Page

Group 00—Safety Information Recognize Safety Information . . . . . . . . . . . . . . . . 00-1 “Important” - Information . . . . . . . . . . . . . . . . . . . . 00-1 “Note” - Information . . . . . . . . . . . . . . . . . . . . . . . . 00-1 Prevent Machine Runaway . . . . . . . . . . . . . . . . . . 00-1 Handle Fluids Safely—Avoid Fires . . . . . . . . . . . . 00-2 Prepare for Emergencies. . . . . . . . . . . . . . . . . . . . 00-2 Avoid High-Pressure Fluids . . . . . . . . . . . . . . . . . . 00-3 Remove Paint Before Welding or Heating . . . . . . . 00-4 Avoid Heating Near Pressurized Fluid Lines . . . . . 00-4 Work In Ventilated Area . . . . . . . . . . . . . . . . . . . . 00-5 Wear Protective Clothing. . . . . . . . . . . . . . . . . . . . 00-5 Practice Safe Maintenance . . . . . . . . . . . . . . . . . . 00-6 Park Machine Safely . . . . . . . . . . . . . . . . . . . . . . . 00-6 Use Proper Lifting Equipment . . . . . . . . . . . . . . . . 00-7 Construct Dealer-Made Tools Safely . . . . . . . . . . . 00-7 Support Machine Properly . . . . . . . . . . . . . . . . . . . 00-7 Work in Clean Area. . . . . . . . . . . . . . . . . . . . . . . . 00-8 Illuminate Work Area Safely . . . . . . . . . . . . . . . . . 00-8 Service Machines Safely . . . . . . . . . . . . . . . . . . . . 00-8 Use Proper Tools . . . . . . . . . . . . . . . . . . . . . . . . . 00-9 Service Tires Safely . . . . . . . . . . . . . . . . . . . . . . . 00-9 Service Front-Wheel Drive Tractor Safely . . . . . . 00-10 Dispose of Waste Properly . . . . . . . . . . . . . . . . . 00-10 Live With Safety . . . . . . . . . . . . . . . . . . . . . . . . . 00-11 Retighten Wheel Nuts . . . . . . . . . . . . . . . . . . . . . 00-11 Mixing of Lubricants . . . . . . . . . . . . . . . . . . . . . . 00-11 Lubricant Storage . . . . . . . . . . . . . . . . . . . . . . . . 00-12

Check and Adjust Tread (Basic Adjustment) . . . . 05-16 Check and Adjust Toe-In. . . . . . . . . . . . . . . . . . . 05-18 Check and Adjust Steering Angle . . . . . . . . . . . . 05-20 Group 10—Planetary Drive and Wheel Hub Special or Essential Tools . . . . . . . . . . . . . . . . . . . 10-1 Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 Planetary Drive and Wheel Hub Sectional View (Without Multi-Disk Brake) . . . . . 10-4 Planetary Drive, Multi-Disk Brake and Wheel Hub - Sectional View . . . . . . . . . . . . . . . 10-6 Planetary Drive - Exploded View (Without Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-8 Planetary Drive Removal (Without Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-9 Planetary Drive Reconditioning (Without Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-10 Planetary Drive Installation (Without Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-14 Planetary Drive and Multi-Disk Brake— Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . 10-16 Planetary Drive and Multi-Disk Brake Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17 Planetary Drive Reconditioning (With Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-20 Planetary Drive and Multi-Disk Brake Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23 Check Multi-Disk Brake for Leaks . . . . . . . . . . . . 10-28 Planetary Drive - Fill With Oil . . . . . . . . . . . . . . . 10-29 Wheel Hub - Exploded View . . . . . . . . . . . . . . . . 10-30 Remove Wheel Hub . . . . . . . . . . . . . . . . . . . . . . 10-31 Recondition the Wheel Hub. . . . . . . . . . . . . . . . . 10-32 Installing the Wheel Hub . . . . . . . . . . . . . . . . . . . 10-34

Group 01—General Repair Information General Safety and Repair Information . . . . . . . . . 01-1 Front-Wheel-Drive Axles - Torques for Bolts and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-2 Group 05—Steering Cylinder and Tie-Rods Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-2 Steering Cylinder and Tie-Rods — Sectional View . . . . . . . . . . . . . . . . . . . . . . . . . . 05-3 Steering Cylinder and Tie-Rods — Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . 05-4 Removing the Tie Rods. . . . . . . . . . . . . . . . . . . . . 05-5 Remove the Steering Cylinder. . . . . . . . . . . . . . . . 05-6 Recondition the Steering Cylinder . . . . . . . . . . . . . 05-7 Install the Steering Cylinder . . . . . . . . . . . . . . . . 05-12 Install the Tie-Rods . . . . . . . . . . . . . . . . . . . . . . . 05-13 CTM4820 (01JUL03)

Group 15—Knuckle Housing and Drive Shafts Special or Essential Tools . . . . . . . . . . . . . . . . . . .

Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Knuckle Housing and Drive Shaft Sectional View . . . . . . . . . . . . . . . . . . . . . . . . . .

Knuckle Housing and Drive Shaft Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . .

Remove Knuckle Housing . . . . . . . . . . . . . . . . . . .

15-1 15-3 15-4 15-5 15-8 15-9

Continued on next page

1

Front-Wheel Drive Axles 082903

PN=1

Contents

Page

Recondition the Knuckle Housing and King Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Knuckle Housing . . . . . . . . . . . . . . . . . . . .

Knuckle Housing — Adjust the Preload at the Knuckle Pin Bearings. . . . . . . . . . . . . . . . .

Knuckle Housing — Remove and Install the Steering Angle Sensor . . . . . . . . . . . . . . . .

Removing the Drive Shafts . . . . . . . . . . . . . . . . .

Recondition the Drive Shafts . . . . . . . . . . . . . . . .

Installing the Drive Shafts . . . . . . . . . . . . . . . . . .

15-11 15-15 15-20 15-22 15-23 15-24 15-27

Group 20—Axle Housing and Differential Special or Essential Tools . . . . . . . . . . . . . . . . . . . 20-1 Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-3 Differential — Sectional View . . . . . . . . . . . . . . . . 20-4 Differential — Exploded View . . . . . . . . . . . . . . . . 20-8 Axle Housing - Exploded View . . . . . . . . . . . . . . 20-10 Removing the Axle Housing . . . . . . . . . . . . . . . . 20-12 Repairing the Axle Housing . . . . . . . . . . . . . . . . . 20-13 Installing the Axle Housing . . . . . . . . . . . . . . . . . 20-14 Remove the Bevel Pinion Drive Shaft . . . . . . . . . 20-15 Repairing the Bevel Pinion Drive Shafts . . . . . . . 20-17 Install the Bevel Pinion Drive Shaft . . . . . . . . . . . 20-18 Removing the Differential . . . . . . . . . . . . . . . . . . 20-24 Recondition the Differential . . . . . . . . . . . . . . . . . 20-25 Install Differential. . . . . . . . . . . . . . . . . . . . . . . . . 20-34 Axle Housing - Fill with Oil . . . . . . . . . . . . . . . . . 20-39 Group 200—Description and Theory of Operation Front Wheel Drive Axles - Summary of References . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-1 Description of Front Wheel Drive. . . . . . . . . . . . . 200-2 Layout of Front Axle . . . . . . . . . . . . . . . . . . . . . . 200-3 Operation of Differential . . . . . . . . . . . . . . . . . . . 200-5 Operation of Self-Locking Differential . . . . . . . . . 200-7 Operation of Planetary Drive . . . . . . . . . . . . . . . . 200-8 Operation of Multi-Disk Brake . . . . . . . . . . . . . . . 200-9 Positive Front Wheel Lead Check . . . . . . . . . . . 200-10

CTM4820 (01JUL03)

2

Front-Wheel Drive Axles 082903

PN=2

Group 00

Safety Information Recognize Safety Information

00 1

–UN–07DEC88

This is a safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the potential for personal injury.

T81389

Follow recommended precautions and safe operating practices.

DX,ALERT –19–29SEP98–1/1

“Important” - Information Information marked as IMPORTANT points out problems that may lead to machine damage. By following the directions given, these problems can be avoided.

LX,CRA05 002885 –19–09APR92–1/1

“Note” - Information When marked with NOTE the information given is more detailed or contains restrictions to directions given previously. On the other hand useful information may be given belonging to certain instructions without being directly connected to them.

LX,CRA05 002886 –19–09APR92–1/1

Prevent Machine Runaway Avoid possible injury or death from machinery runaway.

–UN–11JAN89

Do not start engine by shorting across starter terminals.

Machine will start in gear if normal circuitry is bypassed.

TS177

NEVER start engine while standing on ground. Start engine only from operator’s seat, with transmission in neutral or park.

DX,BYPAS1 –19–29SEP98–1/1

CTM4820 (01JUL03)

00-1

Front-Wheel Drive Axles 082903

PN=11

Safety Information

Handle Fluids Safely—Avoid Fires

Store flammable fluids away from fire hazards. Do not incinerate or puncture pressurized containers.

Make sure machine is clean of trash, grease, and debris.

TS227

Do not store oily rags; they can ignite and burn spontaneously.

–UN–23AUG88

When you work around fuel, do not smoke or work near heaters or other fire hazards.

DX,FLAME –19–29SEP98–1/1

Prepare for Emergencies Be prepared if a fire starts.

Keep emergency numbers for doctors, ambulance service, hospital, and fire department near your telephone.

–UN–23AUG88

Keep a first aid kit and fire extinguisher handy.

TS291

00 2

DX,FIRE2 –19–03MAR93–1/1

CTM4820 (01JUL03)

00-2

Front-Wheel Drive Axles 082903

PN=12

Safety Information

Avoid High-Pressure Fluids

00 3

Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

X9811

Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure.

–UN–23AUG88

Escaping fluid under pressure can penetrate the skin causing serious injury.

If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A.

DX,FLUID –19–03MAR93–1/1

CTM4820 (01JUL03)

00-3

Front-Wheel Drive Axles 082903

PN=13

Safety Information

Remove Paint Before Welding or Heating Avoid potentially toxic fumes and dust.

• Remove paint a minimum of 100 mm (4 in.) from area to be affected by heating. If paint cannot be removed, wear an approved respirator before heating or welding.

• If you sand or grind paint, avoid breathing the dust.

Wear an approved respirator.

• If you use solvent or paint stripper, remove stripper with soap and water before welding. Remove solvent or paint stripper containers and other flammable material from area. Allow fumes to disperse at least 15 minutes before welding or heating.

TS220

Remove paint before heating:

–UN–23AUG88

Hazardous fumes can be generated when paint is heated by welding, soldering, or using a torch.

Do not use a chlorinated solvent in areas where welding will take place.

Do all work in an area that is well ventilated to carry toxic fumes and dust away.

Dispose of paint and solvent properly.

DX,PAINT –19–24JUL02–1/1

Flammable spray can be generated by heating near pressurized fluid lines, resulting in severe burns to yourself and bystanders. Do not heat by welding, soldering, or using a torch near pressurized fluid lines or other flammable materials. Pressurized lines can be accidentally cut when heat goes beyond the immediate flame area.

–UN–15MAY90

Avoid Heating Near Pressurized Fluid Lines

TS953

00 4

DX,TORCH –19–03MAR93–1/1

CTM4820 (01JUL03)

00-4

Front-Wheel Drive Axles 082903

PN=14

Safety Information

Work In Ventilated Area

00 5

TS220

If you do not have an exhaust pipe extension, open the doors and get outside air into the area

–UN–23AUG88

Engine exhaust fumes can cause sickness or death. If it is necessary to run an engine in an enclosed area, remove the exhaust fumes from the area with an exhaust pipe extension.

DX,AIR –19–17FEB99–1/1

Wear Protective Clothing

Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises.

TS206

Prolonged exposure to loud noise can cause impairment or loss of hearing.

–UN–23AUG88

Wear close fitting clothing and safety equipment appropriate to the job.

Operating equipment safely requires the full attention of the operator. Do not wear radio or music headphones while operating machine.

DX,WEAR –19–10SEP90–1/1

CTM4820 (01JUL03)

00-5

Front-Wheel Drive Axles 082903

PN=15

Safety Information

Practice Safe Maintenance Understand service procedure before doing work. Keep area clean and dry.

Never lubricate, service, or adjust machine while it is moving. Keep hands, feet , and clothing from power-driven parts. Disengage all power and operate controls to relieve pressure. Lower equipment to the ground. Stop the engine. Remove the key. Allow machine to cool.

Securely support any machine elements that must be raised for service work.

On towed implements, disconnect wiring harnesses from tractor before servicing electrical system components or welding on machine.

TS218

On self-propelled equipment, disconnect battery ground cable (-) before making adjustments on electrical systems or welding on machine.

–UN–23AUG88

Keep all parts in good condition and properly installed. Fix damage immediately. Replace worn or broken parts.

Remove any buildup of grease, oil, or debris.

DX,SERV –19–17FEB99–1/1

Park Machine Safely

• • • •

Lower all equipment to the ground.

Stop the engine and remove the key.

Disconnect the battery ground strap.

Hang a "DO NOT OPERATE" tag in operator station.

–UN–24MAY89

Before working on the machine:

TS230

00 6

DX,PARK –19–04JUN90–1/1

CTM4820 (01JUL03)

00-6

Front-Wheel Drive Axles 082903

PN=16

Safety Information

Use Proper Lifting Equipment

00 7

Lifting heavy components incorrectly can cause severe injury or machine damage.

TS226

–UN–23AUG88

Follow recommended procedure for removal and installation of components in the manual.

DX,LIFT –19–04JUN90–1/1

Construct Dealer-Made Tools Safely

LX1016749

Do not weld tools unless you have the proper equipment and experience to perform the job.

–UN–01JUL97

Faulty or broken tools can result in serious injury. When constructing tools, use proper, quality materials, and good workmanship.

DX,SAFE,TOOLS –19–10OCT97–1/1

Do not support the machine on cinder blocks, hollow tiles, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack.

Follow recommended procedures in this manual.

TS229

Always lower the attachment or implement to the ground before you work on the machine. If the work requires that the machine or attachment be lifted, provide secure support for them. If left in a raised position, hydraulically supported devices can settle or leak down.

–UN–23AUG88

Support Machine Properly

When implements or attachments are used with a machine, always follow safety precautions listed in the implement or attachment operator’s manual.

DX,LOWER –19–24FEB00–1/1

CTM4820 (01JUL03)

00-7

Front-Wheel Drive Axles 082903

PN=17

Safety Information

Work in Clean Area

Clean work area and machine.

Make sure you have all necessary tools to do your job.

Have the right parts on hand.

Read all instructions thoroughly; do not attempt shortcuts.

T6642EJ

• • • •

–UN–18OCT88

Before starting a job:

DX,CLEAN –19–04JUN90–1/1

TS223

Illuminate your work area adequately but safely. Use a portable safety light for working inside or under the machine. Make sure the bulb is enclosed by a wire cage.

The hot filament of an accidentally broken bulb can ignite spilled fuel or oil.

–UN–23AUG88

Illuminate Work Area Safely

DX,LIGHT –19–04JUN90–1/1

Service Machines Safely

–UN–23AUG88

Tie long hair behind your head. Do not wear a necktie, scarf, loose clothing, or necklace when you work near machine tools or moving parts. If these items were to get caught, severe injury could result.

Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts.

TS228

00 8

DX,LOOSE –19–04JUN90–1/1

CTM4820 (01JUL03)

00-8

Front-Wheel Drive Axles 082903

PN=18

Safety Information

Use Proper Tools

00 9

Use tools appropriate to the work. Makeshift tools and procedures can create safety hazards.

–UN–08NOV89

Use power tools only to loosen threaded parts and fasteners.

TS779

For loosening and tightening hardware, use the correct size tools. DO NOT use U.S. measurement tools on metric fasteners. Avoid bodily injury caused by slipping wrenches.

Use only service parts meeting John Deere specifications.

DX,REPAIR –19–17FEB99–1/1

Service Tires Safely Explosive separation of a tire and rim parts can cause serious injury or death.

Do not attempt to mount a tire unless you have the proper equipment and experience to perform the job.

Always maintain the correct tire pressure. Do not inflate the tires above the recommended pressure. Never weld or heat a wheel and tire assembly. The heat can cause an increase in air pressure resulting in a tire explosion.

Welding can structurally weaken or deform the wheel.

TS211

Check wheels for low pressure, cuts, bubbles, damaged rims or missing lug bolts and nuts.

–UN–23AUG88

When inflating tires, use a clip-on chuck and extension hose long enough to allow you to stand to one side and NOT in front of or over the tire assembly. Use a safety cage if available.

DX,RIM –19–24AUG90–1/1

CTM4820 (01JUL03)

00-9

Front-Wheel Drive Axles 082903

PN=19

Safety Information

L124515

When servicing front-wheel drive tractor with the rear wheels supported off the ground and rotating wheels by engine power, always support front wheels in a similar manner. Loss of electrical power or transmission/ hydraulic system pressure will engage the front driving wheels, pulling the rear wheels off the support if front wheels are not raised. Under these conditions, front drive wheels can engage even with switch in disengaged position.

–UN–06AUG94

Service Front-Wheel Drive Tractor Safely

LX,MFWD2 –19–01MAY91–1/1

Dispose of Waste Properly

Use leakproof containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them.

Do not pour waste onto the ground, down a drain, or into any water source.

–UN–26NOV90

Improperly disposing of waste can threaten the environment and ecology. Potentially harmful waste used with John Deere equipment include such items as oil, fuel, coolant, brake fluid, filters, and batteries.

TS1133

00 10

Air conditioning refrigerants escaping into the air can damage the Earth’s atmosphere. Government regulations may require a certified air conditioning service center to recover and recycle used air conditioning refrigerants.

Inquire on the proper way to recycle or dispose of waste from your local environmental or recycling center, or from your John Deere dealer.

DX,DRAIN –19–03MAR93–1/1

CTM4820 (01JUL03)

00-10

Front-Wheel Drive Axles 082903

PN=20

Safety Information

Live With Safety

00 11

TS231

–19–07OCT88

Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields.

DX,LIVE –19–25SEP92–1/1

Retighten Wheel Nuts

L124516

–UN–03JAN95

Retighten wheel nuts at the intervals specified in the Operator’s Manual section “Break-In Period”.

LX,CRA05 002995 –19–21APR92–1/1

Mixing of Lubricants In general, avoid mixing different brands or types of oil.

Oil manufacturers blend additives in their oils to meet certain specifications and performance requirements.

Consult your John Deere dealer to obtain specific information and recommendations.

Mixing different oils can interfere with the proper functioning of these additives and degrade lubricant performance.

DX,LUBMIX –19–18MAR96–1/1

CTM4820 (01JUL03)

00-11

Front-Wheel Drive Axles 082903

PN=21

Safety Information 00 12

Lubricant Storage Your equipment can operate at top efficiency only when clean lubricants are used.

Make certain that all containers are properly marked to identify their contents.

Use clean containers to handle all lubricants.

Properly dispose of all old containers and any residual lubricant they may contain.

Whenever possible, store lubricants and containers in an area protected from dust, moisture, and other contamination. Store containers on their side to avoid water and dirt accumulation.

DX,LUBST –19–18MAR96–1/1

CTM4820 (01JUL03)

00-12

Front-Wheel Drive Axles 082903

PN=22

Group 01

General Repair Information General Safety and Repair Information CAUTION: When performing repair work comply with the following repair information as well as the safety rules given at the beginning of this manual! See "Safety Information" in Group 00.

NOTE: The illustrations show parts and procedure on one axle type, repair procedures however are the same for all axle types.

Before performing service work on front axles, clean them thoroughly.

Specified special tools must be used for service work.

These special tools have the appropriate dimensions and therefore correct positioning is ensured.

Damaged or excessively worn parts must be replaced.

An experienced technician must evaluate whether parts may be re-installed which are subjected to a normal wear process (e.g. roller bearings, thrust plates etc.).

Always replace parts like seals, O-rings, self-locking screws and nuts.

Before re-installation of parts remove all gasket material from sealing surfaces of housings. Remove any burrs etc. using a whetstone.

Take extreme care to avoid that shavings or other foreign material remain in housing.

01 1

Apply clean hydraulic oil to all bearings before installing them.

For heating parts (bearings for example) only appropriate heating devices must be used (oven, hot air blower etc.). Under no circumstances exceed specified temperature limits!

When heated parts have been installed, reseat them after they have cooled down to ensure correct fit.

When re-assembling the front-wheel-drive axles note the torques for hardware and specifications for adjustments.

Unless otherwise specified tighten bolts and nuts to the torques listed in the enclosed charts. See "Front-Wheel-Drive Axles - Torques for Bolts and Nuts" in this Group.

After repair work has been completed make sure that the front-wheel-drive axle operates correctly.

The following and additional information can be found under "Specifications", Section 10, Group 05 of the Repair Technical Manual.

• For capacities, see "Capacities".

• For lubricant specifications, see "Front Wheel Drive Axle Oil".

• For grease specifications, see "Grease".

Check that lubrication bores or grooves are not restricted.

LX24603,0000343 –19–01JUL02–1/1

CTM4820 (01JUL03)

01-1

Front-Wheel Drive Axles 082903

PN=23

General Repair Information 01 2

Front-Wheel-Drive Axles - Torques for Bolts and Nuts DO NOT use these values if a different torque value or tightening procedure is given for a specific application.

Torque values listed are for general use only. Torque values listed are for general use only.

Make sure fasteners threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening.

Use only a torque wrench to tighten bolts and nuts.

Fasteners should be replaced with the same or higher grade. If higher grade fasteners are used, these should only be tightened to the strength of the original.

Metric ISO Standard Threads (N•m) Grade

8.8

10.9

12.9

Loctite

242

270

242

270

242

270

Dimension

N•m

N•m

N•m

N•m

N•m

N•m

M6x1

9-10

10-11

14-16

15-17

16-18

18-20

M8x1.25

24-26

26-28

34-38

37-40

39-43

44-48

M10x1.5

48-53

52-58

68-75

73-81

80-88

88-97

M12x1.75

82-91

90-100

116-128

126-139

139-153

152-168

M14x2

129-143

143-158

182-202

200-221

221-244

238-263

M16x2

200-221

219-242

283-312

309-341

337-373

371-410

M18x2.5

276-305

299-331

390-431

428-473

466-515

509-562

M20x2.5

390-431

428-473

553-611

603-667

660-730

722-798

M22x2.5

523-578

575-635

746-824

817-903

893-987

974-1076

M24x3

675-746

732-809

950-1050

1040-1150

1140-1260

1240-1370

M27x3

998-1103

1088-1202

1411-1559

1539-1701

1710-1890

1838-2032

M30x3.5

1378-1523

1473-1628

1914-2115

2085-2305

2280-2520

2494-2757

Continued on next page

CTM4820 (01JUL03)

01-2

LX24603,0000304 –19–01JUL02–1/3

Front-Wheel Drive Axles 082903

PN=24

General Repair Information 01 3

Metric ISO Standard Threads (lb-ft) Grade Loctite Dimension

8.8 242

10.9 270

12.9

242

270

242

270

lb-ft

lb-ft

lb-ft

lb-ft

lb-ft

lb-ft

M6x1

13-14

14-16

19-21

21-23

22-24

25-27

M8x1.25

32-36

35-39

46-51

50-55

53-58

59-65

M10x1.5

65-72

71-79

92-102

99-110

108-119

119-132

M12x1.75

111-123

122-136

157-174

171-188

188-207

206-228

M14x2

175-194

194-214

247-274

271-300

300-331

323-357

M16x2

271-300

297-328

384-423

419-462

457-506

503-556

M18x2.5

374-414

405-449

529-584

580-641

632-698

690-762

M20x2.5

529-584

580-641

750-828

818-904

895-990

979-1082

M22x2.5

709-784

780-861

1011-1117

1108-1224

1211-1338

1321-1459

M24x3

915-1011

992-1097

1288-1424

1410-1559

1546-1708

1681-1857

M27x3

1353-1495

1475-1630

1913-2114

2087-2306

2318-2562

2492-2755

M30x3.5

1868-2065

1997-2207

2595-2868

2827-3125

3091-3417

3381-3738

Metric ISO Fine Threads (N•m) Grade Loctite

8.8 242

10.9 270

242

12.9 270

242

270

Dimension

N•m

N•m

N•m

N•m

N•m

N•m

M8x1

26-28

27-30

36-40

40-44

43-47

47-52

M10x1.25

49-55

55-61

71-78

78-86

86-94

93-103

M12x1.25

90-100

98-109

128-142

139-154

152-168

166-184

M12x1.5

86-95

94-104

120-132

133-147

143-158

159-175

M14x1.5

143-158

157-173

200-222

219-242

238-263

261-289

M16x1.5

214-236

233-257

302-334

333-368

361-399

394-436

M18x1.5

312-345

342-378

442-489

485-536

527-583

580-641

M20x1.5

437-483

475-525

613-677

674-745

736-814

808-893

M22x1.5

581-642

637-704

822-908

903-998

998-1103

1078-1191

M24x2

741-819

808-893

1045-1155

1140-1260

1235-1365

1363-1507

M27x2

1083-1197

1178-1302

1520-1680

1672-1848

1834-2027

2000-2210

M30x2

1511-1670

1648-1822

2138-2363

2332-2577

2565-2835

2788-3082

Continued on next page

CTM4820 (01JUL03)

01-3

LX24603,0000304 –19–01JUL02–2/3

Front-Wheel Drive Axles 082903

PN=25

General Repair Information 01 4

Metric ISO Fine Threads (lb-ft) Grade Loctite Dimension M8x1

8.8 242

10.9 270

242

12.9 270

242

270

lb-ft

lb-ft

lb-ft

lb-ft

lb-ft

lb-ft

358-38

37-41

49-54

55-60

58-64

64-71

M10x1.25

67-74

75-83

97-106

106-117

117-127

126-140

M12x1.25

122-136

133-148

173-192

188-209

206-228

225-250

M12x1.5

117-129

127-141

163-179

180-199

194-214

216-237

M14x1.5

194-214

213-235

271-301

297-328

323-357

354-392

M16x1.5

290-320

316-348

409-453

451-499

489-541

534-591

M18x1.5

423-468

464-512

599-663

658-727

714-790

786-869

M20x1.5

592-655

644-712

831-918

914-1010

998-1104

1095-1211

M22x1.5

788-870

864-954

1114-1231

1224-1353

1353-1495

1462-1615

M24x2

1005-1110

1095-1211

1417-1566

154-1708

1674-18510

1848-2043

M27x2

1468-1623

1597-1765

2061-2278

2267-2506

2487-2748

2712-2996

M30x2

2049-2264

2234-2470

2899-3204

3162-3494

3478-3844

3780-4179

LX24603,0000304 –19–01JUL02–3/3

CTM4820 (01JUL03)

01-4

Front-Wheel Drive Axles 082903

PN=26

Group 05

Steering Cylinder and Tie-Rods Other Material

05 1

Number

Name

Use

L414751 (U.S.) 243 (LOCTITE)

Thread lock

Install tie-rods on steering cylinder piston rod.

Install the steering cylinder assembly.

L81050 (U.S.) MOLYKOTE G (U.S.)

Special grease

Steering cylinder, install flange on cylinder sleeve.

Install steering cylinder on axle housing.

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,00002FD –19–01JUN03–1/1

CTM4820 (01JUL03)

05-1

Front-Wheel Drive Axles 082903

PN=27

Steering Cylinder and Tie-Rods 05 2

Specifications Item

Measurement

Specification

Steering cylinder on axle housing, cap screws

Torque

129 to 143 N•m 95 to 105 lb-ft

730

Torque

240 to 270 N•m 177 to 199 lb-ft

733, 740, 745, 750

Torque

360 to 400 N•m 265 to 295 lb-ft

730, 733

Torque

200 to 220 N•m 148 to 162 lb-ft

740, 745, 750

Torque

350 to 390 N•m 258 to 287 lb-ft

730

Torque

220 to 240 N•m 162 to 177 lb-ft

733, 740, 745, 750

Torque

328 to 363 N•m 242 to 267 lb-ft

Front-wheel drive axle

Toe-in

1.5 mm 0.06 in.

Steering angle, locknut on adjusting screw

Torque

120 N•m 89 lb-ft

Tie-rods on piston rod

Tie-rod to knuckle housing, self-locking nut

Tie-rods, locknut

LX24603,0000305 –19–01JUN03–1/1

CTM4820 (01JUL03)

05-2

Front-Wheel Drive Axles 082903

PN=28

Steering Cylinder and Tie-Rods

Steering Cylinder and Tie-Rods — Sectional View

LX1032225

–UN–23JUL03

05 3

A—Piston rod B—Cylinder sleeve C—Guide rings D—O-ring E—Seal ring F—Flange

G—Cap screw H—Seal ring I—Snap ring J—Snap ring K—Guide

L—Wiper ring M—Back-up ring N—Grooved ring O—Spring pin P—Snap ring

Q—Tie-rod (2 used) R—Pivot S—Self-locking nut T—Steering angle adjusting screw (2 used)

NOTE: 730, 733 and 740 axles have the axle housing and steering cylinder transposed (mirror-image).

LX24603,00002F8 –19–01JUN03–1/1

CTM4820 (01JUL03)

05-3

Front-Wheel Drive Axles 082903

PN=29

Steering Cylinder and Tie-Rods

–UN–23JUL03

Steering Cylinder and Tie-Rods — Exploded View

LX1031383

05 4

A—Wiper ring B—Back-up ring C—Grooved ring

D—Snap ring E—Flange F—Cylinder sleeve G—Cap screw H—Spring pin I—Guide ring J—Seal ring

K—O-ring L—Piston rod M—Guide N—Seal ring O—Snap ring P—Snap ring Q—Cap screw

R—Self-locking nut S—Bushing1 T—Cap U—Tie-rod (2 used) V—Locknut (2 used) W—Pivot (2 used)

1

Only if dimension (x) is 90 mm (3.5 in.) or more.

Continued on next page

CTM4820 (01JUL03)

05-4

LX24603,00002F9 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=30

Steering Cylinder and Tie-Rods 05 5

NOTE: 730, 733 and 740 axles have the axle housing and steering cylinder transposed (mirror-image).

LX24603,00002F9 –19–01JUN03–2/2

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1029079

1. Remove self-locking nut.

–UN–06AUG02

Removing the Tie Rods

LX24603,00002FA –19–01JUL02–1/3

LX1029080

–UN–06AUG02

2. Press tie rod out of knuckle housing.

LX24603,00002FA –19–01JUL02–2/3

NOTE: Thread of tie rod is locked in position with thread lock L41475 (LOCTITE 243).

LX1029081

NOTE: Install tie rods, see "Installing the Tie Rods" in this Group.

–UN–06AUG02

3. Separate tie rod and piston rod.

LOCTITE is a registered trademark of the Loctite Corporation

CTM4820 (01JUL03)

LX24603,00002FA –19–01JUL02–3/3

05-5

Front-Wheel Drive Axles 082903

PN=31

Steering Cylinder and Tie-Rods

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1029082

NOTE: 730, 733 and 740 axles have the axle housing and steering cylinder transposed (mirror-image).

–UN–06AUG02

Remove the Steering Cylinder

NOTE: Remove tie-rods, see reference “Remove the Tie-Rods” in this Group.

1. Take out the screws.

LX24603,00002FB –19–01JUN03–1/2

2. Remove steering cylinder from axle housing.

Install steering cylinder, see reference “Install the Steering Cylinder” in this Group.

–UN–06AUG02

NOTE: Recondition the steering cylinder, see reference “Recondition the Steering Cylinder” in this Group.

LX1029083

05 6

LX24603,00002FB –19–01JUN03–2/2

CTM4820 (01JUL03)

05-6

Front-Wheel Drive Axles 082903

PN=32

Steering Cylinder and Tie-Rods

Recondition the Steering Cylinder

05 7

–UN–06AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1029084

NOTE: Remove steering cylinder, see reference “Remove the Steering Cylinder” in this Group.

Remove piston rod 1. Remove flange (B), if necessary. a. Remove spring pin (A). b. Remove flange (B) and snap ring (C).

LX24603,00002FC –19–01JUN03–1/13

LX1029085

–UN–06AUG02

2. Remove snap ring (A).

LX24603,00002FC –19–01JUN03–2/13

LX1029086

–UN–06AUG02

3. Push guide into cylinder sleeve and remove snap ring (A).

Continued on next page

CTM4820 (01JUL03)

05-7

LX24603,00002FC –19–01JUN03–3/13

Front-Wheel Drive Axles 082903

PN=33

Steering Cylinder and Tie-Rods 4. Remove piston rod (A) and guide (B).

LX1029088

–UN–07AUG02

5. Remove all seal rings from cylinder sleeve, piston rod and guide.

LX24603,00002FC –19–01JUN03–4/13

Install seal rings 1. Install seal rings on cylinder sleeve.

–UN–07AUG02

a. Install grooved ring (A) with the sealing lip facing inward.

LX1029897

b. Install back-up ring (B). c. Install wiper ring (C) with the dust lip facing outward. d. Check that the seal rings are installed in their correct positions.

–UN–07AUG02

A—Grooved ring B—Back-up ring C—Wiper ring

LX1029898

05 8

Continued on next page

CTM4820 (01JUL03)

05-8

LX24603,00002FC –19–01JUN03–5/13

Front-Wheel Drive Axles 082903

PN=34

Steering Cylinder and Tie-Rods 05 9

2. Install seal rings on guide. a. Install seal ring (A) on the outside of guide (B).

–UN–20AUG02

b. Install grooved ring (C) with the sealing lip facing inward.

LX1029091

c. Install back-up ring (D). d. Install wiper ring (E) with the dust lip facing outward. e. Check that the seal rings are installed in their correct positions.

LX1029896

–UN–07AUG02

LX1029895

–UN–07AUG02

A—Outer seal ring B—Guide C—Grooved ring D—Back-up ring E—Wiper ring

Continued on next page

CTM4820 (01JUL03)

05-9

LX24603,00002FC –19–01JUN03–6/13

Front-Wheel Drive Axles 082903

PN=35

Steering Cylinder and Tie-Rods 3. Install seal rings on piston. a. Install O-ring (A) in center groove.

–UN–07AUG02

b. Install seal ring (B) over O-ring (A). c. Install guide rings (C).

LX1029089

d. Check that the seal rings are installed in their correct positions.

LX1029090

–UN–07AUG02

A—O-ring B—Seal ring C—Guide ring (2 used)

LX24603,00002FC –19–01JUN03–7/13

Install piston rod

–UN–07AUG02

NOTE: Before installing, coat the sealing surfaces and the seal rings lightly with oil.

LX1029899

1. Install guide (A) on the piston rod.

LX24603,00002FC –19–01JUN03–8/13

–UN–03JUL03

2. With the two flat surfaces (A) that allow the rod to be gripped with a wrench going in first, insert the piston rod into the cylinder sleeve.

LX1031384

05 10

Continued on next page

CTM4820 (01JUL03)

05-10

LX24603,00002FC –19–01JUN03–9/13

Front-Wheel Drive Axles 082903

PN=36

Steering Cylinder and Tie-Rods 05 11

3. Push the guide of the piston rod in so that the inner snap ring can be installed.

LX1029900

–UN–07AUG02

4. Insert inner snap ring (A) into groove in cylinder sleeve.

LX24603,00002FC –19–01JUN03–10/13

LX1029901

–UN–24OCT02

5. Pull piston rod (C) until guide (A) contacts snap ring (B).

LX24603,00002FC –19–01JUN03–11/13

LX1029085

–UN–06AUG02

6. Install snap ring (A).

Continued on next page

CTM4820 (01JUL03)

05-11

LX24603,00002FC –19–01JUN03–12/13

Front-Wheel Drive Axles 082903

PN=37

Steering Cylinder and Tie-Rods 7. Install flange (B). a. Install snap ring (C).

–UN–06AUG02

b. Apply special grease MOLYKOTE G (L81050) to the contact surfaces of flange and cylinder sleeve.

LX1029084

c. Position flange (B) and secure it with spring pin (A).

8. Install steering cylinder, see reference “Install the Steering Cylinder” in this Group.

LX24603,00002FC –19–01JUN03–13/13

Install the Steering Cylinder

–UN–06AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

NOTE: 730, 733 and 740 axles have the axle housing and steering cylinder transposed (mirror-image).

LX1029083

05 12

1. Apply special grease MOLYKOTE G (L81050) to the contact surfaces of steering cylinder and axle housing.

2. Insert steering cylinder into axle housing.

Continued on next page

CTM4820 (01JUL03)

05-12

LX24603,00002FE –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=38

Steering Cylinder and Tie-Rods 05 13

3. Coat cap screw threads with LOCTITE 2431 (L41475).

4. Install cap screws and tighten them evenly.

–UN–07AUG02

Specification Cap screws—Torque ......................................................... 129 to 143 N•m 95 to 105 lb-ft

LX1029904

5. Install tie-rods, see reference “Install the Tie-Rods” in this Group.

1

for North America: LOCTITE 242 (TY9370) LX24603,00002FE –19–01JUN03–2/2

Install the Tie-Rods

–UN–07AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1029905

1. Coat approx. 3 turns of the thread on the tie-rod (see arrow) with L41475 thread lock (LOCTITE 2431).

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,00002FF –19–01JUN03–1/3

2. Install tie-rods on piston rod.

LX1029081

–UN–06AUG02

Specification 730—Torque ...................................................................... 240 to 270 N•m 177 to 199 lb-ft 733, 740, 745, 750—Torque ............................................. 360 to 400 N•m 265 to 295 lb-ft

Continued on next page

CTM4820 (01JUL03)

05-13

LX24603,00002FF –19–01JUN03–2/3

Front-Wheel Drive Axles 082903

PN=39

Steering Cylinder and Tie-Rods

Specification 730, 733—Torque ............................................................. 200 to 220 N•m 148 to 162 lb-ft 740, 745, 750—Torque ..................................................... 350 to 390 N•m 258 to 287 lb-ft

4. For basic adjustment of tread, see reference “Check and Adjust Tread (Basic Adjustment)” in this Group.

–UN–07AUG02

3. Using a new self-locking nut, install tie-rod to knuckle housing.

LX1029907

05 14

LX24603,00002FF –19–01JUN03–3/3

CTM4820 (01JUL03)

05-14

Front-Wheel Drive Axles 082903

PN=40

Steering Cylinder and Tie-Rods 05 15

CTM4820 (01JUL03)

05-15

Front-Wheel Drive Axles 082903

PN=41

Steering Cylinder and Tie-Rods

–UN–24OCT02

Check and Adjust Tread (Basic Adjustment)

LX1029908

05 16

For example:

Check tread basic adjustment 1. Move steering cylinder piston rod to center position.

Dimension (a), measured ............................... 273 mm (10.748 in.)

Dimension (b), measured ..................................... 3 mm (0.118 in.)

Center position, determine dimension (x):

Formula: x = (a - b) : 2

a. Remove adjusting screws for left and right steering angle.

x = (273 mm - 3 mm) : 2 = 135 mm (x = (10.748 in. - 0.118 in.) : 2 = 5.315 in.)

b. Determining dimension (a): Move piston rod to r.h. stop of steering cylinder. Measure distance between steering cylinder face (B) and axial joint face (C). c. Determining dimension (b): Move piston rod to l.h. stop of steering cylinder. Measure distance between steering cylinder face (B) and axial joint face (C). d. Determine dimension (x).

e. Move piston rod until the determined distance (x) is obtained. The piston rod of steering cylinder is now in center position. f. Install adjusting screws for left and right steering angle.

2. Check if distances A1 to A4 are equal. Re-adjust if necessary.

Continued on next page

CTM4820 (01JUL03)

05-16

LX24603,0000300 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=42

Steering Cylinder and Tie-Rods 05 17

Basic adjustment of tread

2. Turn threaded rod (B) of pivot on left and right tie-rod in or out until distances A1 to A4 are equal.

3. Tighten locknut (A).

LX1032226

1. Loosen locknut (A) on left and right tie-rod.

–UN–03JUL03

IMPORTANT: When adjusting make sure that piston rod remains in previously adjusted center position.

Specification 730—Torque ...................................................................... 220 to 240 N•m 162 to 177 lb-ft 733, 740, 745, 750—Torque ............................................. 328 to 363 N•m 242 to 267 lb-ft

4. Check tread basic adjustment again.

5. Adjust toe-in, see reference “Check and Adjust Toe-In” in this Group.

LX24603,0000300 –19–01JUN03–2/2

CTM4820 (01JUL03)

05-17

Front-Wheel Drive Axles 082903

PN=43

Steering Cylinder and Tie-Rods

Check and Adjust Toe-In

–UN–02JAN95

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

Checking toe-in At front axle height, measure the distance both front and rear from wheel rim to wheel rim.

LX009841

05 18

1. Measure dimension (A).

2. Turn the front wheels through half a turn.

3. Measure dimension (B) at the same point where dimension (A) was measured.

Dimension (A) must not differ from dimension (B) by more than 1.5 mm (0.06 in.).

Specification Front-wheel drive axle—Toe-in ...................................................... 1.5 mm 0.06 in.

Continued on next page

CTM4820 (01JUL03)

05-18

LX24603,0000302 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=44

Steering Cylinder and Tie-Rods 05 19

Adjusting toe-in

Specification Front-wheel drive axle—Toe-in ...................................................... 1.5 mm 0.06 in.

2. Tighten locknut (A).

LX1032226

1. Loosen locknut (A) and screw threaded rod (B) of pivot in or out.

–UN–03JUL03

NOTE: Adjust toe-in equally at both tie-rods.

Specification 730—Torque ...................................................................... 220 to 240 N•m 162 to 177 lb-ft 733, 740, 745, 750—Torque ............................................. 328 to 363 N•m 242 to 267 lb-ft

3. Check toe-in adjustment again.

4. Adjust steering angle, see reference “Check and Adjust Steering Angle” in this Group.

LX24603,0000302 –19–01JUN03–2/2

CTM4820 (01JUL03)

05-19

Front-Wheel Drive Axles 082903

PN=45

Steering Cylinder and Tie-Rods

Check and Adjust Steering Angle

–UN–04FEB98

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

NOTE: Steering angle must be the same on both sides.

LX1019515

NOTE: Steering angle adjustment depends on how the tractor is equipped (tire size, front fenders and implements). Dimension (C) can be found in the relevant Operator’s Manual.

1. Measure dimension (C).

–UN–23JUL03

2. If necessary, adjust steering angle by means of screw (A).

3. Determine dimension (x). If dimension (x) is 90 mm (3.5 in.) or more, bushing1 (D) must be installed.

4. After making adjustments, tighten locknut (B).

LX1031385

05 20

Specification Locknut—Torque .......................................................................... 120 N•m 89 lb-ft A—Adjusting screw B—Locknut C—Dimension D—Bushing1

1

Available as spare part LX24603,0000301 –19–01JUN03–1/1

CTM4820 (01JUL03)

05-20

Front-Wheel Drive Axles 082903

PN=46

Group 10

Planetary Drive and Wheel Hub Special or Essential Tools

10 1

NOTE: Order tools according to information given in the U.S. SERVICEGARD Catalog or European Microfiche Tool Catalog (MTC).

SERVICEGARD is a trademark of Deere & Company

LX24603,0000336 –19–01JUN03–1/3 KJD10279 –UN–04AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10279 Installing wheel hub seal

LX24603,0000336 –19–01JUN03–2/3 LX001364 –UN–16MAR95

Hydraulic hand-operated pump . . . . . . . . . . D01019AA Checking multi-disk brake system for leaks

LX24603,0000336 –19–01JUN03–3/3

Other Material Number

Name

Use

L414751 (U.S.) 243 (LOCTITE)

Thread lock

Screws, hollow ring gear to knuckle housing Special screws, brake piston to hollow ring gear flange

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,0000337 –19–01JUN03–1/1

CTM4820 (01JUL03)

10-1

Front-Wheel Drive Axles 082903

PN=47

Planetary Drive and Wheel Hub 10 2

Specifications Item

Measurement

Specification

Hollow ring gear to knuckle housing, screws

Torque

68 to 75 N•m 50 to 55 lb-ft

Planetary carrier to wheel hub, screws

Torque

40 to 50 N•m 30 to 36 lb-ft

Brake piston to hollow ring gear, special screws

Torque

10 to 15 N•m 7.5 to 11 lb-ft

Planetary carrier, screw plug

Torque

90 N•m 66 lb-ft

Brake

Test pressure

5000 kPa 50 bar 725 psi

Brake

Drop in pressure

0.0 kPa over 3 minutes 0.0 bar over 3 minutes 0.0 psi over 3 minutes

Leak-test for disk brake

LX24603,0000338 –19–01JUN03–1/1

CTM4820 (01JUL03)

10-2

Front-Wheel Drive Axles 082903

PN=48

Planetary Drive and Wheel Hub 10 3

CTM4820 (01JUL03)

10-3

Front-Wheel Drive Axles 082903

PN=49

Planetary Drive and Wheel Hub

–UN–30JUL03

Planetary Drive and Wheel Hub - Sectional View (Without Multi-Disk Brake)

LX1032227

10 4

Sectional view (733) A—Knuckle housing B—Wheel hub

C—Snap ring D—Flange E—Hollow ring gear F—Needle bearing

G—Planetary gear (31 or 42 used) H—Planetary carrier

I—Seal ring J—Tapered roller bearing K—Drive shaft

1

On 730

2

On 733 Continued on next page

CTM4820 (01JUL03)

10-4

LX24603,0000306 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=50

Planetary Drive and Wheel Hub

LX1031386

–UN–30JUL03

10 5

Sectional view (750 without multi-disk brake) A—Knuckle housing B—Wheel hub C—Snap ring

D—Flange E—Hollow ring gear F—Tapered roller bearing G—Planetary gear (31 or 42 used)

H—Tapered roller bearing I—Planetary carrier J—Seal ring

K—Tapered roller bearing L—Drive shaft

1

On 740 and 745

2

On 750 LX24603,0000306 –19–01JUN03–2/2

CTM4820 (01JUL03)

10-5

Front-Wheel Drive Axles 082903

PN=51

Planetary Drive and Wheel Hub

–UN–30JUL03

Planetary Drive, Multi-Disk Brake and Wheel Hub - Sectional View

LX1032228

10 6

Sectional view (733 with multi-disk brake) A—Knuckle housing B—Wheel hub C—Snap ring D—Flange E—Hollow ring gear

F—Needle bearing G—Planet gear (4 used) H—Planetary carrier I—Seal ring

J—Tapered roller bearing K—Drive shaft L—Brake piston M—Externally splined disk (3 used)

Continued on next page

CTM4820 (01JUL03)

10-6

N—Internally splined disk (2 used) O—Snap ring

LX24603,0000307 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=52

Planetary Drive and Wheel Hub

LX1031387

–UN–30JUL03

10 7

Sectional view (750 with multi-disk brake) A—Knuckle housing B—Wheel hub C—Snap ring D—Flange E—Hollow ring gear

F—Tapered roller bearing G—Planetary gear (31 or 42 used) H—Tapered roller bearing I—Planetary carrier

J—Seal ring K—Tapered roller bearing L—Drive shaft M—Brake piston N—Externally splined disk

O—Internally splined disk (2 used) P—Externally splined disk (2 used) Q—Snap ring

1

On 740 and 745

2

On 750 LX24603,0000307 –19–01JUN03–2/2

CTM4820 (01JUL03)

10-7

Front-Wheel Drive Axles 082903

PN=53

Planetary Drive and Wheel Hub

–UN–30JUL03

Planetary Drive - Exploded View (Without Multi-Disk Brake)

LX1031388

10 8

A—Snap ring B—Flange

C—Hollow ring gear D—Snap ring E—Tapered roller bearing1, 2 F—Planetary gear (31 or 42 used)

G—Tapered roller bearing1, 2 H—Cap screw (12 used) I—Planetary carrier J—Fillister-head screw (2 used)

K—O-ring L—Screw plug M—Snap ring N—Planetary gear (33 or 44 used), with needle bearing

1

On 740 and 745

2

On 750

3

On 730

4

On 733

LX24603,0000308 –19–01JUN03–1/1

CTM4820 (01JUL03)

10-8

Front-Wheel Drive Axles 082903

PN=54

Planetary Drive and Wheel Hub

Planetary Drive Removal (Without Multi-Disk Brake)

10 9

–UN–09AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1029913

Removing the planetary carrier 1. Remove screw plug and drain oil.

LX24603,0000309 –19–01JUN03–1/5

LX1029914

–UN–09AUG02

2. Take out screws (A).

LX24603,0000309 –19–01JUN03–2/5

NOTE: Using a screwdriver at the grooves provided, pry planetary carrier off the wheel hub.

LX1029915

–UN–09AUG02

3. Remove planetary carrier (A).

LX24603,0000309 –19–01JUN03–3/5

Removing the hollow ring gear

–UN–09AUG02

NOTE: Cap screws are installed with L41475 thread lock (LOCTITE 243).

LX1029916

1. Take out cap screws.

LOCTITE is a registered trademark of the Loctite Corporation

CTM4820 (01JUL03)

Continued on next page

10-9

LX24603,0000309 –19–01JUN03–4/5

Front-Wheel Drive Axles 082903

PN=55

Planetary Drive and Wheel Hub 2. Remove hollow ring gear by using two M8 x 100 mm screws.

LX1031395

–UN–03JUL03

3. Recondition the planetary drive, see reference “Planetary Drive Reconditioning (Without Multi-Disk Brake)” in this Group.

LX24603,0000309 –19–01JUN03–5/5

Planetary Drive Reconditioning (Without Multi-Disk Brake)

–UN–03JUL03

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1031389

NOTE: Remove planetary carrier, see reference “Planetary Drive Removal (Without Multi-Disk Brake)” in this Group.

Reconditioning the planetary gears (730 and 733)

NOTE: Mark position of planetary gears so they can be re-installed properly.

1. Remove the snap ring.

LX24603,000030A –19–01JUN03–1/11

2. Pull off planetary gear together with its needle bearing.

–UN–03JUL03

NOTE: The needle bearing is secured to the planetary gear by a snap ring and cannot be taken off on its own. If either the planetary gear or needle bearing need to be replaced, they must be replaced together as a matching set.

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX1031390

10 10

Continued on next page

CTM4820 (01JUL03)

10-10

LX24603,000030A –19–01JUN03–2/11

Front-Wheel Drive Axles 082903

PN=56

Planetary Drive and Wheel Hub 10 11

NOTE: When installing, pay attention to the marks made prior to removal.

LX1031391

–UN–03JUL03

4. Install the planetary gear and needle bearing with the rounded edge (see arrow) facing downward.

LX24603,000030A –19–01JUN03–3/11

LX1031389

–UN–03JUL03

5. Install snap ring and check that it is seated correctly.

LX24603,000030A –19–01JUN03–4/11

Reconditioning the planetary gears (740, 745 and 750)

–UN–09AUG02

NOTE: Mark position of planetary gears and tapered roller bearings so they can be re-installed properly.

LX1029918

1. Remove the snap ring.

Continued on next page

CTM4820 (01JUL03)

10-11

LX24603,000030A –19–01JUN03–5/11

Front-Wheel Drive Axles 082903

PN=57

Planetary Drive and Wheel Hub

–UN–09AUG02

NOTE: Place the extraction tool only on the face of the planetary gear. If the extraction tool is placed too low, damage to the cage of the bottom tapered roller bearing will occur!

2. Pull off planetary gear.

LX1029919

3. Remove bottom tapered roller bearing.

4. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000030A –19–01JUN03–6/11

NOTE: When installing, pay attention to the marks made prior to removal.

–UN–20AUG02

5. Install tapered roller bearing (A) with rounded edge (see arrow) facing downward.

LX1030119

6. Install planetary gear (B) with the writing facing upward.

7. Install top tapered roller bearing (C).

LX24603,000030A –19–01JUN03–7/11

–UN–09AUG02

8. Install snap ring and check that it is seated correctly.

LX1030120

10 12

Continued on next page

CTM4820 (01JUL03)

10-12

LX24603,000030A –19–01JUN03–8/11

Front-Wheel Drive Axles 082903

PN=58

Planetary Drive and Wheel Hub 10 13

Reconditioning the hollow ring gear 1. Remove snap ring (A).

–UN–09AUG02

2. Remove flange (B) from hollow ring gear.

LX1030121

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000030A –19–01JUN03–9/11

LX1030122

–UN–09AUG02

4. Position flange (A) in hollow ring gear.

LX24603,000030A –19–01JUN03–10/11

5. Install snap ring (A).

LX1029087

–UN–12AUG02

6. Install planetary drive, see reference “Planetary Drive Installation (Without Multi-Disk Brake)” in this Group.

LX24603,000030A –19–01JUN03–11/11

CTM4820 (01JUL03)

10-13

Front-Wheel Drive Axles 082903

PN=59

Planetary Drive and Wheel Hub

Planetary Drive Installation (Without Multi-Disk Brake)

–UN–12AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030123

Installing the hollow ring gear

NOTE: Thoroughly remove old thread lock from holes and screws.

1. Install hollow ring gear.

LX24603,000030B –19–01JUN03–1/5

2. Apply LOCTITE 243 (L41475) to the threads.

–UN–12AUG02

3. Install cap screws, tighten them cross-wise and while doing so turn the hub several times in both directions.

LX1030124

Specification Cap screws—Torque ............................................................. 68 to 75 N•m 50 to 55 lb-ft

LOCTITE is a registered trademark of the Loctite Corporation

LX24603,000030B –19–01JUN03–2/5

Installing the planetary carrier

–UN–12AUG02

1. Apply oil to O-ring (A) and insert it into groove (B).

LX1030126

10 14

Continued on next page

CTM4820 (01JUL03)

10-14

LX24603,000030B –19–01JUN03–3/5

Front-Wheel Drive Axles 082903

PN=60

Planetary Drive and Wheel Hub 10 15

2. Install planetary carrier.

LX1030127

Specification Screws—Torque .................................................................... 40 to 50 N•m 30 to 36 lb-ft

–UN–12AUG02

3. Install screws (A).

LX24603,000030B –19–01JUN03–4/5

NOTE: To fill in oil, see reference “Planetary Drive - Fill with Oil” in this Group.

LX1030128

Specification Screw plug—Torque ....................................................................... 90 N•m 66 lb-ft

–UN–12AUG02

4. Install screw plug with new O-ring.

LX24603,000030B –19–01JUN03–5/5

CTM4820 (01JUL03)

10-15

Front-Wheel Drive Axles 082903

PN=61

Planetary Drive and Wheel Hub

–UN–30JUL03

Planetary Drive and Multi-Disk Brake—Exploded View

LX1031392

10 16

Continued on next page

CTM4820 (01JUL03)

10-16

LX24603,000030C –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=62

Planetary Drive and Wheel Hub A—Vent screw, multi-disk brake

B—O-ring C—Snap ring D—Flange E—Hollow ring gear F—Back-up ring G—O-ring H—Piston I—Spring (3 used) J—Special screw (3 used)

K—Back-up ring L—O-ring M—Cap screws (12 used) N—Externally splined disk O—Internally splined disk P—Externally splined disk Q—Snap ring R—Snap ring

10 17

S—Tapered roller bearing1, 2 T—Planetary gear (31 or 42 used) U—Tapered roller bearing1, 2 V—Planetary carrier W—Snap ring X—Planetary gear3 (4 used), with needle bearing

1

On 740 and 745

2

On 750

3

On 733

LX24603,000030C –19–01JUN03–2/2

Planetary Drive and Multi-Disk Brake Removal

–UN–09AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1029913

Removing the planetary carrier 1. Remove screw plug and drain oil.

LX24603,000030D –19–01JUN03–1/10

LX1029914

–UN–09AUG02

2. Take out screws (A).

Continued on next page

CTM4820 (01JUL03)

10-17

LX24603,000030D –19–01JUN03–2/10

Front-Wheel Drive Axles 082903

PN=63

Planetary Drive and Wheel Hub NOTE: Using a screwdriver at the grooves provided, pry planetary carrier off the wheel hub.

LX1029915

–UN–09AUG02

3. Remove planetary carrier (A).

LX24603,000030D –19–01JUN03–3/10

Removing the multi-disk brake

LX1030133

–UN–12AUG02

1. Remove the snap ring.

LX24603,000030D –19–01JUN03–4/10

NOTE: Pay attention to the sequence and position of the disks.

LX1030134

–UN–12AUG02

2. Remove disk pack.

LX24603,000030D –19–01JUN03–5/10

–UN–12AUG02

3. Remove the three special screws (A) and the springs of the brake piston.

LX1030135

10 18

Continued on next page

CTM4820 (01JUL03)

10-18

LX24603,000030D –19–01JUN03–6/10

Front-Wheel Drive Axles 082903

PN=64

Planetary Drive and Wheel Hub 10 19

LX1030136

–UN–12AUG02

4. Carefully push out the brake piston by applying compressed to the brake oil channel. Secure the brake piston to keep it from dropping and getting damaged.

LX24603,000030D –19–01JUN03–7/10

5. Remove brake piston.

LX1030137

NOTE: Install multi-disk brake, see reference “Planetary Drive and Multi-Disk Brake Installation” in this Group.

–UN–12AUG02

6. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000030D –19–01JUN03–8/10

Removing the hollow ring gear

–UN–09AUG02

NOTE: Cap screws are installed with L41475 thread lock (LOCTITE 243).

LX1029916

1. Take out cap screws.

LOCTITE is a registered trademark of the Loctite Corporation

LX24603,000030D –19–01JUN03–9/10

2. Remove hollow ring gear by using two M8 x 100 mm screws.

LX1031395

3. Recondition the planetary drive, see reference “Planetary Drive Reconditioning (With Multi-Disk Brake)” in this Group.

–UN–03JUL03

NOTE: Pay attention to the O-ring of the brake oil channel between the hollow ring gear and the knuckle housing.

LX24603,000030D –19–01JUN03–10/10

CTM4820 (01JUL03)

10-19

Front-Wheel Drive Axles 082903

PN=65

Planetary Drive and Wheel Hub

Planetary Drive Reconditioning (With Multi-Disk Brake)

–UN–03JUL03

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1031389

NOTE: Remove planetary carrier and hollow ring gear, see reference “Planetary Drive and Multi-Disk Brake Removal” in this Group.

Reconditioning the planetary gears (733)

NOTE: Mark position of planetary gears and needle bearings so they can be re-installed properly.

1. Remove the snap ring.

LX24603,000030E –19–01JUN03–1/9

2. Pull off planetary gear together with its needle bearing.

–UN–03JUL03

NOTE: The needle bearing is secured to the planetary gear by a snap ring and cannot be taken off on its own. If either the planetary gear or needle bearing need to be replaced, they must be replaced together as a matching set.

LX1031390

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000030E –19–01JUN03–2/9

NOTE: When installing, pay attention to the marks made prior to removal.

–UN–03JUL03

4. Install the planetary gear and needle bearing with the rounded edge (see arrow) facing downward.

LX1031391

10 20

Continued on next page

CTM4820 (01JUL03)

10-20

LX24603,000030E –19–01JUN03–3/9

Front-Wheel Drive Axles 082903

PN=66

Planetary Drive and Wheel Hub 10 21

LX1031389

–UN–03JUL03

5. Install snap ring and check that it is seated correctly.

LX24603,000030E –19–01JUN03–4/9

Reconditioning the planetary gears (740, 745 and 750)

–UN–09AUG02

NOTE: Mark position of planetary gears and tapered roller bearings so they can be re-installed properly.

LX1029918

1. Remove snap rings.

LX24603,000030E –19–01JUN03–5/9

–UN–09AUG02

NOTE: Place the extraction tool only on the face of the planetary gear. If the extraction tool is placed too low, damage to the cage of the bottom tapered roller bearing will occur!

2. Pull off planetary gear.

LX1029919

3. Remove bottom tapered roller bearing.

4. Clean the various parts, inspect them for wear or damage and replace as necessary.

Continued on next page

CTM4820 (01JUL03)

10-21

LX24603,000030E –19–01JUN03–6/9

Front-Wheel Drive Axles 082903

PN=67

Planetary Drive and Wheel Hub NOTE: When installing, pay attention to the marks made prior to removal.

–UN–20AUG02

5. Install tapered roller bearing (A) with rounded edge (see arrow) facing downward.

LX1030119

6. Install planetary gear (B) with the writing facing upward.

7. Install top tapered roller bearing (C).

LX24603,000030E –19–01JUN03–7/9

LX1030120

–UN–09AUG02

8. Install snap ring and check that it is seated correctly.

LX24603,000030E –19–01JUN03–8/9

Reconditioning the hollow ring gear 1. Remove snap ring (A).

–UN–12AUG02

2. Remove flange (B) from hollow ring gear.

IMPORTANT: Thoroughly examine the sliding and sealing surfaces of the brake piston inside the flange.

LX1030130

10 22

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

4. Position flange (B) in hollow ring gear.

5. Install snap ring (A).

6. Install planetary drive, see reference “Planetary Drive and Multi-Disk Brake Installation” in this Group.

LX24603,000030E –19–01JUN03–9/9

CTM4820 (01JUL03)

10-22

Front-Wheel Drive Axles 082903

PN=68

Planetary Drive and Wheel Hub

Planetary Drive and Multi-Disk Brake Installation

10 23

–UN–28OCT02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030138

Installing the hollow ring gear 1. Coat a new O-ring (A) with a little grease, and install.

LX24603,000030F –19–01JUN03–1/11

–UN–12AUG02

IMPORTANT: Make sure parts are correctly installed.

The brake oil channels on the knuckle housing and on the flange of the hollow ring gear must be aligned.

NOTE: Thoroughly remove old thread lock from holes and screws.

LX1030123

2. Install hollow ring gear. Make sure that the O-ring is installed correctly.

LX24603,000030F –19–01JUN03–2/11

3. Apply LOCTITE 243 (L41475) to the threads.

–UN–12AUG02

4. Install the screws, tighten them cross-wise and while doing so turn the hub several times in both directions.

LX1030124

Specification Screws—Torque .................................................................... 68 to 75 N•m 50 to 55 lb-ft

LOCTITE is a registered trademark of the Loctite Corporation

CTM4820 (01JUL03)

Continued on next page

10-23

LX24603,000030F –19–01JUN03–3/11

Front-Wheel Drive Axles 082903

PN=69

Planetary Drive and Wheel Hub Installing the multi-disk brake 1. Install new O-rings and back-up rings on brake piston: –UN–12AUG02

a. Apply a thin coat of oil to O-rings (A and B) and install them.

LX1030139

b. Apply a thin coat of oil to back-up rings (C and D) and install them so that the rounded (concave) side faces the O-rings (see drawing).

LX1030140

–UN–24OCT02

A—O-ring B—O-ring C—Back-up ring D—Back-up ring E—Brake piston

LX24603,000030F –19–01JUN03–4/11

2. Position brake piston so that the holes the in flange of hollow ring gear and the piston are aligned, then insert the brake piston.

–UN–12AUG02

3. Using a plastic hammer, drive the brake piston in carefully and evenly.

LX1030141

10 24

Continued on next page

CTM4820 (01JUL03)

10-24

LX24603,000030F –19–01JUN03–5/11

Front-Wheel Drive Axles 082903

PN=70

Planetary Drive and Wheel Hub 10 25

4. Place springs (A) on special screws (B).

–UN–12AUG02

NOTE: Apply a thin coat of thread lock to the special screws only, otherwise excess thread lock may be forced into the piston chamber.

LX1030142

5. Coat special screw threads with LOCTITE 2431 (L41475).

6. Install special screws and tighten them evenly.

Specification Special screws—Torque........................................................ 10 to 15 N•m 7.5 to 11 lb-ft

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) Continued on next page

CTM4820 (01JUL03)

10-25

LX24603,000030F –19–01JUN03–6/11

Front-Wheel Drive Axles 082903

PN=71

Planetary Drive and Wheel Hub

–UN–12AUG02

NOTE: Position the externally splined disks so that the gaps (A; if equipped) in the teeth are aligned with the holes (B) on the outer circumference of the hollow ring gear.

Position the internally splined disks so that the teardrop holes (C; if present) are aligned.

LX1030143

7. Apply a thin coat of oil to the brake disks and install them. a. On 733: Start installing disks with an externally splined one. Then alternately install one internally and one externally splined disk (see illustration).

–UN–30JUL03

b. On 740, 745 and 750: Start installing disks with the thin, externally splined disk. Then alternately install one internally and one externally splined disk (see illustration).

LX1033136

A—Gap B—Hole C—Teardrop hole D—Thin, externally splined disk E—Internally splined disk F—Externally splined disk G—Snap ring

LX1030240

–UN–24OCT02

Disk arrangement on 733

Disk arrangement on 740, 745 and 750

LX24603,000030F –19–01JUN03–7/11

8. Install snap ring (A).

–UN–13AUG02

9. Check for leaks at the brake, see reference “Check Multi-Disk Brake for Leaks” in this Group.

LX1030144

10 26

Continued on next page

CTM4820 (01JUL03)

10-26

LX24603,000030F –19–01JUN03–8/11

Front-Wheel Drive Axles 082903

PN=72

Planetary Drive and Wheel Hub 10 27

Installing the planetary carrier 1. Apply oil to O-ring (A) and insert it into groove.

LX1030131

–UN–13AUG02

2. Position planetary carrier (B).

LX24603,000030F –19–01JUN03–9/11

3. Install screws (A).

LX1030127

–UN–12AUG02

Specification Screws—Torque .................................................................... 40 to 50 N•m 30 to 36 lb-ft

LX24603,000030F –19–01JUN03–10/11

NOTE: To fill in oil, see reference “Planetary Drive - Fill with Oil” in this Group.

LX1030128

Specification Screw plug—Torque ....................................................................... 90 N•m 66 lb-ft

–UN–12AUG02

4. Install screw plug with new O-ring.

LX24603,000030F –19–01JUN03–11/11

CTM4820 (01JUL03)

10-27

Front-Wheel Drive Axles 082903

PN=73

Planetary Drive and Wheel Hub

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

NOTE: Fill hand pump with clean transmission/hydraulic oil.

–UN–13AUG02

Check Multi-Disk Brake for Leaks

LX1030145

10 28

1. Connect hand pump.

2. Bleed brake hydraulic system and operate for at least ten times.

3. Check for leaks: Build up test pressure, then close shut-off valve between hand pump and pressure gauge.

Specification Brake—Test pressure.................................................................. 5000 kPa 50 bar 725 psi Brake—Drop in pressure ....................................... 0.0 kPa over 3 minutes 0.0 bar over 3 minutes 0.0 psi over 3 minutes

LX24603,0000233 –19–01JUN03–1/1

CTM4820 (01JUL03)

10-28

Front-Wheel Drive Axles 082903

PN=74

Planetary Drive and Wheel Hub

Planetary Drive - Fill With Oil

IMPORTANT: Exclusively use oil types specified in the relevant tractor Technical Manual.

Refer to "Front Wheel Drive Axle Oil" and "Capacities" in Technical Manual "Repair", Section 10, Group 05.

LX1030159

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

–UN–13AUG02

10 29

1. Axle must be in horizontal position.

2. Plug (A) must be in the position shown.

3. Fill with oil until the level comes up to the lower edge of plug bore (A).

4. Install screw plug with new O-ring.

Specification Screw plug—Torque ....................................................................... 90 N•m 66 lb-ft

LX24603,0000310 –19–01JUL02–1/1

CTM4820 (01JUL03)

10-29

Front-Wheel Drive Axles 082903

PN=75

Planetary Drive and Wheel Hub

–UN–24OCT02

Wheel Hub - Exploded View

LX1030146

10 30

A—Seal ring

B—Tapered roller bearing cone

C—Tapered roller bearing cup D—Wheel hub

E—O-ring F—Wheel bolt (81 or 102 used)

1

On 730 and 733

2

On 740, 745 and 750 LX24603,0000311 –19–01JUN03–1/1

CTM4820 (01JUL03)

10-30

Front-Wheel Drive Axles 082903

PN=76

Planetary Drive and Wheel Hub

Remove Wheel Hub

10 31

–UN–13AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030147

NOTE: Remove planetary drive, see reference “Planetary Drive Removal (Without Multi-Disk Brake)” or “Planetary Drive and Multi-Disk Brake Removal” in this Group.

1. Using a plastic hammer, evenly drive out the wheel hub only until the tapered roller bearing cone (A) is released.

LX24603,0000312 –19–01JUN03–1/4

LX1030148

–UN–13AUG02

2. Remove tapered roller bearing cone.

LX24603,0000312 –19–01JUN03–2/4

LX1030149

–UN–13AUG02

3. Remove wheel hub.

Continued on next page

CTM4820 (01JUL03)

10-31

LX24603,0000312 –19–01JUN03–3/4

Front-Wheel Drive Axles 082903

PN=77

Planetary Drive and Wheel Hub 4. On 730 and 733: Remove tapered roller bearing cone.

LX1032217

–UN–03JUL03

5. Recondition the wheel hub, see reference “Recondition the Wheel Hub” in this Group.

LX24603,0000312 –19–01JUN03–4/4

Recondition the Wheel Hub

–UN–13AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030150

NOTE: Remove wheel hub, see reference “Remove Wheel Hub” in this Group.

1. Remove seal ring.

LX24603,0000313 –19–01JUN03–1/7

LX1030151

–UN–13AUG02

2. On 740, 745 and 750: Remove tapered roller bearing cone.

LX24603,0000313 –19–01JUN03–2/7

3. Remove tapered roller bearing cups.

–UN–13AUG02

4. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX1030152

10 32

Continued on next page

CTM4820 (01JUL03)

10-32

LX24603,0000313 –19–01JUN03–3/7

Front-Wheel Drive Axles 082903

PN=78

Planetary Drive and Wheel Hub 10 33

LX1030153

–UN–13AUG02

5. Carefully and evenly drive the tapered roller bearing cups (A and B) in as far as they will go.

LX24603,0000313 –19–01JUN03–4/7

LX1032218

–UN–03JUL03

6. On 730 and 733: Drive in tapered rolled bearing cone (A) as far as it will go.

LX24603,0000313 –19–01JUN03–5/7

NOTE: Make sure parts are correctly installed.

LX1030151

–UN–13AUG02

7. On 740, 745 and 750: Install the tapered roller bearing cone.

Continued on next page

CTM4820 (01JUL03)

10-33

LX24603,0000313 –19–01JUN03–6/7

Front-Wheel Drive Axles 082903

PN=79

Planetary Drive and Wheel Hub 8. Apply a thin coat of oil to the outside of the seal ring and place it on special tool KJD10279 (A) with the open side facing away from the tool.

–UN–13AUG02

9. Use the special tool to install the seal ring.

LX1030157

a. On 730 and 733: Evenly drive the seal ring in as far as it will go. The seal ring is seated properly when there is an all-round gap of approx. 6 mm (0.236 in.) between the special tool and the hub (see drawing A). b. On 740, 745 and 750: Drive the seal ring in until the special tool is touching the hub; there should be no gap between the tool and the hub (see drawing B).

LX1033154

–UN–29JUL03

10. Install wheel hub, see reference “Installing the Wheel Hub” in this Group.

LX24603,0000313 –19–01JUN03–7/7

Installing the Wheel Hub

–UN–13AUG02

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

NOTE: Before installing the wheel hub, apply a thin coat of oil (not grease) to the lips of the seal and the sealing surfaces of the knuckle housing.

LX1030149

10 34

1. Install wheel hub.

Continued on next page

CTM4820 (01JUL03)

10-34

LX24603,0000314 –19–01JUL02–1/2

Front-Wheel Drive Axles 082903

PN=80

Planetary Drive and Wheel Hub 10 35

2. Install the tapered roller bearing cone.

LX1030148

–UN–13AUG02

3. Install hollow ring gear, see "Planetary Drive Installation (Without Multi-Disk Brake)" or "Planetary Drive and Multi-Disk Brake Installation" in this Group.

LX24603,0000314 –19–01JUL02–2/2

CTM4820 (01JUL03)

10-35

Front-Wheel Drive Axles 082903

PN=81

Planetary Drive and Wheel Hub 10 36

CTM4820 (01JUL03)

10-36

Front-Wheel Drive Axles 082903

PN=82

Group 15

Knuckle Housing and Drive Shafts Special or Essential Tools

15 1

NOTE: Order tools according to information given in the U.S. SERVICEGARD Catalog or European Microfiche Tool Catalog (MTC).

SERVICEGARD is a trademark of Deere & Company

LX24603,000033A –19–01JUN03–1/11 KJD10421 –UN–05AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10421 Installing oil seal in knuckle housing (730, 733)

LX24603,000033A –19–01JUN03–2/11 KJD10282 –UN–29OCT02

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10282 Installing oil seal in knuckle housing (740, 745, 750)

LX24603,000033A –19–01JUN03–3/11 OTC27488 –UN–10FEB95

Handle . . . . . . . . . . . . . . . . . . . . . . . . . OTC274881 Install the tapered roller bearing cup in the knuckle pin bearing bores on the axle housing.

1

Part of tool kit D01045AA LX24603,000033A –19–01JUN03–4/11 OTC27523 –UN–10FEB95

Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . OTC275231 Install the tapered roller bearing cup in the knuckle pin bearing bores on the axle housing (730 and 733).

1

Part of tool kit D01045AA Continued on next page

CTM4820 (01JUL03)

15-1

LX24603,000033A –19–01JUN03–5/11

Front-Wheel Drive Axles 082903

PN=83

Knuckle Housing and Drive Shafts OTC27528 –UN–10FEB95

15 2

Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . OTC27528

1

Install the tapered roller bearing cup in the knuckle pin bearing bores on the axle housing (740, 745 and 750).

1

Part of tool kit D01045AA LX24603,000033A –19–01JUN03–6/11 KJD10422 –UN–05AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10422 Installing the seal ring on the king pin (730, 733).

LX24603,000033A –19–01JUN03–7/11 KJD10423 –UN–05AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10423 Installing the seal ring on the king pin (740, 745, 750).

LX24603,000033A –19–01JUN03–8/11 KJD10220 –UN–25MAR98

Bushing installer . . . . . . . . . . . . . . . . . . . . KJD10220 Installing bearing bushing of drive shaft in axle housing

LX24603,000033A –19–01JUN03–9/11 KJD10420 –UN–05AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10420 Installing seal ring of drive shaft in axle housing (730, 733).

LX24603,000033A –19–01JUN03–10/11 KJD10281 –UN–28OCT02

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10281 Installing seal ring of drive shaft in axle housing (740, 745, 750).

LX24603,000033A –19–01JUN03–11/11

CTM4820 (01JUL03)

15-2

Front-Wheel Drive Axles 082903

PN=84

Knuckle Housing and Drive Shafts

Other Material

15 3

Number

Name

Use

L81050 (U.S.) MOLYKOTE G (U.S.)

Special grease

Installing king pins

L414751 (U.S.) 243 (LOCTITE)

Thread lock

Cap screws, installing king pins

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,0000345 –19–01JUN03–1/1

CTM4820 (01JUL03)

15-3

Front-Wheel Drive Axles 082903

PN=85

Knuckle Housing and Drive Shafts 15 4

Specifications Item

Measurement

Specification

730, 733

Preload

0.5 to 0.6 mm 0.020 to 0.024 in.

740, 745, 750

Preload

0.7 to 0.8 mm 0.027 to 0.031 in.

730, 733

Torque

115 to 125 N•m 85 to 92 lb-ft

740, 745, 750

Torque

160 to 200 N•m 118 to 147 lb-ft

730, 733

Torque

200 to 220 N•m 148 to 162 lb-ft

740, 745, 750

Torque

350 to 390 N•m 258 to 287 lb-ft

Knuckle pin bearing

King pin to knuckle housing, cap screws

Tie-rod to knuckle housing, self-locking nut

LX24603,000033C –19–01JUN03–1/1

CTM4820 (01JUL03)

15-4

Front-Wheel Drive Axles 082903

PN=86

Knuckle Housing and Drive Shafts

Knuckle Housing and Drive Shaft - Sectional View

LX1032219

–UN–05AUG03

15 5

Knuckle housing, sectional view (750) A—Axle housing B—Shims (thickness as required) C—Threaded plug D—King pin

E—Knuckle housing F—Seal ring G—Bushing H—Tapered roller bearing I—Thrust washer

J—Snap ring K—Drive shaft L—Ball bearing M—Snap ring

Continued on next page

CTM4820 (01JUL03)

15-5

N—Seal ring O—King pin P—Seal ring Q—Bushing

LX24603,0000317 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=87

Knuckle Housing and Drive Shafts

LX1033155

–UN–14AUG03

15 6

Knuckle housing, sectional view (750 with AutoTrac) A—Axle housing B—Shims (thickness as required) C—Steering angle sensor1

D—King pin1 E—Knuckle housing F—Seal ring G—Bushing H—Tapered roller bearing

I—Thrust washer J—Snap ring K—Drive shaft L—Ball bearing M—Snap ring

N—Seal ring O—King pin P—Seal ring Q—Bushing

1

With AutoTrac LX24603,0000317 –19–01JUN03–2/2

CTM4820 (01JUL03)

15-6

Front-Wheel Drive Axles 082903

PN=88

Knuckle Housing and Drive Shafts 15 7

CTM4820 (01JUL03)

15-7

Front-Wheel Drive Axles 082903

PN=89

Knuckle Housing and Drive Shafts

–UN–14AUG03

Knuckle Housing and Drive Shaft - Exploded View

LX1032220

15 8

Continued on next page

CTM4820 (01JUL03)

15-8

LX24603,0000318 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=90

Knuckle Housing and Drive Shafts 1—Tapered roller bearing cup 2—Bushing 3—Seal ring 4—R.h. end of drive shaft assembly 5—Seal ring

6—Snap ring 7—Ball bearing 8—King pin 9—Shims (thickness as required) 10—Seal ring 11—Tapered roller bearing cone 12—Knuckle housing

13—Thrust washer 14—Snap ring 15—Bushing1 16—Steering angle adjusting screw 17—Shaft 18—U-joint assembly 19—Snap ring (4 used) 20—Pivot

15 9

21—Shaft 22—Bushing 23—Adapter2 24—King pin2 25—Shaft2 26—Adapter2 27—O-ring 28—Steering angle sensor2

1

Only if dimension (x) is 90 mm (3.5 in.) or more.

2

With AutoTrac LX24603,0000318 –19–01JUN03–2/2

Remove Knuckle Housing

–UN–04FEB98

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1018418

NOTE: Remove wheel hub, see reference “Removing the Wheel Hub” in Group 10.

1. Remove screw plug and drain oil.

LX24603,0000319 –19–01JUN03–1/8

LX1029079

–UN–06AUG02

2. Remove self-locking nut.

Continued on next page

CTM4820 (01JUL03)

15-9

LX24603,0000319 –19–01JUN03–2/8

Front-Wheel Drive Axles 082903

PN=91

Knuckle Housing and Drive Shafts

LX1029080

–UN–06AUG02

3. Press tie-rod out of knuckle housing.

LX24603,0000319 –19–01JUN03–3/8

LX1032221

–UN–04JUL03

4. Take threaded plug (A; if equipped) and the cap screws out of the top of the king pin.

LX24603,0000319 –19–01JUN03–4/8

LX1032222

–UN–04JUL03

5. Take threaded plug (A; if equipped) and the cap screws out of the bottom of the king pin.

LX24603,0000319 –19–01JUN03–5/8

–UN–14AUG03

NOTE: If the king pin is equipped with a steering angle sensor, remove this sensor. See reference “Knuckle Housing — Remove and Install the Steering Angle Sensor” in this Group.

6. Remove top king pin (A) with shims (B), seal ring (C) and tapered roller bearing cone (D).

LX1033157

15 10

Continued on next page

CTM4820 (01JUL03)

15-10

LX24603,0000319 –19–01JUN03–6/8

Front-Wheel Drive Axles 082903

PN=92

Knuckle Housing and Drive Shafts 15 11

LX1033158

–UN–14AUG03

7. Remove bottom king pin (A) with seal ring (B) and tapered roller bearing cone (C).

LX24603,0000319 –19–01JUN03–7/8

NOTE: Carefully remove knuckle housing to avoid damaging shaft seal ring in axle housing.

–UN–15AUG02

8. Remove knuckle housing assembly with drive shaft.

LX1030168

9. Recondition knuckle housing and king pin, see reference “Recondition the Knuckle Housing and King Pin” in this Group.

LX24603,0000319 –19–01JUN03–8/8

Recondition the Knuckle Housing and King Pin

–UN–19AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030222

NOTE: Remove knuckle housing, see reference “Remove Knuckle Housing” in this Group.

NOTE: Remove drive shaft, see reference “Removing the Drive Shafts” in this Group.

Reconditioning the knuckle housing 1. Remove seal ring.

Continued on next page

CTM4820 (01JUL03)

15-11

LX24603,000031B –19–01JUN03–1/11

Front-Wheel Drive Axles 082903

PN=93

Knuckle Housing and Drive Shafts 2. Remove snap ring and ball bearing.

LX1030223

–UN–19AUG02

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000031B –19–01JUN03–2/11

LX1030224

–UN–19AUG02

4. Install the ball bearing.

LX24603,000031B –19–01JUN03–3/11

–UN–19AUG02

5. Install the snap ring.

LX1030223

15 12

Continued on next page

CTM4820 (01JUL03)

15-12

LX24603,000031B –19–01JUN03–4/11

Front-Wheel Drive Axles 082903

PN=94

Knuckle Housing and Drive Shafts 15 13

6. Place seal ring on special tool KJD104211 (A) or KJD102822 with the lip of the seal facing away from the tool.

–UN–19AUG02

7. Apply a thin coat of John Deere multi-purpose grease to the outer side of the seal ring.

LX1030225

8. Install seal ring using seal installer (A).

1

On 730 and 733

2

On 740, 745 and 750 LX24603,000031B –19–01JUN03–5/11

Reconditioning the king pin

LX1032229

–UN–14AUG03

1. Remove tapered roller bearing cone.

LX24603,000031B –19–01JUN03–6/11

LX1032230

–UN–14AUG03

2. Remove seal ring and shield (A).

Continued on next page

CTM4820 (01JUL03)

15-13

LX24603,000031B –19–01JUN03–7/11

Front-Wheel Drive Axles 082903

PN=95

Knuckle Housing and Drive Shafts 3. Remove taper roller bearing cups (A) from pin bearing bores of axle housing.

LX1030228

–UN–19AUG02

4. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000031B –19–01JUN03–8/11

–UN–04JUL03

5. Install tapered roller bearing cups in knuckle pin bearing bores using special tools OTC27488 (A; handle) and OTC275231 (B; disk) or OTC275282.

1

LX1032223

On 730 and 733

2

On 740, 745 and 750

LX24603,000031B –19–01JUN03–9/11

NOTE: If knuckle pin bearing components are ever replaced with new components, preload must be adjusted at the knuckle pin bearings. In this case, install the seal ring on the top of the king pin only after the adjustment has been made.

–UN–05AUG03

6. Using special tools KJD104221 (A) and KJD104232 (D), carefully press seal rings (B) and (E) together with the shield as far as they will go onto the top and bottom king pins (C) and (F).

LX1032231

15 14

1

On 730 and 733

2

On 740, 745 and 750 Continued on next page

CTM4820 (01JUL03)

15-14

LX24603,000031B –19–01JUN03–10/11

Front-Wheel Drive Axles 082903

PN=96

Knuckle Housing and Drive Shafts 15 15

7. Install tapered roller bearing cone on the bottom king pin.

LX1032229

–UN–14AUG03

8. Install drive shafts, see reference “Installing the Drive Shafts” in this Group.

LX24603,000031B –19–01JUN03–11/11

Install Knuckle Housing

–UN–15AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030168

NOTE: Install drive shafts, see reference “Installing the Drive Shafts” in this Group.

NOTE: Be careful not to damage shaft seal in axle housing. Turn drive shaft during installation until splines engage in differential.

1. Install knuckle housing assembly with drive shaft.

Continued on next page

CTM4820 (01JUL03)

15-15

LX24603,000031E –19–01JUN03–1/7

Front-Wheel Drive Axles 082903

PN=97

Knuckle Housing and Drive Shafts NOTE: Cover area of king pin indicated by the arrow with L81050 special grease (MOLYKOTE G).

–UN–14AUG03

NOTE: Coat tapered roller bearings and the knuckle pin bearing hole with John Deere multi-purpose grease.

LX1033159

2. Install bottom king pin (A) with seal ring (B) and tapered roller bearing cone (C).

3. On the cap screws for the bottom king pin, coat the threads with L41475 LOCTITE 2431 thread lock, then install the screws.

Specification 730, 733—Torque ............................................................. 115 to 125 N•m 85 to 92 lb-ft 740, 745, 750—Torque ..................................................... 160 to 200 N•m 118 to 147 lb-ft

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,000031E –19–01JUN03–2/7

–UN–14AUG03

NOTE: If knuckle pin bearing components are ever replaced with new components, preload must be adjusted at the knuckle pin bearings, so see reference “Knuckle Housing — Adjust the Preload at the Knuckle Pin Bearings” in this Group.

NOTE: Coat tapered roller bearings and the knuckle pin bearing hole with John Deere multi-purpose grease.

LX1033134

15 16

4. Insert the tapered roller bearing cone at the top.

Continued on next page

CTM4820 (01JUL03)

15-16

LX24603,000031E –19–01JUN03–3/7

Front-Wheel Drive Axles 082903

PN=98

Knuckle Housing and Drive Shafts 15 17

NOTE: Cover area of king pin indicated by the arrow with L81050 special grease (MOLYKOTE G).

LX1033135

–UN–14AUG03

5. Install top king pin (A) with shims (B) and seal ring (C).

LX24603,000031E –19–01JUN03–4/7

6. Coat cap screw threads with L41475 LOCTITE 2431 thread lock, then install the screws.

LX1030238

–UN–19AUG02

Specification 730, 733—Torque ............................................................. 115 to 125 N•m 85 to 92 lb-ft 740, 745, 750—Torque ..................................................... 160 to 200 N•m 118 to 147 lb-ft

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,000031E –19–01JUN03–5/7

NOTE: If the king pin is equipped with a steering angle sensor, install this sensor. See reference “Knuckle Housing — Remove and Install the Steering Angle Sensor” in this Group.

LX1032224

–UN–04JUL03

7. Coat threaded plugs (A; if equipped) with LOCTITE 2431 (L41475), and install them on the top and bottom king pins.

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) Continued on next page

CTM4820 (01JUL03)

15-17

LX24603,000031E –19–01JUN03–6/7

Front-Wheel Drive Axles 082903

PN=99

Knuckle Housing and Drive Shafts Final assembly

Specification 730, 733—Torque ............................................................. 200 to 220 N•m 148 to 162 lb-ft 740, 745, 750—Torque ..................................................... 350 to 390 N•m 258 to 287 lb-ft

2. Fill axle housing with oil, see reference “Axle Housing — Fill with Oil” in Group 20.

–UN–07AUG02

1. Using a new self-locking nut, install tie-rod to knuckle housing.

LX1029907

15 18

3. Install steering angle adjusting screw and adjust steering angle, see reference “Check and Adjust Steering Angle” in Group 05.

4. Install wheel hub, see reference “Installing the Wheel Hub” in Group 10.

LX24603,000031E –19–01JUN03–7/7

CTM4820 (01JUL03)

15-18

Front-Wheel Drive Axles 082903

PN=100

Knuckle Housing and Drive Shafts 15 19

CTM4820 (01JUL03)

15-19

Front-Wheel Drive Axles 082903

PN=101

Knuckle Housing and Drive Shafts

Knuckle Housing — Adjust the Preload at the Knuckle Pin Bearings

–UN–04JUL03

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1032233

1. Without applying grease, insert the tapered roller bearing cone at the top.

LX24603,0000339 –19–01JUN03–1/4

NOTE: A suitable number of shims should be added to the top king pin in order to produce a measurable amount of axial play.

–UN–04JUL03

2. Add shims (e.g. a to a total thickness of 2.0 mm) to the top king pin.

LX1032234

3. Insert the top king pin.

LX24603,0000339 –19–01JUN03–2/4

4. First install the cap screws without applying any form of thread lock.

–UN–04JUL03

Specification 730, 733—Torque ............................................................. 115 to 125 N•m 85 to 92 lb-ft 740, 745, 750—Torque ..................................................... 160 to 200 N•m 118 to 147 lb-ft

LX1032235

15 20

Continued on next page

CTM4820 (01JUL03)

15-20

LX24603,0000339 –19–01JUN03–3/4

Front-Wheel Drive Axles 082903

PN=102

Knuckle Housing and Drive Shafts 15 21

5. Install a dial gauge and measure axial play (b).

7. Calculate shim thickness (x).

LX1033133

Specification 730, 733—Preload................................................................ 0.5 to 0.6 mm 0.020 to 0.024 in.

740, 745, 750—Preload ....................................................... 0.7 to 0.8 mm 0.027 to 0.031 in.

–UN–04JUL03

6. Predefined dimension (c) of the preload at knuckle pin bearings.

For example: Dimension (a), shims required to produce play ....... 2.0 mm (0.079 in.)

Dimension (b), measured axial play ........................ 0.7 mm (0.028 in.)

Dimension (c), prescribed bearing preload .............. 0.8 mm (0.031 in.)

Formula: x = a - b - c x = 2.0 mm - 0.7 mm - 0.8 mm = 0.5 mm (x = 0.079 in. - 0.028 in. - 0.031 in. = 0.02 in.)

In this example, total shim thickness required is 0.5 mm (0.02 in.).

8. Take out the king pin again and remove shims (a).

9. Install the appropriate shim thickness (x) at the upper king pin.

10. Return knuckle housing to its original state, see reference “Install Knuckle Housing” in this Group.

LX24603,0000339 –19–01JUN03–4/4

CTM4820 (01JUL03)

15-21

Front-Wheel Drive Axles 082903

PN=103

Knuckle Housing and Drive Shafts

–UN–14AUG03

Knuckle Housing — Remove and Install the Steering Angle Sensor

LX1033156

15 22

A—Cap screws (2 used) B—Cable protection C—Steering angle sensor D—O-ring

E—Adapter F—Connecting rod G—Cap screws (4 used) H—King pin

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

I—Shims (thickness as required) J—Seal ring

Removing the steering angle sensor 1. Unplug the steering angle sensor.

Continued on next page

CTM4820 (01JUL03)

K—Tapered roller bearing cone L—Adapter

15-22

LX24603,0000236 –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=104

Knuckle Housing and Drive Shafts 2. Using the illustration as a guide, take off the components as necessary.

15 23

3. Install components (K) to (H).

4. Coat the threads of cap screws (G) with L41475 LOCTITE 2431 thread lock, then install the screws.

3. Clean the various parts, inspect them for wear or damage and replace as necessary.

Installing the steering angle sensor 1. Re-assemble the components in reverse order and comply with the following points.

Specification 730, 733—Torque ....................................................... 115 to 125 N•m 85 to 92 lb-ft 740, 745, 750—Torque............................................... 160 to 200 N•m 118 to 147 lb-ft

5. Install connecting rod (F) correctly in the square hole in adapter (L).

2. Install adapter (L) so that the two spigots sit correctly in the holes in the axle housing.

6. Place adapter (E) on connecting rod (F) in such a way that the flattened side of the hole that receives the steering angle sensor’s pivot is facing inward towards the center of the front-wheel drive axle (see enlargement in illustration).

NOTE: Cover area of king pin indicated by the arrow with L81050 special grease (MOLYKOTE G).

NOTE: Coat the tapered roller bearing with John Deere multipurpose grease.

7. Align the steering angle sensor’s pivot (C) in relation to the hole in adapter (E), and install.

NOTE: Install seal ring (J) on the king pin, see reference “Recondition the Knuckle Housing and King Pin” in this Group.

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,0000236 –19–01JUN03–2/2

Removing the Drive Shafts

–UN–15AUG02

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1030219

NOTE: Remove knuckle housing, see "Removing the Knuckle Housing" in this Group.

1. Remove drive shaft snap ring.

Continued on next page

CTM4820 (01JUL03)

15-23

LX24603,000031A –19–01JUL02–1/3

Front-Wheel Drive Axles 082903

PN=105

Knuckle Housing and Drive Shafts

LX1030220

–UN–15AUG02

2. Remove thrust washer (A).

LX24603,000031A –19–01JUL02–2/3

3. Remove the drive shaft.

LX1030221

–UN–19AUG02

4. Repair drive shaft, see “Repairing the Drive Shafts” in this Group.

LX24603,000031A –19–01JUL02–3/3

Recondition the Drive Shafts

–UN–04FEB98

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

NOTE: Remove drive shaft, see reference “Removing the Drive Shafts” in this Group.

LX1018358

15 24

Disassembling the drive shaft 1. Remove bushing (A) from drive shaft.

Continued on next page

CTM4820 (01JUL03)

15-24

LX24603,000031C –19–01JUN03–1/10

Front-Wheel Drive Axles 082903

PN=106

Knuckle Housing and Drive Shafts 15 25

LX1018359

–UN–04FEB98

2. Remove snap rings.

LX24603,000031C –19–01JUN03–2/10

3. Remove bushings (A).

LX1018360

–UN–04FEB98

4. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000031C –19–01JUN03–3/10

Assembling the drive shaft

LX1018375

–UN–04FEB98

1. Install U-joints and drive in bushings (A) by means of a pin.

LX24603,000031C –19–01JUN03–4/10

LX1018359

–UN–04FEB98

2. Install the snap rings.

Continued on next page

CTM4820 (01JUL03)

15-25

LX24603,000031C –19–01JUN03–5/10

Front-Wheel Drive Axles 082903

PN=107

Knuckle Housing and Drive Shafts

LX1018377

–UN–10FEB98

3. Heat bushing (A) to 200°C (392°F), and install it on the drive shaft as shown.

LX24603,000031C –19–01JUN03–6/10

Axle housing - removal of seal ring and bushing

LX1030234

–UN–20AUG02

1. Remove seal ring (A).

LX24603,000031C –19–01JUN03–7/10

LX1030235

–UN–20AUG02

2. Remove bushing (A).

LX24603,000031C –19–01JUN03–8/10

Axle housing - installation of seal ring and bushing

–UN–20AUG02

1. Using special tool KJD10220 (B), drive bushing (A) into the axle housing as far as it will go.

LX1030239

15 26

Continued on next page

CTM4820 (01JUL03)

15-26

LX24603,000031C –19–01JUN03–9/10

Front-Wheel Drive Axles 082903

PN=108

Knuckle Housing and Drive Shafts 15 27

2. Place seal ring (A) on seal installer KJD104201 (B) or KJD102812 with sealing lips facing away from tool.

–UN–20AUG02

3. Apply a thin coat of oil to the outside of the seal ring and drive it in as far as it will go using the special tool.

LX1030236

4. After installation, cover the area between the lips with John Deere multipurpose grease.

5. Install drive shaft, see reference “Installing the Drive Shafts” in this Group.

1

On 730 and 733

2

On 740, 745 and 750 LX24603,000031C –19–01JUN03–10/10

Installing the Drive Shafts

–UN–19AUG02

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1030237

1. Apply a thin coat of oil to the lips of the seal ring in the knuckle housing.

2. Install drive shaft in knuckle housing.

LX24603,000031D –19–01JUL02–1/3

LX1030220

–UN–15AUG02

3. Install thrust washer (A).

Continued on next page

CTM4820 (01JUL03)

15-27

LX24603,000031D –19–01JUL02–2/3

Front-Wheel Drive Axles 082903

PN=109

Knuckle Housing and Drive Shafts 4. Install the snap ring.

–UN–15AUG02

5. Install knuckle housing, see "Installing the Knuckle Housing" in this Group.

LX1030219

15 28

LX24603,000031D –19–01JUL02–3/3

CTM4820 (01JUL03)

15-28

Front-Wheel Drive Axles 082903

PN=110

Group 20

Axle Housing and Differential Special or Essential Tools

20 1

NOTE: Order tools according to information given in the U.S. SERVICEGARD Catalog or European Microfiche Tool Catalog (MTC).

SERVICEGARD is a trademark of Deere & Company

LX24603,0000340 –19–01JUN03–1/5 KJD10223 –UN–25MAR98

Bushing installer . . . . . . . . . . . . . . . . . . . . KJD10223 Axle housing, installing the axle suspension bushing

LX24603,0000340 –19–01JUN03–2/5 KJD10290 –UN–05AUG03

Holding tool . . . . . . . . . . . . . . . . . . . . . . . .KJD10290 Slackening/tightening the hex. nut on drive flange (front-wheel drive axles with TLS) LX24603,0000340 –19–01JUN03–3/5 KJD10419 –UN–05AUG03

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10419 Axle housing, installing the seal ring of the bevel pinion drive shaft (730, 733).

LX24603,0000340 –19–01JUN03–4/5 KJD10280 –UN–28OCT02

Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10280 Axle housing, installing the seal ring of the bevel pinion drive shaft (740, 745, 750).

LX24603,0000340 –19–01JUN03–5/5

CTM4820 (01JUL03)

20-1

Front-Wheel Drive Axles 082903

PN=111

Axle Housing and Differential 20 2

Other Material Number

Name

Use

L41476 (U.S.) 270 (LOCTITE)

Thread lock

Cap screws, assembly of axle housing

L414751 (U.S.) 243 (LOCTITE)

Thread lock

Fillister-head screws, ring gear on differential housing

L81050 (U.S.) MOLYKOTE G (U.S.)

Special grease

Install drive flange

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,0000346 –19–01JUN03–1/1

CTM4820 (01JUL03)

20-2

Front-Wheel Drive Axles 082903

PN=112

Axle Housing and Differential

Specifications

20 3

Item

Measurement

Specification

Assembly of axle housing, cap screws

Torque

200 to 220 N•m 148 to 162 lb-ft

Drive flange on bevel pinion drive shaft, hex. nut

Torque

245 N•m 180 lb-ft

Bevel pinion drive shaft

Rolling drag torque

2 to 2.5 N•m 1.47 to 1.84 lb-ft

Ring gear to differential housing, fillister-head screws

Torque

104 to 128 N•m 77 to 94 lb-ft

Differential, taper roller bearings

Preload

0.05 to 0.10 mm 0.002 to 0.004 in.

730 and 733

Play

0.27 to 0.35 mm 0.0106 to 0.0138 in.

740

Play

0.25 to 0.33 mm 0.0098 to 0.0130 in.

745 and 750

Play

0.22 to 0.28 mm 0.0087 to 0.0110 in.

Torque

90 N•m 66 lb-ft

Ring gear, backlash:

Axle housing, screw plug

LX24603,0000342 –19–01JUN03–1/1

CTM4820 (01JUL03)

20-3

Front-Wheel Drive Axles 082903

PN=113

Axle Housing and Differential

–UN–07AUG03

Differential — Sectional View

LX1033137

20 4

Differential, 730 and 733 without TLS A—Axle housing B—Shims (thickness as required) C—Disk pack D—Thrust washer

E—Differential housing F—Bevel pinion (2 used) G—Thrust washer (2 used) H—Drive bevel gear (2 used) I—Axle housing

J—Ring gear K—Bevel pinion drive shaft L—Drive flange M—Shims (thickness as required)

Continued on next page

CTM4820 (01JUL03)

20-4

N—Seal ring O—O-ring P—Shims (thickness as required)

LX24603,000033D –19–01JUN03–1/4

Front-Wheel Drive Axles 082903

PN=114

Axle Housing and Differential

LX1030488

–UN–29OCT02

20 5

Differential, 740, 745 and 750 without TLS A—Axle housing B—Shims (thickness as required) C—Disk pack D—Thrust washer

E—Differential housing F—Bevel pinion (4 used) G—Thrust washer (4 used) H—Drive bevel gear (2 used) I—Axle housing

J—Ring gear K—Bevel pinion drive shaft L—Drive flange M—Shims (thickness as required)

N—Seal ring O—O-ring P—Shims (thickness as required)

NOTE: On 740 axles, the axle housings and differential are transposed (mirror-image).

Continued on next page

CTM4820 (01JUL03)

20-5

LX24603,000033D –19–01JUN03–2/4

Front-Wheel Drive Axles 082903

PN=115

Axle Housing and Differential

LX1033138

–UN–07AUG03

20 6

Differential, 730 and 733 with TLS A—Axle housing B—Shims (thickness as required) C—Disk pack D—Thrust washer

E—Differential housing F—Bevel pinion (2 used) G—Thrust washer (2 used) H—Drive bevel gear (2 used) I—Axle housing

J—Ring gear K—Bevel pinion drive shaft L—Drive flange M—Shims (thickness as required)

Continued on next page

CTM4820 (01JUL03)

20-6

N—Seal ring O—O-ring P—Shims (thickness as required)

LX24603,000033D –19–01JUN03–3/4

Front-Wheel Drive Axles 082903

PN=116

Axle Housing and Differential

LX1030489

–UN–24OCT02

20 7

Differential, 740, 745 and 750 with TLS A—Axle housing B—Shims (thickness as required) C—Disk pack D—Thrust washer

E—Differential housing F—Bevel pinion (4 used) G—Thrust washer (4 used) H—Drive bevel gear (2 used) I—Axle housing

J—Ring gear K—Bevel pinion drive shaft L—Drive flange M—Shims (thickness as required)

N—Seal ring O—O-ring P—Shims (thickness as required)

NOTE: On 740 axles, the axle housings and differential are transposed (mirror-image).

LX24603,000033D –19–01JUN03–4/4

CTM4820 (01JUL03)

20-7

Front-Wheel Drive Axles 082903

PN=117

Axle Housing and Differential

–UN–05AUG03

Differential — Exploded View

LX1033139

20 8

Differential on 730 and 733 A—Tapered roller bearing cone B—Fillister-head screw (16 used) C—Ring gear

D—Differential housing E—Externally splined disk (4 used) F—Internally splined disk (3 used)

G—Thrust washer H—Drive bevel gear I—Thrust washer (2 used) J—Bevel pinion (2 used) K—Shaft

Continued on next page

CTM4820 (01JUL03)

20-8

L—Spring pin M—Differential housing N—Tapered roller bearing cone

LX24603,000033E –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=118

Axle Housing and Differential

LX1033140

–UN–05AUG03

20 9

Differential, 740, 745 and 750 A—Tapered roller bearing cone B—Fillister-head screw (16 used) C—Ring gear

D—Differential housing E—Externally splined disk (4 used) F—Internally splined disk (3 used)

G—Thrust washer H—Drive bevel gear I—Thrust washer (4 used) J—Bevel pinion (4 used)

K—Shaft (2 used) L—Differential housing M—Tapered roller bearing cone

NOTE: On 740 axles, the differential is transposed (mirror-image).

LX24603,000033E –19–01JUN03–2/2

CTM4820 (01JUL03)

20-9

Front-Wheel Drive Axles 082903

PN=119

Axle Housing and Differential

–UN–05AUG03

Axle Housing - Exploded View

LX1033141

20 10

Without TLS A—L.h. half of axle housing B—Screw plug C—Shims (thickness as required) D—Tapered roller bearing cup E—Bushing

F—Differential assembly G—R.h. half of axle housing H—O-ring I—Bevel pinion drive shaft J—Tapered roller bearing cone K—Tapered roller bearing cup

L—Shims (thickness as required) M—Tapered roller bearing cup N—Tapered roller bearing cone O—Seal ring

P—O-ring Q—Drive flange R—Shims (thickness as required) S—Washer T—Self-locking hex. nut

NOTE: 730, 733 and 740 axles have the axle housing and differential transposed (mirror-image).

Continued on next page

CTM4820 (01JUL03)

20-10

LX24603,000033F –19–01JUN03–1/2

Front-Wheel Drive Axles 082903

PN=120

Axle Housing and Differential

LX1033142

–UN–05AUG03

20 11

With TLS A—L.h. half of axle housing B—Stop C—Screw plug D—Shims (thickness as required) E—Tapered roller bearing cup

F—Differential assembly G—R.h. half of axle housing H—O-ring I—Bevel pinion drive shaft J—Tapered roller bearing cone K—Tapered roller bearing cup

L—Shims (thickness as required) M—Tapered roller bearing cup N—Tapered roller bearing cone O—Seal ring

P—O-ring Q—Drive flange R—Shims (thickness as required) S—Washer T—Self-locking hex. nut

NOTE: 730, 733 and 740 axles have the axle housing and differential transposed (mirror-image).

LX24603,000033F –19–01JUN03–2/2

CTM4820 (01JUL03)

20-11

Front-Wheel Drive Axles 082903

PN=121

Axle Housing and Differential

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1018418

NOTE: Remove tie rods and king pins, see "Removing the Knuckle Housing" in Group 15.

–UN–04FEB98

Removing the Axle Housing

1. Remove screw plug and drain oil.

LX24603,0000329 –19–01JUL02–1/3

2. Remove top and bottom king pins.

–UN–20AUG02

NOTE: Carefully remove drive output assembly to avoid damaging shaft seal ring in axle housing.

LX1030132

3. Remove planetary drive, wheel hub and knuckle housing with drive shaft.

LX24603,0000329 –19–01JUL02–2/3

4. Remove cap screws.

6. Repair axle housing. See “Repairing the Axle Housing” in this Group.

–UN–20AUG02

5. Separate axle housings.

LX1030154

20 12

LX24603,0000329 –19–01JUL02–3/3

CTM4820 (01JUL03)

20-12

Front-Wheel Drive Axles 082903

PN=122

Axle Housing and Differential

Repairing the Axle Housing

NOTE: Remove axle housing, see "Removing the Axle Housing" in this Group.

1. Remove and install bearing and seal rings from axle housing yoke:

LX1018467

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

–UN–04FEB98

20 13

See “Repairing the Knuckle Housing and the King Pin” and “Repairing the Drive Shafts” in Group 15.

2. Removal and installation of bevel pinion drive shaft: See "Removing the Bevel Pinion Drive Shaft" and "Installing the Bevel Pinion Drive Shaft" in this Group.

3. Remove and install differential: See "Removing the Differential" and "Installing the Differential" in this Group.

4. Removal and installation of steering cylinder: See "Removing the Steering Cylinder" and "Installing the Tie Rods" in Group 05.

5. Using special tool KJD10223 (A), install the axle suspension bushings1 in such a way that the hole (see arrow) is aligned with the grease fitting.

6. Install axle housing, see "Installing the Axle Housing" in this Group.

1

on axles without TLS LX24603,000032A –19–01JUL02–1/1

CTM4820 (01JUL03)

20-13

Front-Wheel Drive Axles 082903

PN=123

Axle Housing and Differential

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1030155

1. Apply oil to O-ring (A) and install it.

–UN–20AUG02

Installing the Axle Housing

LX24603,000032B –19–01JUN03–1/3

2. Join the two halves of the axle housing together.

3. Coat cap screw threads with LOCTITE 270 (L41476).

LX1030156

Specification Cap screws—Torque ......................................................... 200 to 220 N•m 148 to 162 lb-ft

–UN–20AUG02

4. Install cap screws.

LOCTITE is a registered trademark of the Loctite Corporation

LX24603,000032B –19–01JUN03–2/3

5. Install knuckle housing with drive shaft, wheel hub and planetary drive, see "Installing the Knuckle Housing" in Group 15.

6. Install tie rods, see "Installing the Tie Rods" in Group 05.

7. Fill with oil, see "Axle Housing - Fill with Oil" in this Group.

–UN–20AUG02

NOTE: Be careful not to damage shaft seal in axle housing. Turn drive shaft during installation until splines engage in differential.

LX1030132

20 14

LX24603,000032B –19–01JUN03–3/3

CTM4820 (01JUL03)

20-14

Front-Wheel Drive Axles 082903

PN=124

Axle Housing and Differential

Remove the Bevel Pinion Drive Shaft

20 15

–UN–04FEB98

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1018427

NOTE: Remove axle housing, see reference “Removing the Axle Housing” in this Group.

Remove differential, see reference “Removing the Differential” in this Group.

Without TLS

NOTE: Keep hex. nut for later rolling drag torque adjustment of the bevel pinion drive shaft.

1. Remove self-locking hex. nut and washer.

LX1030242

–UN–20AUG02

On front-wheel drive axles with TLS, use special tool KJD10290 to loosen the hex. nut.

With TLS LX24603,000032C –19–01JUN03–1/7

2. Remove shims (A) and keep them for later use.

LX1030243

–UN–20AUG02

3. Remove drive flange (B).

LX24603,000032C –19–01JUN03–2/7

NOTE: To prevent bevel pinion drive shaft from falling out, hold shaft.

LX1030244

–UN–20AUG02

4. Remove bevel pinion drive shaft.

Continued on next page

CTM4820 (01JUL03)

20-15

LX24603,000032C –19–01JUN03–3/7

Front-Wheel Drive Axles 082903

PN=125

Axle Housing and Differential

LX1030245

–UN–20AUG02

5. Remove seal ring.

LX24603,000032C –19–01JUN03–4/7

LX1030246

–UN–20AUG02

6. Remove outer tapered roller bearing cone.

LX24603,000032C –19–01JUN03–5/7

LX1030247

–UN–20AUG02

7. Remove outer tapered roller bearing cup.

LX24603,000032C –19–01JUN03–6/7

NOTE: Take care that the shims do not get lost.

9. Repair bevel pinion drive shaft, see reference “Repairing the Bevel Pinion Drive Shaft” in this Group.

–UN–20AUG02

8. Remove inner tapered roller bearing cup.

LX1030248

20 16

LX24603,000032C –19–01JUN03–7/7

CTM4820 (01JUL03)

20-16

Front-Wheel Drive Axles 082903

PN=126

Axle Housing and Differential

Repairing the Bevel Pinion Drive Shafts

NOTE: Remove bevel pinion drive shaft, see "Removing the Bevel Pinion Drive Shaft" in this Group.

1. Pull the tapered roller bearing cone off the bevel pinion drive shaft.

LX1018430

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

–UN–04FEB98

20 17

2. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,000032D –19–01JUL02–1/2

LX1018444

4. Install bevel pinion drive shaft, see "Installing the Bevel Pinion Drive Shaft" in this Group.

–UN–04FEB98

3. Heat tapered roller bearing cone to 90-100°C (195-215°F) and install it on the bevel pinion drive shaft.

LX24603,000032D –19–01JUL02–2/2

CTM4820 (01JUL03)

20-17

Front-Wheel Drive Axles 082903

PN=127

Axle Housing and Differential

Install the Bevel Pinion Drive Shaft

–UN–04AUG03

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

Bevel pinion drive shaft - cone point adjustment

LX1033160

NOTE: Figure (a) is given either as an actual dimension (e.g. 147.65) or as a tolerance (e.g. -0.35) in relation to the nominal dimension.

1. Read figure (a), which is prefixed with a “Z”, at the flange on the longer axle housing.

LX24603,000032E –19–01JUN03–1/15

LX1033161

–UN–04AUG03

2. Read dimension (b) on the bevel pinion drive shaft.

LX24603,000032E –19–01JUN03–2/15

–UN–09FEB95

3. Measure bearing width (c).

LX003237

20 18

Continued on next page

CTM4820 (01JUL03)

20-18

LX24603,000032E –19–01JUN03–3/15

Front-Wheel Drive Axles 082903

PN=128

Axle Housing and Differential 20 19

4. Calculate shim thickness (x).

Example I, if figure given is actual dimension: Figure (a) read on the longer axle housing ....... 147.65 mm (5.813 in.)

Figure (b) read on the bevel pinion drive shaft . 117.10 mm (4.610 in.)

Measurement (c), bearing width ......................... 29.25 mm (1.152 in.)

–UN–22AUG02

Formula: x = a - b - c x = 147.65 mm - 117.10 mm - 29.25 mm = 1.30 mm

LX1030250

(x = 5.813 in. - 4.610 in. - 1.152 in. = 0.051 in.)

In this example, total shim thickness required is 1.30 mm (0.051 in.).

Example II, if figure given is a tolerance: Dimension (d) — nominal dimension of axle housing 730

733 138.5 mm (5.453 in.)

740 144.5 mm (5.689 in.)

745

750 148.0 mm (5.827 in.)

Figure (a), tolerance read on the axle housing .... -0.35 mm (0.014 in.)

Figure (b) read on the bevel pinion drive shaft . 117.10 mm (4.610 in.)

Measurement (c), bearing width ......................... 29.25 mm (1.152 in.)

Dimension (d), nominal dimension taken from the table (e.g. for 750) .. ............................................................................... 148.0 mm (5.827 in.)

NOTE: If tolerance figure (a) has no sign in front of it or if it is prefixed with a “+”, it should be added to nominal dimension (d); if it is prefixed with a “-”, it should be subtracted from the nominal dimension.

Formula: x = d ± a - b - c x = 148.0 mm - 0.35 mm - 117.10 mm - 29.25 mm x = 1.30 mm (x = 5.827 in. - 0.014 in. - 4.610 in. - 1.152 in.) (x = 0.051 in.)

In this example, total shim thickness required is 1.30 mm (0.051 in.).

Continued on next page

CTM4820 (01JUL03)

20-19

LX24603,000032E –19–01JUN03–4/15

Front-Wheel Drive Axles 082903

PN=129

Axle Housing and Differential Installing the bevel pinion drive shaft 1. Install shims (A) of the calculated thickness.

LX1030251

–UN–20AUG02

2. Chill inner tapered roller bearing cup (B), and install.

LX24603,000032E –19–01JUN03–5/15

LX1030252

–UN–20AUG02

3. Chill outer tapered roller bearing cup (A), and install.

LX24603,000032E –19–01JUN03–6/15

LX1030253

–UN–20AUG02

4. Install bevel pinion drive shaft in axle housing.

LX24603,000032E –19–01JUN03–7/15

–UN–20AUG02

5. Heat tapered roller bearing cone to 90-100°C (195-215°F), and install.

LX1030254

20 20

Continued on next page

CTM4820 (01JUL03)

20-20

LX24603,000032E –19–01JUN03–8/15

Front-Wheel Drive Axles 082903

PN=130

Axle Housing and Differential 20 21

NOTE: Do not install seal ring behind drive flange yet.

LX1030243

–UN–20AUG02

6. Install drive flange (B) and old shims (A).

LX24603,000032E –19–01JUN03–9/15

7. Install washer and, at this stage, the OLD self-locking hex nut. While tightening the hex. nut turn the bevel pinion drive shaft several times in both directions.

–UN–20AUG02

On front-wheel drive axles with TLS, use special tool KJD10290 to tighten the hex. nut.

LX1030255

Specification Hex. nut—Torque ......................................................................... 245 N•m 180 lb-ft

LX24603,000032E –19–01JUN03–10/15

Bevel pinion drive shaft - rolling drag torque check and adjustment (without oil seal)

–UN–21AUG02

1. Check rolling drag torque of bevel pinion drive shaft.

LX1030256

Specification Bevel pinion drive shaft—Rolling drag torque ............................................................................. 2 to 2.5 N•m 1.47 to 1.84 lb-ft

2. If the specified rolling drag torque is not achieved by using the old shims, correct rolling drag value by installing appropriate new shims.

Continued on next page

CTM4820 (01JUL03)

20-21

LX24603,000032E –19–01JUN03–11/15

Front-Wheel Drive Axles 082903

PN=131

Axle Housing and Differential Bevel pinion drive shaft — final assembly

–UN–20AUG02

1. Remove the drive flange of the bevel pinion drive shaft again.

2. Apply a thin coat of oil to the outer circumference of the seal ring.

LX1030257

3. Install seal ring using special tool KJD104191 (A) or KJD102802.

4. After installation, cover the area between the lips of the oil seal ring with grease.

1

On 730 and 733

2

On 740, 745 and 750 LX24603,000032E –19–01JUN03–12/15

5. Apply grease to O-ring (A) and install it in the drive flange.

LX1030258

–UN–20AUG02

6. Coat meshing splines of drive flange and bevel pinion drive shaft with special grease MOLYKOTE G (L81050).

LX24603,000032E –19–01JUN03–13/15

–UN–20AUG02

7. Install drive flange (B) and shims (A) of calculated thickness.

LX1030243

20 22

Continued on next page

CTM4820 (01JUL03)

20-22

LX24603,000032E –19–01JUN03–14/15

Front-Wheel Drive Axles 082903

PN=132

Axle Housing and Differential 20 23

8. Install washer.

Specification Hex. nut—Torque ......................................................................... 245 N•m 180 lb-ft

10. Install differential, see reference “Install Differential”in this Group.

LX1030255

On front-wheel drive axles with TLS, use special tool KJD10290 to tighten the hex. nut.

–UN–20AUG02

9. Install NEW self-locking hex. nut.

LX24603,000032E –19–01JUN03–15/15

CTM4820 (01JUL03)

20-23

Front-Wheel Drive Axles 082903

PN=133

Axle Housing and Differential

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

LX1030259

NOTE: Remove axle housing, see "Removing the Axle Housing" in this Group.

–UN–20AUG02

Removing the Differential

1. Remove differential (A).

LX24603,000032F –19–01JUL02–1/2

2. Remove bearing cups (A) and (B) of differential from both axle housings.

3. Remove shims behind the bearing cups.

–UN–20AUG02

LX1030260

4. Repair differential, see “Repairing the Differential” in this Group.

–UN–20AUG02

NOTE: Measure and note the thickness of the shims.

LX1030261

20 24

LX24603,000032F –19–01JUL02–2/2

CTM4820 (01JUL03)

20-24

Front-Wheel Drive Axles 082903

PN=134

Axle Housing and Differential

Recondition the Differential

20 25

–UN–20AUG02

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

LX1030262

NOTE: Remove differential, see reference “Removing the Differential” in this Group.

Disassembling the differential (730, 733) 1. Remove tapered roller bearing cups from differential.

LX24603,0000330 –19–01JUN03–1/25

2. If not marked, mark housing (see arrows).

LX1033152

–UN–14JUL03

3. Remove fillister-head screws.

LX24603,0000330 –19–01JUN03–2/25

LX1033143

–UN–14JUL03

4. Remove ring gear.

Continued on next page

CTM4820 (01JUL03)

20-25

LX24603,0000330 –19–01JUN03–3/25

Front-Wheel Drive Axles 082903

PN=135

Axle Housing and Differential

LX1033144

–UN–14JUL03

5. Take off the top part of the housing together with the disk pack and the drive bevel gear.

LX24603,0000330 –19–01JUN03–4/25

6. Drive the spring pin out of the shaft and housing.

7. Remove the various components from the two halves of the housing.

LX1033145

–UN–14JUL03

8. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,0000330 –19–01JUN03–5/25

Assembling the differential (730, 733) 1. Pre-assemble the drive bevel gears:

–UN–04FEB98

a. Coat all the parts with oil.

NOTE: Lined side of thrust washer (B) must face disk pack.

LX1018454

20 26

b. Install the thrust washer and splined disks on the drive bevel gears.

A—Bevel gear B—Thrust washer C—Externally splined disk (4 used) D—Internally splined disk (3 used)

Continued on next page

CTM4820 (01JUL03)

20-26

LX24603,0000330 –19–01JUN03–6/25

Front-Wheel Drive Axles 082903

PN=136

Axle Housing and Differential 20 27

LX1033146

–UN–14JUL03

2. Locate the pre-assembled drive bevel gears in the two halves of the housing.

LX24603,0000330 –19–01JUN03–7/25

LX1033147

–UN–14JUL03

3. Apply oil to bevel pinions (A) and thrust washers (B), and install them on the shaft.

LX24603,0000330 –19–01JUN03–8/25

LX1033148

–UN–14JUL03

4. Turn the pre-assembled shaft so that bore (A) is aligned with bore (B), and install.

LX24603,0000330 –19–01JUN03–9/25

LX1033149

–UN–14JUL03

5. Install spring pin (A).

Continued on next page

CTM4820 (01JUL03)

20-27

LX24603,0000330 –19–01JUN03–10/25

Front-Wheel Drive Axles 082903

PN=137

Axle Housing and Differential NOTE: Align the marks on the housing halves.

LX1033150

–UN–14JUL03

6. Bring the pre-assembled upper housing half down onto the lower housing half.

LX24603,0000330 –19–01JUN03–11/25

LX1033143

–UN–14JUL03

7. Install the ring gear.

LX24603,0000330 –19–01JUN03–12/25

8. Coat the threads on the fillister-head screws with L41475 LOCTITE 2431 thread lock.

–UN–14JUL03

9. Install fillister-head screws and evenly tighten them cross-wise.

Specification Fillister-head screws—Torque ........................................... 104 to 128 N•m 77 to 94 lb-ft

LX1033151

20 28

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) Continued on next page

CTM4820 (01JUL03)

20-28

LX24603,0000330 –19–01JUN03–13/25

Front-Wheel Drive Axles 082903

PN=138

Axle Housing and Differential 20 29

10. Install tapered roller bearing cones (A and B), one at a time, on the differential housing.

LX1030479

–UN–21AUG02

11. Install differential, see reference “Install Differential” in this Group.

LX24603,0000330 –19–01JUN03–14/25

Disassembling the differential (740, 745, 750)

LX1030262

–UN–20AUG02

1. Remove tapered roller bearing cups from differential.

LX24603,0000330 –19–01JUN03–15/25

2. If not marked, mark housing (see arrows).

LX1030263

–UN–20AUG02

3. Remove fillister-head screws.

LX24603,0000330 –19–01JUN03–16/25

LX1030264

–UN–20AUG02

4. Remove ring gear (A) housing (B).

Continued on next page

CTM4820 (01JUL03)

20-29

LX24603,0000330 –19–01JUN03–17/25

Front-Wheel Drive Axles 082903

PN=139

Axle Housing and Differential

LX1030266

–UN–21AUG02

5. Remove housing.

LX24603,0000330 –19–01JUN03–18/25

6. Remove all parts.

LX1030267

–UN–21AUG02

7. Clean the various parts, inspect them for wear or damage and replace as necessary.

LX24603,0000330 –19–01JUN03–19/25

Assembling the differential (740, 745, 750) 1. Pre-assemble the bevel gears:

–UN–04FEB98

a. Coat all the components with oil.

NOTE: Lined side of thrust washer (B) must face disk pack.

LX1018454

20 30

b. Install the thrust washer and splined disks on the drive bevel gears.

A—Bevel gear B—Thrust washer C—Externally splined disk (4 used) D—Internally splined disk (3 used)

Continued on next page

CTM4820 (01JUL03)

20-30

LX24603,0000330 –19–01JUN03–20/25

Front-Wheel Drive Axles 082903

PN=140

Axle Housing and Differential 20 31

LX1030268

–UN–21AUG02

2. Locate the pre-assembled drive bevel gears in the two halves of the housing.

LX24603,0000330 –19–01JUN03–21/25

3. Apply oil to the bevel pinions, shafts and thrust washers and install them.

LX1030476

–UN–21AUG02

A—Bevel pinion (4 used) B—Shaft (2 used) C—Thrust washer (4 used)

LX24603,0000330 –19–01JUN03–22/25

NOTE: Align the marks on the housing halves.

LX1033153

–UN–14JUL03

4. Bring the pre-assembled upper housing half down onto the lower housing half.

Continued on next page

CTM4820 (01JUL03)

20-31

LX24603,0000330 –19–01JUN03–23/25

Front-Wheel Drive Axles 082903

PN=141

Axle Housing and Differential 5. Install the ring gear.

Specification Fillister-head screws—Torque ........................................... 104 to 128 N•m 77 to 94 lb-ft

LX1030478

7. Install fillister-head screws and evenly tighten them cross-wise.

–UN–21AUG02

6. Coat the threads on the fillister-head screws with L41475 LOCTITE 2431 thread lock.

LOCTITE is a registered trademark of the Loctite Corporation 1

for North America: LOCTITE 242 (TY9370) LX24603,0000330 –19–01JUN03–24/25

8. Install tapered roller bearing cones (A and B), one at a time, on the differential housing.

–UN–21AUG02

9. Install differential, see reference “Install Differential” in this Group.

LX1030479

20 32

LX24603,0000330 –19–01JUN03–25/25

CTM4820 (01JUL03)

20-32

Front-Wheel Drive Axles 082903

PN=142

Axle Housing and Differential 20 33

CTM4820 (01JUL03)

20-33

Front-Wheel Drive Axles 082903

PN=143

Axle Housing and Differential

Install Differential

–UN–06AUG03

CAUTION: Follow safety and repair instructions, see reference “General Safety and Repair Information” in Group 01.

Differential — bearing preload adjustment

LX1033162

NOTE: Figures (a) and (b) are given either as an actual dimension (e.g. 188 or 8) or as a tolerance (e.g.

0.2) in relation to the nominal dimension.

1. Read figure (a), which is prefixed with a “W”, at the flange on the longer axle housing.

–UN–06AUG03

2. Read figure (b), which is prefixed with a “W”, at the shorter axle housing.

3. Place the tapered roller bearing cups onto the bearing cones on the differential.

LX1033163

4. Place the differential with the bearing cup onto a suitable device on a flat surface.

5. Turn differential and tapered roller bearing cup several times in both directions.

–UN–21AUG02

IMPORTANT: Make sure that differential and bearing cups are in the correct position as otherwise the result of the measurement will be incorrect.

NOTE: Measure at various points and determine the average value.

LX1030482

20 34

6. Measure dimension (c).

7. Predefined dimension (d) of the bearing preload.

Specification Tapered roller bearing—Preload ...................................... 0.05 to 0.10 mm 0.002 to 0.004 in.

Continued on next page

CTM4820 (01JUL03)

20-34

LX24603,0000331 –19–01JUN03–1/8

Front-Wheel Drive Axles 082903

PN=144

Axle Housing and Differential 20 35

8. Calculate total shim thickness (x = x1 + x2).

Example I, if figure given is actual dimension: Figure (a) read on the longer axle housing ......... 188.0 Figure (b) read on the shorter axle housing ............ 8.0 Dimension (c) measured at differential ................ 194.0 Dimension (d), prescribed bearing preload ........... 0.10

mm mm mm mm

(7.401 (0.315 (7.638 (0.004

in.) in.) in.) in.)

–UN–22AUG02

Formula: x = (a + b) - c + d x = (188 + 8) - 194 + 0.1 = 2.1 mm

LX1030495

(x = (7.401 + 0.315) - 7.638 + 0.004 = 0.082 in.)

In this example, total shim thickness required is 2.1 mm (0.082 in.).

Example II, if figure given is a tolerance: Dimension (e) — nominal dimension of longer axle housing 730

733

740

745

750

187.8 mm (7.394 in.)

Dimension (f) — nominal dimension of shorter axle housing 730

733

8.0 mm (0.315 in.)

740

745

750

7.8 mm (0.307 in.)

Figure (a) read on the longer axle housing ............. 0.2 Figure (b) read on the shorter axle housing ............ 0.2 Dimension (c) measured at differential ................ 194.0 Dimension (d), prescribed bearing preload ........... 0.10 Dimension (e) taken from the table ..................... 187.8 Dimension (f) taken from the table (e.g. for 750) .... 7.8

mm mm mm mm mm mm

(0.008 (0.008 (7.638 (0.004 (7.393 (0.307

in.) in.) in.) in.) in.) in.)

NOTE: If tolerance figure (a or b) has no sign in front of it or if it is prefixed with a “+”, it should be added to nominal dimension (e or f); if it is prefixed with a “-”, it should be subtracted from the nominal dimension.

Formula: x = (e ± a) + (f ± b) - c + d x = (187.8 + 0.2) + (7.8 + 0.2) - 194.0 + 0.1 x = 2.1 mm (x = (7.393 + 0.008) + (0.307 + 0.008) - 7.638 + 0.004) (x = 0.082 in.)

Continued on next page

CTM4820 (01JUL03)

20-35

LX24603,0000331 –19–01JUN03–2/8

Front-Wheel Drive Axles 082903

PN=145

Axle Housing and Differential In this example, total shim thickness required is 2.1 mm (0.082 in.).

LX24603,0000331 –19–01JUN03–3/8

NOTE: Place shims of former thickness on the front side of the ring gear (axle housing, upper picture).

–UN–21AUG02

9. Place shims (A) of calculated thickness on the right and left half of the axle housing.

LX1030484

–UN–21AUG02

LX1030483

10. Install tapered roller bearing cups (B).

LX24603,0000331 –19–01JUN03–4/8

NOTE: For checking load pattern, coat several ring gear teeth with marking blue.

–UN–20AUG02

11. Install differential (A).

LX1030259

20 36

Continued on next page

CTM4820 (01JUL03)

20-36

LX24603,0000331 –19–01JUN03–5/8

Front-Wheel Drive Axles 082903

PN=146

Axle Housing and Differential 20 37

LX1030155

–UN–20AUG02

12. Apply oil to O-ring (A) and install it.

LX24603,0000331 –19–01JUN03–6/8

13. Using the cap screws, join the halves of axle housing.

LX1030156

–UN–20AUG02

Specification Cap screws—Torque .......................................................... 200 to 220N•m 148 to 162 lb-ft

Continued on next page

CTM4820 (01JUL03)

20-37

LX24603,0000331 –19–01JUN03–7/8

Front-Wheel Drive Axles 082903

PN=147

Axle Housing and Differential Differential - check ring gear backlash and load pattern

–UN–21AUG02

1. Turn the drive pinion several times in each direction.

2. Install a dial indicator and suitable device. Dimension (a) 50 mm (1.968 in.).

LX1030485

3. Measure backlash.

Specification 730 and 733—Backlash ................................................... 0.27 to 0.35 mm 0.0106 to 0.0138 in.

740—Backlash.................................................................. 0.25 to 0.33 mm 0.0098 to 0.0130 in.

745 and 750—Backlash ................................................... 0.22 to 0.28 mm 0.0087 to 0.0110 in.

–UN–22AUG02

4. If necessary, correct backlash by moving an appropriate shim. Do not add or remove shims. See "Differential - bearing preload adjustment", steps 9 and 10.

LX1030486

• Not enough backlash: Move shim from the rear side of the ring gear to the front side (toothed side).

• Too much backlash: Move shim from the front side (toothed side) of the ring gear to the rear side.

5. Remove axle housing and differential again.

–UN–22AUG02

6. Compare ring gear load pattern on both sides of the teeth with the illustration.

NOTE: If differences occur, recheck all adjustments carried out so far on bevel pinion drive shaft and on differential.

LX1030494

20 38

7. Install axle housing, see reference “Installing the Axle Housing” in this Group.

A—Ideal load pattern B—Teeth distance must be decreased C—Teeth distance must be increased D—Decrease distance (pattern B) E—Increase distance (pattern C)

LX24603,0000331 –19–01JUN03–8/8

CTM4820 (01JUL03)

20-38

Front-Wheel Drive Axles 082903

PN=148

Axle Housing and Differential

Axle Housing - Fill with Oil

IMPORTANT: Exclusively use oil types specified in the relevant tractor Technical Manual.

Refer to "Front Wheel Drive Axle Oil" and "Capacities" in Technical Manual "Repair", Section 10, Group 05.

LX1030487

CAUTION: Follow safety and repair instructions, see "General Safety and Repair Information" in Group 01.

–UN–21AUG02

20 39

1. Axle must be in horizontal position.

2. Install screw plug (B) with new O-ring.

Specification Screw plug—Torque ....................................................................... 90 N•m 66 lb-ft

3. Remove screw plug (A) and fill in oil until it is level with lower edge of plug bore.

4. Install screw plug (A) with new O-ring.

Specification Screw plug—Torque ....................................................................... 90 N•m 66 lb-ft

LX24603,0000332 –19–01JUL02–1/1

CTM4820 (01JUL03)

20-39

Front-Wheel Drive Axles 082903

PN=149

Axle Housing and Differential 20 40

CTM4820 (01JUL03)

20-40

Front-Wheel Drive Axles 082903

PN=150

Group 200

Description and Theory of Operation Front Wheel Drive Axles - Summary of References

200 1

Operation of the front wheel drive axles is dealt with at the following references: • • • • • • •

“Description of Front Wheel Drive” “Layout of Front Axle” “Operation of Differential” “Operation of Self-Locking Differential” “Operation of Planetary Drive” “Operation of Multi-Disk Brake” “Positive Front Wheel Lead Check”

LX24603,0000347 –19–01JUL02–1/1

CTM4820 (01JUL03)

200-1

Front-Wheel Drive Axles 082903

PN=151

Description and Theory of Operation

–UN–11DEC01

Description of Front Wheel Drive

LX1027668

200 2

A—Front-wheel drive clutch

B—U-jointed shaft

When front wheel drive is selected on tractors equipped with front wheel drive, all four wheels are driven simultaneously. This increases the tractor’s pulling power and reduces wheel slip.

Power is transmitted from the transmission to the rear wheels via the final drives. At the same time, power is transmitted from the transmission via front wheel drive clutch (A) to universal jointed shaft (B), which then drives the front wheel drive axle (C) and thus provides power directly to the front wheels.

Front wheel drive is engaged and disengaged by means of a rocker switch. When front wheel drive is engaged, a solenoid valve interrupts the flow of oil to the front wheel drive clutch. Belleville springs

C—Front-wheel drive axle

compress the disk pack in the front wheel drive clutch and form a connection between the transmission and front wheel drive axle. When front wheel drive is disengaged, oil flows from the solenoid valve to the front wheel drive clutch. The Belleville springs are compressed by the oil pressure and the disk pack is released. There is no longer a connection between the transmission and the front wheel drive axle. Front wheel drive is always engaged when the engine is shut off, as the transmission pump stops pumping oil.

Changing the gear pair or the tire combination enables an overrun of between 1.5 and 4% to be obtained at the front wheel drive axle. This means that the front wheels turn slightly faster than the rear wheels. This improves the tractor’s traction.

LX24603,0000294 –19–07NOV01–1/1

CTM4820 (01JUL03)

200-2

Front-Wheel Drive Axles 082903

PN=152

Description and Theory of Operation

Layout of Front Axle

LX003426

–UN–10FEB95

200 3

A—Axle housing B—Differential

C—Knuckle housing D—Wheel hub with planetary drive

E—Drive shaft

F—Steering cylinder

Axle housing (A) consists of two or three parts which are flanged together. The ends of the axle housing are shaped like forks, to which the axle knuckle housings (C) are attached.

Located inside the differential housing are the drive bevel gears and bevel pinions, together with two disk packs which permit self-locking. The differential is designed to be self-locking. In most cases, this prevents wheel spin when moving off and when the machine is in motion (e.g. due to slippery conditions).

Knuckle housing

Drive shafts

Axle knuckle housings (C) provide the connection between the axle housing and the wheel hubs (D). The axle knuckle housings enable the axle to be steered.

Drive shafts (E) transmit power from the differential to the wheel hubs. The universal joint on each drive shaft compensates for the different locations of the differential and wheel hubs.

Axle housing

Differential Wheel hub with planetary drive Differential (B) is located in the center of the front wheel drive axle. The differential allows the two front wheels to turn at different speeds, e.g. when cornering.

The differential consists of the differential housing, ring gear and drive pinion. The drive pinion transmits power from the universal jointed shaft to the differential.

The gears of the planetary drive (D) are driven by the drive shaft. The planetary gears rotate around the stationary hollow ring gear, taking the planetary carrier and wheel hub with them. The planetary drive reduces speed and increases torque.

Continued on next page

CTM4820 (01JUL03)

200-3

LX24603,0000348 –19–01JUL02–1/2

Front-Wheel Drive Axles 082903

PN=153

Description and Theory of Operation 200 4

Steering cylinder The steering cylinder (F) is integrated into the axle housing. It consists of a cylinder sleeve and a piston

with a piston rod at both ends. The piston area is the same at either end and the steering system is therefore fully balanced.

LX24603,0000348 –19–01JUL02–2/2

CTM4820 (01JUL03)

200-4

Front-Wheel Drive Axles 082903

PN=154

Description and Theory of Operation

Operation of Differential

LX003427

–UN–10FEB95

200 5

A—Drive shaft B—Drive bevel gear

C—Disk pack D—Ring gear

E—Bevel pinion F—Drive pinion

Power flow when moving straight ahead When the tractor is travelling straight ahead, the driven ring gear (D), housing (G) with bevel pinions (E), drive bevel gears (B) and drive shafts (A) all turn at the same speed.

Bevel pinions (E) do not rotate around their own axes.

The two wheels are driven with equal power and at equal speed.

Continued on next page

CTM4820 (01JUL03)

G—Housing

200-5

LX24603,0000296 –19–12NOV01–1/2

Front-Wheel Drive Axles 082903

PN=155

Description and Theory of Operation

LX003428

–UN–10FEB95

200 6

A—Drive shaft B—Drive bevel gear

C—Disk pack D—Ring gear

E—Bevel pinion F—Drive pinion

Power flow when cornering When the tractor is turning a corner, only the driven ring gear and the housing with the bevel pinions rotate at the same speed. As the right wheel - and thus the right drive bevel gear - are stationary, the bevel pinions must idle with the right drive bevel gear. As they do so, they rotate around their own axes. The left drive bevel gear meshes with the rotating bevel pinions. This produces an additional drive for the left drive bevel gear, which normally turns idly with the ring gear when the tractor is moving straight ahead.

G—Housing

As a result, the left drive bevel gear and its associated drive shaft turn twice for every one rotation of the ring gear.

Thus, if the drive wheels have unequal resistance applied to them, the wheel with the least resistance turns faster. As one wheel turns faster, the other turns slower by the same amount.

LX24603,0000296 –19–12NOV01–2/2

CTM4820 (01JUL03)

200-6

Front-Wheel Drive Axles 082903

PN=156

Description and Theory of Operation

Operation of Self-Locking Differential

LX003429

–UN–23FEB95

200 7

A—Drive bevel gear

B—Disk pack

The self-locking differential improves the driving qualities of the machine when operating on rough and slippery ground. The differential effect may be eliminated completely or only partially. It prevents loss in performance caused by slippage at the drive wheels. Compared with a hand or pedal shift differential, the self-locking differential has the benefit that it limits the load on the wheel drive shafts. A further advantage is that during actual operation, it becomes effective immediately and automatically when needed, without any assistance from the operator.

The locking effect is produced by two multiple disk packs (B) positioned symmetrically in the differential housing. Due to reaction forces generated during the transfer of the drive torque, axial forces are produced on the inclined surfaces of bevel pinions (C). These

C—Bevel pinion

axial forces, generated in the splines during torque transfer, exert pressure on the disk packs via drive bevel gears (A), which can move axially along the drive shafts. Since the externally toothed disks engage with the differential housing and the internally toothed disks mesh with the drive bevel gears, relative movement between the drive shafts and differential housing is made more difficult.

The axial forces effect a load-dependent locking torque in the disk packs which is always in direct proportion to the input torque, i.e. the input torque remains proportional to the output torque with a constant locking effect. The locking effect therefore varies to match the changes in engine torque and torque levels in the various gears.

LX,FAXLE 003487 –19–01OCT92–1/1

CTM4820 (01JUL03)

200-7

Front-Wheel Drive Axles 082903

PN=157

Description and Theory of Operation

–UN–10FEB95

Operation of Planetary Drive

LX003430

200 8

A—Drive shaft B—Planetary carrier

C—Planetary gear (3 used) D—Hollow ring gear

E—Wheel hub

The planetary drive is driven by shaft (A). When the drive shaft rotates, planetary gears (C) must turn idly on the teeth of stationary hollow ring gear (D). At the same time, planetary carrier (B) and wheel hub (E) are

F—Knuckle housing

forced to rotate in the same direction as the drive shaft. In this way, the front wheels receive an input at a lower speed but with increased torque.

LX24603,0000349 –19–01JUL02–1/1

CTM4820 (01JUL03)

200-8

Front-Wheel Drive Axles 082903

PN=158

Description and Theory of Operation

Operation of Multi-Disk Brake

LX1030496

–UN–24OCT02

200 9

A—Planetary carrier B—Planetary gear (3 or 4 used)

C—Hollow ring gear D—Disk pack E—Brake piston

F—Oil from/to brake valve G—Spring H—Externally splined disk

Pressure oil (F) flows from brake valve behind front axle brake piston (E) when brake pedals are depressed. Oil pressure forces the brake piston against disk pack (D) thus compressing it. A connection is formed between the externally splined disks (H) which are connected to the stationary hollow ring gear (C) and the internally splined disks (I) which are connected to the universal jointed shaft (J).

I—Internally splined disk J—Drive shaft

and the universal jointed shaft is braked. The braking effect is transmitted to the front wheels via planetary gears (B) and planetary carrier (A).

When the brake pedals are released, oil pressure is decreased and the springs (G) push the brake pistons to their initial position.

With brake pressure increasing, the force exerted on the disk pack by the brake piston increases as well

LX24603,000034A –19–01JUL02–1/1

CTM4820 (01JUL03)

200-9

Front-Wheel Drive Axles 082903

PN=159

Description and Theory of Operation

Positive Front Wheel Lead Check

NOTE: Observe correct positive front wheel lead.

Incorrect front wheel lead causes excessive wear of tires and other components.

1. Check tire inflation pressures.

2. Mark drive flange of front wheel drive axle (A) and the flange of universal jointed shaft (B) (see arrows).

–UN–08FEB95

Positive front wheel lead: 1.5 to 4%

LX003431

200 10

3. Secure universal jointed shaft with a rope as shown.

CAUTION: With tractor running, stay clear of moving parts.

4. Switch on front wheel drive and drive the tractor slowly forward in the lowest gear until the drive flange of the front wheel drive axle has turned 25 times.

NOTE: When the drive flange has turned 25 times, the universal jointed shaft should have turned 25.5 to 26 times, which represents a positive front wheel lead between 2% and 4%. If positive front wheel lead is not correct, check the tire combination (see Operator’s Manual).

LX24603,0000295 –19–01JUL02–1/1

CTM4820 (01JUL03)

200-10

Front-Wheel Drive Axles 082903

PN=160

Index Page

Page

D

A Adjustments Bevel pinion drive shaft, cone point adjustment. . . . . . . . . . . . . . . . . . . . . . . . .

Bevel pinion drive shaft, rolling drag torque adjustment. . . . . . . . . . . . . . . . . . . . . . . . .

Differential bearing preload . . . . . . . . . . . . . .

Preload adjustment at knuckle pin bearings . . . . . . . . . . . . . . . . . . . . . . . . . .

Ring gear, backlash . . . . . . . . . . . . . . . . . . .

Ring gear, load pattern . . . . . . . . . . . . . . . . .

Steering angle. . . . . . . . . . . . . . . . . . . . . . . .

Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tread, basic adjustment . . . . . . . . . . . . . . . .

AutoTrac, steering angle sensor, removing and installing . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Axle housing Exploded view. . . . . . . . . . . . . . . . . . . . . . . .

Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repairing . . . . . . . . . . . . . . . . . . . . . . . . . . .

20-18 20-18 20-34 15-20 20-34 20-34 05-20 05-18 05-16 15-22 20-10 20-39 20-14 20-12 20-13

B Bevel pinion drive shaft Cone point adjustment . . . . . . . . . . . . . . . . . 20-18 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-15 Repairing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-17 Rolling drag torque adjustment . . . . . . . . . . . 20-18 Bolts and nuts, torques. . . . . . . . . . . . . . . . . . . . 01-2

Differential Bearing preload adjustment . . . . . . . . . . . . . 20-34 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 20-8 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-34 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-5 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 20-25 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-24 Ring gear, adjusting backlash . . . . . . . . . . . . 20-34 Ring gear, check load pattern . . . . . . . . . . . . 20-34 Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 20-4 Drive shaft Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 15-5 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 15-8 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-27 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 15-24 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-23

F Fill with oil Axle housing . . . . . . . . . . . . . . . . . . . . . . . . .

Planetary drive . . . . . . . . . . . . . . . . . . . . . . .

Front wheel drive axle, layout . . . . . . . . . . . . . .

Front wheel drive, description. . . . . . . . . . . . . .

20-39 10-29 200-3 200-2

G General Safety and Repair Information. . . . . . . . 01-1

K C Checks Bevel pinion drive shaft, rolling drag torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18 Leaks, multi-disk brake . . . . . . . . . . . . . . . . . 10-28 Positive front wheel lead . . . . . . . . . . . . . . . 200-10 Ring gear, backlash . . . . . . . . . . . . . . . . . . . 20-34 Ring gear, load pattern . . . . . . . . . . . . . . . . . 20-34 Steering angle. . . . . . . . . . . . . . . . . . . . . . . . 05-20 Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-18 Tread, basic adjustment . . . . . . . . . . . . . . . . 05-16 CTM4820 (01JUL03)

King pin, reconditioning . . . . . . . . . . . . . . . . . . 15-11 Knuckle housing Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 15-5 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 15-8 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-15 Preload adjustment at knuckle pin bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 15-20 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 15-11 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-9 Steering angle sensor, removing and installing . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22 Knuckle pin bearings Preload adjustment . . . . . . . . . . . . . . . . . . . . 15-20

Index-1

Front-Wheel Drive Axles 082903

PN=1

Indx 1

Index

Page

Indx 2

Page

L

R

Lubricant Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-11 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-12

Repair Information . . . . . . . . . . . . . . . . . . . . . . . 01-1

S M Mixing lubricants. . . . . . . . . . . . . . . . . . . . . . . . 00-11 Multi-disk brake Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 10-6 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-16 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23 Leak check . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-9 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-17 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17

Self-locking, operation . . . . . . . . . . . . . . . . . . . 200-7 Steering angle sensor, removing and installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22 Steering angle, checking and adjusting . . . . . . 05-20 Steering cylinder Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 05-4 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-12 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . . 05-7 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-6 Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 05-3 Storing lubricants . . . . . . . . . . . . . . . . . . . . . . . 00-12

T O Operation Differential. . . . . . . . . . . . . . . . . . . . . . . . . . .

Multi-disk brake. . . . . . . . . . . . . . . . . . . . . . .

Planetary drive . . . . . . . . . . . . . . . . . . . . . . .

Self-locking differential . . . . . . . . . . . . . . . . .

200-5 200-9 200-8 200-7

P Planetary drive (with multi-disk brake) Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-16 Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-8 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-20 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17 Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 10-6 Planetary drive (without multi-disk brake) Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 10-8 Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-8 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-10 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9 Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 10-4 Positive front wheel lead check . . . . . . . . . . . 200-10 Preload adjustment at knuckle pin bearings . . . 15-20 CTM4820 (01JUL03)

Theory of operation Front wheel drive . . . . . . . . . . . . . . . . . . . . . 200-2 Front-wheel drive axle. . . . . . . . . . . . . . . . . . 200-3 Tie rods Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-5 Tie-rods Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-13 Toe-in, checking and adjusting . . . . . . . . . . . . . 05-18 Torques for bolts and nuts . . . . . . . . . . . . . . . . . 01-2 Tread Basic adjustment check . . . . . . . . . . . . . . . . 05-16 Toe-in, checking and adjusting . . . . . . . . . . . 05-18

W Wheel hub Cross-section (with multi-disk brake). . . . . . . . 10-6 Cross-section (without multi-disk brake) . . . . . 10-4 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-30 Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34 Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-32 Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31

Index-2

Front-Wheel Drive Axles 082903

PN=2