John Deere 730, 733, 740, 745, 750 Front-Wheel Drive Axles Index:

Group 00—Safety Information Check and Adjust Tread (Basic Adjustment) . . . . 05-16
Recognize Safety Information . . . . . . . . . . . . . . . . 00-1 Check and Adjust Toe-In. . . . . . . . . . . . . . . . . . . 05-18
“Important” – Information . . . . . . . . . . . . . . . . . . . . 00-1 Check and Adjust Steering Angle . . . . . . . . . . . . 05-20
“Note” – Information . . . . . . . . . . . . . . . . . . . . . . . . 00-1
Prevent Machine Runaway . . . . . . . . . . . . . . . . . . 00-1 Group 10—Planetary Drive and Wheel Hub
Handle Fluids Safely—Avoid Fires . . . . . . . . . . . . 00-2 Special or Essential Tools. . . . . . . . . . . . . . . . . . . 10-1
Prepare for Emergencies. . . . . . . . . . . . . . . . . . . . 00-2 Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Avoid High-Pressure Fluids . . . . . . . . . . . . . . . . . . 00-3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Remove Paint Before Welding or Heating . . . . . . . 00-4 Planetary Drive and Wheel Hub –
Avoid Heating Near Pressurized Fluid Lines . . . . . 00-4 Sectional View (Without Multi-Disk Brake) . . . . . 10-4
Work In Ventilated Area . . . . . . . . . . . . . . . . . . . . 00-5 Planetary Drive, Multi-Disk Brake and
Wear Protective Clothing. . . . . . . . . . . . . . . . . . . . 00-5 Wheel Hub – Sectional View . . . . . . . . . . . . . . . 10-6
Practice Safe Maintenance . . . . . . . . . . . . . . . . . . 00-6 Planetary Drive – Exploded View (Without
Park Machine Safely . . . . . . . . . . . . . . . . . . . . . . . 00-6 Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Use Proper Lifting Equipment . . . . . . . . . . . . . . . . 00-7 Planetary Drive Removal (Without
Construct Dealer-Made Tools Safely . . . . . . . . . . . 00-7 Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Support Machine Properly. . . . . . . . . . . . . . . . . . . 00-7 Planetary Drive Reconditioning (Without
Work in Clean Area. . . . . . . . . . . . . . . . . . . . . . . . 00-8 Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-10
Illuminate Work Area Safely . . . . . . . . . . . . . . . . . 00-8 Planetary Drive Installation (Without
Service Machines Safely . . . . . . . . . . . . . . . . . . . . 00-8 Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-14
Use Proper Tools . . . . . . . . . . . . . . . . . . . . . . . . . 00-9 Planetary Drive and Multi-Disk Brake—
Service Tires Safely . . . . . . . . . . . . . . . . . . . . . . . 00-9 Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . 10-16
Service Front-Wheel Drive Tractor Safely . . . . . . 00-10 Planetary Drive and Multi-Disk Brake
Dispose of Waste Properly . . . . . . . . . . . . . . . . . 00-10 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Live With Safety . . . . . . . . . . . . . . . . . . . . . . . . . 00-11 Planetary Drive Reconditioning (With
Retighten Wheel Nuts . . . . . . . . . . . . . . . . . . . . . 00-11 Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-20
Mixing of Lubricants . . . . . . . . . . . . . . . . . . . . . . 00-11 Planetary Drive and Multi-Disk Brake
Lubricant Storage . . . . . . . . . . . . . . . . . . . . . . . . 00-12 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Check Multi-Disk Brake for Leaks . . . . . . . . . . . . 10-28
Group 01—General Repair Information Planetary Drive – Fill With Oil . . . . . . . . . . . . . . . 10-29
General Safety and Repair Information . . . . . . . . . 01-1 Wheel Hub – Exploded View . . . . . . . . . . . . . . . . 10-30
Front-Wheel-Drive Axles – Torques for Bolts Remove Wheel Hub . . . . . . . . . . . . . . . . . . . . . . 10-31
and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-2 Recondition the Wheel Hub. . . . . . . . . . . . . . . . . 10-32
Installing the Wheel Hub . . . . . . . . . . . . . . . . . . . 10-34
Group 05—Steering Cylinder and Tie-Rods
Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-1 Group 15—Knuckle Housing and Drive Shafts
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-2 Special or Essential Tools . . . . . . . . . . . . . . . . . . . 15-1
Steering Cylinder and Tie-Rods — Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
Sectional View. . . . . . . . . . . . . . . . . . . . . . . . . . 05-3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
Steering Cylinder and Tie-Rods — Knuckle Housing and Drive Shaft –
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . 05-4 Sectional View. . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
Removing the Tie Rods. . . . . . . . . . . . . . . . . . . . . 05-5 Knuckle Housing and Drive Shaft –
Remove the Steering Cylinder. . . . . . . . . . . . . . . . 05-6 Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Recondition the Steering Cylinder . . . . . . . . . . . . . 05-7 Remove Knuckle Housing . . . . . . . . . . . . . . . . . . . 15-9
Install the Steering Cylinder . . . . . . . . . . . . . . . . 05-12
Install the Tie-Rods . . . . . . . . . . . . . . . . . . . . . . . 05-13 Continued on next page

Recondition the Knuckle Housing and
King Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-11
Install Knuckle Housing . . . . . . . . . . . . . . . . . . . . 15-15
Knuckle Housing — Adjust the Preload at
the Knuckle Pin Bearings. . . . . . . . . . . . . . . . . 15-20
Knuckle Housing — Remove and Install
the Steering Angle Sensor. . . . . . . . . . . . . . . . 15-22
Removing the Drive Shafts . . . . . . . . . . . . . . . . . 15-23
Recondition the Drive Shafts. . . . . . . . . . . . . . . . 15-24
Installing the Drive Shafts . . . . . . . . . . . . . . . . . . 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