Model 4700 Maintenance Manual Drive and Brake 8. Remove the drive unit/motor assembly from the tractor as follows: a. Remove the upper front drive unit mounting bolt and install an M14 x 30 threaded rod as shown in Figure 7-16 to support the drive unit/motor assembly. Figure 7-16.
Traction Motor/Drive Unit Removal
Section 7. Component Procedures Drive Unit/Motor Assemblies
Drive Unit Installation 1. Carefully assemble the drive unit to the traction motor. Make sure the pinion and spur gears mesh correctly. 2. Torque the motor to drive unit mounting bolts to 17 ft. lb. (23 Nm). 3. Install the drive unit/motor assembly into the chassis in the reverse of removal. 4. Torque the drive unit to chassis mounting bolts to 100 ft. lb. (135 Nm).
b. Remove the remaining five mounting bolts. Slide the drive unit/motor assembly out of the chassis. c. If the traction motor is to be removed from the drive unit, remove the three bolts attaching the drive unit to the motor. See Figure 7-17. Figure 7-17.
Traction Motor Mounting Bolt Location
Traction Motor Mounting Bolts
When separating the motor from the drive unit, do not damage the gears or O-ring sealing surface in the housing. Cover the opening of the drive unit to prevent contamination while the motor is removed.
Publication 1160093, Issued: 20 May 2013
7-23
