768C TRACTOR & 769C TRUCK POWER TRAIN Caterpillar


Rear Wheel Bearings And Duo-Cone Seals

Usage:

Remove Rear Wheel Bearings And Duo-Cone Seals

Start By:

a. remove rear tires and rims

b. remove final drive ring gear

1. Put tooling (A) in position under the wheel as shown.

2. Install tooling (B) on final drive hub (4). Remove eight bolts (2), retainer (3) and shims (1). Remove hub (4) from the wheel. The weight of the hub is 36 kg (80 lb).

3. Use a lift truck as a support for the wheel assembly as shown. Remove wheel bearing outer cone (5) from axle housing (6).

4. Remove wheel assembly (7). The weight of the wheel assembly is 365 kg (800 lb).

5. Remove wheel bearing inner cone (8) from the axle housing. Remove retainer (9) from the axle housing.

6. Remove Duo-Cone seal (10) from retainer (9). Remove O-ring seal (11) from the retainer.

7. Remove Duo-Cone seal (12) from the wheel.

8. Remove inner bearing cup (13) from the wheel.

9. Remove outer bearing cup (14) from the wheel.

10. Remove Duo-Cone seals (15) and (16) from the brake assembly.

Install Rear Wheel Bearings And Duo-Cone Seals


NOTICE

The Duo-Cone seals must be installed correctly. Refer to the topic "Installation Of Duo-Cone Seals" in this module for the proper handling and installation procedures.


1. Use tool (A) to install the smaller Duo-Cone seal on the brake assembly.

2. Use tool (B) to install the larger Duo-Cone seal on the brake assembly.

3. Install O-ring seal (1) on retainer (2). Use tool (A) to install the Duo-Cone seal on the retainer.

4. Install retainer assembly (2) and bearing cone (4) on axle housing (3).

5. Lower the temperature of bearing cups (5) and (6). Install the bearing cups in the wheel until the bearing cups are against the shoulders in the wheel.

6. Use tool (B) to install the Duo-Cone seal on the wheel.

7. Use a lift truck to put the wheel assembly in position on the axle housing. Install wheel bearing outer cone (7).

8. Install tooling (D) as a support for the wheel assembly. Use tool (C) to put hub (8) in position on the axle housing.

9. Adjust the wheel bearing preload as follows:

a. Measure the thickness of retainers (9).

b. Put retainer (9) in position on the axle housing. Install three bolts (10) equally spaced as shown to hold it. Tighten the bolts evenly to a torque of 70 N·m (50 lb ft).

NOTE: The brakes must be released to turn the wheel assembly. To release the brakes, see the "Towing" topic in Systems Operation, Testing And Adjusting (Air System And Brakes) section of the manual.

c. Turn the wheel, and tighten the bolts again to a torque of 70 N·m (50 lb ft).

d. Use a depth micrometer as shown to measure the distance from the outside of retainer (9) to the end of the axle housing.

e. Find the difference between the measurements in Step a and Step b. The difference is the distance between the end of the axle housing and the inside surface of the retainer.

f. The thickness of shims (11) must be 0.10 mm (.004 in) thicker than the distance found in Step d.

10. Remove the bolts and retainer (9). Install the correct thickness of shims (11) and the retainer with eight bolts. Apply 9S3263 Thread Lock to the eight bolts. Install the bolts, and tighten them to a torque of 250 ± 14 N·m (185 ± 10 lb ft).

End By:

a. install final drive ring gear

b. install rear tires and rims

Caterpillar Information System:

768C TRACTOR & 769C TRUCK POWER TRAIN Final Drive Ring Gear
768C TRACTOR & 769C TRUCK POWER TRAIN Final Drives
768C TRACTOR & 769C TRUCK POWER TRAIN Axles (Rear)
768C TRACTOR & 769C TRUCK POWER TRAIN Rear Tires And Rims
768C TRACTOR & 769C TRUCK POWER TRAIN Body Support (FT1437)
768C TRACTOR & 769C TRUCK POWER TRAIN Body Retaining Pins
768C TRACTOR & 769C TRUCK POWER TRAIN Assembly & Installation Of Conventional Duo-Cone Seals
SUPPLEMENT FOR 772B TRACTOR, 773B TRUCK & 775B QUARRY TRUCK- Engine And Torque Converter
SUPPLEMENT FOR 772B TRACTOR, 773B TRUCK & 775B QUARRY TRUCK- Valve Covers
SUPPLEMENT FOR 772B TRACTOR, 773B TRUCK & 775B QUARRY TRUCK- Engine Front Support
SUPPLEMENT FOR 772B TRACTOR, 773B TRUCK & 775B QUARRY TRUCK- Oil Pump
SUPPLEMENT FOR 772B TRACTOR, 773B TRUCK & 775B QUARRY TRUCK- Crankshaft Front Seal And Wear Sleeve
768C TRACTOR & 769C TRUCK POWER TRAIN Rear Axle Housings
768C TRACTOR & 769C TRUCK POWER TRAIN Drive Shaft (Front)
768C TRACTOR & 769C TRUCK POWER TRAIN Drive Shaft (Rear)
768C TRACTOR & 769C TRUCK POWER TRAIN Torque Converter
768C TRACTOR & 769C TRUCK POWER TRAIN Torque Converter Charging, Scavenge And Brake Retraction Pump
768C TRACTOR & 769C TRUCK POWER TRAIN Lockup Clutch Valve
768C TRACTOR & 769C TRUCK POWER TRAIN Torque Converter Inlet Relief Valve
768C TRACTOR & 769C TRUCK POWER TRAIN Torque Converter Outlet Relief Valve
768C TRACTOR & 769C TRUCK POWER TRAIN Torque Converter Inlet And Outlet Relief Valves
768C TRACTOR & 769C TRUCK POWER TRAIN Transmission Charging Pump
768C TRACTOR & 769C TRUCK POWER TRAIN Transmission Electronic Speed Sensor
768C TRACTOR & 769C TRUCK POWER TRAIN Transmission Hydraulic Control Valves
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