4-30. REAR AXLE - Continued
4-30.3 Hub Assembly.
This task covers
Shop Equipment, Automotive
Maintenance and Repair,
3, Appendix E Antiseize Compound
16, Appendix E Grease
592-A Bearing Cup Inner
572 Bearing Cup, Outer
Main Engine Shutdown (see para. 2-10)
86797 Wheel Bolt
APU Shutdown (see para. 2-12)
99906 Bearing Cone, Inner
Batteries Disconnected (see para. 4-24.12)
34368 Bearing Cone, Outer
88319 Oil Seal
Air Tanks Drained
86478 Stud, 5/8 - 18
Relevant Rear Wheel Removed (see para. 4-23.1)
Axle Oil Drained (see LO 5-4210-220-12)
Relevant Axle Shaft Removed (see para. 4-20 2)
Accidents causing serious or fatal injuries may occur unless the truck is supported by
maintenance trestles. Never rely on hydraulic lacks or mechanical lifting devices for support
Metal particles and debris from a failed component may cause failure of other components.
To reduce the chance of additional axle failures, drain and clean axle housing cavities as
necessary and replace lube oil.
Hub repair is limited to replacement of components. When removing hub, inspect
components, and replace as required. These procedures are common for both left and right
Remove axle shafts as detailed in para. 4-30.2.
Release parking brake as detailed in para. 4-30.4, ADJUSTMENT, step 3.
Remove outer adjusting nut (3) and lockwasher (4).
Using a torque wrench, tighten inner locknut (5) to a torque of 50 ft lb (68 Nm) while rotating the wheel in
both forward and reverse directions. The wheel should turn easily. Back off inner locknut 1/4 to 1/3 turn.
Install lockwasher (4) snug against inner locknut.