TM 9-2330-235-14&P
4-41. HUB, WHEEL BEARING, AND BRAKEDRUM MAINTENANCE (M390C).
This Task Covers:
a. Disassembly
c
Assembly and Adjustment
b. Cleaning and Inspection
Initial Setup:
Equipment Conditions:
Materials/Parts:
Wheel removed (para 4-39).
Grease (Item 7, Appendix E)
Lubricating oil (Item 10, Appendix E)
Rags (Item 12, Appendix E)
Dry cleaning solvent (Item 13, Appendix E)
Tools/Test Equipment:
One gasket
One keywasher
General mechanic's tool kit
Three lockwashers
Common no. 1 shop set
Wheel bearing adjusting socket wrench
One oil seal
References:
TM 9-214
a. DISASSEMBLY
WARNING
DO NOT handle brakeshoes, brakedrums, or other brake components unless area
has been properly cleaned. There may be asbestos dust on these components
which can be dangerous If you touch it or breathe it. Wear an approved filter mask
and gloves. Never use compressed air or a dry brush to clean brake components.
Dust may be removed using an Industrial-type vacuum cleaner. Clean dust or mud
away from brake components with water and a wet, soft brush or cloth. Failure to
follow this warning may result in serious illness or death to personnel.
1. Remove three screws (22), lockwashers (21), hubcap (20), and gasket (19). Discard lockwashers and gasket.
2. Straighten tab on keywasher (17) bent over nut (18). Remove nut.
3. Straighten tab on keywasher (17) bent over nut (16). Remove and discard keywasher. Remove nut.
4. Move hub (13) and brakedrum (3) assembly on spindle (8) to loosen outer bearing (15). Remove outer bearing.
5. Carefully remove hub (13) and brakedrum (3) from spindle (8), taking care to prevent inner bearing (11) from
falling out.
6. Remove inner bearing (11), oil seal (10), and spacer (9) from either hub (13) or spindle (8). Discard oil seal.
7. Remove six nuts (4) and bolts (7). Separate brakedrum (3) and hub (13).
8. Remove 16 nuts (1), flatwashers (2), and bolts (6) and separate backing plate (5) from brakedrum (3).
9. Remove bearing cups (12 and 14) from hub (13).
4-98
