TM 9-2330-235-14&P
4-41. HUB, WHEEL BEARING, AND BRAKEDRUM MAINTENANCE (M390C) (Con't).
c. ASSEMBLY AND ADJUSTMENT
1. Install bearing cups (12 and 14) in hub (13). Ensure that bearing cups are squarely seated.
2. Install backing plate (5) on brakedrum (3) with 16 bolts (6), flatwashers (2), and nuts (1).
3. Install brakedrum (3) on hub (13) with six bolts (7) and nuts (4).
4. Pack inner and outer bearings (11 and 15) with grease in accordance with TM 9-214.
5. Apply a thin coat of lubricating oil to inside of hub (13) and outside of spindle (8).
6. Install spacer (9) and new oil seal (10) on spindle (8). Flange on spacer should face inside of trailer.
7. Install inner bearing (11) on spindle (8) with larger diameter facing inside of trailer. Inner bearing may be tapped
gently with a hammer and wooden block, keeping it square with spindle to force it into position.
8. Install hub (13) and brakedrum (3) on spindle (8).
9. Install outer bearing (15) with large diameter facing outward.
10. Install nut (16). While rotating hub (13) and brakedrum (3), tighten nut until a distinct drag is felt. Loosen nut until
hub and brakedrum turn freely.
11. Install new keywasher (17) and outer bearing nut (18). While rotating hub (13) and brakedrum (3), tighten nut
until a distinct drag is felt. Loosen nut until hub and brakedrum turn freely.
12. Bend one tab on keywasher (17) against flat on nut (16). Bend one tab on keywasher against flat on nut (18).
13. Pack hub (13) with grease.
14. Install new gasket (19) and hubcap (20) with three new lockwashers (21) and screws (22).
4-100
