4-36. HUB, WHEEL BEARING, AND BRAKEDRUM MAINTENANCE (M416) (Con't).
CLEANING AND INSPECTION
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.
Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame or
excessive heat. The solvent's flash point is 100F-130F (38C-59C). If you
become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts eyes, immediately wash your eyes and get medical aid.
If inner and outer bearings need replacing, inner and outer bearing cups must also
Clean all removed parts with dry cleaning solvent and dry thoroughly.
Clean and inspect bearings and bearing cups in accordance with TM 9-214.
Replace any damaged part.
Install hub (7) on brakedrum (2) with 5 shoulder bolts (1).
Install inner and outer bearing cups (5 and 8) squarely into hub (7) until fully seated.
Pack inner bearing (4) with grease and install in hub (7).
Install new oil seal (3) in hub (7).
Install hub (7) and brakedrum (2) assembly on spindle (15).
Pack outer bearing (9) with grease and install in hub (7).
Install keywasher (10) and nut (11) on spindle (15). Do not tighten nut.
WHEEL BEARING ADJUSTMENT
Inner and outer bearings (4 and 9) are adjusted properly when there is almost no
noticeable movement between brakedrum (2) and top edge of brake backing plate
when hub rocks on spindle (15) and turns freely.
Tighten nut (11) until a slight drag is felt when hub (7) and brakedrum (2) are rotated.