4-48. HUB, WHEEL BEARINGS, AND BRAKEDRUM MAINTENANCE (Cont).
CLEANING AND INSPECTION
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 frame or excessive heat.
The solvents flash point is 100°F-138°F (38°C-59°C). 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.
Clean all parts thoroughly with dry cleaning solvent.
Inspect inner and outer bearings and inner and outer bearing cups (8 and 10) in accordance with TM 9-214. If
inner and outer bearing cups need replacing, drive out of hubs with brass drift or punch.
Position inner and outer bearing cups (8 and 10) in hub (9), with large diameter facing outward. Drive inner and
outer bearing cups in hub until seated, using soft faced hammer, brass drift, or wood block.
Inspect inside diameter of brakedrum for out-of-round condition or scoring.
Replace all defective parts.