4 - 2 9 . SERVICE BRAKE MAINTENANCE (Con't).
Remove twelve nuts (61) and Iockwashers (62)
from rear of backing plate (10). Discard lock-
Cable ramp Is found on front brakes of all mod-
els and on front and rear brakes of XM1073.
Remove twelve screws (58), cable ramp (59), and
backing plate (10) from axle (60).
b. 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-138F (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.
Clean all parts with dry cleaning solvent. Dry thoroughly.
Inspect all parts for damage. Replace any damaged parts.
Inspect brakeshoe surfaces for cracks, distortion, and excessive wear. Brakeshoe linings should have a
minimum thickness of 1/8 in. (3.2 mm). Replace brakeshoes if cracked or if lining thickness is less than 1/8 in.