TM 9-2330-356-14
Brake Wedge Assembly, M967, M969, and
WARNING
M970 except M970 SN TC-0843, TC-0844,
and TC-103 thru TC-178 (Fig. 4-64).
Dry cleaning solvent P-D-680 is toxic and
Always
CAUTION
flammable.
wear protective
goggles and gloves, and use only in l
well-ventilated area. Avoid contact with
Before removing any wedge actuator or at-
skin, eyes, and clothes, and DO NOT
tempting to release spring brake or removing
breathe vapors. DO NOT use near open
a clamp band, block wheels to prevent ve-
flame or excessive heat. The solvent's
hicle movement.
flash point la 1OOF-138F (38C-59C).
If you become dizzy while using cleaning
a.
Removal.
solvent, immediately get fresh air and
medical help. If solvent contacts eyes,
(1) Remove brake air chamber (paras 4-37 and
Immediately wash your eyes with water
4-39),
and get medical aid.
(2) Remove wedge assembly by pulling it straight
Compressed air used for drying or
out of plunger housing.
clearing purposes must not exceed 30 psi
(207 kPa). Wear protective clothing
(goggles and gloves) and use caution to
avoid injury to personnel.
(10) Clean anchor pins, rollers, roller retainers,
spring pins, and brake shoe return spring with dry cleaning
solvent (item 11, Appendix E). Dry the parts with low
pressure compressed air.
(11) Refer replacement of brake linings and
refacing of the drums to direct support maintenance.
d.
Installation.
(1) Install spider bolt, washer, and nut. Do not
tighten (fig. 4-63).
(2) Install spring pins cm brake shoes.
(M967, M969, and M970 except M970 SN TC-0843,
(3) Install rollers and roller retainers on brake
TC-0844, and TC-103 thru TC-178).
shoes.
b.
Inspection.
(4) Place brake shoes into position on brake
spider, and install upper and lower anchor pins and anchor
WARNING
pin washers.
Compressed air used for drying or cleaning
(5) Install anchor pin retaining rings on upper
purposes must not exceed 30 psi (207 kPa).
and lower anchor pins.
Wear protective clothing (goggles and
gloves) and use caution to avoid Injury to per-
(6) Using brake spring pliers, install brake shoe
sonnel.
return spring.
(1) Clean wedge assembly thoroughly with mild
(7) Tighten spider nut and bolt to 100-120 lb.-ft.
soap solution and dry with low pressure compressed air.
e.
Assembly and Adjustment.
(2) Inspect for damaged rubber boot, roller
retaining cage, rollers, or broken spring.
(1) Install wheel and drum assembly (para 4-49).
(3) Replace wedge assembly if damaged or
broken.
(2) Adjust slack adjuster (para 4-34).
Change 3
