TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 593 of 1207
TM 9-2320-361-20
8-7. SERVICE BRAKESHOES MAINTENANCE (Contd)
b.
C1eaninig and Inspection
1.
2.
3.
4.
5.
6.
7.
8.
WARNING
Eye protection is required when using wire brush for cleaning.
Failure to do so may result in injury to personnel.
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well-ventilated places. Failure to do so may
result in injury to personnel.
Wash all parts, except brakeshoes (2) and (23), in drycleaning solvent and wipe dry with clean rag.
Clean outer brakeshoe side of backing plate (5) with rag saturated in drycleaning solvent and
wipe dry.
Measure top, middle, and bottom thickness of brakeshoes (2) and (23). If minimum thickness is
0.33 in. (8.33 mm) or less, replace.
Inspect backing plate (5) for cracks, breaks, and elongated holes. If backing plate (5) is broken,
cracked, or holes are elongated, replace. If rear axle backing plate (5) is damaged, replace rear
axle housing.
Inspect anchor plate (15) for loose or missing rivets (14). If any rivets (14) are loose or missing,
replace backing plate (5).
Inspect anchor pins (27) for cracks, looseness, and chipped or broken retaining clip slots (26). If
anchor pins (27) are cracked, loose in backing plate (5), or retaining clip slots (26) are damaged,
replace.
Inspect wheel cylinder (7) for cracks, leaks, torn boots (6), and bent or broken pushrods (10). If
cracked, leaking, boots (6) are torn, or pushrods (10) are bent or broken, replace wheel cylinder (7).
Inspect cams (20), springs (19), and adjusting pins (11) for cracks, bends, or breaks. If cracked, bent,
or broken, replace.
Inspect return spring (30) and anti-rattle springs (4) for breaks. bends. or distorted coils. If broken,
bent, or coils are distorted, replace.
c. Installation
1.
2.
3.
4.
5.
6.
7.
Mark ends of new or old anchor pins (27) with center punch indicating highest cam lobe position.
Apply light coat of grease on backing plate (5) where brakeshoes (2) and (23) may rub.
NOTE
Perform steps 3 and 4 if anchor pins and cams have been
removed.
Final tightening of cam nuts and anchor pin nuts is done in
brakeshoe adjustment.
Install felt washers (18), retainer washers (21), and anchor pins (27) on backing plate (5) with two
washers (17) and nuts (16). Do not tighten nuts (17).
Install two adjusting pins (11), springs (19), and cams (20) on backing plate (5). Peen ends of two
adjusting pins (11) securely against cams (20) to hold in place.
Turn anchor pins (27) so that center punch marks (25) are close together.
Set cam (20) so that tip points down.
NOTE
Brakeshoes must be a matched set on both ends of axle.
Install two brakeshoes (2) and (23) on anchor pins (27) against wheel cylinder pushrods (10) and
against backing plate (5) with two retainer washers (22), new lower (short) guide pins (24),
washers (13), and nuts (12).
8-20
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