TM 9-2330-203-14&P
4-18. SERVICE BRAKE ADJUSTMENT (Con't).
5.
Early Model M197A1 and M198A1:
NOTE
Brake shoes are located vertically on backing plate.
(a)
Rotate brake drum until inspection hole (4) is 1 in. (3.8 cm) from brakeshoe adjusting stud (2) end of rear
brakeshoe.
(b)
Insert 0.020 in feeler gage and turn brakeshoe adjusting stud (2) until a slight drag is felt on feeler gage.
(c)
Rotate brake drum (3) until inspection hole (4) is 1/1 in (3.8 cm) from opposite end of brakeshoe and repeat step
(b).
(d)
Repeat steps (a) through (c) for other brakeshoe.
(e)
Repeat steps (a) through (d) for other wheel Make adjustments on both wheels as uniform as possible.
6.
Late Model M197A1 and M198A1:
NOTE
Brake shoes are located vertically on backing plate.
(a)
Rotate brake drum (3) until inspection hole (4) is 1X in (3.8 cm) from anchor pin (9) end of rear brakeshoe.
(b)
Insert 0.010 in feeler gage between brakedrum (3) and brakeshoe lining.
(c)
Loosen hex nut (8) on anchor pin (9). Hold hex nut with one wrench and turn anchor pin with another wrench until
a slight drag Is felt on feeler gage. Hold this adjustment and tighten hex nut.
(d)
Rotate brake drum (3) until inspection hole (4) is 11 in (3.8 cm) from adjusting stud (2) end of brakeshoe.
(e)
Insert 0.020 in feeler gage and turn adjusting stud (2) in opposite direction of normal forward rotation until a slight
drag is felt on feeler gage.
(f)
Tap head of adjusting studs (2) with a light hammer to set adjusting cam and spring. Check clearance.
(g)
Repeat steps (a) through (f) for other brakeshoe. Turn adjusting stud (2) in direction of normal forward rotation.
(h)
Repeat steps (a) through (g) for other wheel. Make adjustments on both wheels as uniform as possible.
7.
When adjustments are complete, install access cover (5) on each brake drum (3) using new lockwasher (6) and nut
(7).
8.
Install wheel and tire assemblies (para 4-38).
9.
Remove jackstands and jack.
TA510685
4-31
