TM 9-2330-203-14&P
4-18. SERVICE BRAKE ADJUSTMENT (Con't).
NOTE
Do not adjust brakes when brake drums are hot.
a
MINOR ADJUSTMENT
1.
Raise one end of axle to permit wheel to rotate freely.
2.
M197 and M198:
(a) Press spring lock on slack adjuster worm shaft (1) and turn worm shaft clockwise until wheel cannot be turned
freely by hand.
(b) Back off worm shaft (1) on slack adjuster until wheel turns freely.
(c) Repeat steps 1, 2(a), and 2(b) for other wheel. Make adjustments on each wheel as uniform as possible.
3.
Early Model M197A1 and M198A1:
(a) Turn one of two brakeshoe adjusting studs (2) on rear face of brake mounting plate spider to bring brakeshoe
lining into contact with brake drum.
(b) Turn brakeshoe adjusting stud (2) until brakeshoe lining drags slightly when wheel is turned by hand.
(c) Back off brakeshoe adjusting stud (2) just enough to allow wheel to rotate freely.
(d) Repeat procedure for other brakeshoe adjusting stud (2).
(e) Repeat steps 1 and 3(a) through 3(d) for other wheel. Make adjustments on each wheel as uniform as possible.
4.
Late Model M197A1 and M198A1:
(a) Rotate wheel forward and turn one of two brakeshoe adjusting studs (2) on front brakeshoe forward until
brakeshoe lining contacts brake drum.
(b) Back off brakeshoe adjusting stud (2) enough to allow wheel to rotate freely.
(c) Tap brakeshoe adjusting stud (2) with a light hammer to set adjusting cam and spring. Check adjustment and
repeat if necessary.
TA510683
4-29