TM 9-2330-359-14&P
4-31. SERVICE BRAKE MAINTENANCE (Con’t).
d.
ADJUSTMENT
1.
Raise semitrailer until wheel clears ground.
2.
Rotate wheel and turn adjusting screw (15)
counterclockwise until brakeshoes are tight
against brakedrum and wheel will not turn.
3.
Turn adjusting screw (15) clockwise approximate-
ly ~-~ turn until drag is no longer felt when wheel
is turned.
4.
With brakes applied, measure angle between
pushrod (14) and slack adjuster (13). Measure-
ment should be slightly greater than 90°.
NOTE
Perform steps 5 through 10 if angle between pushrod and slack adjuster Is Incorrect. If
correct, service brake Is adjusted and task ends here.
5.
Release brakes.
6.
Remove cotter pin (16), clevis pin (19), and
disconnect clevis (17) from slack adjuster (13).
7.
Loosen pushrod locknut (18) and turn yoke
counterclockwise to increase, or clockwise to
decrease angle.
8.
Position clevis (17) on slack adjuster (13) and
install clevis pin (19).
9.
With brakes applied, measure angle between
slack adjuster (13) and pushrod (14). If angle is
greater than 90°, tighten pushrod locknut(18) and
install cotter pin (16) in clevis pin (19). If angle is
still incorrect, repeat steps 5 through 8 until the
correct angle is obtained.
10.
Repeat steps 2 and 3.
TA508023
4-48
