4-54. SERVICE BRAKE ADJUSTMENT (DUAL WHEEL CYLINDERS) (Con't).
Always check wheel bearing adjustment (para 4-69) before adjusting service
brakes. Brakes cannot be properly adjusted unless wheel bearings are properly
DO not adjust brakes when brakedrums are hot.
Remove nut (1), Iockwasher (2), and access cover
(3) from brakedrum (4). Discard Iockwasher.
Rotate brakedrum (4) until inspection hole (5) is
alined with one of the brake adjusting studs (6) on
back of the backing plate (7). Insert a 0.010 in.
(0.25 mm) feeler gage between brakedrum and
brakeshoe lining. Turn adjusting stud until a slight
drag on feeler gage is obtained. Repeat for other
Install access cover (3) and secure with new
Iockwasher (2) and nut (1).
Repeat steps 2 through 4 for other wheel, making
adjustments as uniform as possible.