REASSEMBLY (cont) - TM-9-2320-285-24-20642

TM 9-2320-285-24-2

4-5. DIFFERENTIAL (CONT)

STEP

LOCATION

ITEM

ACTION

REMARKS

REASSEMBLY (cont)

b. Shims (41 and

Adjust back-

Adjust to 0.020-0.026 inch. To

(cont)

52)

lash

move drive gear (40) away

from drive pinion (28), take

shims (41) from pack under

cross shaft bearing cage

(37) and add to pack under

cross shaft cover (51). To

move drive gear (40) toward

drive pinion (28), switch

shims in opposite direction.

Remove dial indicator

NOTE

Used gear sets develop wear patterns. Do not adjust backlash too close, or wear patterns will overlap. Check by

rotating drive gear (40). If there is overlap, rotation will be rough. Adjust backlash to get smooth rotation. New gear

sets should rotate smoothly within backlash specification.

Gear tooth

a. Drive gear

Paint and

Coat about 12 teeth with mix-

contact

teeth

check

ture of red lead and linseed

check

tooth

oil. Rotate drive gear (40)

contact

through one complete revolu-

tion in each direction. Com-

pare tooth pattern against

following

b. Shims (29,

Adjust gear

If necessary. To move drive

41, and 52)

tooth

pinion (28) away from drive

contact

gear (40), add shims (29)

under bearing cage (25). To

move drive pinion toward

drive gear, remove shims

from bearing cage. See step

38b to move drive gear (40)

away from or toward drive

pinion (28). Obtain correct

tooth contact pattern with-

out changing backlash. See

step 29

4-161