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TM 9-2320-285-24-2
4-5. DIFFERENTIAL (CONT)
STEP
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (cont)
29
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.
30
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

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