TM 9-2320-289-34
6-15.
REAR AXLE DIFFERENTIAL MAINTENANCE (ALL EXCEPT M1009) (Con’t).
NOTE
At this point, side bearings are preloaded. If any additional adjustments
are required, ensure that preload remains as established. If 1 adjusting nut
(8) is loosened, the other must be tightened an equal amount to maintain
this preload.
8.
Mount dial indicator (22) on housing
and measure backlash between ring
gear (4) and drive pinion gear. Rock
ring gear back and forth to measure
backlash.
Backlash
should be
between 0.003-0.012 in.
(0.076-
0.305 mm)
with
(0.1 27-0.203 mm)
NOTE
If adjusting nut
0.005-0.008 in.
preferred,
(8) requires
adjustment, bolts (2 and 5) must
be
loosened.
Once
final
adjustments
have been made,
bolts must be retightened to
proper torque.
9 .
If backlash is more than 0.012 in.
(0.305 mm), loosen right adjusting
nut (8) 1 slot and tighten left adjusting
nut 1 slot. If backlash is less than
0.003 in. (0.076 mm), loosen left
adjusting nut 1 slot and tighten right
adjusting nut 1 slot. Remove dial
indicator (22) from housing.
NOTE
If ring gear (4) and drive pinion were replaced, perform steps 10-13 to
check for proper gear tooth contact pattern.
10.
Wipe any lubricant from housing and clean each tooth of ring gear (4).
11.
Using a medium stiff brush, sparingly apply prussian blue dye to all ring gear (4) teeth. Area of
drive pinion tooth contact should be visible when drive pinion is engaged by hand.
NOTE
Excessive turning of ring gear (4) is not recommended. Ring gear should
be turned only enough to provide tooth contact pattern,
12.
Apply load until it takes a torque of 40-50
companion flange so that ring gear (4) turns
turns 1 full revolution in opposite direction.
Ib.-ft, (54-68 N.m) to turn drive pinion. Turn
1 full revolution, then reverse so that ring gear
TA50588
6-102
