GMC S Series 1994, Руководство по ремонту

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7. Differential side bearings (18) using J 24429 and
J 8092.
A. Place J 8107 into the differential on the side
opposite of bearing installation to protect the
differential case.
B. Drive the bearing onto the case using J 24429
and J 8092.
8. Differential case (34) to the axle housing. Refer to
“ Side Bearing Preload Adjustment.”
SIDE BEARING PRELOAD ADJUSTMENT
• The differential side bearing preload is adjusted by
two adjusting nuts in the bearing bore. The bore
and the bearing cap provide the mating threads for
the bearing nut.
• The differential must be initially preloaded in order
to determine the backlash of the gear set. After the
backlash has been set, the final bearing preload is
set.
Install or Connect (Figures 1 and 16)
Tool Required:
J 24429 Side Bearing Adjustment Wrench
1. Bearing caps (20) to the bearings in their original
locations.
2. Differential assembly to the housing.
3. Adjusting nuts (19).
NOTICE: Refer to “Notice” on page 4B4-1.
4. Bearing caps (20) and bolts (28) in their original
positions.
A. Assemble the caps finger tight.
B. Loosen the right side adjusting nut and tighten
the left side nut using J 24429 until the ring
gear contacts the drive pinion (figure 16). Do
not force the gears into contact. This is the zero
lash point.
C. Back off the left adjusting nut approximately two
slots to obtain the initial backlash adjustment.
5. Adjusting nut lock (21) and lock bolt (22) to the left
nut.
A. Do not tighten.
B. Tighten the right adjusting nut firmly to force the
case into solid contact with the left adjusting
nut. Rotate the pinion several times to seat the
bearings.
C. Loosen the right adjusting nut until it is free
from its bearing.
D. Tighten the right adjusting nut until it just con­
tacts the bearing. Additionally tighten the nut
two slots for used bearings, or three slots if new
bearings are installed.
&
Tighten
• Bearing cap bolts (28) to 183 N-m
(135 lbs. ft.).
• Measure the ring gear to pinion backlash. Refer to
“ Backlash Adjustment.”
BACKLASH ADJUSTMENT
1. Install a dial indicator to the case using a magnetic
base (figure 17).
2. Place the indicator stem at the heel end of a tooth.
• Set the dial indicator so that the stem is in line
with the gear rotation and perpendicular to the
tooth angle.
3. Check and record the backlash at three or four
points around the ring gear.
• The pinion must be held stationary when check­
ing backlash.
• The backlash should be the same at each point
within 0.05 mm (0.002 inch). If the backlash
varies more than 0.05 (0.002 inch), check for
burrs, a distorted case flange, uneven bolting
conditions, or foreign matter between the case
and the ring gear.
4. The backlash at the minimum lash point measured
should be between 0.125-0.200 mm (0.005-0.008
in c h ). The m axim um a c c e p ta b le re a d in g is
0.076-0.203 mm (0.003-0.008 inch).
5. If the reading is too high, remove the adjusting nut
locks, and loosen the right nut one slot. Then tight­
en the left nut one slot (figure 16).