GMC S Series 1994, Руководство по ремонту

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• Production shims are cast iron and are not to be
reused. Measure the production shims and spacers
one at a time and add the measurements together
to obtain the sizes of the left and right shim packs.
• Service spacer thickness is nominal at 4.32 mm
(0.170 inch).
• Service shims are available from 1.02 mm to 2.54
mm (0.040 to 0.100 inch) in increments of 0.101
mm (0.004 inch).
• Make sure the side bearing surfaces are clean and
free of burrs.
1. Place the case with the bearing cups installed into
the axle housing.
A. Lubricate the axle bearings with axle lubricant.
B. Support the case to keep it from falling into the
axle housing.
2. Insert J 22779 between the axle housing and the
left bearing cup (figure 18).
3. Move the tool back and forth in the bore while
turning the adjusting nut to the right until a notice­
able drag is produced (figure 19).
A. Tighten the lock bolt on the side of the tool.
B. Leave the tool in place.
4. Install a service spacer and service shim between
the right bearing cup and axle housing.
5. Determine bearing preload by inserting progres­
sively larger feeler gage sizes between the axle
housing and service shim.
A. Push the feeler gage downward so it contacts
the shim at the top and bottom, and then con­
tacts the axle housing.
B. The point just before additional drag begins is
the correct feeler gage thickness. This is the
zero setting without preload.
6. Remove the strap, J 22779, service spacer, service
shim, feeler gage, and differential case from the
axle housing.
7. Measure J 22779 in three places using a microme­
ter. Average the readings (figure 20).
8. Add the dimensions of the right side service spac­
er, service shim, and feeler gage.
9. For an initial backlash setting, move the ring gear
away from the pinion by subtracting 0.25 mm
(0.010 inch) from the ring gear side shim pack and
adding 0.25 mm (0.010 inch) to the shim pack on
the opposite side.
10. To obtain the proper preload on the side bearings
add 0.10 mm (0.004 inch) to the measurement of
each shim pack.
11. Install the differential. Refer to "Backlash Adjust­
ment."
PINION INSTALLATION
-►4- Install or Connect (Figures 1 and 22 through
30)
Tools Required:
J 5590 Rear Pinion Bearing Cone Installer
J 23911 Pinion Oil Seal Installer
J 8614-01 Pinion Flange Holder
• The bearing cups should have been installed in
“ Pinion Depth Adjustment.”