GMC 1976 ZEO 6083 Maintenance Manual page 173

3C- 1 0 FINAL DRIVE
Figure 20-Spreader Installation
that contact can be made near heel end of tooth. Set
dial indicator so that stem is in line as nearly as
possible with gear rotation and perpendicular to
tooth angle for accurate backlash reading.
4. Check backlash at three of four points around
ring gear . Lash must not vary over .002" around ring
gear .
20 .
NOTE :
Pinion must be held stationary when
checking backlash . If variation is over .002"
check for burrs, uneven bolting conditions or
distorted case and make corrections as neces-
sary .
5. Remove side bearing cap bolts.
NOTE : Bearing caps are of same size and must
be installed in their original position . Mark right
and left bearing caps to identify for reassem-
bling. Keep the original bearing outer races with
their corresponding caps .
6. Install spreader on housing as shown in Figure
NOTE :
Spreader must be modified with Tools
J-22196-7-8.
7 . Turn the spreader screw to expand spreader
until the spacer and shim(s) can be removed from
between the right side bearing and the housing. Re-
tain spacers and shims for reassembly .
NOTE :
Spread housing only enough to relieve
tension on the spacer and shims. The shims may
be removed with Tool J-22608 as shown in Fig-
ures 21 and 22 .
Figure 21-Removing Shims
8. Remove spreader from housing.
9. Remove the spacer and shims, then slide the
case assembly to the left, away from the pinion gear.
Remove case assembly from housing.
10 . Rotate housing so that the pinion is up . .
Check pinion bearing pre-load as shown in Figure
23 . Record the pinion bearing pre-load .
11 . Remove the bearing housing bolts. Remove
the drive pinion and housing as shown in Figure 24 .
Remove housing from drive pinion . Remove "O"
ring seal from bearing housing.
Figure 22-Positioning Tool J-22608