GMC 1990 Light Truck Repair Manual page 323

Figure 15— installing the Differential Side Bearings
2. Pinion gears (56).
• Position one pinion gear (56) between the side
gears and rotate the gears until the pinion gear
is directly opposite the opening in the case.
• Place the other pinion gear (56) between the
side gears, making sure the hole in both pinion
gears line up.
3. Thrust washers (55).
• Rotate the pinion gears toward the opening just
4. Shaft (52) and bolt (36).
5. Ring gear (37) onto the differential case (35).
J 33790
6. Bolts (34).
7. Side bearings (33), using J 33790 (figure 15).
F1785
Tool Required:
1. Bearing cup (41) into the case using J 33837-1,
2. Bearing cup (39) into the case using J 33837-1,
Tools Required:
1. Pinion depth is adjusted by selecting a shim (38)
2. Lubricate the inner and outer pinion bearings lib­
3. Hold the pinion bearings in position and install
4. Tighten the dial indicator in this position.
5. Set the button of J 33838 on the differential bear­
6. Rotate the tool slowly back and forth until the dial
7. After the ZERO setting is obtained and verified,
8. The dial indicator reading is equal to the required
9. Remove the tools and bearing cones.
L-VAN FRONT AXLE 4C5-7
enough to permit the sliding in of the thrust wash­
ers.
Important
Always install new bolts. Never reuse the old
bolts.
Tighten
$
• Bolts (34) alternating in progressive steps to 80
N m (60 ft. lbs.).
PINION BEARING CUP
INSTALLATION
Install or Connect (Figures 1 ,2 , 15 and 17)
J 33837 Pinion Bearing Remover and Installer
J 33837-3, and J 33837-4 (figure 16).
J 33837-3, and J 33837-4 (figure 17).
PINION DEPTH ADJUSTMENT
J 33838 Pinion Depth Setting Gage
J 29763 Dial Indicator
of the proper thickness.
erally with axle lubricant.
J 33838 and J 29763 (figure 18). Set the dial indi­
cator at ZERO, then position it in J 33838. Push
the dial indicator downward until the needle
rotates approximately three turns to the right.
ing bore (figure 18).
indicator reads the lowest point of the bore. Set
the dial indicator to ZERO. Repeat the rocking
action of the tool to verify the ZERO setting.
move the tool button out of the differential side
bearing bore (figure 18). Record the dial indicator
reading.
shim size. Example: If the dial indicator reads 0.84
mm in step 8, a 0.84 mm shim is required. Avail­
able shim sizes are listed in " Specifications."