GMC 1990 Light Truck Repair Manual page 167

Figure 14—installing the Pinion Inner Bearing
PINION INSTALLATION
Install or Connect
Tools Required:
J 22388 Pinion Oil Seal Installer
J 22804-1 Pinion Oil Seal Spacer
J 5590 Rear Pinion Bearing Cone Installer
• The bearing cups should have been installed in
" Pinion Depth Adjustment" in this section.
1. The pinion inner bearing (13) to the pinion.
• Press the bearing onto the pinion until the
bearing cone seats on the pinion shim(s)
(figure 14).
2. A new collapsable spacer (11).
• Lubricate the pinion bearings with axle lubricant.
3. Pinion (15) to the axle housing.
4. Outer pinion bearing (10) onto the pinion using
J 5590.
• Hold the pinion forward from inside the case
while driving the bearing onto the pinion.
5. Pinion oil seal (9) using J 22388 and J 22804-01
(figure 15).
6. The pinion flange (8) to the pinion by tapping it with
a rawhide hammer until a few threads show through
the pinion flange.
7. The pinion washer (7) and a new nut (6) while
holding the pinion flange with J 8614-01 (figure 16).
Tighten
The nut until the pinion end play is just taken
up. Rotate the pinion while tightening the nut
to seat the bearings. Once there is no end play
in the pinion, the preload torque should be
rechecked.
Remove J 8614-01. Using an inch-pound
torque wrench, check the pinion preload by
rotating the pinion with the wrench. Preload
should be at or below 2.3 to 2.8 N-m (20 to 25
in. lbs.) on new bearings, or 1.1 to 1.7 N-m (10
to 15 in. lbs.) for used bearings (figure 17).
If the preload torque is below the preloads
given above, continue torquing the nut in small
increments. Check the preload after each
9V2-INCH RING GEAR 4B3-7