Chevrolet 1980 Light Duty Truck Service Manual page 338

4B-14 REAR AXLE
Fig. 4B-1 5--Removing Lock Screw
7. When installing C-locks keep the pinion shaft
partially withdrawn. Place the C-lock in the same position
shown in figure 4B-17. Carefully withdraw the axle shaft
until the C-lock is clear of the thrust block. When both locks
are installed, install the pinion shaft and lock screw.
Oil Seal/B earing-R eplacem ent Fig. 4B-19
1. Remove oil seal by using button end of axle shaft.
Insert button end behind the steel case of the oil seal, then
pry seal out of bore being careful not to damage seal. If both
seal and bearing are being replaced proceed to step 2.
2. Using J-23689, insert into bore so that tool grasps
behind the bearing. See figure 4B-20. Slide washer against
outside of seal (or bearing) and turn nut finger tight against
washer. Attach Slide Hammer J-2619 and remove bearing
and seal.
3. Back off nut and remove bearing and seal from tool.
4. Lubricate cavity between seal lips with wheel
bearing lubricant and also lubricate new bearing with wheel
bearing lubricant.
5. To reinstall bearing, use J-23690 Installer. Install
bearing until tool bottoms against tube as illustrated in
figure 4B-21.
Fig. 4B-1 6-Positioning Case For Best Clearance
Fig. 4B-1 7--Correct C-Lock Position
6. To install oil seal, place seal on J-21128 and drive
into bore until tool bottoms against end of tube. See figure
4B-22. This tool installs the seal flush with the end of the
tube.
Brake Backing Plate-R eplacem ent
1. Remove brake line at wheel cylinder inlet and
disassemble brake components from flange plate. Refer to
Section 5 for brake disassembly procedure.
2. Remove bolts retaining flange plate to axle, and
remove flange plate.
3. Install new flange plate to axle housing and torque
nuts to specifications.
4. Install brake components on flange and connect
hydraulic line to wheel cylinder inlet. See Section 5 for brake
assembly, bleeding and adjustment procedures.
Fig. 4B-1 8-P us h Axle Sh aft Inward
LIG H T T R U C K S ER V IC E M ANUAL