Brake Backing P La Te; Pinion Flange (Dust Deflector) - GMC 1982 Light Duty Truck Service Manual

4 B 1 -4 R EAR A X LE
Fig. 4Bl-9--Seal Installation
2. Install axle shaft " C " lock on button end of axle shaft
and push shaft outward so that shaft lock seats in
counterbore of differential side gear.
3. Position differential pinion shaft through case and
pinions, aligning hole in shaft with lock screw hole.
Install lock screw.
4. Using a new gasket, install carrier cover. M ake sure
both gasket surfaces on carrier and cover are clean
before installing new gasket. Torque carrier cover bolts
in a crosswise pattern to ensure uniform draw on cover
gasket.
5. Fill axle with lubricant as specified in Section OB to a
level even with the bottom of filler hole when axle is at
operating tem perature.
6. Install brake drum and wheel and tire assembly.
7. Lower vehicle and remove from hoist.
Brake Backing P late-R eplacem ent
1. Remove b rake line at wheel cylinder inlet and
disassemble brake components from flange plate. Refer
to Section 5 for brake disassembly procedure.
TOOL J -6 6 2 7
or J -5 5 0 4
Fig. 4B1-10--Pressing Out Wheel Stud
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.
W heel Bolt-R eplacem ent
1. Raise vehicle on hoist allowing axle to hang freely.
2. Remove wheel and tire and brake drum.
3. Using Tool J-5504 or J-6627 press out stud as shown in
figure 4B1-10.
4. Place new stud in axle flange hole. Slightly start stud
serrations in hole by firmly pressing back of stud with
your hand.
5. Install a lug nut with flat side first (tapered face
outboard). Tighten on lug nut drawing stud into flange
until stud head is bottomed on back side of flange.
6. Remove lug nut.
7. Reinstall brake drum and wheel and tire.
8. Lower vehicle and remove from hoist.
P IN IO N FLANGE, DUST DEFLECTOR
A N D /O R OIL SEAL
Removal
1. Raise vehicle on hoist.
2. Disconnect propeller shaft from axle.
3. Position propeller shaft to one side and tie it to frame
side rail.
4. Measure the torque required to rotate the pinion, as
shown in figure 4B1-11. Record the torque for later
reference.
5. Scribe a line down pinion stem, pinion nut, and flange
to aid on reinstallation. M ak e sure lines show the
relationship of components accurately. C ou nt the
number of exposed threads on pinion stem, and record
Fig. 4B1-11--Measuring Pinion Rotating Torque