GMC 1982 Light Duty Truck Service Manual page 447

Fig. 4B2-4--Removing Outer Bearing and Cup
3. E xam in e axle sh aft flange studs, wheel studs, hub
splines, hub bore, and tapped holes for evidence of
dam age. Clean up th re a d s or replace parts where
required.
4. E x am ine oil seal sleeve for evidence of wear or
roughness, check axle housing oil deflector and brake
drum oil deflector for evidence of damage. Replace
parts where required.
5. Examine brake drum for excessive scoring and other
damage. To replace brake drum refer to "B rake Drum
R eplacem ent."
6. Immerse bearing cone and roller assemblies in cleaning
solvent. Clean with stiff brush to remove old lubricant.
Blow bearings dry with compressed air, directing air
stre a m across bearing. Do not spin bearings while
blowing them dry.
7. Thoroughly remove all lubricant from axle housing
tube and from inside the hub, wipe dry. M ake sure all
particles of gasket are removed from outer end of hub,
axle shaft, and hub cap.
8. Scrape old sealing compound out of oil seal bore in the
hub.
B earing /C u p -ln s ta lla tio n
. Place bearing into hub.
1 outer
2. Install cup of outer bearing into hub by using Handle
J-8 0 9 2 and J-8608,
J-8608 is upside down on driver handle, so that chamfer
does not contact bearing cup.
3. Drive cup the snap ring groove.
beyond
4. Using a pair of pliers, install snap ring into its groove.
5. Drive cup back against
shown in figure 4B2-4.
6. To install bearing cup, use J-24427 on Handle
inner
J-8092. Drive cup into place until it seats against
shoulder of hub bore.
7. Install new oil seal with J-24428.
in stalled upside-dow n. Be sure
snap ring by using J-24426, as
D rum -N on -D em oun table-Type-Fig. 4 B 2 -2
R eplacem ent
C onstruction of the nondem ountable-type hub and
dru m assem bly is such th a t replacem ent c annot be
accomplished with the hub assembly installed on the vehicle.
1. Separate the drum and hub by removing the drum-to-
hub retaining bolts, hub stud nuts, or by pressing out
the wheel studs, as applicable.
2. Position brake drum to hub assembly, making certain
that all drain holes are in alignment.
3. Apply a light, even coating of sealing compound to the
hub oil deflector contact surface, and position deflector
to drum.
4. Install drum -to-hub retaining bolts, hub stud nuts, or
press wheel studs into drum, as applicable.
W h e el Bolt
R eplacem ent
Wheel bolts are serrated and may also be swaged in
place; however, replacement procedure remains the same
for both types of installation.
Press bolts out of hub flange and press new bolts into
place, making sure they are a tight fit. If all bolts are
removed, be sure that hub oil deflector is in position under
bolt heads. See figure 4B2-5.
Installation of Hub and Drum Assem bly
1. Using a high m elting point E P bearing lubricant,
liberally pack bearings and apply a light coat on I.D. of
hub bearing contact surface and O.D. of axle housing
tube.
2. Make sure inner bearing, oil seal, axle housing oil
deflector, and inner bearing race and oil seal are
properly positioned.
3. Install hub and drum assembly on axle housing,
exercising care so as not to damage oil seal or dislocate
other internal components.
4. Install thrust washer so that tang on I.D. of washer is in
keyway on axle housing.
R E M O V A I
Fig. 4B2-5--Wheel Bolt Replacement
REAR A X L E 4 B 2 -3