Chevrolet 1977 light duty truck, Service Manual

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5. Drive cup back against snap ring by using
J-24426, as shown in figure 4B-33.
6. To install inner b earin g cup, use J-24427 on
H andle J-8092. Drive cup into place until it seats against
shoulder o f hub bore.
7. Install new oil seal with J-24428.
D ru m —N o n -D em o u n tab le-T yp e—Fig. 4B-31
Replacement
Construction o f the n o ndem ountable-type hub and
d rum assembly is such that replacem ent cannot be
accomplished with the h u b assembly installed on the
vehicle.
1. Separate the d rum and hub by rem oving the
dru m -to -h u b retaining bolts, hub stud nuts, or by
pressing out the wheel studs, as applicable.
2. Position brake d rum to hub assembly, m aking
certain that all drain holes are in alignment.
3. Apply a light, even coating o f sealing compound
to the hub oil deflector contact surface, and position
deflector to drum.
4. Install dru m -to -h u b retaining bolts, hub stud
nuts, o r press wheel studs into drum , as applicable.
W heel Bolt
Replacement
W heel bolts are serrated and may also be swaged in
place; however, replacem ent procedure rem ains the same
for both types o f installation.
Press bolts out o f hub flange and press new bolts
into place, m ak in g sure they are a tight fit. If all bolts
are removed, be sure that hub oil deflector is in position
u n d e r bolt heads. See figure 4B-34.
Installation of Hub and Drum Assembly
1. U s in g a high m eltin g p o in t F.P b e a rin g
lubricant, liberally pack bearings and apply a light coat
on l.D. o f hub b e a rin g contact surface and O.D. o f axle
housing tube.
2. Make sure inner bearing, oil seal, axle housing
oil deflector, and in n e r bearing race and oil seal are
properly positioned.
3. Install hub and drum assembly on axle housing,
exercising care so as not to d am ag e oil seal or dislocate
other internal components.
4. Install thrust washer so that tang on l.D. of
washer is in keyway on axle housing.
5. Install adjusting nut and complete the installa­
tion as directed under "B earing A djustm ent."
BEARING A D J U S T M E N T
Before checking bearing adjustment, make sure
brakes are fully released and do not drag.
Check bearing play by grasping tire at top and
pulling back and forth, or by using a pry b a r under tire.
If bearings are properly adjusted, m ovem ent o f brake
d rum in relation to brake flange plate will be barely
noticeable and wheel will turn freely. If m ovem ent is
excessive, adjust bearing as follows:
1. Remove axle shaft and raise vehicle until wheel
is free to rotate.
2. Disengage tang o f retainer from locknut and
remove both locknut and retain er from axle housing
tube.
3. Using .1-2222, tighten in n e r adjusting nut to
specified torque at the same time rotating h u b to make
sure all bearing surfaces are in contact. T h e n back off
inner nut to specified am ount o f turn-back.
See figure 4B-35, and refer to Specifications Section
for torque values.
4. Install ta n g e d re ta in e r ag ain st the in n e r
adjusting nut. Align inner adjusting nut so short tang o f
retainer will engage nearest slot on inner adjusting nut.
5. Install outer locknut an d tighten to correct
specified torque. T hen bend long tang o f retain er into
IN S T A L L A T IO N R E M O V A I