Axle Vent Replacement; Axle Shaft; Axle Shaft Rem Oval And Installation; Hub And Drum - Chevrolet 10 Series 1968 Service Manual

VENT ASSEMBLY
TO BE INSTALLED WITH
FLAT SURFACE FACING
CENTERLINE OF REAR
AXLE DIFFERENTIAL
HOUSING.
Fig . 8 9 —A x le Vent Replacement
7. Check brake operation. Inspect for air or hydraulic
fluid'leaks at brake line fittings. Road test vehicle.
Axle Vent
Replacement
Service replacement axle housing assemblies are not
equipped with an axle vent; therefore, always make sure
that a new vent assembly is installed when replacing the
housing. If axle vent requires replacement, pry old vent
from housing being sure that entire vent is removed.
Prick punch around carrier hole to insure fit of replace­
ment vent. Tap new vent into housing using a soft-faced
hammer. Vent should be positioned in housing so that
flat surface is toward centerline of differential carrier
(fig. 89).

Axle Shaft

Rem oval and Installation
1. Remove the axle shaft flange-to-hub retaining nuts.
(Refer to Figure 90.)
2. Strike the center of shaft flange with a lead hammer
to loosen flange and dowels.,
3. Remove tapered dowels from studs and pull axle
shaft from housing. In some instances it may be
necessary to spread dowels to permit removal.
4. Thoroughly clean old gasket material from wheel hub
and axle shaft flange, and install a new gasket over
hub studs and against hub.
5. Install axle shaft so that splines are aligned with dif­
ferential side gear and flange holes index over hub
studs.
6. Install tapered dowel over each hub stud. Install and
tighten stud nuts to specifications.
7. Observe that clearance exists between face of stud
nuts and axle shaft flange. If no clearance exists,
this indicates excessive wear at studs, tapered dow­
els, or flange holes— replace worn part if necessary.

Hub and Drum

(Refer to Figure 90)
REAR SUSPENSION AND DRIVE LINE 4-45
Rem oval
1. Remove wheel assembly and axle shaft as specified
under "A xle Shaft Removal and Installation" this
section.
2. Disengage tang of nut lock from flat of locknut, then
remove locknut from housing tube, using an ap­
propriate tool.
3. Disengage tang of nut lock from flat of adjusting nut
and remove nut lock from housing tube.
4. Remove adjusting nut from housing tube.
5. Pull hub and drum assembly straight off axle housing
using care to avoid dropping outer bearing inner
race and roller assembly.
6. Remove oil seal.
NOTE: The hub oil seal should be replaced
whenever the hub is removed for any reason.

Cleaning

1. 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 stream across bearing. Do not
spin bearings while blowing them dry.
2. Thoroughly clean all lubricant off axle housing tube
and out of inside the hub, wipe dry. Make sure all
particles of gasket are removed from outer end of
hub, axle shaft, and hub cap.
3. Scrape old sealing compound out of oil seal bore in
the hub.
Fig . 90—Hub and Drum Details
1 .
A x le Shaft
2. G asket
3. Hub Inner Bearing
Assemble
4.
O il Seal
5. Wheel Bolt
6. Drum
7. Drum -to-Hub Retaining
Bolt
8. O il Deflector
9. Hub O uter Bearing
Assembly
10. Bearing Adjusting Nut
11. Adjusting Nut Lock
12. A djusting Nut Lock Nut
13. Tapered Dowel
14.
A x le -to -H u b Retaining
Stud
15. A x le Sh aft-to -H u b
Retaining Nut
CHEVROLET TRUCK SERVICE MANUAL