Axle Vent; Axle Shaft - Chevrolet 10 1971 Series Chassis Service Manual

SERIES 10 3300, 3500 LB. CAPACITY AXLES
A N D SERIES 20 5500 LB. CAPACITY AXLES
AXLE ASSEMBLY (EXCEPT 5500 LB. D A N A AXLE)
Construction of the axle assembly is such that service
operations may be performed with the housing installed in
the vehicle or with the housing installed in a holding fix­
ture. The following removal and installation procedure
is necessary only when the housing requires replacement.
All Axle attachments are important at­
NOTE:
taching parts in that they could affect the perfor­
mance of vital components and systems, and/or
could result in major repair expense. They must
be replaced with parts of the same part numbers
or with equivalent parts if replacement becomes
necessary. Do not use replacement parts of
lessor quality or substitute design.
values must be used as specified during re­
assembly to assure proper retention of these
parts.
Removal
1. Raise vehicle on hoist.
2. Support rear axle assembly with suitable lifting
device, so that tension is relieved in springs, tie
rod, and shock absorbers.
3. On vehicles so equipped, disconnect tie rod at axle
housing bracket or at differential carrier.
4. Remove trunnion bearing
companion flange, separate trunnion from flange,
position propeller shaft to one side and tie it to
frame side rail.
Secure trunnion bearings caps to trun­
NOTE:
nion, using masking tape or a large rubber band,
to prevent loss of bearings.
5. Disconnect shock absorbers at lower attachment
points and position out of the way.
6. Disconnect axle vent hose from vent connector and
position vent hose to one side.
7. Disconnect hydraulic brake hose at connector on axle
housing. Remove brake drum, disconnect parking
brake cable at actuating levers and at flange plate.
Refer to Section 5 for cable removal and brake
details.
8. On vehicles so equipped, check coil springs to make
sure that they are compressed; then on all vehicles,
remove axle bolt nuts, " U" bolts, spacers and
clamp plates.
9. Lower axle assembly and remove from vehicle.
Installation
1. Position axle assembly under vehicle and align with
springs or control arms as applicable.
2. Install spacer, clamp plate and
sembly, loosely install retaining nuts to
3. Position shock absorbers in lower attachment brack­
ets and loosely install nut to retain shock.
4. Connect axle vent hose to vent connector at carrier.
5. Connect hydraulic brake hose to connector on axle
housing, connect parking brake cable to actuating
levers. Install brake drum and wheel and tire as­
COMPONENT PARTS REPLACEMENT
Torque
" XJ"
bolts from the axle
bolts to axle as­
bolts.
REAR SUSPENSION AND DRIVE LINE 4-11
sembly--bleed brakes and adjust parking brake as
outlined in applicable portion of Section 5.
6. Reassemble the propeller shaft to companion flange,
making sure that bearing caps are indexed in flange
seat. Install the torque bearing cap retaining nuts to
specifications.
7. Position vehicle so that weight is placed on suspen­
sion c o m p o n e n t s
specifications.
8. Lower vehicle and remove from hoist.

AXLE VENT

Replacement
The axle vent system consists of the vent connector,
vent hose and associated attaching parts. When replacing
vent hose make sure that it is routed along original path
in such a manner that the hose is free from kinks or
binds that would restrict air flow. In replacing the vent
connector; pry old connector from carrier, being sure
that entire connector is removed. Tap new connector into
carrier with a soft-faced hammer, prick punch around
edge of hole to insure fit of new connector (fig. 30).
AXLE SHAFT (EXCEPT 5500 LB. D A N A AXLE)
Removal
1. Raise vehicle on hoist. Remove wheel and tire as­
sembly and brake drum.
2. Clean all dirt and foreign material from area of
carrier cover.
3. Loosen carrier cover-to-carrier bolts slightly to al­
low lubricant to drain from carrier. Remove carrier
cover and gasket.
4. Remove the differential pinion shaft lockscrew and
the differential pinion shaft (fig. 18).
5. Push flanged end of axle shaft toward center of
vehicle and remove " C" lock from button end of
shaft.
6. Remove axle shaft from housing, being careful not to
damage oil seal at end of housing.
Fig. 18— Differential Pinion Shaft Removal
and torque affected parts to
CHEVROLET TRUCK SERVICE MANUAL