Drive Line; Rear Axle; Shackle Replacement - Chevrolet 10 1971 Series Chassis Service Manual

REAR SUSPENSION AND DRIVE LINE 4-6
4. Remove nut and bolt securing spring to front hanger.
5. Remove "U " bolt retaining nuts, withdraw
and spring plate
attachment.
6. Withdraw spring from vehicle.
7. Inspect spring--replace bushings, repair or replace
spring unit as outlined in this section.
BUSHING REPLACEMENT
1. Place spring on press and press out bushing using a
suitable rod, pipe or tool (fig. 14).
2. Press in new bushing; assure that tool presses on
steel outer shell of bushing.
SPRING LEAF
Replacement
1. Place spring assembly in a bench mounted vise and
remove spring clips.
2. Position spring in vise jaws, compressing leaves at
center and adjacent to center bolt.
3. File peened end of center bolt and remove nut. Open
vise slowly to allow spring assembly to expand.
4. Wire brush and clean spring leaves. Inspect spring
leaves to determine if replacement is required; also
replace defective spring leaf liners at this time.
5. Align center holes in spring leaves by means of a
long drift and compress spring leaves in a vise.
6. Remove drift from center hole and install a new
center bolt— peen bolt to retain nut.
7. Align spring leaves by tapping with hammer, then
bend spring clips into place or install bolts and
spacer if so equipped.
Spring clips should be bent sufficiently
NOTE:
to maintain alignment, but not tight enough to
bind spring action.
General Description.................................................................................. .....
Component Parts Replacem ent......................................................... . .
Series 10 3300, 3500 lb. Capacity Axles and
Series 20 5500 lb. Capacity Axles
Axle Assembly R e m o v a l................................................................ ....
Axle V e n t ......................................................................................... ....
Axle Shaft-Removal .........................................................................
Oil Seal and/or B e a r in g .............................................................. .... 4-12
Brake Flange Backing P la t e ......................................................... ..
Axle Shaft Installation ................................................................ ..
Wheel Bolt Replacement .............................................................. .....
Pinion Flange, Dust Deflector and/or Seal ................................ .....
Positraction Differential Unit on the Vehicle Check ................ ....
5200 Through 11,000 lb. Capacity Axles
Axle Assembly ................................................................................ .....
Removal .........................................................................................
Installation .......................................................................................
Axle Vent ........ . .................................................... ..4-16
" U"
bolts
from spring-to-axle housing

DRIVE LINE

REAR AXLE

Installation
1. Position spring assembly on axle housing. Make sure
spring is in position at both spring hangers.
The shackle assembly must be attached
NOTE:
to the rear spring eye before installing shackle
to rear hanger (fig. 13).
2. Install spring retainer plate and
install retaining nuts, but do not torque at this time.
3. Jack frame as required to align spring and shackle
with spring hangers.
4. Install shackle bolt and nut and again reposition
spring, if necessary to align front eye--install front
eye bolt and nut.
5. Lower vehicle so that weight of vehicle is on suspen­
sion components and torque affected suspension
parts to specifications.
6. Lower vehicle and remove from hoist.

SHACKLE REPLACEMENT

1. Raise vehicle on hoist. Place adjustable lifting de­
vice under axle.
2. Remove load from spring by jacking frame.
3. Loosen spring-to-shackle retaining bolt, but do not
remove.
4. Remove shackle-to-frame bracket retaining bolt--
then remove shackle bolt from spring eye (fig. 13).
5. Position shackle to spring eye and loosely install re­
taining bolt--do not torque retaining bolt at this time.
6. Position shackle to frame bracket and install retain­
ing bolt.
7. Rest vehicle weight on suspension components and
torque both
specifications.
8. Lower vehicle and remove from hoist.
INDEX
Page
4 -7
Axle Shaft (Except 11,000 lb. A x le s ).........................................
4-11
Axle Shaft (11,000 lb. Axles) .......................................................
Hub and Drum ................................................................................
Removal .......................................................................................
4 -1 1 Cleaning ..............................................
4 -1 1
Bearing C u p ...................................................................................
4 -1 1
Demountable Type Drum
Non-Demountable Type Drum . ................................... ..
4 - 1 2 Wheel Bolt ....................................................................... ..
4 - 1 3 Hub S t u d .......................................................................................
4 - 1 3 Oil Sleeve and Bearing Thrust Spacer.......................................
Wheel Hub O il S e a l.....................................................................
4 - 1 3
4 - 1 5 Installation ..................................................................................
Bearing A djustm ent.....................................................................
Drive Pinion O il Seal (Except 5500 lb. D a n a ) ...........................
4 - 1 5
No-Spin Differential U n i t ..............................................................
4 - 1 5
4 - 1 5 On The Vehicle Check
Specifications ......................................................... See Specification Section
" U"
bolts--loosely
s h a c k l e bolt retaining
......................................
...
.......................................................
..............................................................
10-30 CHEVROLET TRUCK SERVICE MANUAL
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