Chevrolet 30 Series 1967 Service Manual page 168

REAR SUSPENSION AND DRIVE LINE 4-10
Series G10 and G20
Removal
1. Raise vehicle and place stand jacks under frame side
rails. Support axle so that tension and compression
are relieved in spring.
2. Remove spring-to-axle "U" bolts, spacers and clamp
plate.
3. Remove spring eye front bolt and loosen shackle as
required to withdraw shackle lower bolt.
4. Withdraw spring from vehicle--inspect spring and
repair or replace spring as outlined in this section.
Installation
1. Position spring assembly between axle assembly and
underbody so that head of center bolt is indexed in
axle spring seat.
NOTE:
Make sure that spring spacer is prop­
erly positioned under spring and on axle bracket.
2. Position spring-to-axle "U" bolts through lower
spring spacer. Install upper spring spacer and
clamp--loosely install "U" bolt retaining nuts.
3. Position spring to front hanger and rear shackle, in­
stall eye bolts and loosely install eye bolt nuts.
4. With vehicle at curb, tighten "U" bolts to 80 ft. lbs.,
spring front bolt to 80 ft. lbs., and both shackle bolts
to 50 ft. lbs.
Series 40, 50 and 60
Removal
Refer to Figure 27.
CAUTION: Do not jack under radius leaf. If it
is deemed necessary to jack under stress plate,
make sure surface of jack is smooth so as to
avoid nicking stress plate.
1. Straighten tabs on rebound stop pin retainers at front
and rear hangers and remove retainer bolts and re­
bound pins.
2. Install a "C" clamp on radius leaf to relieve load on
spring eye bolt. Remove eye bolt and slowly release
tension on radius leaf.
3. Remove nuts from "U" bolts, remove "U" bolts and
"U" bolt spacer plate from spring.
NOTE:
As an aid in reinstalling spring, note
position of caster shim placed between spring
assembly and axle housing. Record position as
"thick edge forward" or "thin edge forward" as
the position dictates.
4. Remove spring and camber shim from spring seat
and from beneath the vehicle.
5. Inspect spring--replace bushing, repair or replace
spring unit as outlined in this section.
Installation
1. Install spring camber shim making sure shim is po­
sitioned so that it corresponds to shim on opposite
side and that it is as noted in step 3 of "Removal"
procedures.
2. Place spring on shim with center bolt indexed in pad
center hole and spring ends positioned in hangers.
3. Install "U" bolt spacer over center bolt on top leaf of
spring.
4. Seat "U" bolt in spacer and secure spring to axle by
installing anchor plate and nuts on "U" bolts. Torque
nuts alternately and evenly to 300 ft. lbs.
5. Lower frame so that ends of spring enters hanger
and that top of spring touches cam surface of hanger.
Compress radius leaf with a "C" clamp until pivot
bushing and hanger holes are aligned. Insert re­
tainer bolt and torque to 85 ft. lbs.
. Remove "C" clamp from radius leaf, lower vehicle
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and install rebound pins at front and rear hangers.
Install rebound pin locks, secure locks with bolts and
bend tab of lopk over flat of retaining bolt.
Spring Leaf Replacement
1. Place spring assembly in a bench mounted vise and
remove spring clips by bending tabs or if so equipped
remove bolts and spacer of upper portion of 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.
. Remove drift from center hole and install a new
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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.
NOTE: Spring clips should be bent sufficiently
to maintain alignment, but not tight enough to
bind spring action.
F ig . 2 7 - 4 0 , 5 0 , and 60 Spring Removal (Typ ica l)
CHEVROLET TRUCK SERVICE M ANUAL