Chevrolet 70 1969 Series, Shop Manual

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REAR SUSPENSION 4B-24
5. Inspect spring. Replace bushing and repair
or replace spring unit if worn or damaged.
SPRING L E A F R E P L A C E M E N T
N O T E : Auxiliary springs should be disassem­
bled in an arbor press. When assembling springs,
make sure spacer is installed between the auxil­
iary and main spring.
1. Mark one side of spring assembly to assure
original position of springs when assembling.
2. Place spring in a vise and remove spring
clip, bolt, nut, and spacer.
3. File peened end of center bolt and remove
center bolt nut.
4. Open vise slowly and carefully to let spring
assembly expand. Wire brush and clean spring
leaves.
5. Replace weak or broken spring leaf.
6. Align center holes in springs using a long
drift.
7. Compress spring leaves in a vise, then re­
move drift and install a new center bolt.
8. Install nut on center bolt and tighten securely
Peen end of bolt to prevent nut from loosening.
9. Align springs by tapping with a hammer and
install spring clip, bolts, spacers, and nuts.
SPRING E Y E RUBBER BUSHING R E P L A C E M E N T
(W IT H RADIUS L E A F R E M O V E D )
Remove and replace radius leaf eye bushing
using bushing remover and installer (J-21058) as
shown in figure 5.
R E A R SPRING IN S T A L L A T IO N
1. Set spring assembly and tapered shim or
spacer (if used) at axle pad with radius rod leaf
toward bracket having spring eye pin or bolt hole.
IM P O R T A N T : Tapered shim must be installed
on axle in same position that was noted at removal.
N O T E : If auxiliary springs are used, place
spring assembly and spacer in position.
2. Install U-bolt spacer over center bolt on
top leaf of spring.
3. Seat U-bolts in spacer and secure spring
to axle by installing anchor plate and nuts on U-
bolts. Tighten nuts to torque listed in "Specifica­
tions" at end of this section.
4. Lower frame until end of spring enters
hanger and top of spring touches cam surface of
hanger.
5. Compress radius leaf with a C-clamp until
radius leaf eye and hanger holes are aligned.
Figure 3 — Removing or Installing Rebound Pin (Typical)
а. Insert radius leaf retainer bolt through
leaf and hanger. Tighten bolt to torque listed in
“ Specifications.”
б. Remove C-clamp from, radius leaf, lower
vehicle, and install rebound pin at front and rear
hangers. Install rebound pins with lock groove
flush with surface of brackets, install locks, and
secure with lock bolt. Bend tab of lock over flat of
retaining bolt.
7. On vehicles using shock absorbers, connect
lower end of shock absorber to bracket and tighten
nut to torque listed in "Specifications" at end of
this section.
8. Remove blocking and lower frame to place
weight on springs. Check U-bolt nuts for proper
torque. Refer to "Specifications" at end of this
section for torque.
Figure 4 — Removing Radius Leaf Pin With Slide
Hammer and Adapter
CHEVROLET SERIES 7 0 8 0 H EAVY DUTY TRUCK SH O P M A N U A L