Chevrolet 70 1969 Series, Shop Manual

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FRONT SUSPENSION 3C-14
Figure S — Removing Rubber-Type Bye Bushing
to hold spring leaves in alignment, but not tight
enough to restrict free movement of leaves.
5. Check for broken or loose spring center
bolt. Replace or tighten as necessary.
6. Inspect the three inner leaf Delrin liners
used on the optional tapered two-leaf spring. If
not in good usable condition, replace. Refer to
"Specifications" at end of this section for thick­
ness of liners. Center liner can be replaced as
directed later under "Center Liner Replacement."
BUSHING R E P L A C E M E N T
Rubber-Type Eye Bushing
Remove and replace front eye bushing using
bushing remover and installer tool set J-21058
as shown in figures 5 and 6.
Plain-Bronze Bushing
Plain bushings are used in spring eyes and
in shackles. Use suitable driver to press or drive
worn bushings out and install new bushings. Bush­
ings must be burnished or reamed to sizes speci­
fied in "Specifications" at end of this section. Test
fit of bolts or pins in respective bushings before
installing springs.
Figure 6— Installing Rubber-Type Bye Bushing
C E N T E R L IN E R R E P L A C E M E N T
(T W O - L E A F SPRING) (Refer to Fig. 7)
After the spring U-bolts are loosened, the two
leaves will generally separate to permit replace­
ment of center liner on the locating nib of lower
leaf. However, if necessary, a flat tapered pry-
bar can be used to separate the leaves.
SPRING L E A F R E P L A C E M E N T
(E X C E P T O P T IO N A L T W O - L E A F TYPE)
1. Mark down one side of springs to assure
original position of leaves, then place spring as­
sembly in a vise or arbor press near center bolt.
2. When bolted type are used, remove rebound
clip, nuts, bolts, and spacers.
3. File off peened end of center bolt, then re­
move nut and bolt.
4. Release vise or arbor press slowly to avoid
possible injury. Separate spring leaves and clean
thoroughly, using a wire brush if necessary.
5. Replace any broken rebound clips by cut­
ting old rivet, and riveting new clip to spring leaf.
6. Replace broken leaf and stack leaves in
correct order, applying a thin film of graphite
grease to each leaf. Align center bolt holes in
spring leaves with long drift, then compress spring
leaves in vise or arbor press.
7. Install center bolt and nut and tighten firm­
ly. Peen end of bolt to prevent nut loosening.
8. Remove spring from vise or arbor press.
Align spring leaves by tapping with hammer. In­
stall rebound clip, spacers, bolts, and nuts; tighten
enough to hold spring leaves in alignment, but not
enough to restrict free movement of leaves.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L