Chevrolet 10 Series 1968, Service Manual

Page: 182 / 713

REAR SUSPENSION AND DRIVE LINE 4-13
COMPONENT PARTS REPLACEMENT
SPRINGS
Spring Bushing
Replacement
1. Raise vehicle frame to remove load from spring.
Support frame securely.
2. Remove forward rear wheels and tires.
3. At both springs, remove lubrication fitting from
spring eye pin, remove nut and washer from lock
bolt and tap bolt out of hanger, then drive pin out of
spring and hanger. Jack rear axle if necessary, to
lower front axle so pin will clear brake flange plate.
4. Raise rear axle to bring front spring eye out of
hanger just far enough to clear hanger.
NOTE: On some vehicles it may be necessary
to loosen forward torque nuts and loosen studs in
axle brackets. (See “ Torque Rod Removal” in
this section.)
5. Remove old bushing and install new bushing using
Tool J-8459 as follows (See Figure 33).
a. Install J-8459-4 on J-8459-1, lubricate threads
and insert tool through the bushing. Install
J-8459-3, -2, bearing, washer and nut J-8459-6 in
that order. Use breaker bar to start bushing,
then use impact wrench to draw bushing out of
spring eye.
F ig . 3 3 —Removing and In stalling Spring Eye Bushing
with Tool J-8 4 5 9
b. Remove old bushing from tool and position new
bushing on Tools J-8459-4 and -1. Insert tool
through spring eye and install J-8459-2, bearing
washer and nut J-8459-6 in that order. Tighten
nut to start bushing straight in spring eye, then
use impact wrench to draw bushing into spring
until bushing stops against J-8459-2. Remove
tool.
6. Check pin for slip fit in bushing and ream if neces­
sary, using a standard 1.250" reamer.
7. Repeat steps 4, 5, and 6 at opposite spring.
8. At both springs, align spring eye in hanger, install
pin so slot in pin lines up with lock bolt holes in
hanger and install lock bolt so wedge mates with slot
in pin. Install lock bolt washer and nut.
9. Install wheels and tires. Lower vehicle to ground
and, with vehicle at curb weight, tighten torque rod
nuts to 300 ft. lbs.
Spring
Rem oval
Refer to Figure 34.
1. Remove rebound bolt and spacer from bottom of
spring rear hanger.
2. Raise vehicle frame to remove load from spring.
Support frame securely.
3. Remove nut and washer from spring eye pin lock bolt
at inside of front hanger and tap out bolt. Remove
lubrication fitting from inner end of pin, then drive
pin out from inner side of hanger, using a brass drift
and hammer.
4. Remove four bolts attaching spring saddle top pad to
spring saddle; hold nuts at bottom while turning bolts
at top.
5. Loosen locknuts on top pad set screws, then loosen
set screws. Lift top pad and locating slide from top
of spring.
6. Lift spring assembly up and rearward to remove
from spring saddle.
Disassem bly
Clamp spring leaves firm ly together, using one “ C”
clamp on each side of center bolt, or use an arbor press.
Remove rebound clip bolts and spacers, then remove
spring center bolt. Release
“ C ”
clamps or arbor press
slowly to avoid possible injury.
Cleaning and Inspection
1. Clean all rust and dirt from spring leaves, using a
wire brush if necessary. Make sure machined sur­
faces of spring saddle are clean.
2. Inspect each spring leaf for cracks or breaks and
replace any that are damaged.
3. Thoroughly clean spring eye pin, making sure lubri­
cant passages are open. Replace pin if excessive
wear is evident.
4. Inspect spring eye bushing for wear. If excessive
wear is evident, replace bushing using Tool J-8459
(See Figure 33).
5. Replace rebound clip bolts or center bolt if damaged
in any way.
CHEVROLET TRUCK SERVICE MANUAL