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FRONT SUSPENSION 3-15
4. Insert Spring Compressor J- 6874- 4- 5 with Adapters
J-6874-8-9 into upp^r spring tower so that lower
M
U" bolt fits into shock absorber mounting holes in
spring seat (fig. 23). Secure the two lower studs to
the spring seat with nuts.
5. Fit the tool upper pilot to top of spring and compress
spring by tightening upper nut (fig. 24). Compress
spring until screw is bottomed out.
6. Remove lower spring seat retaining nuts, lift spring
and seat assembly from control arm and guide it
down and out through fender skirt (fig. 25).
Spring Seat Replacement (Fig. 26)
1. Release spring tension and disconnect spring com-
pressor from spring seat.
2. Install new spring seat to spring compressor.
Installation
1. If spring is to be replaced, install new spring into
tool and compress spring until screw is bottomed
out.
NOTE:
Spring coil ends must be against spring
stops in upper and lower seats.
2. Lift spring and tool assembly into place and position
so that the upper spring stop is inboard.
NOTE:
Locating tab on upper spring seat may
be flattened before reinstalling spring.
3. Install lower spring seat to control arm and torque
nuts as shown in the Specifications.
4. Loosen spring compressor until spring is properly
seated in upper spring tower and remove.
5. Install shock abosrber as outlined under Shock Ab-
sorber—Installation in this section.
Corvette
Removal
1. With car on suitable hoist or jack, (support vehicle
by frame so control arms may swing free) remove
wheel and tire assembly, stabilizer bar and shock
absorber. Loosen the lower ball joint to steering
knuckle nut, and the' two lower control arm cross
shaft bushing bolts.
2. Place Tool J-6874-1 across top of sixth coil (ap-
prox.), then loosely secure Tool J-6874-2 to the up-
per shoe, with attaching capscrews and lock washers.
The upper shoe "V" notch and lower shoe raised land
should contact spring.
3. Insert Tool J-6874 up through center of spring and
attach to upper and lower shoe assembly.
4. Position spacers under shock absorber mounting hole
and against bottom of lower control arm. Install
special bearing washer and Tool J-6874-5. Locate
bearing against spacer and large washer against
bearing. Feed screw up through large washer bear-
ing and spacer and thread into Tool J-6874 and
tighten snugly (fig. 22).
5. Center shoe assembly on spring and tighten screw
until a very slight compression is placed on spring
(fig. '22). Then firmly tighten down the two cap-
screws securing the upper and lower shoes to lock
these shoes to spring.
6. Turn head of screw until spring is compressed just
enough to clear the spring tower, then remove the
lower ball joint to steering knuckle nut (fig. 22).
NOTE:
It may be necessary to assist the
spring out of the spring tower with a pry bar or
a similar tool.
7. Disconnect the lower ball joint from the steering
knuckle and lower the control arm with the com-
pressed spring. Immediately release compression
on spring by backing off long screw. Release spring
and tool and withdraw spring.
CAUTION:
The spring force under compres-
sion is very large. Exercise every safety pre-
caution when performing this operation to see
that individuals and materials subject to damage
are removed from the path of the spring when
the control arm is being lowered. Also, the
compressed spring
be relaxed immedi-
ately after lowering the control arm to reduce
the time of exposure to the large compressive
force.
Installation
1. Position spring with closely coiled end up. Place
Tool J-6874-1 across the top of the sixth coil (ap-
prox.) then loosely secure Tool J-6874-2 to the
upper shoe with attaching capscrews and lock wash-
ers. The upper shoe
M
V" notch and lower shoe
raised land should contact spring.
2. Insert Tool J-6874 up through center of spring and
attach to upper and lower shoe assembly with bolt
and nut.
3. Set spring in its seat on the lower control arm.
4. Position spacers centrally under shock absorber
mounting hole and against bottom of lower control
arm.
Install
bearing, large washer
and Tool
J-6874-5. Locate bearing against spacer and large
washer against bearing. Feed the screw up through
large washer, bearing and spacer and thread into
yoke rod. Tighten snugly, but do not start to draw
down yet
5. Center the shoe assembly on the spring and tighten
the lag screw until a very slight compression is
placed on spring, then firmly tighten down the two
capscrews securing the upper and lower shoes. This
will lock the shoes to the coil spring.
6. Turn head of screw until spring is compressed just
enough to clear the spring tower.
NOTE:
It may be necessary to assist the
spring into the spring tower with a pry bar or
similar tool.
7. Immediately install the lower ball joint into steering
knuckle and secure in place with attaching nut.
8. Release compression on spring and at the same time
use a drift to guide the coil spring into its proper
seat. End of coils must be 3/8" from coil stops in
spring seat.
9. Tighten the lower ball joint to steering knuckle nut
and lock with cotter key.
10. Install shock absorber and stabilizer bar.
11. Install wheel, tire and drum assembly.
12. Remove car from hoist or jack stands.
13. Tighten the two lower control cross shaft bushing
bolts to 45-55 lbs. ft. torque.
NOTE:
If a suitable adjustable jack-stand is
CHEVROLET CHASSIS SERVICE MANUAL
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