Chevrolet 10 1971 Series Chassis Service Manual page 124

REAR SUSPENSION AND DRIVE LINE 4-4
4. Support control arm just as in removing bushing,
center new bushing flanged side up over control arm
hole.
5. Place Tool J-8448-1 on top of bushing and, after
carefully seating bushing in tool, press bushing into
arm until flange contacts arm wall.
Installation
All control arm attachments are impor­
NOTE:
tant attaching parts in that they could affect the
performance of vital components and systems,
and/or could result in major repair expense.
They must be replaced with parts of the same
part numbers or with equivalent parts if re­
placement becomes necessary. Do not use re­
placement parts of lesser quality or substitute
design. Torque values must be used as specified
during reassembly to assure proper retention of
these parts.
(Refer to Figure 8)
1. Position bushed end of control arm in pivot yoke be­
tween tunnel and frame, align holes with drift and
insert pivot bolt. Place nut on bolt finger tight.
2. Position clamp inside spring as shown in Figure 9
so that it seats freely on spring end without any
hang-up. Raise control arm to the spring then pass
bolt, with flat washer installed, up through control
arm and clamp. Install lock washer and nut. Torque
to specifications.
3. Place arm adjacent to axle. Pass "11" bolt over axle
and through holes in arm.
4. Place shock absorber bracket on ends of " U" bolt,
install nuts and torque to specifications.
5. Put full weight of unloaded vehicle on the front and
rear suspension, torque control arm pivot bolts to
specifications.
6. Lower vehicle and remove from hoist.
COIL SPRING A N D AUXILIARY LEAF SPRING
(Series C -P IO a n d C20)
Removal
Coil Spring
1. Raise vehicle on hoist.
device under axle.
Place adjustable lifting
Fig. 10— Spring Removal (Series C -P10 and C20)
2. Remove shock absorber bolt from mounting bracket
at control arm.
3. Remove upper and lower clamps from spring by
backing out lower bolt from underside of control
arm, and upper bolt from inside spring (fig. 10).
4. Lower control arm sufficiently to permit removal of
spring.
Auxiliary Spring
1. The auxiliary spring is secured to the frame mounted
retaining bracket by one retaining bolt. Before at­
tempting to remove spring, make sure there is no
load on spring and that spring leaf does not contact
the control arm mounted bumper (fig. 11).
2. Remove cotter pin from spring retaining bolt then
remove nut and remove spring from the frame
bracket.
3. If auxiliary spring contact bumper is to be removed,
support vehicle at rear axle, remove "U " bolts and
remove bumper from its position on the control arm.
Installation
Coil Spring
1. Place spring clamp inside spring. Position clamp so
that the end of the spring coil is within the area of
Fig. 11— A u x ilia ry Rear Spring (Series C 1 0 -2 0 )
10-30 CHEVROLET TRUCK SERVICE MANUAL