Chevrolet 1977 light duty truck Service Manual page 295

Upper Control Arm Inner Pivot Shaft a n d /
or Bushing R eplacem ent
CIO, G10-20 (Rubber Bushings)
Removal (Fig. 3C -22)
1. Remove the upper
preceding procedure and m ount the control arm in a
vise.
2. Install remover J-24435-l, receiver J-24435-3
and " C " clamps J-24435-7 as shown in Figure 3C-22.
3. Tighten the clamp to draw out the old bushing.
Discard old bushing.
4. The pivot shaft may now be removed from the
control arm assembly.
5. Reposition the control arm in the vise and
repeat the removal procedure on the rem aining bushing.
Bushing Installation
1. Again using " C " clamp J-24435-7 and installers
J-24435-4 (outer) and J-24435-5 (inner) tighten clamp to
install bushing onto control arm.
2. Install pivot shaft into inside d iam eter of first
installed bushing.
3. Install rem ain in g bushing as shown in Figure
3C-23 and described in step 1.
4. Remove tools and install control arm on vehicle
following p ro c e d u re described
fasteners to proper specifications.
Upper Control Arm Installation
CAUTION: See C A U T IO N on page 1 o f this
section regarding the fasteners referred to in
steps 1, 2 a nd 3.
N OTE: W hen installing the upper control arm be
sure to position the special aligning washers to the
pivot shaft with concave and convex sides together.
J - 2 4 4 3 5 - 7
J - 2 4 4 3 5 - 3
J— 2 4 4 3 5 - 1
control arm using the
below. Torque all
1. Place control arm in position on bracket and
install nuts. Before tightening nuts, insert caster and
cam ber shims in the same order as w hen removed.
Torque the nuts to specifications.
NOTE: A normal shim pack will leave at least two
(2) threads o f the bolt exposed beyond the nut. If
two (2) threads cannot be obtained: Check for
dam aged control arms and related parts. Difference
between front and rear shim packs must not exceed
.30 inches. F ron t shim pack must be at least .24
inches.
Always tighten the thinner shim packs' nut first for
im proved shaft to fram e clam ping
torque retention.
2. Insert ball jo in t stud into steering knuckle and
install nut. Torque stud nut to specifications and install
cotter pin.
3. Install brake caliper assembly if removed (see
section 5).
4. Remove adjustable support from under lower
control arm. Install wheel and tire assembly.
5. Lower the vehicle to the floor.
LOWER C O N TR O L ARM ASSEMBLY
Removal
1. Raise vehicle on hoist and remove spring as
outlined under spring removal.
N OTE: Support the inboard end o f the control arm
a fter spring removal.
2. Remove cotter pin from lower ball stud and
loosen stud nut one turn.
3. Install Ball Stud
large cup end of the tool over the upper ball stud nut
and piloting the threaded end of tool on end o f the lower
ball stud. Extend bolt from Tool J-23742 to loosen lower
force and
Rem over J-23742, position