GMC 1982 Light Duty Truck Service Manual page 363

4. Install J-23742 between the ball studs as shown in
Figure 3C-27.
It may be necessary to remove the brake caliper
assembly and wire it to the frame to gain clearance for
tool J-23742. See section 5 for proper procedure.
5. Be sure lower control arm is supported as pointed out in
Step 1. Extend bolt from Tool J-23742 to loosen ball
stud in steering knuckle. When stud is loosened, remove
tool and ball stud nut.
6. Pull the brake disc and knuckle assembly up off the ball
stud and support the upper arm with a block of wood so
that assembly is out of working area.
NOTICE: Do not put stress on the brake line flex hose or
dam age to the brake line may result.
7. Install Tools J-9519-10 and J-9519-2 and J - 9 5 19-29 as
shown in Fig. 3C-30.
8. Turn hex head screw until ball joint is free of control
arm.
9. Remove tools and the ball joint.
Installation (Fig. 3C-31)
NOTICE: See N O T I C E on page 1 of this section
regarding the fasteners referred to in steps 4, 5 and 7.
1. S tart the new ball joint into the control arm and install
J-9519-10 and J - 9 5 19-16 as shown. Position bleed vent
in rubber boot facing inward.
2. Turn hex head screw until ball joint is seated in control
arm.
3. Lower the upper arm and mate the steering knuckle to
the lower ball stud.
4. Install brake caliper assembly if removed (see Section
5).
5. Install ball stud nut and torque as follows. All Series,
110 - 140 N-m (80-100 ft. lbs.) plus additional torque
to align cotter pin hole not to exceed 175 N-m (130 ft.
lbs.) maximum. Never back off to align cotter pin.
6. Install a lube fitting and lube the joint.
7. Install tire and wheel assembly and lower vehicle to
floor.
J-9519-2
(HIDDEN)
BALL JOINT
REMOVAL
Fig. 3C-30--Ball Joint Removal
STEERING KNUCKLE
It is recommended that vehicle be raised and supported
as on a twin-post hoist so that the front coil spring remains
compressed, yet the wheel and steering knuckle assembly
remain accessible. If a frame hoist is used, support lower
control arm with an adjustable jackstand to safely retain
spring in its curb height position.
Removal
1. Raise vehicle on hoist and support lower control arm as
noted above.
2. Remove wheel and tire assembly.
3. Remove caliper as outlined under " Front Wheel Hub -
Removal".
4. Remove disc splash shield bolts securing the shield to
the steering knuckle. Remove Shield.
5. Refer to Section 3B-Steering for service removal
operations.
6. Remove upper and lower ball stud cotter pins and
loosen ball stud nuts. Free steering knuckle from ball
studs by installing Special Tool J-23742. Remove ball
stud nuts and withdraw steering knuckle.
Installation
NOTICE: See N O T I C E on page 1 of this section
regarding the fasteners referred to in steps 2, 3, 4 and
1. Place steering knuckle in position and insert upper and
lower ball studs into knuckle bosses.
Steering knuckle hole, ball stud and nut should be free
of dirt and grease before tightening nut.
2. Install ball stud nuts and tighten nut to specifications.
(See Specification Section.)
If necessary, tighten one more notch to insert cotter
pins. Do not loosen nut to insert cotter pin. Refer to Ball
Joint text for proper nut installation sequence.
3. Reverse rem aining removal procedure, and tighten
splash shield mounting bolt. Tighten two caliper
assembly mounting bolts to 48 N-m (35 ft. lbs.) torque.
4. Adjust wheel bearings as outlined under Front Wheel
Bearing Adjustment.
5. Tighten wheel nuts to 100 N-m (75 ft. lbs.).
J-9519-29
J-9519-10
FRONT SUSPENSION
BALL JOINT
INSTALLATION
Fig. 3 C -3 1 — Installing Ball Joint
3C -21
5.
J-9519-16
J-9519-10