Chevrolet 1980 Light Duty Truck Service Manual page 287

J-9519-2
(HIDDEN)
BALL JO INT
REMOVAL
Fig. 3C-30--Ball J o in t Removal
32") for all models, ball joint is worn and should be replaced
(Fig. 3C-29).
Lower-Rem oval
1. Raise vehicle on a hoist. If a frame hoist is used it
will be necessary to support the lower control arm with a
floor stand.
2. Remove the tire and wheel assembly.
3. Remove the lower stud cotter pin and loosen (two
turns) but do not remove the stud nut.
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.
Do not put stress on the brake line flex hose
NOTICE:
or damage to the brake line may result.
7. Install Tools J-9519-10 and J-9519-2 and J-9519-29
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)
See NOTICE on page 1 of this section
NOTICE:
regarding the fasteners referred to in steps 4, 5 and 7.
1. Start the new ball joint into the control arm and
install J-9519-10 and J-10519-16 as shown. Position bleed
vent in rubber boot facing inward.
J-951 9-29
J-951 9-10
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.
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:
regarding the fasteners referred to in steps 2, 3, 4 and
5.
FRONT SUSPENSION
BALL JO IN T
INSTALLATION
Fig. 3C-3 1 — Installing Ball Joint
See NOTICE on page 1 of this section
3C-21
J-9519-16
J-9519-10
LIG H T T R U C K SER V IC E M AN UAL