GMC 1986 P-Truck Service Manual page 306

3C-20 FRONT SUSPENSION
Figure 20—Installing The Lower Ball Joint
• Extend J-23742 until the lower ball joint (37)
breaks free from the steering knuckle (31).
• Remove the nut (35) and J-23742.
3. Hub/rotor (70) and the knuckle assembly off the
lower ball joint (37).
• Support the upper control arm (28) with a
block of wood to keep it clear of the work
area.
4. Ball joint (37) from the lower control arm (36).
• Install J-21474-13, J-9519-22, J-9519-16, and
J-9519-10 (figure 19).
• Turn the hex head screw until the ball joint is
free of the lower control arm.
• Remove the tools and the ball joint (37).
"► * Install or Connect (Figures 5 through 8, and
20 )
Tools Required:
J-9519-9 Ball Joint Installer
J-9519-10 Ball Joint Fixture
1. Ball joint (37) into the lower control arm (36).
• Start the ball joint into the control arm and
install J-9519-9 and J-9519-10 (Figure 20).
• Position the bleed vent in the rubber boot
facing inward.
• Turn the hex head screw until the ball joint is
seated in the lower control arm.
2. Ball joint into the steering knuckle (31).
• Mate the steering knuckle (31) to the lower
3. Caliper if it was removed.
• Refer to BRAKES (SEC. 5).
NOTICE: Refer to "Notice" on page 3C#1 of
this section.
4. Nut (35).
• Nut (35) to 122 N m (90 ft. lbs.).
5. Cotter pin (34).
• Tighten the nut (35) until the hole in the stud
• Do not tighten more than one flat or 175 N m
5. Fitting (12).
• L u b ric a te
6. Tire and wheel assembly and lower the vehicle to
the floor.
B-07472
9
L
Inspect
The upper ball joint (13) is spring loaded in its
socket. Replace the ball joint if there is any lateral
shake or if it can be twisted in its socket with the
fingers.
The ball joint seals for cuts or tears. Replace the
ball joint if any are found.
+ + Remove or Disconnect (Figures 5 through 8,
and 15)
Tools Required:
• Raise the vehicle on a hoist. If a frame hoist
1. Cotter pin (15) from the upper ball joint (13).
• Loosen the nut (14) two turns, but do not
2. Caliper.
• Refer to BRAKES (SEC. 5).
3. Upper ball joint (13) from the steering knuckle
(31).
• Use J-23742 to separate the upper ball joint
• Nut (14), and lift the upper control arm (28)
4. Ball joint (13) from the upper control arm (28).
• Drill 6.35 mm (1 U inch) deep holes in the
ball joint (37).
Tighten
lines up with the slot in the nut.
(130 ft. lbs.) maximum.
the ball
recommended lubricant.
UPPER BALL JOINT
J-23742 Ball Joint Separator
is used, support the lower control arm with a
floor jack.
remove the nut.
from the steering knuckle (figure 15).
free of the ball joint.
rivet heads using a 3.175 mm (1 /s inch)
diameter drill bit.
jo in t (37) w ith