Lower Control A - GMC 1986 P-Truck Service Manual

Do not allow the upper control arm (28) to
swing too far from the frame crossmember.
Im portant
• Install a chain over the upper control arm
(28) inboard of the stabilizer bar (59) and
outboard of the shock absorber (20), to
retain the upper control arm in a close
relationship to the frame crossmember.
4. Pivot shaft (29) and bushings (26).
• Grease fitting (12).
• Unscrew the bushings (26).
• Slide the pivot shaft out of the upper control
arm. Remove and discard the inner seals
(between the bushings and the pivot shaft).
4 Install or Connect (Figures 6 through 8, and
+ -
30)
1. Pivot shaft (29), seals, and bushings (26) onto the
upper control arm (28).
• New inner seals onto the pivot shaft.
• Slide the pivot shaft into position inside the
upper control arm. Screw on the new
bushings. Do not tighten.
Im portant
The pivot shaft (29) must be centered in the
upper control arm (28) as shown in figure 30.
Tighten
• Bushings (26) to 257 N m (190 ft. lbs.).
FRONT SUSPENSION 3C-27
L*
Inspect
• Pivot shaft for free rotation.
2. Grease fitting (12).
• G rease the b u s h in g s (29). R efer to
MAINTENANCE AND LUBRICATION (SEC.
OB).
NOTICE: Refer to the " N otice" on page 3C-1
of this section.
3. Pivot shaft (29) to the frame.
• Bolts (4), shim packs (18), spacers (19), and
nuts (27).
• Shims are positioned into their original
positions. Make sure the convex and
concave sides of the shims are together.
Tighten
• Nuts (27) to 142 N m (105 ft. lbs.).
4. Remove the safety chain and install the wheel
and tire assembly.
5. Check the front end alignment.
• Refer to FRONT END ALIGNMENT (SEC.
3A).
6. Lower the vehicle to the ground.
LOWER CONTROL ARM
Remove or Disconnect (Figures 5 through 8,
and 16)
Tools Required:
J-23742 Ball Joint Separator
Raise the vehicle and support it with suitable
safety stands. Remove the wheel and tire
assembly.