GMC 1986 P-Truck Service Manual page 322

3C-36 FRONT SUSPENSION
NOTICE: Refer to the "Notice" on page 3C#1
of this section.
9. Washer (151), nut (150) and cotter pin (149).
• Do not place the cotter pin through the hole
in the spindle until the wheel bearings are
adjusted.
Tighten
• Nut (150) to 16 N m (12 ft. lbs.) while turning
the hub/rotor assembly in either direction.
Put an additional amount of grease outboard of
10.
the wheel bearing (152).
11. Adjust the wheel bearings.
• Refer to " Wheel Bearing Adjustment," in
this section.
12. Retainer/cap (148) in place.
13. Caliper (142).
• Refer to BRAKES (SEC. 5).
14. Tire and wheel assembly. Lower the vehicle to the
ground.
WHEEL BEARING ADJUSTMENT
Im portant
• The proper functioning of the front suspension
cannot be maintained unless the front wheel
bearings are correctly adjusted. The bearings
must be a slip fit on the spindle and the inside
diameter of the wheel bearing must be lubricated
to ensure the bearings will creep. The spindle nut
(150) must have a free-running fit on the spindle
threads.
NOTICE: Never preload the front wheel
bearings. Damage can result by the steady
thrust on the roller ends which comes from
preloading.
JP
Adjust
Raise the vehicle and support it with suitable
safety stands under the lower control arms.
Remove the retainer/cap (148).
Remove the cotter pin (149).
• Nut (150) to 16 N m (12 ft. lbs.) while rotating
the w heel and tire a ssem bly (or the
hub/rotor). This will seat the bearings.
3. Back off the nut (150) one flat.
• If the hole in the spindle lines up with the
slot in the nut, insert the cotter pin (149).
• If they do not line up, back off the nut until
they do—not more than one additional flat.
Measure
E ndplay in the hub/rotor should m easure
between 0.013-0.20 mm (0.0005-0.008 inches)
when properly adjusted.
4. Install the retainer/cap (148).
5. Lower the vehicle to the ground.
WHEEL HUB BOLT
Remove or Disconnect
Tools Required:
J-9746-02 Hub/Rotor Support
1. Hub/rotor assembly from the vehicle.
• Refer to " Wheel Hub/Rotor Assembly," in
this section.
NOTICE: Place J-9746-02 between the press
bars and the hub/rotor to protect the rotor
surfaces.
2. Wheel hub bolts (153) with a press.
• Support the hub/rotor (153) using J-9746-02
and the press bars.
• Do not damage the wheel mounting surface
on the hub/rotor flange.
-►+ Install or Connect
NOTICE: Refer to the "Notice" on page 3C#1
of this section.
1. Wheel hub bolts (153) into the hub/rotor (154).
• Place four washers onto the bolt, then
fasten a nut onto the bolt until the nut
bottoms on the washers.
• Tighten the nut until the bolt fully seats into
the hub/rotor (154).
• Remove the nut and washers.
2. Hub/rotor to the vehicle.
• Refer to " Wheel Hub/Rotor Assembly," in
this section.
3. Wheel and tire assembly. Lower the vehicle to the
ground.