Wheel Bearing Adjustment; Wheel Hub Bolt - GMC G Service Manual

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Figure 18 — Installing the Inner Bearing Outer Race

WHEEL BEARING ADJUSTMENT

] Important (Figure 16)
• 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 bear­
ing must be lubricated to ensure the bearings will
creep. The spindle nut (78) must have a free-running
fit on the spindle threads.
NOTICE: Never preload the front wheel bear­
ings. Damage can result by the steady thrust on
the roller ends which comes from preloading.
( 2 | Adjust
• Raise the vehicle and support it with suitable safety
stands under the lower control arms.
1. Remove the dust cap (79) from the hub/rotor (81).
2. Remove the cotter pin (80).
f e l Tighten
• Nut (78) to 16 N»m (12 ft. lbs.) while rotating the
wheel and tire assembly (this will seat the
bearings).
3. Back off the nut (78) to the "just loose" position.
4. Finger tighten the nut (78).
5. Back off the nut (78) until the hole in the spindle lines
up with a slot on the nut.
• Do not back off more than 1/2 of a flat.
6. New cotter pin (80).
• Make sure the bent ends do not interfere with
the dust cap (79).
|^ || Measure
• Endplay in the hub/rotor assembly (81).
I
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FRONT SUSPENSION 3C-17
• It should measure between 0.03 mm (0.0012
inches) and 0.13 mm (0.005 inches) when prop­
erly adjusted.
7. Install the dust cap (79) on the hub/rotor (81).
8. Wheel and tire assembly (if removed).
• Lower the vehicle.

WHEEL HUB BOLT

E Remove or Disconnect (Figure 19)
Tool Required:
J 9746-02 Hub/Rotor Support
1. Hub/rotor 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 (74) with a press.
• Support the hub/rotor (81) using J 9746-02 and
press bars (figure 19).
• Do not damage the wheel mounting surface on
the hub/rotor flange.
A. Press Bars
Figure 19 — Removing the Hub Bolts
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