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Home >> GMC Truck >> 1997 >> C 3500 Truck 2WD V8-6.5L DSL Turbo VIN F >> Repair and Diagnosis >> Maintenance >> Wheels and Tires >> Wheel Hub >> Service and Repair >> Front Hub and Bearing >> Wheel Hub/Rotor Assembly

Wheel Hub/Rotor Assembly

FRONT HUB/BEARING









^ Tool Required:
- J 9746-02 Hub/Rotor Support
- Or Equivalent

REMOVAL

NOTE: Raise the vehicle and support it with suitable safety stands.

Remove or disconnect the following:
1. Tire and wheel assembly.

CAUTION: Support the caliper with a piece of wire to prevent damage to the brake line.

2. Brake caliper.
3. Retainer/cap (232).
4. Cotter pin (233), nut (234) and washer (235).
5. Wheel hub/rotor (238).
- Pull the hub/rotor free from the spindle, making sure the outer wheel bearing (236) comes free.
- Do not damage the steering knuckle spindle threads.
6. Inner wheel bearing (239).
- Pry out the seal (240).
7. Races.
- Drive out each race using a brass drift.
8. Clean
a. Grease from the hub/rotor (238) and steering knuckle spindle.
- Grease from inside the hub.
b. Grease from the wheel bearings (236 and 239) and races.
- Use clean solvent-and a small brush with no loose bristles.

CAUTION: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged

9. Inspect
a. Wheel bearings (236 and 239) and their races for damage or wear.
- Refer to Wheel Bearings.
- If either a bearing or its race is damaged or worn, replace both.
b. Hub/rotor (238) for damage or wear.
- Check for out-of-round or scored conditions.
- Check for pitting or cracks.
- Repair or replace as necessary.

INSTALLATION

CAUTION:
- Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion Inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.
- Start the races squarely inside the hub/rotor to avoid distortion and possible cracking.

Install or connect the following:
1. Races into the hub/rotor.
a. Place the hub/rotor on J 9746-02 and rest this assembly on press bars.
b. Use a 7.6 cm (3 inch) diameter bar or equivalent to press the outer bearing race into position.
c. Remove J 9746-02 and use a 7.6 cm (3 inch) diameter bar (or equivalent tool) to press the inner bearing race into position. If the bar is larger than 7.6 cm (3 inches), it may damage the bearing seal seat.

NOTE: Use an approved high-temperature front wheel bearing grease to lubricate the bearings.

- Do not mix different greases as mixing may change the grease properties resulting in poor performance.
2. Apply a thin film of grease to the steering knuckle spindle at the outer wheel bearing seat and at the inner wheel bearing seat, shoulder, and seal seat.
3. Put a small quantity of grease inboard of each wheel bearing retainer/cap (232).
4. Fill each wheel bearing (cone and roller assembly) full of grease.
- Use a cone-type grease machine that forces grease into the bearing.
- If a cone-type grease machine is not available, pack the wheel bearing by hand.
- When packing the wheel bearing by hand, work the grease into the bearings between the rollers, cones, and the cage.

CAUTION: Failure to completely pack the wheel bearing (cones, rollers, and cage) with grease will result in premature wheel bearing damage and/or wear.

5. Inner wheel bearing (239) into the hub/rotor (238).
- Put an additional quantity of grease outboard of this bearing.
6. New seal (240).
- Use a seal installer or block to install the seal to ensure it is flush with the hub/rotor flange.
- Lubricate the seal lip with a thin layer of grease.
7. Hub/rotor (238).
- Do not damage the steering knuckle spindle threads.
8. Outer wheel bearing (236).
- Slide it over the spindle until the wheel bearing (236) fully seats against the hub/rotor outer race.
9. Washer (235), nut (234) and cotter pin (233).
- Do not place the cotter pin through the hole in the spindle until the wheel bearings are adjusted. Tighten (234) to 16 Nm (12 lb ft) while turning the hub/rotor assembly in either direction.
- Put an additional amount of grease outboard of the wheel bearing (236).
- Adjust the wheel bearings.
10. Cotter pin (233).
11. Retainer/cap (232) in place.
12. Brake caliper.
13. Tire and wheel assembly.
- Lower the vehicle.

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