Wheel Hub, Bearing, and Seal Replacement (C3500HD)
FRONT HUB/BEARINGREMOVAL PROCEDURE
^ Tools Required:
- J 9746-02 Wheel Stud Remover
1. Raise the vehicle. Support the vehicle with suitable safety stands.
2. Remove the tire and wheel assembly.
NOTICE: Support the caliper with a piece of wire to prevent damage to the brake line.
3. Remove the brake caliper.
4. Remove the retainer/cap.
5. Remove the cotter pin, the nut, and the washer.
6. Remove the wheel hub/rotor.
^ Pull the hub/rotor free from the spindle. Make sure the outer wheel bearing comes free.
^ Do not damage the steering knuckle spindle threads.
7. Remove the inner wheel bearing. Pry out the seal.
8. Remove the races. Using a brass drift, drive out each race.
9. Clean any grease from the hub/rotor and the steering knuckle spindle. Clean any grease from inside the hub.
NOTICE: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.
10. Using clean solvent and a small brush with no loose bristles, clean any grease from the wheel bearings and the races.
11. Inspect the wheel bearings and the races for damage or wear.
^ If a bearing or the race is damaged, replace both of these.
12. Inspect the hub/rotor for damage or wear.
^ Check for out of round or scored conditions.
^ Check for pitting or cracks.
^ If necessary, repair or replace the hub/rotor.
INSTALLATION PROCEDURE
NOTICE: Start the races squarely inside the hub/rotor to avoid distortion and possible cracking.
1. Install the races into the hub/rotor.
1.1. Place the hub/rotor on the J 9746-02. Rest this assembly on the press bars.
1.2. Using a 7.6 cm (3 in) diameter bar, or equivalent, press the outer bearing race into position.
1.3. Remove the J 9746-02 and use a 7.6 cm (3 in) diameter bar, or equivalent, in order to press the inner bearing race into position. If the bar is larger than 7.6 cm (3 in), the bar may damage the bearing seal seat.
Important:
^ Use an approved, high-temperature front wheel bearing grease in order to lubricate the bearings.
^ Do not mix different greases because 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, the shoulder, and the seal seat.
3. Apply a small amount of grease inboard of each wheel bearing retainer/cap.
NOTICE: Failure to completely pack the wheel bearing (cones, rollers, and cage) with grease will result in premature wheel bearing damage and/or wear.
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, the cones, and the cage.
5. Install the inner wheel bearing into the hub/rotor. Put an additional quantity of grease outboard of this bearing.
6. Install the new seal.
6.1. Using a seal installer or a block, install the seal in order to ensure that the seal is flush with the hub/rotor flange.
6.2. Lubricate the seal lip with a thin layer of grease.
7. Install the hub/rotor. Do not damage the steering knuckle spindle threads.
8. Install the outer wheel bearing. slide the bearing over the spindle until the wheel bearing fully seats against the hub/rotor Outer race.
9. Install the washer, the nut, and the cotter pin. Do not place the cotter pin through the hole in the spindle until the wheel bearings are adjusted.
Tighten
Tighten the nut to 16 Nm (12 lb ft), while turning the hub/rotor assembly by hand.
NOTICE: 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.
9.1. Apply an additional amount of grease outboard of the wheel bearing.
9.2. Adjust the wheel bearings.
10. Install the cotter pin.
11. Install the retainer/cap in place.
12. Install the brake caliper.
13. Install the tire and wheel assembly.
14. Lower the vehicle.