Hummer H2. Manual — part 2179

9. Lower the vehicle.

WHEEL HUB, BEARING, AND SEAL REPLACEMENT

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

2. Remove the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

3. Remove the rotor. Refer to Brake Rotor Replacement - Front in Disc Brakes.

4. Remove the wheel speed sensor and brake hose mounting bracket bolt from the steering knuckle.

5. Disconnect the electrical connection for the wheel speed sensor.

6. Remove the wheel driveshaft nut retaining cover.

7. Remove the wheel driveshaft assembly retaining nut and washer from the wheel driveshaft assembly.

Disengage the wheel driveshaft from the wheel hub and bearing.

Fig. 22: O-Ring & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

8. Remove the wheel hub and bearing mounting bolts.

NOTE:

Never place vehicle on the ground with the halfshaft removed or the halfshaft
nut torqued improperly. Otherwise, bearing seals may become dislodged
causing premature wear and/or damage to the hub and bearing assembly.

2004 Hummer H2

2004 SUSPENSION Front Suspension - Hummer H2

9. Remove the wheel hub and bearing and splash shield from the vehicle.

10. Remove the O-ring seal from the steering knuckle bore.

11. Remove the wheel speed sensor from the wheel hub and bearing.

12. Clean and inspect the O-ring seal.

13. Replace the seal if the following conditions exist:

z

Nicks

z

Cuts

z

Dry or brittle

z

Compression set

Installation Procedure

1. Clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly.

2. Lubricate the steering knuckle bore with wheel bearing grease or the equivalent.

Fig. 23: O-Ring & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

3. Install the O-ring to the steering knuckle.

4. Install the wheel speed sensor to the wheel hub and bearing.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 SUSPENSION Front Suspension - Hummer H2

Tighten: Tighten the sensor mounting bolt to 18 N.m (13 lb ft).

5. Install the wheel hub and bearing and splash shield to the vehicle.

6. Install the wheel hub and bearing mounting bolts.

Tighten: Tighten the wheel hub to knuckle bolts to 180 N.m (133 lb ft).

7. Install the nut and washer retaining the wheel drive shaft assembly to the wheel hub and bearing.

Tighten: Tighten the nut to 235 N.m (173 lb ft).

8. Connect the electrical connection for the wheel speed sensor.

9. Install the wheel speed sensor and brake hose mounting bracket bolt to the steering knuckle.

Tighten: Tighten the bolt to 12 N.m (106 lb in).

10. Install the rotor. Refer to Brake Rotor Replacement - Front in Disc Brakes.

11. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

12. Lower the vehicle.

TORSION BAR REPLACEMENT

Tools Required

J 36202 Torsion Bar Unloading/Loading Tool. See Special Tools and Equipment .

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

2004 Hummer H2

2004 SUSPENSION Front Suspension - Hummer H2

Fig. 24: Installing J 36202 To Adjustment Arm & Crossmember
Courtesy of GENERAL MOTORS CORP.

2. Install the J 36202 to the adjustment arm and the crossmember. See Special Tools and Equipment .

3. Increase the tension on the adjustment arm until the load is removed from the adjustment bolt and the

adjuster nut.

4. Remove the adjustment bolt and the adjuster nut.

IMPORTANT: Mark the adjustment bolt and count the number of times that is required

to remove the adjustment bolt.

2004 Hummer H2

2004 SUSPENSION Front Suspension - Hummer H2