Hummer H3. Manual — part 953

J 21128 Axle Pinion Oil Seal Installer. See Special Tools.

Removal Procedure

Fig. 46: Measuring Pinion Rotation Torque - Front Axle
Courtesy of GENERAL MOTORS CORP.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the engine protection shield (EPS). Refer to Engine Shield Replacement .

3. Drain the drive axle. Refer to Front Axle Lubricant Replacement.

4. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .

2007 Hummer H3

2007 Driveline/Axle Front Drive Axle - H3

5. Remove the brake calipers. Refer to Front Brake Caliper Replacement .

6. Measure the torque required in order to rotate the pinion. Using an inch-pound torque

wrench, record the torque value for reassembly. This will give the combined preload for the
following components:

The pinion bearings

The pinion seal

The carrier bearings

The axle bearings

The axle seals

Fig. 47: View Of Pinion Shaft & Pinion Yoke Alignment Marks
Courtesy of GENERAL MOTORS CORP.

7. Scribe an alignment line between the pinion shaft and the pinion yoke.

2007 Hummer H3

2007 Driveline/Axle Front Drive Axle - H3

Fig. 48: Holding Pinion Yoke With Special Tool
Courtesy of GENERAL MOTORS CORP.

8. Install the J 8614-01 (1) onto the pinion, as shown. See Special Tools.

9. Remove the pinion nut while holding the J 8614-01 (1). See Special Tools.

10. Install the J 8614-2 (2) and the J 8614-3 (3) into the J 8614-01 (1), as shown. See Special

Tools.

11. Remove the pinon yoke by turning the J 8614-3 (3) clockwise, while holding the J 8614-01

(1). See Special Tools.

12. Remove the oil seal using a suitable seal removal tool.

IMPORTANT: Carefully remove the seal from the bore. Do not distort or

scratch the aluminum case.

2007 Hummer H3

2007 Driveline/Axle Front Drive Axle - H3

Fig. 49: View Of Dust Deflector
Courtesy of GENERAL MOTORS CORP.

13. Remove the dust deflector from the pinion yoke using a soft-faced hammer.

Installation Procedure

2007 Hummer H3

2007 Driveline/Axle Front Drive Axle - H3