Hummer H3. Manual — part 1555

PARKING BRAKE SHOE INSPECTION

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

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

3. Remove the rear brake caliper bracket with the rear brake caliper. Refer to Rear Brake

Caliper Bracket Replacement .

4. Remove the rear brake rotor. Refer to Rear Brake Rotor Replacement .

5. Inspect and replace the park brake shoe and lining if any of the following conditions are

Brake Actuator Replacement.

Did you find and correct a condition?

Go to Step 25

Return to
Symptom Table

25

Adjust the park brake. Refer to Park
Brake Adjustment (LHD) or Park
Brake Adjustment (RHD).
Were you able to attain adjustment of
the park brake system?

Go to Step 26

Return to
Symptom Table

26

1. With the transmission still in

NEUTRAL, apply the park
brake.

2. Attempt to rotate the rear wheels

to check the rear brakes for a
significant amount of drag.

3. Release the park brake.

4. Rotate the rear wheels to check

the rear brakes for a significant
reduction of drag.

Did the park brake apply and release
properly?

Go to Step 27

Return to
Symptom Table

27

Install or connect any components that
were removed or disconnected during
diagnosis.
Did you complete the operation?

Park Brake
System OK
Return to
Symptom Table

-

CAUTION: Refer to Brake Dust Caution .

2007 Hummer H3

2007 BRAKES Park Brake - H3

found:

Excessive wear indicated by the park brake lining being worn down to the shoe

Brake lining cracking

Oil or fluid contamination of the brake lining

6. Adjust the park brake shoe. Refer to Park Brake Adjustment (LHD) or Park Brake

Adjustment (RHD).

7. Install the rear brake rotor. Refer to Rear Brake Rotor Replacement .

8. Install the rear brake caliper with the rear brake caliper bracket. Refer to Rear Brake

Caliper Bracket Replacement .

9. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation .

10. Lower the vehicle.

PARK BRAKE DRUM INSPECTION

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

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

3. Remove the rear brake caliper bracket with the rear brake caliper. Refer to Rear Brake

Caliper Bracket Replacement .

4. Remove the rear brake rotor. Refer to Rear Brake Rotor Replacement .

5. Inspect and replace the park brake shoe and lining if any of the following conditions are

found:

Excessive wear indicated by the park brake lining being worn down to the shoe

Brake lining cracking

Oil or fluid contamination of the brake lining

6. Adjust the park brake shoe. Refer to Park Brake Adjustment (LHD) or Park Brake

Adjustment (RHD).

7. Install the rear brake rotor. Refer to Rear Brake Rotor Replacement .

8. Install the rear brake caliper with the rear brake caliper bracket. Refer to Rear Brake

Caliper Bracket Replacement .

9. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation .

10. Lower the vehicle.

CAUTION: Refer to Brake Dust Caution .

2007 Hummer H3

2007 BRAKES Park Brake - H3

REPAIR INSTRUCTIONS

PARKING BRAKE SHOE REPLACEMENT

Fig. 1: Identifying Parking Brake Shoe Components
Courtesy of GENERAL MOTORS CORP.

Parking Brake Shoe Replacement

Callout

Component Name

Preliminary Procedures

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

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

3. Remove the brake rotor. Refer to Rear Brake Rotor Replacement .

1

Plug, Park Brake Adjuster Access

2

Spring, Park Brake Shoe Upper Return

3

Spring, Park Brake Shoe Lower Return

Adjuster, Park Brake Shoe
Tip:

2007 Hummer H3

2007 BRAKES Park Brake - H3

PARKING BRAKE RELEASE HANDLE ASSEMBLY REPLACEMENT

4

Clean the adjuster threads and apply a light coat of high temperature
brake lubricant to the adjuster threads.

Fully retract the park brake shoe adjuster.

5

Cap, Park Brake Shoe Retainer Spring (Qty: 2)

6

Spring, Park Brake Shoe Retainer (Qty: 2)

7

Pin, Park Brake Shoe Retainer Spring (Qty: 2)

8

Shoe, Park Brake (Qty: 2)
Tip:

1. Set the J 21177-A so that it contacts the inside diameter of the rotor.

See Special Tools.

2. Position the J 21177-A over the shoe and the lining at the widest point.

See Special Tools.

3. Turn the adjuster nut until the lining just contacts the J 21177-A . See

Special Tools.

4. Repeat steps 1-3 for the opposite side.

5. Adjust the park brake cable. Refer to Park Brake Adjustment (LHD)

or Park Brake Adjustment (RHD).

2007 Hummer H3

2007 BRAKES Park Brake - H3