Hummer H1 (2006+). Manual — part 237

7-30

Brake System

_____________________________________________________________

4.

Slide the parking brake cable through the parking brake cable assembly. Remove the clip securing the cable sleeve to the C-
beam. Disconnect the parking brake cable from the equalizer bar. Discard the clip.

5.

Remove the capscrew, washer, nut and lockwasher assembly and the washer securing the clamp to the mounting bracket and
the parking brake cable assembly. Discard the nut and the lockwasher assembly.

6.

Remove the capscrew, lockwasher, clamp, and the parking brake cable assembly from the bracket. Discard the lockwasher.

NOTE: Perform step 7 if the clamp bracket is damaged. If not replacing the bracket, proceed to installation. Note the position of
the cable, bracket, and the clamp prior to removal.

7.

Remove the two capscrews and the bracket from the support bracket.

Installation

NOTE: Perform step 1 if the clamp bracket was removed. If not, proceed to step 2.

1.

Rotate the bracket inward on the support bracket and secure with the two capscrews (Figure 7-27).

2.

Install the clamp on the parking brake cable assembly and bracket with the lockwasher and the capscrew.

3.

Install the clamp on the parking brake cable assembly and the mounting bracket with the washer, capscrew, washer, nut, and
the lockwasher assembly.

4.

Install the cable sleeve on the C-beam and the parking brake cable to the equalizer bar and secure with the clip.

CAUTION: Ensure that the caliper cable bracket is secure with no signs of looseness and the lever is in contact with the caliper
cable bracket stop. Damage to equipment and poor performance will result if not aligned properly.

5.

Install the cable sleeve on the caliper cable bracket with the clip.

6.

Install the brake clevis on the lever with the clevis pin, washer, and the cotter pin.

7.

Adjust the parking brake lever.

Figure 7-27: Left Parking Brake Cable Components

PARKING BRAKE

SUPPORT BRACKET

CALIPER CABLE

CALIPER

BRACKET

LEVER

PARKING BRAKE CABLE

BRAKE CLEVIS

CLEVIS

BRACKET

CABLE

CABLE SLEEVE

PARKING BRAKE CABLE

CLIP

EQUALIZER BAR

C-BEAM

CABLE

STOP

BRACKET

CABLE ASSEMBLY

SLEEVE

PIN

CLIP

MOUNTING
BRACKET

____________________________________________________________

Brake System 7-31

5745804

PARKING BRAKE ROD REPLACEMENT

Removal

1.

Put the transmission in PARK, chock the wheels, and release the parking brake.

2.

Remove the cotter pin, washer, clevis pin, and the brake clevis from the lever. Discard the cotter pin (Figure 7-28).

3.

Remove the six clips and spread the boot to allow access to the cotter pin (Figure 7-29).

4.

Remove the cotter pin, washer, clevis pin, and the clevis securing the brake rod to the bellcrank. Discard the cotter pin.

5.

Disconnect the spring from the bracket (Figure 7-29).

6.

Remove lthe ocknut from the conical washer, and the brake rod from the equalizer bar. Discard the locknut.

7.

Remove the clevis, nut and the spring from the brake rod.

Installation

1.

Install the spring, nut, and the clevis on the brake rod.

2.

Install the brake rod on the equalizer bar with the conical washer and the locknut. Tighten the locknut far enough to expose 3-
5 threads on the end of the brake rod.

3.

Connect the spring to the bracket.

4.

Spread the boot and install the clevis to the bellcrank with the clevis pin, washer and the cotter pin.

5.

Install the six clips on the boot.

CAUTION: Ensure that the caliper cable bracket is secure with no signs of looseness and the lever is in contact with the caliper
cable bracket stop.

6.

Install the brake clevis on the lever with the clevis pin, washer, and the cotter pin (Figure 7-30).

7.

Adjust the parking brake.

Figure 7-28: Parking Brake Rod Attachment at Caliper

PARKING BRAKE ADJUSTMENT

NOTE: The integral parking/service brake mechanism has an automatic adjusting feature and does not require periodic manual ad-
justment. When parking brake components or rear brake pads are replaced, the parking brake linkage must be initially positioned to
ensure proper parking brake system operation. The only additional adjustment necessary is accomplished with the parking brake
hand lever.

CALIPER CABLE BRACKET

CALIPER CABLE

BRACKET STOP

LEVER

BRAKE

CLEVIS

CLEVIS PIN

7-32

Brake System

_____________________________________________________________

Figure 7-29: Parking Brake Rod Location

Adjustment

1.

Put the transmission in PARK, chock the wheels, and release the parking brake.

2.

Remove the six clips and spread the boot to allow access to the cotter pin (Figure 7-30).

3.

Remove the cotter pin, washer, and the clevis pin securing the clevis to the bellcrank. Discard the cotter pin.

4.

Repeatedly apply and adjust the parking brake hand lever until the bellcrank linear travel is 0.75 in. (19 mm).

Figure 7-30: Parking Brake Adjustment

CAUTION: The holes in the parking brake clevis must align with the holes in the adjusting bellcrank without force for proper
parking brake adjustment. Failure to do this may result in damage to the equipment and poor performance.

5.

Release the parking brake. Loosen the nut and adjust the clevis so the holes in the clevis align with the holes in the bellcrank.
Secure the clevis to the bellcrank with the clevis pin, washer, and the cotter pin.

CAUTION: Do not overtighten the parking brake rod. Overtightening the parking brake rod may result in dragging brakes.

EQUALIZER BAR

SPRING

CLIP

BELLCRANK

BOOT

CLEVIS PIN

CLEVIS

FRAME

BRAKE ROD

BRACKET

CONICAL WASHER

1/2” ENGAGEMENT
TO EQUALIZE

BRAKE

BELLCRANK

BRAKE

0.75 in.

CLIP

BOOT

BELLCRANK

CLEVIS PIN

CLEVIS

PARKING

BRAKE

ROD

(19 mm)

____________________________________________________________

Brake System 7-33

5745804

6.

If necessary, remove the excess slack in the parking brake cables by turning the parking brake rod clockwise or
counterclockwise into the clevis.

CAUTION: Ensure that the caliper cable bracket is secure with no signs of looseness and the lever is in contact with the caliper
cable bracket stop. Damage to equipment and poor performance will result if not aligned properly.

NOTE: Perform step 7 on both sides of the vehicle.

7.

The parking brake rod is properly adjusted if the lever is in contact with the caliper cable bracket stop (Figure 7-31).

8.

Tighten the nut against the clevis.

9.

Install the six clips in the boot (Figure 7-30)

10. Adjust the parking brake lever.

Figure 7-31: Caliper Cable Bracket Stop

PARKING BRAKE HAND LEVER REPLACEMENT

Removal

1.

Put the transmission in PARK, chock the wheels, and release the parking brake.

2.

Remove the parking brake switch.

3.

Remove the six clips and open the lower boot to allow access to the clevis pin. Discard the clips (Figure 7-32).

4.

Remove the cotter pin, washer, and the clevis pin from the clevis and the bellcrank. Discard the cotter pin.

5.

Remove the nut and lockwasher assembly, wiring harness clamp, nut and the lockwasher assembly, and the bolt securing the
parking brake hand lever to the body. Discard the nut and the lockwasher assemblies (Figure 7-33).

6.

Remove the three locknuts, washers, and the bolts securing the parking brake hand lever to the body. Discard the locknuts.

7.

Remove the two locknuts, washers, bolts, and the washers securing the parking brake hand lever to the body and remove the
parking brake lever. Discard the locknuts.

8.

Remove the upper boot from the parking brake hand lever.

9.

Remove the boot from the body.

Installation

1.

Install the boot on the body. Install the upper boot on the parking brake hand lever.

2.

Install the parking brake hand lever on the body and secure with the two washers, bolts, washers, and the locknuts.

3.

Secure the parking brake hand lever on the body with the bolt, nut and the lockwasher assembly, wiring harness clamp, nut,
and the lockwasher assembly.

4.

Secure the parking brake hand lever on the body with three bolts, washers, and the locknuts.

CALIPER CABLE

BRACKET STOP

CALIPER CABLE

BRACKET

LEVER