Parking Brake Cable Inspection Inspection
- If the parking brake is malfunctioning, check for the following
conditions:
• | Parking brake cable sticking |
• | Parking brake out of adjustment |
- Inspect the brake linings at regular intervals, and any time the
wheels are removed (tire rotation, etc.).
- Replace the shoe and lining assemblies in the axle sets if the
lining thickness is worn to within 0.76 mm (1/32 in) of the
shoe or rivet.
GM replacement brake lining material is recommended in order to maintain
the balance between front and rear brake performance. Installation of the
brake lining material having characteristics different from those of the
recommended GM replacement parts can change the intended brake balance of
the vehicle.
Parking Brake Cable Inspection Adjustment
Adjustment
- Adjust the rear brakes. Refer to
Drum Brake Adjustment
.
- Apply the parking brake to six clicks and release. Repeat this
apply/release step five times.
- Check the parking brake pedal for full release by turning the
ignition to ON and checking the BRAKE warning lamp. The lamp should be off.
If the lamp is on, verify that the pedal is in the fully released position
and pull downward on the front parking brake cable to remove the slack.
- Raise the vehicle and suitably support the vehicle. Refer to Raising
and Supporting the Vehicle in General Information.
- Remove the access hole plug in the rear brake backing plates.
- Adjust the parking brake cable until a 1/8-inch drill bit (2) can be
inserted through the access hole into the space between the show web and the
park brake lever (3). Satisfactory cable adjustment is achieved when a 1/8-inch
bit will fit into the space, but a 1/4-inch bit will not.
- Apply the parking brake one click and check rear wheel rotation.
When you try to rotate the wheels by hand in a forward direction, the wheels
should not move; in a rearward direction, the wheels should drag or not move.
- Release the parking brake and check for free wheel rotation.
- Reinstall the access hole plugs.
- Lower the vehicle.