Adjustment of the park brake cables is necessary whenever
the park brake cables have been loosened or disconnected. A need for park
brake cable adjustment in indicated if the hydraulic brake system operates
with good reserve, but a firm park brake pedal feel cannot be achieved with
less than one full stroke of the park brake pedal.
Adjustment Procedure
- Cycle the brake system
1.1. | Apply the service brake with a pedal force of approximately 660 N·m
(150 lb ft) and release. |
1.2. | Fully apply the park brake using approximately 550 N·m
(125 lb ft) pedal force and release. |
1.3. | Apply and release the park brake two additional times as described
above. |
- Check the park brake pedal assembly for full release by turning
the ignition on and inspecting the BRAKE warning indicator light. The light
should be off. If the BRAKE warning light is on and the park brake appears
to be fully released, operate the manual pedal release lever and pull downward
on the park brake cable to remove slack from the pedal assembly.
- Raise the vehicle.
- Check the park brake levers on the rear calipers. The levers should
be against their stops on the brake caliper housing. If the levers are not
against the stops, check for binding in the rear brake cables and position
the levers against the stops.
- Tighten the park brake cable at the adjuster until either the
left or right lever begins to move off the stop.
- Loosen the adjuster until the lever which moved off the stop in
step 4 is again resting on the stop. Both levers should be resting on the
brake caliper stops after completing this step.
- Operate the park brake several times to check adjustment. A firm
pedal feel should be obtained by deepening the pedal less than one full stroke.
- Inspect left and right caliper levers. Both levers must be resting
on the stops after adjustment of the park brake.
- Check the operation of the park brake. If possible , place the
vehicle on a grade and check park brake holding ability.