Tools Required

J 28662 Brake Pedal Effort Gauge

Most low brake pedal conditions are the result of air in the system. Bleed the system until all of the air is purged. Refer to Hydraulic Brake System Bleeding . Other less frequent causes of excessive pedal travel include the following conditions:

Measure the brake pedal travel at reasonably frequent intervals. Pedal travel is the distance that the pedal moves toward the floor from a fully released position.

Use the following procedure in order to measure the brake pedal travel:

1. With the engine OFF, pump the brake pedal a minimum of three times in order to exhaust the vacuum assist from the power booster.



2. Install the J 28662 onto the brake pedal.
3. Hook the end of a tape measure over the top edge of the brake pedal. Measure the distance to the rim of the steering wheel.
4. Depress the brake pedal with approximately 445 N·m (100 lbs) of force while the brakes are cold, then remeasure brake pedal travel. Pedal travel should not exceed 74 mm (2.91 in).
5. If pedal travel is still excessive, refer to Brake Pedal Excessive Travel .