Brake Master Cylinder - Bypass Condition

Component Tests

Brake Master Cylinder - Bypass Condition

1. Inspect the master cylinder. For additional information, refer to Brake System Inspection Brake System Inspection.

2. Disconnect the brake tubes from the master cylinder.

3. Plug the outlet ports of the master cylinder.

4. NOTE: Make sure that the outlet port plugs do not show signs of leakage.

Lightly apply the brakes and hold for 10 seconds. Release the brakes and then reapply with heavy force. If brake pedal height cannot be maintained, the brake master cylinder has an internal leak and a new brake master cylinder must be installed.