Component Test- Brake Master Cylinder - Compensator Port

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

1.

Inspect the master cylinder.

2.

REFER to: Jacking and Lifting - Overview .

3.

Apply and release the brakes.

4.

With the brakes released, attempt to rotate each wheel and check for any brake drag.

If an excessive amount of brake drag exists at multiple wheels, continue to Step 5.
If an excessive amount of brake drag exists at only one wheel, it indicates a possible seized brake caliper, brake wheel cylinder or parking brake component. Repair or install new components as necessary.

5.

Check the brake stoplamp switch and the brake pedal free play to verify the brake pedal is not partially applied.

6.

Loosen the brake master cylinder nuts and position the brake master cylinder away from the brake booster.

7.

With the brakes released, attempt to rotate each wheel and check for any brake drag.

If the brake drag is no longer present, install a new brake booster. REFER to: Brake Booster .
If the brake drag is still present, install a new master cylinder. REFER to: Brake Master Cylinder .