Disc Brake
Caution: Refer to Brake Fluid Irritant Caution in the Preface section.
- With the tire and wheel assemblies removed
and the brake rotors retained by wheel lug nuts, visually inspect the caliper piston
dust boot (2) sealing area to ensure that there are no brake fluid leaks.
- If any evidence of a brake fluid leak is present, the brake caliper requires
overhaul or replacement.
- While the brake system is at rest (4), observe the position of
the caliper piston (1) in relation to the caliper housing.
- Have an assistant apply and release the brake pedal several times while
you observe the operation of the hydraulic brake caliper.
4.1. | Observe the caliper piston (1) for unrestricted and even movement
during each apply of the brake system (5). |
4.2. | Observe the caliper piston (1) for an unrestricted and even return
motion during each release of the brake system (6). |
- If the caliper piston (1) did not exhibit unrestricted and even
movement during brake system apply and/or release, the piston square seal (3)
may be worn or damaged and the caliper may require overhaul or replacement.
Drum Brake
- With the rear tire and wheel assemblies
and the brake drums removed, visually inspect the wheel cylinder pistons boot sealing
areas to ensure that there are no brake fluid leaks.
- If any evidence of a brake fluid leak is present, the brake wheel cylinder
requires replacement.
- Using firm hand pressure, simultaneously and evenly apply force on both
brake shoes in order to compress the wheel cylinder pistons into their bore.
- Evenly release the force from both brake shoes to allow the wheel cylinder
pistons to return.
- If one or both of the wheel cylinder pistons did not exhibit unrestricted
and even movement during apply and/or release of force, the wheel cylinder may require
replacement.