Cruze

Hydraulic Brake Component Operation Visual Inspection

Warning: Refer to Brake Fluid Irritant Warning in the Preface section.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution in the Preface section.




1. With the tyre and wheel assemblies removed and the brake rotors retained by wheel nuts, visually inspect the calliper piston dust boot (2) sealing area to ensure that there are no brake fluid leaks.
2. If any evidence of a brake fluid leak is present, the brake calliper requires overhaul or replacement.
3. While the brake system is at rest (4), observe the position of the calliper piston (1) in relation to the calliper housing.
4. Have an assistant apply and release the brake pedal several times while you observe the operation of the hydraulic brake calliper.

4.1.	Observe the calliper piston (1) for unrestricted and even movement during each apply of the brake system (5).

4.2.	Observe the calliper piston (1) for an unrestricted and even return motion during each release of the brake system (6).

5. If the calliper 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 calliper may require overhaul or replacement.