Apply and hold constant foot pressure on the brake pedal with the engine at idle position. Ensure that the transmission is in the NEUTRAL position. The brake hydraulic system may have the following conditions if the brake pedal gradually loses foot pressure:

Perform a visual inspection of the hydraulic system.

Inspect the master cylinder fluid level. A slightly low brake fluid level in either reservoir can result from normal lining wear. An abnormally low fluid level indicates a leak in the system. A full master cylinder does not always indicate that there is no leakage. Slight leakage can occur and not appear as a fluid level condition.

Internal leakage may be the cause if no external leaks are found. Internal leakage is related to an internal master cylinder condition. Disassemble the master cylinder in order to accurately diagnose internal leakage. Refer to the instructions included with the service repair kit. Contact the Bendix® Helpline at 1-800-AIR-BRAK (1-800-247-2725) for additional overhaul information.

Inspect the brake hoses and the pipes at least twice a year for the following conditions:

Inspect the brake hoses and the pipe connections for fluid leaks and damage. Replace the brake hoses and the pipe connections if fluid leaks or damages are detected. Ensure that all of the mounting hardware is in place and secure. Repair the hoses or the pipe connections as needed.