Brake Fluid Leaks

SYSTEM LEAK DIAGNOSIS
With the engine at idle and the transmission in Neutral position, apply and hold constant foot pressure on the brake pedal. If the pedal gradually falls away, the hydraulic system may have external leakage, internal leakage, or incorrect component adjustment. Begin by performing a visual inspection of the hydraulic system. Check 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 mean there is no leakage. Slight leakage can occur and not appear as a fluid level condition.

If no external leaks are found, an internal leakage condition may be the cause. This relates to an internal master cylinder condition. To diagnose internal leakage, the master cylinder will require disassembly.

BRAKE HOSE AND PIPE INSPECTION
Brake hoses and pipes should be inspected at least twice a year for any signs of road damage, cracks, and chafing of the outer cover. Check for fluid leaks and damage at the brake hose and pipe connections. If any of these conditions are visible, replace the hose or pipe. Make sure all mounting hardware is in place and secure. Repair these as needed.