Non-Pressure External Leaks

A low brake fluid level in the brake master cylinder reservoir may be caused by the following non-pressure external leaks:

1. Type 1
   
   An external leak may exist at the brake master cylinder filler cap due to incorrect position of the cap, cap gasket, or cap gasket deterioration.
2. Type 2
   
   An external leak may exist at the brake master cylinder mounting flange due to internal seal failure. Repair or install a new brake master cylinder.
3. Type 3
   
   An external leak may exist at the base of the brake master cylinder reservoir due to deteriorated reservoir mounting seals. Repair or install a new brake master cylinder