Corolla Wagon 4WD L4-96.8 1587cc 1.6L DOHC (4A-FE) (1990)
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Brake Master Cylinder: Description and Operation
MASTER CYLINDER / BRAKE PEDAL RELATIONSHIP
WARNING: Master Cylinders can be easily misdiagnosed for problems related to excessive brake pedal travel.
Excessive brake pedal travel is often associated with a defective master-cylinder, however total pedal travel is affected by a wide variety of
components and issues.
Issues Affecting Pedal Travel
Brake Fluid
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Brake fluid which is contaminated with air or water will significantly add to the amount of pedal travel.
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Pure DOT 3 (or 4) brake fluid is incompressible (allowing for a solid, firm pedal). A small amount of air trapped in the brake fluid will