Brake Master Cylinder: Description and Operation

The brake master cylinder is different than on Escort and Tracer models without anti-lock brakes. The relief port of the brake master cylinder has been eliminated and a center valve with a center port has been included in the secondary piston.

Fig. 5 Cross-Sectional View Of Operating Brake Master Cylinder:

When the brake pedal is not pressed, the secondary piston is pressed toward the stop pin by the return pin. At the same time, the center valve within the secondary piston is pressed open by the stop pin, providing a return path to the brake master cylinder reservoir.

Fig. 5 Cross-Sectional View Of Operating Brake Master Cylinder:

When the brake pedal is pressed, the secondary piston is moved away from the stop pin. The center valve spring presses the center valve against the secondary piston, closing the return path and allowing brake fluid pressure to be generated. Operation of the primary piston is unchanged.