Vacuumvalve Vacuum pipe frominlet manifold Air valve Return spring Diaphragm
Download

A direct-acting servo is fitted between the brake pedal and the master cylinder. The pedal can work the master cylinder directly if the servo fails or if the engine is not running.

Appears in

How the braking system works

Modern cars have brakes on all four wheels, operated by a hydraulic system. The brakes may be di...