CONSTRUCTION SPECIFICATIONS

The vacuum braking system consists of an intake manifold - which supplies the necessary vacuum (with the engine running) for the operation of the brake servo to which it is connected by a pipe - and the pump, also known as the master cylinder, fitted on the brake servo.

The pump is connected by two rigid pipes, each of which supplies a section of the crossover circuit, to the ABS/VDC electro-hydraulic control unit.

    See descriptions 3350E VEHICLE DIRECTION CONTROL SYSTEM VDC/ESP

OPERATION

The system offers smoother, more powerful braking through the action of the brake servo. The brake servo is a pneumatic device which, using the effect of the vacuum available (with engine running) inside the intake manifold, provides power for the brake pedal action at the pump and allows smoother braking.

If there is a problem with the vacuum system (or with the engine not running), the operation of the braking system is guaranteed because the connection between the pedal and the brake pump remains operational.

In these emergency conditions, the brake pedal becomes very difficult to operate and the braking system does not maintain the same responsiveness, so it is therefore advisable to drive very carefully to the nearest authorized workshop to have the system checked.