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Servo
The amplifier is located on the left side in the engine compartment, for the master cylinder. Additional pressure is created by the membrane, which during braking under the influence of differential pressure created by a vacuum pump, transmits it to the master cylinder piston. On the idle engine vacuum suction is reduced, therefore, it is lost, and the enhancing effect. Thus, for example, towing, it is necessary to apply much more pressure when you press the brake pedal to achieve a normal effect. Check the accuracy of the amplifier can be as follows: - Repeatedly press the brake pedal and then hold it. If you then start up the engine, the pedal should fall a bit more. In this case, all right; - Leave the engine running. Then press and hold the brake pedal. Stop the engine - the pedal should not rise; - Empty and stop the motor again. Repeatedly press the brake pedal. The first time you turn the pedals to be the largest and should decrease with each subsequent click. If the amplifier does not operate normally, probably leaking vacuum hose or faulty check valve in the vacuum hose. You can check this by disconnecting the hose from the amplifier. When a working paper at the end of the hose should feel the suction action. When installing a new valve pay attention to its correct location. If the amplifier is faulty, it is replaced in gathering. Independent repair amplifier is impossible, because it requires a special tool. But to repair the amplifier hardly take and the service station. The failure of the amplifier does not mean complete failure of the brake. However, the effort required on the pedal is pressed to save the previous braking distances increase significantly, especially for a minivan.
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