15.2. Check of the vacuum amplifier of brakes


The vacuum amplifier of brakes – a non-demountable design therefore at failure he is replaced assembled.
Efficiency of the amplifier can be checked as follows: on the car with the switched-off engine of 4-5 times we press a brake pedal. Holding a pedal of pressed, we launch the engine. At the serviceable amplifier from the beginning of operation of the engine the pedal has to "fail" slightly.
The backpressure valve which is in a tip of a vacuum hose is intended in order that it was possible to slow down the car with sufficient efficiency at suddenly decayed engine. It is possible to check its state, having created pressure in a hose by means of a suitable rubber pear. The untight valve is subject to replacement.