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1. Press a brake pedal several times at the idle engine to create the identical pressure close to the atmospheric in cavities of the vacuum amplifier. At the same time on the effort enclosed to a pedal, define, whether there is no jamming of the case of the valve. Stop a brake pedal in the middle of its course and start the engine. At the serviceable vacuum amplifier the brake pedal after start of the engine has to leave forward. If the pedal does not leave forward, check fastening of a tip of a hose, a condition of fastening of a flange of a tip in the amplifier, a condition of a hose and the union. |