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1. Start the engine, let's it work within two-three minutes, then muffle.
2. Several times squeeze out a pedal of a foot brake with normal effort, - at each muscleman height of provision of the squeezed-out pedal has to increase.
3. Holding a pedal of squeezed out, start the engine, - the pedal has to fail considerably.
4. Without releasing a pedal, kill the engine and hold a pedal squeezed out within not less than 30 seconds, - for the stipulated time height of provision of a pedal should not change. Insignificant raising of a pedal will demonstrate existence of leaks in the amplifier, - check serviceability of functioning of the control valve. If the valve as it should be, replace assembly of the servo-driver of the amplifier. |