Pumping of a hydraulic drive of brakes is necessary for removal of air which considerably reduces efficiency of braking. Air can get to a hydraulic drive owing to system depressurization at repair or replacement of brake liquid. To availability of air in a drive point the increased course of a pedal of a brake and its softness. Before removal of air check tightness of all knots of a drive of brakes and their connections.
At partial separation of elements of hydraulic system and acceptance of the corresponding precautions for prevention of further loss of liquid it is possible to pump over only the corresponding part of system.
Pumping carry out together with the assistant.
Press a brake pedal several times at the idle engine to create in cavities of the vacuum amplifier the identical pressure close to atmospheric pressure.
Uncover a tank of brake system, add in it brake liquid and establish a cover into place.
In the course of pumping of brake system watch, that level of brake liquid did not fall below the tank middle.
In the course of pumping of brake system constantly watch availability of brake liquid in a tank, without allowing an exposure of its bottom as thus air again will get to system.
Remove a dustproof cap from the union of pumping of the working brake cylinder of a back right wheel, clear it and put on it the pure transparent hose which other end lower in the capacity which has been partially filled with brake liquid.
Sharply press a pedal of a brake of 3-5 times with an interval 2–3 with, and at the pressed pedal of a brake unscrew on a turn half the pumping union. Continuing to press a pedal, force out the liquid which was in system together with air through a hose in capacity. After the pedal will reach extreme bottom situation and the liquid effluence through a hose will stop, wrap the pumping union to the full. Repeat these operations, the air outlet from a hose will not stop yet.
Holding a pedal in the pressed situation, wrap the pumping union against the stop and remove a hose from the pumping union.
Wipe the union of pumping and establish a protective cap.
Repeat these operations for other wheels in the following order:
– left back wheel;
– right forward wheel;
– left forward wheel.
Pure brake liquid store in a tight vessel as it absorbs moisture from air therefore the temperature of boiling of liquid goes down and conditions for corrosion of details of brake system are created.
Check level of brake liquid in a compensatory tank of brake system and if necessary finish it to norm.
After the completion of pumping press against the stop a brake pedal, thus it should pass about a half of the course