6.2.3. Air removal from a hydraulic actuator of working brake system
Use only fresh brake DOT 3 or DOT 4 liquid.
Air removal (pumping) from a hydraulic actuator of working brake system is necessary for removal of the air considerably reducing efficiency of braking. Air can get to a hydraulic drive owing to system depressurization at repair, replacement of separate knots or 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.
In the course of pumping of brake system level of brake liquid should not fall below the middle of a tank of a hydraulic actuator of working brake system.
Pumping is carried out with the assistant.
Pumping of brakes carry out in the following sequence:
1–back right working cylinder of a brake;
2–back left working cylinder of a brake;
3–forward right support of a brake;
4–forward left support of a brake.
Lift the car.
Remove a dustproof cap from the pumping union, clear it, put on it one end of a pure transparent hose, other its 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 forward situation and the liquid effluence through a hose will stop, screw the pumping union home. Repeat these operations, the air outlet from a hose will not stop yet.
Holding a pedal in the pressed situation, screw up 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.