NOTE It is more convenient to perform work with the assistant.

It is better to carry out removal of air from the hydraulic drive of coupling by means of special installation. Pressure when "pumping" should not exceed 250 kPa.

You carry out removal of air from the hydraulic drive of coupling in the following order:

– you will hang out and record basic racks a forward part of the car;

Fig. 7.6. Elements of the hydraulic drive of coupling: 1 – tank of the hydraulic drive of the coupling/main thing of the brake cylinder; 2 – liquid supply hose; 3 – vacuum amplifier of brakes; 4 – dustproof cap; 5 – brake servo-driver arm; 6 – coupling pedal; 7 – union of pumping of the main cylinder of coupling; 8 – main cylinder of coupling; 9 – nut of fastening of an arm of the main cylinder of coupling; 10 – pipeline coupling; 11 – pipeline; 12 – laying; 13 – support; 14 – plug; 15 – laying; 16 – union of pumping of the working cylinder of coupling; 17 – working cylinder of coupling; 18 – nuts of fastening of an arm of the working cylinder; 19 – coupling case; 20 – coupling of a flexible hose; 21 – flexible hose

– remove by means of installation air from the main cylinder of the coupling located from a partition of a motor compartment near the vacuum amplifier of brakes of 3 (fig. 7.6) ; remove a protective rubber cap from the union of pumping located in the top part of the cylinder;

– put on a transparent tube the valve of production of air of the main cylinder of coupling, and lower other end of a tube in capacity with a small amount of brake fluid, and the end of a tube has to be shipped in brake fluid. Container with brake fluid has to be at least 300 mm above the pumping valve — it will help to prevent hit of air in the cylinder through a pumping valve carving;

– check that the level of brake fluid in a tank of the main brake cylinder was within norm, and prepare fresh brake fluid for a dolivka;

– press a pedal of coupling and at the pressed pedal unscrew half way the union of pumping of the main cylinder of coupling. Continuing to press a pedal, force out the liquid which is in system together with air through a tube in capacity. After the pedal adopts the extreme forward provision, and the liquid effluence through a hose will stop, zaverntit the pumping valve against the stop. Repeat these operations until air ceases to come out a tube. Holding a pedal in the pressed situation, wrap the union against the stop and pick up the phone. Carefully wipe the valve of pumping of the main cylinder of coupling and establish into place a protective cap;

– remove with a similar way air from the working cylinder of coupling.