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

The main cylinder of coupling is located in a motor compartment, to the right of the vacuum amplifier of brakes (see fig. 7.6 ).

You carry out removal of the main cylinder in the following order:

– uncover the block of safety locks, unscrew screws of fastening and remove the lower part of the dashboard;

– remove a spring bracket of fastening and take a pin with a head and an opening under the forelock, the fixing pusher of the main cylinder to a coupling pedal;

– press a hose of supply of liquid from a tank to the main cylinder of coupling by a suitable clip and disconnect a hose from the main cylinder of coupling;

– unscrew the union of the pipeline and disconnect the hose going to the working cylinder of coupling;

– in interior of the car remove the protection cover of a pusher of the main cylinder of coupling;

– turn off nuts of fastening and remove the main cylinder.

Its assembly and installation you carry out check of technical condition of details of the main cylinder in the following order:

– clear the external surface of the main cylinder of coupling.

– using the screw-driver as the lever, remove a rubber casing and take a pusher. Weaken a lock-nut, turn off a collar of fastening and take a pusher from a rubber casing;

– take a lock ring from the cylinder, and also laying, the piston and a spring. Pay attention that the end of a spring having smaller diameter settles down from the piston;

– carefully clear details of the main cylinder of coupling, check their state and if necessary replace them. Replace a cuff of the piston irrespective of its state;

– lower a new cuff in brake fluid and install it on the piston according to shooters indexes. Make sure that the working edge of a cuff is before a spring on the end of the piston;

– install a spring by the end having bigger diameter in the main cylinder of coupling. Having lowered the piston in brake fluid, accurately insert it into the coupling cylinder;

– establish laying and a lock ring in a cylinder flute;

– grease a pusher end face with a thin layer of special lubricant, install it on the piston and put on a rubber casing. Наживив a lock-nut and a collar, tighten a lock-nut.

You carry out installation of the main cylinder to the sequences, the return folding.

Remove air from hydraulic system of the drive of coupling.