In case of damage of the main brake cylinder it needs replacement. At assembly of the brake cylinder it is necessary to watch purity of a workplace and the collected details carefully.

By preparation for replacement:

— switch off ignition;

— disconnect a negative wire from the rechargeable battery;

— clear in a motor compartment of a surface around the main brake cylinder and impose them with rags;

— several times press a brake pedal to get rid of depression in system;

— merge brake fluid from a tank: on the car with a mechanical box of change of transfers disconnect a hose of supply of brake fluid to the coupling drive, muffle its opening;

— disconnect the socket of the sensor of level of brake fluid in a tank;

— remove a protective cover of the holder of the socket;

— disconnect a vacuum hose from the vacuum amplifier of brakes;

Fig. 6.20. Fastening of the air pump (a) and side of safety locks

— remove the block of safety locks and put it aside (fig. 6.20, b);

— weaken fastening and take out the air pump from the holder (fig. 6.20, a).

Replacement of the main brake cylinder and vacuum cylinder includes a number of works which should be carried out in such order:

Fig. 6.21. Main brake cylinder: 1 and 2 — tubes; 3 — a nut; 4 — a bolt

1) remove the main cylinder:

— disconnect brake tubes 1 and 2 from the main cylinder, muffle openings;

— turn out a bolt 4 fastenings of the reducing valve to an arm;

— turn off nuts 3 fastenings of the cylinder to vacuum to the amplifier;

— remove an arm of the reducing valve and the main cylinder with a sealing ring;

2) remove the vacuum amplifier of brakes:

— remove from salon the dashboard, a lock spring bracket, a washer and a pin from a pusher, turn off four nuts of the vacuum amplifier of brakes;

— remove from a motor compartment the vacuum amplifier of brakes and consolidation;

3) establish the vacuum amplifier of brakes:

— clear the vacuum amplifier of brakes and a Torpedo partition;

— put in a motor compartment new laying of the vacuum amplifier of brakes and the vacuum amplifier of brakes on a Torpedo partition, having convinced that the brake pedal correctly rose in a pusher;

— put four nuts from salon (tighten the moment 25 N · l), a pin, a washer and a lock spring bracket on a pusher, the pribotny panel;

— check the stoplight switch;

— connect a vacuum hose to the vacuum amplifier of brakes; put an arm for the reducing valve;

4) install the main cylinder:

— put a new sealing ring on the main cylinder;

— adjust position of the main cylinder: the rod of the vacuum amplifier of brakes has to rise correctly in the main cylinder;

— connect brake tubes to the main cylinder, and also tighten an arm and a bolt of fastening of the drosseliruyushchy valve fingers;

— wrap nuts of fastening of the main cylinder and a bolt of the reducing valve, tighten their moment 25 N · m;

— connect the liquid level sensor socket in a brake tank.

— connect to a tank of the main brake cylinder a hose of supply of brake fluid in the coupling drive (for cars with the mechanical transmission);

5) fill a tank with brake fluid, wrap brake tubes if brake fluid begins to follow. Tighten the moment 14 N · m;

6) deliver the removed knots and details on places:

— hose of preliminary heating;

— protective cover of the holder of the socket;

— the air pump in the holder, the moment of an inhaling of 10 N · m;

— block of safety locks moment of an inhaling of 10 N · m.

7) check pressure in systems of brakes and couplings, if necessary pump over them.