6.1. Working brake system

MAINTENANCE
Possible malfunctions of the working brake system and ways of their elimination
REPAIR




Fig. 256. Brake mechanism of a forward wheel:
1 – spring; 2 – blocks;
3 – bracket; 4 – support; 5 – protective cap; 6 – lock ring; 7 – sealing ring; 8 – protective cover; 9 – piston; 10 – plug; 11 – bolt; 12 – screw; 13 – cap; 14 – perepuskny valve; 15 – cap; 16 – bolt of fastening of a spring; 17 – block of cylinders


Fig. 257. Brake mechanism of a back wheel: and – tags on basic fingers; 1 – basic finger; 2 – board; 3 – opening caps for visual control of a condition of brake slips; 4 – wheel brake cylinder; 5 – perepuskny valve; 6, 12 – brake shoes; 7 – protective cap; 8 – piston; 9 – sealing rings; 10 – persistent ring;
11 – coupling spring


The basic device of brake mechanisms is shown in fig. 256 and 257.

Fig. 258. Drive of the main cylinder: 1 – tank;
2 – main brake cylinder; 3 – nut; 4 – vacuum amplifier; 5 – pedal arm; 6 – ottyazhny spring; 7 – fork; 8 – pedal; 9 – finger; 10 – pedal axis; 11 – braking signal switch


Fig. 259. Vacuum amplifier: 1 – cover of the secondary camera; 2 – piston of the secondary camera;
3 – return valve; 4 – spring; 5 – nut; 6 – emphasis; 7 – rod; 8 – washer; 9 – rod sealant; 10, 12, 37 – lock washers; 11 – sealing ring; 13 – sealing cuff of a cover; 14 – plate of a diaphragm; 15 – the directing cover ring; 16 – cover of primary camera; 17 – basic ring; 18 – diaphragm of the piston of the secondary camera; 19 – connector; 20 – buffer; 21 – spring of a diaphragm of the valve of management; 22 – diaphragm of the piston of primary camera; 23 – case of the amplifier; 24 – piston of primary camera; 25 – valve case; 26 – persistent washer; 27 – the directing case ring;
28 – sealing cuff of the case; 29 – valve piston; 30 – air filter; 31 – protective cover; 32 – pusher fork; 33 – pusher; 34 – spring plug; 35 – valve spring; 36 – sealant of the valve of management; 38 – forelock-provoloka; 39 – valve diaphragm; 40 – screw-upor; I, II – atmospheric cavities; III, IV – vacuum cavities


Fig. 260. Main brake cylinder: 1 – protective cap; 2 – a cover with the sensor of emergency falling of level of brake fluid; 3 – tank;
4 – case of the main brake cylinder; 5 – stopper; 6,13 – laying;
7 – stopper insert; 8 – spring; 9 – spring saddle; 10, 19 – washers; 11,
17 – pistons; 12 – the bolt is persistent; 14 – plug limiter; 15 – screw emphasis; 16 – the cuff is sealing; 18 – external cuff; 20 – lock ring; 21 – the plug is connecting


Fig. 261. Pressure regulator: 1 – piston; 2 – sealing ring of the piston; 3, 6 – basic washers of a spring of the piston; 4 – piston spring; 5 – case; 7 – piston head sealant; 8 – case plug; 9 – basic washer of the plug of a pusher; 10 – pusher plug; 11 – sealing ring of a pusher;
12 – basic plate; 13 – pusher plug spring; 14 – stopper; 15 – laying of a stopper; 16 – perepuskny valve; 17 – cap; 18 – piston plug;
19 – lock ring; 20 – protective cover


The drive of the working brake system (fig. 258) includes a pedal, the vacuum amplifier (fig. 259), the two-chamber main brake cylinder with the sensor of level of brake fluid (fig. 260), pipelines with connecting fittings, wheel cylinders and the regulator of pressure (fig. 261) which automatically corrects pressure of brake fluid in brake mechanisms of back wheels depending on car loading.
On a part of cars installation of the main brake cylinder with two separate tanks and the signaling device of violation of tightness of one of contours is possible.