
119
The second circuit consists of cans, upper section of brake valve 31, primary brake relay
valve 18, brake chambers 15, modulators 17.
Third circuit consists of air cylinder 23, control valve of trailer brakes 12 with two-wire
drive, automatic coupling heads 13,14 to couple trailers with two-wire brake drive.
When footing brake pedal first and second circuits of truck brake drive are actuated, as
well as third circuit of trailer brake drive.
If one of the circuits is broken, others stay in operation.
To test the system all circuits are equipped with pneumatic system air bleed valve.
All air cylinders are equipped with condensed water drain valves.
Pneumatic brake system drive devices serve to create compressed air reserve of the truck
and to actuate truck and trailer brakes.
Brake system drive schematics without trailer outlets is shown in Figure 101.
1-towing device; 2-oil separator; 3-two-pointer pressure gauge; 4-pressure controller with adsorption tank;
5-adsorption tank cylinder; 6-4-circuit protective valve; 7-loss of pressure detector; 8-front axle brake can;
9-rear bogie brake cans; 10,13,16,19,25-pneumatic system air bleed valves; 11-condensed water drain
valve; 12-brake chambers with spring-type brake actuators; 14,24-ABS modulators; 15-primary brake re-
lay valve; 17-parking brake relay valve; 18-parking brake valve; 20- СТС cylinder; 21-check valve; 22-
non-brake consumers can; 23-brake chambers; 26-parking brake pneumatic valve; 27-engine stop air cyl-
inder; 28-brake valve; 29-brake actuation sensor; 30-compressor; a-to the air-over hydraulic booster
Figure 101 - Scheme of Pneumatic Brake System Drive without Trailer Outlets
Содержание 4320M
Страница 1: ...URAL 4320М TRUCK and its Modifications ...
Страница 34: ...33 Figure 17 Truck Ural 43206 0551 71 Figure 18 Truck Ural 43206 3111 79 Figure 19 Truck Ural 43206 3511 79 ...
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Страница 159: ...156 Figure 123 Engine Electronic Control Unit Wiring Scheme ...
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Страница 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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