Trailer Brake Drive; General Information; Double-Wire Pneumatic Drive For Trailer Brakes - Belarus 2022.6 Operator's Manual

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4.7 Trailer brake drive

Your tractor can be equipped with a double-wire or single-wire pneumatic drive for

trailer brakes or a hydraulic drive for trailer brakes. General information on double-wire

pneumatic drive for trailer brakes is given in subsection 4.7.2. General information on sin-

gle-wire pneumatic drive for trailer brakes is given in subsection 4.7.3. General information

on the hydraulic drive for trailer brakes configuration is given in subsection 4.7.4.

ATTENTION: ALL ADJUSTMENT OPERATIONS OF THE BRAKING SYSTEM

AND THE TRAILER BRAKES DRIVE AS WELL AS TROUBLESHOOTING SHALL BE

CARRIED OUT WITH THE ENGINE STOPPED AND THE TRACTOR IN A HORIZONTAL

POSITION, WHICH SHALL BE SECURED BY STOP BLOCKS PUT BEHIND THE

WHEELS AND PREVENTING THE TRACTOR FROM SELF-MOVEMENT!

Tractors "BELARUS-2022.6" in basic configuration are equipped with a double-wire

pneumatic drive providing brake control for trailers and agricultural machines, equipped

with a double-wire pneumatic brakes drive. Pneumatic drive is also used for tire inflation

and other purposes which require compressed air energy. The diagram for a double-wire

pneumatic drive is shown in figure 4.7.1.

Pneumatic drive has coupling heads 6, 7 (figure 4.7.1) of valve type. Valves of cou-

pling heads prevent air outlet when using a pneumatic drive without a trailer (for example,

during tire inflation) and at emergency separation of a trailer. When trailer brake lines con-

nect with tractor lines, valves of coupling head open letting compressed air go from tractor

pneumatic drive to the trailer. At this, coupling of pneumatic lines shall be carried out in the

absence of pressure in tractor tank 9.

1 – compressor; 2 – line from diesel inlet manifold; 3 – valve for condensate removal; 4 –

brake valve; 5 – feed line; 6 – coupling head with red cap; 7 – coupling head with yellow

cap; 8 – control line; 9 – tank; 10 – pressure regulator valve; 11 – air bleed valve; 12 – air pres-

sure sensor; 13 – sensor for emergency air pressure.

Figure 4.7.1 – Diagram of a double-wire pneumatic drive for trailer brakes

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2022.6-0000010 OM

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