Single-Wire Pneumatic Drive For Trailer Brakes; Hydraulic Drive Of Trailer Brakes - Belarus 2022.6 Operator's Manual

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4.7.3 Single-wire pneumatic drive for trailer brakes

Against order tractors "BELARUS-2022.6" may be equipped with a single-wire

pneumatic drive for trailer brakes.

A single-wire pneumatic drive for trailer brakes provides brake control for trailers

and agricultural machines, equipped with a single-wire pneumatic brake drive. Pneumatic

drive is also used for tire inflation and other purposes which require compressed air en-

ergy. The diagram for a single-wire pneumatic drive is shown in figure 4.7.2.

Pneumatic drive has coupling head 6 (figure 4.7.2) of valve type. Valve of coupling

head prevents air outlet when using a pneumatic drive without a trailer (for example, dur-

ing tire inflation) and at emergency separation of a trailer. When a trailer brake line con-

nects with a tractor line, valve of coupling head opens letting compressed air go from trac-

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

the absence of pressure in tractor tank 7.

ATTENTION: BEFORE COUPLING OR UNCOUPLING TRACTOR AND TRAILER

PNEUMATIC LINES, ENGAGE A PARKING BRAKE! COUPLING OF TRACTOR AND

TRAILER PNEUMATIC LINES SHALL BE CARRIED OUT IN THE ABSENCE OF PRES-

SURE IN THE TRACTOR PNEUMATIC SYSTEM!

1 – compressor; 2 – line from diesel inlet manifold; 3 – valve for condensate re-

moval; 4 – brake valve; 5 – connecting line; 6 – connecting head; 7 – tank; 8 – pressure

regulator valve; 9 – air bleed valve; 10 – air pressure sensor; 11 – sensor for emergency air

pressure.

Figure 4.7.2 – Single-wire pneumatic drive for trailer brakes

Tractors "BELARUS-2022.6" can be equipped with the hydraulic drive of trailer

brakes against order.

The hydraulic drive of trailer brakes is interlocked with tractor operating brakes con-

trol and provides actuation of wheel brakes of trailer or semi-trailer, equipped with the sys-

tem of the hydraulic drive of trailer brakes. The hydraulic connecting line is fed from the

HLL pump that provides pressure between 10 ...15 MPa and is made as single-wire brake

system. The connection of the hydraulic drive corresponds to the standard ISO/5676 of

1983.

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2022.6-0000010 OM

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