Trailer Brake Drive; General Information; Double-Line Pneumatic Drive Of Trailer Brakes - Belarus 922.6 Operator's Manual

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4.7 Trailer brake drive

Your tractor can be equipped with a double-line pneumatic drive for trailer brakes.

General information on the double-line pneumatic drive for trailer brakes configuration is

given in subsection 4.7.2.

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-922.6 in base-line configuration are equipped with double line

pneumatic drive providing brake control of trailers and agricultural machines, equipped with

two-line pneumatic brake drive. The pneumatic drive is used also for tires charging and oth-

er purposes where energy of compressed air is required. The configuration of two-line

pneumatic drive is shown in Figure 4.7.1.

In the pneumatic drive are installed the connecting heads 8, 9 (Figure 4.7.1) of valve

type. The valves of connecting heads prevent air outlet, if pneumatic drive is used without

trailer (for example, tire charging) and at emergency trailer disconnection. At connection of

the trailer brake lines with tractor lines the valves of connecting heads open, providing pas-

sage of the compressed air from tractor pneumatic drive to the trailer. It is necessary to

connect pneumatic lines, if there is no pressure in tank 2 of the tractor.

ATTENTION: BEFORE CONNECT OR DISCONNECT TRACTOR AND TRAILER

PNEUMATIC LINES, ENGAGE PARKING BRAKE! IT IS NECESSARY TO CONNECT

TRACTOR AND TRAILER PNEUMATIC LINES WHEN THERE IS NO PRESSURE IN

PNEUMATIC SYSTEM OF THE TRACTOR!

1 – condensate drain valve; 2 – tank; 3 – air pressure indicator; 4 – alarm lamp of

emergency air pressure; 5 – air pressure sensor; 6 – emergency air pressure sensor; 7– feed

line; 8 – connecting head of feed line (with red cap); 9 – connecting head of control line (with

yellow cap); 10 –control line; 11 - brake valve; 12 - pressure regulator; 13 - air bleed valve; 14

– compressor brake valve.

Figure 4.7.1 – Configuration of double-line pneumatic drive of trailer brakes

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922.6-0000010 OM

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923.6