Pneumatic System; General Information; Single-Line Pneumatic Drive Of Trailer Brakes - Belarus 1822.3 Operator's Manual

ATTENTION: ADJUSTING LINK LENGTH AVOID DECREASING OF LENGTH OF
THE LINK PART THAT IS SCREWED INTO THE FORK BELOW 12 MM. TIGHTEN THE
LINK FORK LOCKNUTS WITH A TORQUE OF 40 TO 45 N·M!

3.9 Pneumatic system

3.9.1 General information

Upon order your tractor may be equipped with the following type of the trailer brake
drive:
- single-line pneumatic drive;
- double-line pneumatic drive;
- combined pneumatic drive of trailer brakes;
Technical specifications and adjustments, carried out during operation, for each
type of the trailer brake drives are given below.
ATTENTION: BEFORE CONNECTING OR DISCONNECTING TRACTOR AND
TRAILER PNEUMATIC LINES, ENGAGE PARKING BRAKE! IT IS ALLOWED TO CON-
NECT TRACTOR AND TRAILER PNEUMATIC LINES WHEN THERE IS NO PRESSURE IN
TRACTOR PNEUMATIC SYSTEM!
ATTENTION: PERFORM ADJUSTMENT OR TROUBLESHOOTING OF THE
TRACTOR TRAILER BRAKE SYSTEM AND BRAKE DRIVE ONLY WHEN THE ENGINE
IS SHUT OFF AND THE TRACTOR IS ON AN EVEN SURFACE, BLOCKED WITH
BRAKE SHOES PUT UNDER THE WHEELS, WHICH EXCLUDE SPONTANEOUS
MOVEMENT OF THE TRACTOR.

3.9.2 Single-line pneumatic drive of trailer brakes

The single-line pneumatic drive of trailer brakes provides controlling brakes of trail-
ers and agricultural machines, equipped with a single-line pneumatic drive, as well as tire
inflation. A diagram for the single-line pneumatic drive is shown in figure 3.9.1.
1 – compressor; 2 – line from engine inlet manifold; 3 – pressure regulator; 4 – air
bleed valve; 5 – brake valve; 6 – control line; 7 – connecting head; 8 – air pressure indica-
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