Check And Adjustment Of Pneumatic System Two-Wire Brake Valve Actuator - Belarus 3522.5 Operator's Manual

Check and if necessary adjustment of pneumatic system single-wire brake valve ac-
tuator "A" (figure 3.10.2) should be made after adjustment operations of pedal brakes and
control adjustments of parking brake.
ATTENTION: MAKE ADJUSTMENT OF SINGLE-WIRE BRAKE VALVE ACTUA-
TOR AT NOT PRESSED PEDALS OF SERVICE BRAKES AND COMPLETELY
SWITCHED OFF PARKING BRAKE!
Before check and adjust pneumatic system single-wire brake valve actuator put a
tractor on flat ground. The engine should be switched off. Lock the wheels fore and aft with
stop pieces which will exclude spontaneous moving of the tractor.
Check and, if it is necessary, adjustment of brake valve actuator "A" (figure 3.10.2)
of single-wire pneumatic drive should be made in the following order:
- attach manometer with scale not less than 1 MPa to connecting head (with black
cover) of tractor pneumatic drive;
- start the engine and fill tank with air till pressure of 0,77... 0,8 MPa according to
pneumatic system air pressure indicator, situated on dashboard. Stop the engine;
- air pressure according to manometer attached to connecting head should not be
lower than 0,77 MPa. If the pressure is lower, do the following operations:
1. check the length of assembled rod 4 (figure 3.10.2).
2. length of rod should provide its free (without tension) connection to the lever7
by pin 2. If it is necessary, adjust its length by turning of fork 6. Lock fork 6 with nut 5.
- if air pressure according to manometer attached to connecting head, has not
reached necessary value, replace the brake valve.
ATTENTION: AT CORRECTLY ADJUSTED BRAKE VALVE "A" AND ITS ACTUA-
TOR THE PRESSURE SHOULD FALL TILL ZERO AT INTERCONNECTED BRAKES
PEDALS TRAVEL OF 100 ... 120 MM OR AT FIXING OF PARKING BRAKE ON THE
FOURTH-FIFTH TOOTH OF THE SECTOR!

3.10.2.2 Check and adjustment of pneumatic system two-wire brake valve actuator

Check and, if it is necessity, adjustment of pneumatic system two-wire brake valve
actuator "Б" (figure 3.10.2) should be made after adjustment operations of pedal brakes
and control adjustments of parking brake.
ATTENTION: MAKE ADJUSTMENT OF TWO-WIRE BRAKE VALVE ACTUATOR
AT NOT PRESSED PEDALS OF SERVICE BRAKES AND AT COMPLETELY
SWITCHED OFF PARKING BRAKE!
Before check and adjust pneumatic system two-wire brake valve actuator put
a tractor on flat ground. The engine should not run. Lock the wheels fore and aft with stop
pieces which will exclude spontaneous moving of the tractor.
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