Check And Adjustment Of Single-Line And Double-Line Brake Valves Of The Pneumatic System; General Information; Check And Adjustment Of The Single-Line Brake Valve Actuator Of The Pneumatic System - Belarus 1822.3 Operator's Manual

3.9.4.2 Check and adjustment of single-line and double-line brake valves of the pneu-
matic system

3.9.4.2.1 General information

ATTENTION: MAKE ADJUSTMENT OF BRAKE VALVE DRIVES WITH THE SER-
VICE BRAKE PEDALS NOT PRESSED AND THE PARKING BRAKE COMPLETELY
TURNED OFF, BOTH BEING PREVIOUSLY ADJUSTED!
ATTENTION: CHECK AND IF NECESSARY ADJUSTMENT OF THE SINGLE-LINE
AND DOUBLE-LINE BRAKE VALVES OF THE PNEUMATIC SYSTEM SHOULD BE
CARRIED OUT AFTER ADJUSTMENT OPERATIONS OF SERVICE BRAKE CONTROL
AND OF PARKING BRAKE CONTROL HAVE BEEN CARRIED OUT.
3.9.4.2.2 Check and adjustment of the single-line brake valve actuator of the pneu-
matic system
1 – brake valve; 2 – rod; 3 – locknut; 4 – fork; 5 – pin; 6 – lever.
Figure 3.9.4 – Adjustment of the single-line brake valve of the pneumatic system
Check and, if necessary, adjustment of the brake valve actuator of single-line
pneumatic drive shall be carried out in the following order:
1. Connect a pressure gage with scale division of not less than 1 MPa to the con-
necting head (with black cover) of the tractor pneumatic drive;
2. Start the engine and fill the tank with air to reach pressure of 0.77... 0.8 MPa as
per the pneumatic system air pressure indicator, located on the dashboard. Stop the en-
gine;
3. Air pressure according to the pressure gage connected to the connecting head
shall not be lower than 0.77 MPa. If the pressure is lower, perform the following opera-
tions:
- check length of the rod 2 assembly (figure 3.9.4);
- the rod length shall ensure its free (without tension) connection to the lever 6 by
means of the pin 5. If it is necessary, adjust its length by turning the fork 4. Lock the fork 4
with the lock-nut 3.
4. If air pressure according to the pressure gage connected to the connecting head,
has not reached the required value, replace the brake valve 1.
ATTENTION: IF THE BRAKE VALVE 1 (FIGURE 3.9.4) AND ITS ACTUATOR ARE
ADJUSTED CORRECTLY, THE PRESSURE ACCORDING TO THE PRESSURE GAGE,
CONNECTED TO THE CONNECTING HEAD WITH THE BLACK COVER, SHALL FALL
TO ZERO AS THE INTERCONNECTED BRAKE PEDALS ARE FULLY DEPRESSED OR
THE PARKING BRAKE FULLY ENGAGED!
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