2022.3-0000010 OM 3.9.4.2.3 Check and adjustment of the double-line brake valve actuator of the pneumatic system
1 – brake valve; 2 – rod; 3 – lock-nut; 4 – fork; 5 - pin; 6 – lever. Figure 3.9.5 – Adjustment of the double-line brake valve of the pneumatic system Check and, if necessary, adjustment of the brake valve actuator of double-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 connecting head (with yellow 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 engine; 3. Air pressure according to the pressure gage connected to the connecting head (with yellow cover) of the control line shall equal to zero. Shift the interconnected brake pedals to the max. travel. The pressure shall rise to 0.65…0.8 MPa. Release the brake pedals. Engage the parking brake, moving its handle to the max. value. The pressure shall rise to 0.65…0.8 MPa. If the pressure per the pressure gage, connected to the connecting head of the control line does not correspond to the stated above, perform the following operations: - check length of the rod 2 assembly (figure 3.9.5); - 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 3.9.5) IS IN GOOD ORDER AND ITS ACTUATOR 1 IS ADJUSTED CORRECTLY, THE PRESSURE ACCORDING TO THE PRESSURE GAGE, CONNECTED TO THE CONNECTING HEAD (WITH THE YELLOW COVER) OF THE CONTROL LINE, SHALL RISE FROM ZERO TO 0.65…0.8 MPA AS THE INTERCONNECTED BRAKE PEDALS ARE FULLY DEPRESSED OR THE PARKING BRAKE LEVER DISPLACED TO THE MAX. VALUE!
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