Two left and right swing relief valves are installed in the swing motor.
1. Pressure measurement method
(1) Turn the start switch from the "ON" position to the "START" position, and then turn it to the "ON" position to start the engine
(2) Turn on the working mode to "Heavy Duty", APC mode to "H", automatic deceleration mode to "OFF", and economy mode to "OFF"
(3) The adjustment mode display shows "A, PUMPI" and "B, PUMP2" (4) to make the engine run and heat until the oil temperature reaches (50±5)℃. The hydraulic oil level is displayed as "HOL" on the adjustment mode screen "
(5) Turn the accelerator knob clockwise to the high idle stop position
(6) Open the machine to the maximum position, with one end of the bucket against the wall, and gradually move the turning joystick until it reaches the turning line. The end of the process. Follow this step to measure the left and right swing pressure, and record the pressure reading PUMPI of pump A during each action...27. 4 MPa.
2. Method of adjusting cross overflow pressure
Swing motor relief valve, the adjustment method of cross relief pressure is as follows
(1) Remove the nut from the sleeve.
(2) Increase or remove the gasket thickness for adjusting the overflow pressure setting. There are 4 types of gasket thickness: 0Imm, 0.3mmn, 0.5mm and 1.0mm. Install thicker gaskets as needed to adjust the pressure at the lower end of the spring: about 059MPa per 0.1mm thickness.
(3) After reassembly, adjust the tightening torque.
