试验冷却、循环回路：正式启动前，先点动电机几次，每次使液压油充满叶片泵

Test cooling and circulation circuit: <br>Before the official start, start the motor several times, each time the hydraulic oil is filled with the vane pump before continuous operation. <br>Test the performance, noise, leakage, motor current and other values ​​of the motors, pumps, overflow valves, pipelines and other components of the cooling and filter circuits, and record the corresponding test values. <br>Adjust the pressure of the overflow valve of the cooling and filtering circuit to 1MPa, and lock the pressure regulating knob. <br>If there is abnormal noise during operation, stop and check immediately; <br>test the cooling water side of the cooling circuit: connect the cooling water pipeline, the flow direction of the cooling water is upwards and downwards, the on-off solenoid water valve 4DT can control the on-off of the cooling water ; <br>Test plunger pump motor unit: <br>open the butterfly valve corresponding to each motor pump, close the ball valve, and check the direction of the one-way valve. <br>Adjust the pressure of the electromagnetic overflow valve to the lowest level, energize the electromagnetic overflow valve, start the motor several times, and then formally start the motor, and run it for a few minutes without load.

Test cooling and circulation circuit:<br>Before formal start-up, jog the motor several times to fill the vane pump with hydraulic oil each time before continuous operation.<br>Test the performance, noise, leakage and motor current of the motor, pump, overflow valve, pipeline and other components of the cooling and filtering circuit, and record the corresponding test values.<br>Adjust the pressure of the overflow valve of the cooling and filtering circuit to 1MPa, and lock the pressure regulating knob.<br>In case of abnormal noise during operation, stop the machine immediately for inspection;<br>Cooling water side of the test cooling circuit: connect the cooling water pipe, the flow direction of cooling water is from top to bottom, and turn on and off the solenoid water valve 4dt to control the on and off of cooling water;<br>Test plunger pump motor set:<br>Open the butterfly valve corresponding to each group of motor pump, close the ball valve, and check the direction of the check valve.<br>Adjust the pressure of the electromagnetic overflow valve to the minimum, energize the electromagnetic overflow valve, jog the motor several times, and then officially start the motor and run without load for several minutes.

Test cooling and circulation loop: Before starting formally, start the motor several times, and then run continuously after filling the vane pump with hydraulic oil each time. Test the performance, noise, leakage, motor current equivalence of the motor, pump, overflow valve, pipeline and other components of the cooling and filtering circuit, and record the corresponding test values. Adjust the pressure of overflow valve of cooling and filtering circuit to 1MPa, and lock the pressure regulating knob. If there is any abnormal noise during operation, stop the machine immediately for inspection; Cooling water side of the test circuit: connect the cooling water pipeline, the flow direction of cooling water is up and down, and the electromagnetic water valve 4DT can be turned on and off to control the on-off of cooling water; Test plunger pump motor set: Open the butterfly valves and ball valves corresponding to each group of motor pumps, and check the direction of check valves. Adjust the pressure of the electromagnetic relief valve to the minimum, energize the electromagnetic relief valve, jog the motor several times, then officially start the motor, and run for several minutes without load.