1. Before the oil pump test, add clean mechanical oil or vegetable oil to the oil tank, press the handle up and down to see if the piston of the oil press rises. If the piston does not rise or the handle is effortless when pressing, check the valves of the fuel tank and remove the air in the pipeline.
2. Test the pressure of the machine, use 1.25 times the normal working pressure, check that the piston extends to a larger working stroke, stabilize the pressure for 15 minutes, and the pressure gauge reading should not exceed 4% of the test pressure. All oil circuits are There should be no leakage; after the pressure is relieved, the pressure gauge pointer returns to the '0' position, the parts should be undamaged, the lever must not be deformed, and the moving parts have no hysteresis.
3. Reliability test of the safety valve: adjust the safety valve to working pressure up to +5 MPa to the left and +1 MPa to the bottom to the left, and test 5 times continuously. The needle valve opens and closes sensitively, and the pressure gauge reading should not be lower after each valve trip Rated working pressure.
