The basic structure of the hydraulic pump is an independent hydraulic power unit, which is composed of a valved axial constant displacement piston pump, a control valve, pipelines, oil tanks, motors and instruments. The hydraulic electric pump can be stopped to maintain pressure. If the external oil circuit does not leak, stop the pump and maintain the pressure for 3 minutes, and the additional pressure drop shall not exceed 5 MPa. However, due to the aging of the gums and the widespread damage, the compressive strength of the hose will decrease after long-term use. Therefore, it is necessary to check it regularly, and check it every half a year if it is used frequently. Use the pressure test pump to pressurize during inspection. When the withstand voltage is lower than 100 MPa, leakage, swelling or explosion occurs, replacement is required. The hydraulic electric pump uses oil as the medium, so it is necessary to maintain the oil and the machine to avoid blockage or oil leakage, which will affect the application effect.

In addition, in case of idling during operation, the oil drain screw on the pump body can be loosened first, the pump body head can be vertically knocked down several times, and then the oil drain screw can be tightened to continue operation; Do not add partial load or overload to avoid the risk of damage to the electric jack. When there is load, do not disassemble the quick connector to avoid accidents and damage to parts. One high-pressure oil pipe has passed the 105Mpa (1050Kgf/cm2) test before leaving the factory. However, due to the simple aging of rubber hose, users should check it frequently, generally for six months. Disassemble the hydraulic electric pump circuit to release the pressure. If not, the oil will spray out quickly. When releasing the pressure on the cylinder head of the hydraulic circuit, loosen the hand wheel or pressure regulating screw at the relief valve, unload the pressure oil, and then block the power supply or power source to form a pressure ring. When the pressure ring compresses the hydraulic pressure, stop the oil pipe connecting device connected with the oil cylinder. Secondly, when disassembling the hydraulic electric pump, the top thread of the piston rod, the thread of the oil port, the surface of the piston rod and the inner wall of the cylinder liner should be protected from damage. It should be removed as much as possible; After disassembly, all parts shall be covered with plastic cloth. After the cotton is used, do not make the slender parts such as the piston and the stop piston rod zigzag or deformed, and use the skid to support the balance when placing.

The operation, disassembly and assembly of the hydraulic electric oil pump shall comply with the specification and be operated according to the process to ensure the normal operation of the electric oil pump.