Constant Control Priorities in pilot pressure control, pressure control and constant pilot control of the motor can not control the domestic pump, the motor working pressure is lower than the pilot pressure constant set pressure, the motor will be fully provided by the system to control ; When the motor operating pressure reaches the set pressure constant, constant pressure control servo valve motor will be automatically controlled. Mainly by adjusting the control lever 1 knot, the regulator housing 2, variable piston 3, the pilot pressure control servo valve 4, the regulator spring 5, the feedback spring 6, the regulator guide rod 7, constant pressure control servo valve assembly 8 and one-way valve. Constant pressure control servo valve consists of a control valve housing, control spool, the spring and the adjusting screw and other components. The output pressure of the pump is determined by the load, and approximately proportional to the input torque. There are two fault output abnormal pressure. (1) The output pressure is too low when the pump is self-priming in the state, if the inlet line or system leak hydraulic cylinders, check valves, valve leak have a greater pump, all the pressure will not rise up . This need to find air leakage, tighten, replace the seals, it can increase the pressure. Adjust the pressure relief valve is faulty or low system pressure do not increase, readjust the pressure relief valve or repair. If the hydraulic cylinder and valve plate bias caused large spills, serious, the cylinder may rupture should be re-ground mating surfaces or replace the pump. (2) The output pressure is too high if the loop load continues to rise, the pump pressure has continued to grow, comes as normal. If the load is constant, the pump pressure exceeds the required load pressure of the hydraulic pump sales, you should check the outside of the pump hydraulic components, such as directional valves, pressure valves, actuators and return oil pipes. If the maximum pressure is too high, adjust the relief valve. Pump maintenance | hydraulic genuine crystal Chong (certified) | pump from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.