Pump output pressure of the pump is determined by the load, and is 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 state of repair at the pump, if the inlet line or system leak hydraulic cylinders, check valves, valve and so have a greater leakage, 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 repair hydraulic pumps, hydraulic cylinders may rupture repair, 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 pressure value required by the load, 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. Optional installation location. It must be filled with hydraulic fluid within the motor. ● speed range nmin no minimum speed limit. Even if the required number of revolution, the nmin should be less than 50r / min. Minimum displacement maximum speed of the motor by the maximum flow from the pump motor and variables of the decision. Maximum speed see data sheet. Minimum displacement by a small displacement limit screw mechanical limit, so it will not exceed the maximum allowable variable motor speed. Variable motor minimum displacement setting from Vgmin to 0.7Vgmin, setpoint adjustment in the factory setting. Adjusting screw shield to prevent unauthorized adjustment. Hydraulic pump test, crystal creating a hydraulic quality assurance (certification), the hydraulic 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.