Hydraulic Oil Selection: Selection 20-200Cstnian hydraulic oil viscosity hydraulic oil, recommended 30-50cST quality hydraulic oil viscosity. When the oil temperature is below 5 degrees, to deal with the hydraulic oil for heating. Cleanliness of hydraulic oil should be kept in NAS10 below should be cleaned every three months back to the oil filter element variable pump care. To keep the oil flow and clean. Oil level in the oil holding ruler bits or more: When the oil level is too low, the hydraulic oil is contained in the air is not sufficiently released, so that the pumps produce much noise and damage. When the hydraulic pressure control slide valve spring force is equal to the left side of the slide valve is closed, the control cylinder stop motion, ending the process variable, the pump working pressure to re-stabilize the setting value in the vicinity of the spring. Similarly, when the system pressure is reduced variable pump repair call. Variable flow pump mechanism to increase the output variable displacement pump, working pressure back up to the setting value. To a remote pressure control system 12 remote pressure control principle shown in Figure 2, it is basically the same principle and the constant voltage control, the only difference is that the pressure regulating valve can be installed in any position according to the variable displacement pump maintenance needs. , Thereby adjusting the pressure of the pump remote play role. Is the remote pressure control valve, usually direct-acting relief valve, proportional relief valve can also be used. When using proportional relief valve, variable pump pressure by electrical adjustment. Variable pump maintenance. | Variable pump | Hydraulic from Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!