Hydraulic oil Optional: hydraulic oil viscosity of hydraulic oil pump variable 20-200Cstnian care. 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 refinement. 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. Pressure limiting type variable vane pump is a single-acting} {variable pump pump maintenance. The stator of the pump along a given direction for translational motion, in operation, according to changes in the system load by the force balance principle are located on both sides of the variable pump stator blades piston and spring preload, can change the variable pump stator and the pump rotor of the variable eccentricity, thus changing the variable vane pump flow. Steady flow pump system {} double acting vane pump: the completion of each revolution of the rotor suction, each secondary drain. Double acting vane pump compared with single acting vane pump, the flow uniformity, the basic balance suffered radial hydraulic pressure rotor body. Double acting vane pump is generally quantitative outflow, played the role of steady flow. Asker evaluation study, O (∩_∩) O Thank variable pump maintenance. Crystal create a hydraulic (certified), variable 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 to create a hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal to create a better future for the hydraulic.