Selection of general particle filter pollutants 10μm or less impact on the pump is less obvious, but more than 10μm, to pump life have significant impact, especially in 40μm or more. Solid particle contamination of hydraulic oil pump is relatively easy to make the surface of moving parts wear increased pump repair, which requires installation of the oil filter to reduce pollution levels. Filtration precision: axial piston pump 10 ~ 15μm, vane pump is 25μm, the gear pump is 40μm. Pollution wear pump can be controlled within the allowable range. Currently the increasingly widespread use of high-precision filter pump maintenance can greatly extend the life of the pump. Insufficient pump flow problems (1) inhalation volume. The reason is that the suction piping resistance is too large or if less than oil. As the pump speed is too large, the liquid level in the tank is too low, into the pipeline leak, oil filter blockage. (2) excessive leakage. The reason is that the gap is too large hydraulic pump sales, caused by poor seal. As with the oil pan is metal fragments, iron and other scratches, face oil spills; variable mechanism in a one-way valve sealing surface with the bad, the bearing surface pump and oil pan or grind marks and other trachoma. Can determine the site of the pump is damaged by checking the hydraulic oil in the pump body mixed foreign matter. (3) hydraulic tilt plate angle too small, little displacement pump, which need to adjust the variable piston, swash plate angle increases. Hydraulic pump repair _ Jing Chong (certified) _ pumps 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.