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 sports part surface wear and tear, which requires installation of the oil filter to reduce pollution levels. Filtration accuracy: 10 ~ 15μm hydraulic axial piston pump sales, 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 repair, can significantly extend the life of the pump. Cause: (5) pumps, the oil port adapter or elbow connector "O" ring damaged or bent connector fastening bolts into or out of a flare nut is not tighten pump maintenance, air into the hydraulic system; Remedy: Replace the O-ring, bolt or nut failure reasons tighten joints: (6) Drain pumps, seals and aging; Remedy: replace the seals Cause: (7) pump end or main, driven gear sleeve end face wear or scratch, the two end faces of the sleeve roughness tolerance; Remedy: Replace worn gear pump or pump bushings, wear light when the tablet will face grinding smooth. When the pump is lower than the hub end face on the plane (normal less than 2.5 ~ 2.6mm), such as ultra-poor should be at the hub plus 0.1 ~ 0.2mm copper to compensate for installation; its flatness tolerance 0.03mm The rear axle should be put into the hydraulic test sets | 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 constantly improving innovative ideas will lead crystal create hydraulic and you hand into the brilliant, for a better future!