Cause: (5) pumps, the oil port adapter or elbow connector "O" ring damaged hydraulic agent, bending joints fastening bolts or 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 bushings face wear or scratch, the two end faces of the sleeve roughness tolerance; Remedy: Replace worn gear pump or pump sleeve, slightly flat when worn will face grinding smooth. Its flatness tolerance 0.03mm; the end face of the sleeve is less than the pump hydraulic pump repair, 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 hydraulic pumps, the installation should be put into the rear axle sets A2F quantitative piston has a fixed displacement, hydrostatic drive for the pump or motor in open or closed systems. When used as a pump, flow proportional to the rotational speed and the displacement. Use as a motor, the output is proportional to the rotational speed and displacement and is inversely proportional to the displacement. Output torque increases with the pressure of the high pressure side and low side of the increases. Shaft radial loads; cylinder block and oil pan with spherical surface with oil, the rotation can automatically, the circumferential velocity is small, high efficiency; low noise, this series of products for Cline structure, suitable for open or hydrostatic transmission closed system pump repair | hydraulic pumps | hydraulic factory direct hit grain crystal provided by the Jinan Chong Hydraulic Machinery Co., 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!