Swash plate type axial piston pump generally used to rotate the cylinder, end assignment form. End surface of the cylinder by a double set with a metal plate and steel valve plate consisting of friction, and most are methods using plane assignment, so maintenance is more convenient. Oil pan is one of the key components of an axial piston pump, when the pump domestic pump, high-pressure oil on the one hand the working chamber of the cylinder to the oil pan, on the other hand with the oil pan and the cylinder between film the formation of a hydraulic pressure cylinder so that the cylinder away from the thrust reverser with the oil pan. Cylinder oil pan design of hydraulic compression force Fn slightly larger than the valve plate hydraulic cylinder thrust reversers on Ff, namely Fn / Ff = 1.05 ~ 1.1 hydraulic pump repair, pump working and maintaining a high volumetric efficiency . Cause: (5) pumps, the oil port adapter or elbow connector "O" ring damaged or bent connector fastening bolts into or out of the flare nut is not tight, the air into the hydraulic system; Remedy: Replace the O- pump seals, 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 face wear sleeve or scratch pump sales, both sleeve end surface roughness tolerance; Remedy: Replace worn gear pump or pump bushings, wear light when flat end mill will be 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 domestic pump sets, crystal creating a hydraulic quality assurance (certification), the hydraulic 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 creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.