When the bit is not zero fold variable displacement hydraulic axial piston pump type swash plate angle is zero is called the median hydraulic pump at a delivery rate should be zero. But sometimes deviate from the adjustment mechanism in place midpoint phenomenon pump sales, in the midpoint still flow output. The reason is that the position controller deviation, loose or damaged, you need to re-zero, tighten or replace. Pump is not enough to maintain the angle of the tilt angle of the trunnion wear also have this phenomenon. A2F quantitative piston pumps with a fixed displacement hydraulic pump repairs, as hydrostatic transmission 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, in the rotation of the hydraulic pump can be automatically made in China, the circumferential velocity is small, high efficiency; low noise, this series of products for Cline structure for in open or closed hydrostatic transmission system maintenance hydraulic pumps, hydraulic creating crystal 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.