Piston pump is a reciprocating pump, volume pumps belong, an eccentric shaft which is rotated by the piston-driven hydraulic pump, a reciprocating movement, its suction and discharge valves are a check valve. When the plunger is pulled outside the working chamber pressure is reduced, the outlet valve is closed, lower than the inlet pressure, the inlet valve opens service pumps, liquid enters; when you push in the piston pump maintenance, studio pressure increases, the inlet valve is closed, Above the outlet pressure, the outlet valve opens the hydraulic pump detected liquid discharge. When the cylinder drive shaft rotates, the swash plate plunger is pulled out from the cylinder or pushed back, complete oil suction process. Working piston and the cylinder bore cavity consisting of oil through the oil pan, respectively, with the pump suction, drain cavity. Variable mechanism for changing the swash plate angle by adjusting the swash plate angle can change the pump displacement. Cause: (1) hydraulic oil tank is too low; Remedy: Add hydraulic oil Cause Failure: (2) No seasonal use of hydraulic oil; Remedy: usually applied 46 # hydraulic oil (or 68 #), no need for special replacement When special cold northern winter, consider using 32 # Fault reasons: (3) into the pipeline was severely clogged dirt; Remedy: Remove the foreign body Cause tube failures: (4) oil pump drive gear oil seal is damaged, the air into the hydraulic system; Remedy : or damaged seals replace aging, O-rings domestic pumps | hydraulic preferred crystal Chong (certified) | 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.