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 hydraulic pump sales, consider using 32 # Fault Cause when cold northern winter special: (3) into the pipeline was severely clogged dirt; Remedy: Remove the foreign body Cause tube failures: (4) oil pump drive gear pump seal damage test, air into the hydraulic system; Remedy: or damaged seals replace aging, O-shaped ring in place when the oil is not zero row folding type variable axial piston pumps swash plate hydraulic pump maintenance to zero is called the median , the output of the pump flow rate should be zero. But sometimes deviate from the adjustment mechanism in place midpoint of the phenomenon, there is still a flow rate output at the midpoint. 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. Hydraulic Agent | crystal create a hydraulic (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.