Outlet pressure compensated variable flow pump with outlet pressure is approximately the size within a certain range by constant power curve. When the high-pressure oil from the main body portion through the channel (a), (b), (c) enter the variable housing lower chamber (d), the oil through the channel (e), respectively, into the channel (f) and (h), when When the spring force is greater than the oil passage (f) thrust into the hydraulic servo piston ring area on the lower end of a hydraulic motor, the oil through (h) to the chamber (g), promote the downward movement of the piston variable hydraulic motor repair, so that pump flow increases. When used as a servo-hydraulic thrust piston on the lower end of the annular area greater than the spring force, the servo piston moves upward, blocking passage (h), the oil (g) cavity through (i) the chamber and relief at this time, variable piston move, the variable head angle decreases, the pump flow rate decreases. Cause: (10) hydraulic oil is too dirty. Remedy: Clean the system hydraulic motor maintenance, replacement of hydraulic oil. Cause: (11) pump filter is not blocked from the oil filter dirt effect Remedy: wash with clean oil filter to remove dirt. Cause: (12) oil shortage, oil position is too high, the oil suction pipe is exposed: Remedy: Come to the oil standard position, reduce the suction position. Cause: (13) on both sides of the pump body and pump cover is not cardboard pad; pump and pump cover is not perpendicular to the seal: Liyuan Hydraulic motor _ crystal create a hydraulic (Online) _ hydraulic motor from Jinan Jing Chong Hydraulic Machinery Co. company. 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.