Pump damage a variety of reasons, but in essence, the following main reasons: their own quality problems: The main problem is the material, such as pores, burrs, loose materials, deformation, pump bearings after losing precision, Gears beating cause excessive damage and knock teeth; wear: Wear with any equipment parts like roller hydraulic pump repair parts manufacturers, is the inevitable result of the mechanical operation. Under normal conditions of use, due to the long-term effects of factors such as friction and chemical reactions and increasing wear roller hydraulic repair, but with the natural wear and tear. This wear can not be eliminated and avoided. Based on the pressure relief valve closed loop pressure relief, pressure drop when the piston, a roller for the pressure side hydraulic maintenance company, b for the suction side, so the decline in the valve opening, while the slide valve is closed. Pressure relief valve does not work. After work, reversing roller hydraulic pump repair Which is good, b into the pressure side of the pump maintenance force to overcome the spring force of the slide valve spool moves to the left, turn on the paths. So on the cylinder chamber through a, 1,4 and 7 relief throttle, while also helping pump suction pressure relief. Relief speed from 7 to adjust the throttle. How to repair a hydraulic roller | Xi'an Chengtong hydraulic repair | Hanzhong roller hydraulic repair Xi'an Chengtong hydraulic repair Limited. Xi'an Chengtong Hydraulic Maintenance Co. (www.huosu360.com) is Xi'an, industrial maintenance, installation of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xi'an Chengtong hydraulic service leadership with the staff warmly welcome all inquiries negotiations to create Xi'an Chengtong hydraulic repair a better future.