[Asia Pump Network News] self-priming pump features a simple and reliable structure, durable. In the normal case of pumps, usually do not need to often open the maintenance. Exclusion can be given at any time after the discovery of the fault. Now, to talk about self-priming pump disassembly and maintenance should pay attention to some of the problems. Self-priming pump maintenance and disassembly First, pay attention to the maintenance of self-priming pump parts 1. Front seal ring, the rear seal ring: When the seal ring wear to a certain extent, to be replaced. 2. Rolling bearings: When running for a long time, bearing wear to a certain extent, to be replaced. 3. Mechanical seal: mechanical seal in the case of no leakage, the general should not open the inspection. If there is any serious leakage at the lower end of the bearing body, the mechanical seal should be disassembled. Assembly and disassembly of mechanical seals, you must gently, pay attention to the cleaning with the surface to protect the static ring and moving the mirror ring is strictly prohibited percussion collision. Leakage due to mechanical seal is mainly due to the friction mirror mirror hair to. The repair method: the friction end face can be polished to restore the mirror. Another reason for the leakage of mechanical seals is the improper installation of the O-rings or the aging of the seals. In this case, the O-ring needs to be replaced for reassembly. Second, self-priming pump disassembly order 1. Remove the motor or prolapse coupling. 2. Remove the bearing body assembly, check the radial clearance of the impeller and the front ring, check whether the impeller nut loose. 3. Remove the impeller nut, pull the impeller, check the radial clearance of the impeller and the rear seal ring. 4. Loosen the set screw of the mechanical seal and pull out the moving ring part of the mechanical seal. Check the fit of the moving and stationary ring end faces and check the sealing of the O-ring. 5. Unscrew the set screw of the coupling and pull out the coupling. 6. Remove the bearing cover and remove the shaft and bearings. 7. The installation can be done in reverse order. Further Reading: pump valve pipe fittings Exhibition Water Expo Xiamen exhibition of marine equipment Internet + Forum Yiwu Fair 2016 exhibition mold top ten brands of the Internet information industry (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / WeChat: 2355962924) http://beng.liuti.cn/ (Service Hotline: 400-6030-811)