First, the motor shaft is not rotating 1. No power to check the electrical and troubleshooting II, a heating of the motor trip, the relief valve regulator is too high, after the super stuffy load pump regulator pressure relief valve 2, the relief valve spool stuck spool center hole blockage or overflow valve orifice blockage caused by overpressure valve does not overflow overhaul boring 3, the pump outlet check valve installed backwards or death card bored spool valve 4-way pump repair, motor Troubleshooting three or replace the motor, shaft or motor shaft no linkage 1, replace broken key 2 key four missing equipment retro-fitting, slide vice stuck inside the pump 1, with the gap is too small to open repair, as required matching gap 2 , part accuracy, poor assembly quality, gear and shaft concentricity error is too large; plunger head stuck; vertical vane difference; the difference is too big swing rotor, the rotor slots have wounds or injuries blade fracture after the force stuck replacement parts, reassembly, so that with the gap to meet the requirements 3, check the oil is dirty oil, replace the oil filter or 4, the cooling effect of high oil temperature thermal deformation inspection cooler parts, check the fuel tank and fuel Come to the oil level line 5, the pump suction chamber into the dirt and stuck open the cleaning and installing oil filter [Company Name] Tengzhou Lung Machine Co., Ltd. [sales manager] Mr. Sun Sales Hotline [0632] In the suction port -5878718 [Business Phone] 15165871095 [Main product] small hydraulic machine four-post hydraulic machine of small hydraulic machine gantry hydraulic machine, hydraulic machine, single-column hydraulic machine universal hydraulic machine three beam hydraulic machine presses of 4 four-post three beam hydraulic machine hydraulic machine [company website] http: // www.youyaji1.com http://www.yeyaji1.com/ http://www.yyj-yx.com/ http://www.hengnuoda.com/ http://www.yaliji1.com/ [Address ] Tengzhou Development Zone Industrial Park in Southern District