First, check the power supply: whether the connector is firmly connected; Whether the switch contact is tight; Whether the fuse is broken; Whether the three-phase power supply is equal. In case of open circuit, poor contact, fuse fusing and phase loss, find out the cause and repair it in time. Secondly, check whether it is the mechanical fault of the pump itself. Common reasons are: the packing is too tight or the impeller and the pump body are blocked by debris; The pump shaft, bearing and leakage reducing ring are rusted; The pump shaft is severely bent. Troubleshooting: loosen the packing and dredge the drainage channel; Disassemble the pump body to remove impurities and rust; Remove the pump shaft for calibration or replace it with a new one.

Water pump heating

Cause: bearing damage; The clearance of rolling bearing or bracket cover is too small; The pump shaft is bent or the two shafts are not concentric; The tape is too tight; Lack of oil or poor oil quality; The balance hole on the impeller is blocked, and the impeller loses balance, increasing the thrust to one side. Troubleshooting: replace the bearing; Remove the rear cover and install a gasket between the bracket and the bearing seat; Investigate the pump shaft or adjust the concentricity of two shafts; Adjust the tape tightness properly; Fill with clean grease, which accounts for about 60% of the clearance in the bearing; Remove the blockage from the balance hole.

Water pump

Water pump

Unable to absorb water

The reason is that there is air in the pump body or there is air accumulation in the water inlet pipe, or the bottom valve is not closed tightly enough to fill water, the vacuum pump packing leaks seriously, and the gate valve or flap valve is not closed tightly. Troubleshooting: First, increase the water pressure, then fill the pump with water, and then start the machine. At the same time, check whether the check valve is tight and whether there is air leakage in the pipeline and joints. If air leakage is found, apply lubricating oil or mixed paint on the joints after disassembly and tighten the screws. Check the oil seal ring of the water pump shaft and replace it with a new one if it is seriously worn. The pipeline leaks water or air. The nut may not be tightened during installation. If the leakage is not serious, cement or cement slurry mixed with asphalt oil can be applied at the place with air or water leakage. For temporary repairs, apply some wet mud or soft soap. If there is water leakage at the joint, the nut can be tightened with a wrench. If the water leakage is serious, it must be disassembled and replaced with a cracked pipe; Reduce the lift and press the nozzle of the water pump into the water for 0.5m.