Agricultural water pump is drought-resistant seedlings of the main irrigation machinery, pumps in the operation will inevitably fail and damage so that can not be normal pumping. Therefore, common faults on the pump must be promptly excluded to ensure farmland irrigation water. First, the pump does not water. The reason for the pump body and the suction pipe is not filled with water diversion, the end of the valve stuck part of the blockage of water filtration, suction height is too high, may also be due to the steering wheel plugging flow path and so on. By examining one by one can be taken to eliminate the end of the valve failure, filling the water, remove the blockage, correct steering, cleaning impeller and other measures. Second, the pump vibration or vibration. The reasons for the installation of the pump is not strong or excessive installation of the pump; motor ball bearings damaged; pump spindle bending or spindle with the motor is not heart, not parallel and so on. By installing a steady water pump or reducing the installation height of the pump, replacing the motor ball bearing, correcting the bent pump shaft or adjusting the relative position of the pump and the motor. Third, the pipeline leakage or leakage. Nuts may not be tightened during installation. If the leakage is not serious in the place of leakage or leakage of cement coated with asphalt or asphalt mixed with the slurry. Temporary repair can be painted wet mud or soft soap. If the junction leakage can be tighten the nut wrench leak serious if you must re-disassembly. Fourth, the filler overheating. As a result of the packing pressure is too tight cooling water into the filler or shaft surface damage. Can take appropriate relaxation packing, sealing tube blockage. Filler wear must be replaced by new ones. Before filling the oil in the oil dip into the circle into the cut into the incision to be staggered so as to reduce leakage. After the last lap packed to install the gland and then adjust the operation tightness. Fifth, the shaft defect. Multi-axis bending due to the impact load, too tight belt pulled or installed incorrectly caused. If the bend is not powerful, manual screw correction can be used, but not too hard. If the pump shaft crack or break, you can take welding repair, welding or calcined, and then by tempering, turning grinding can be. Six is ​​the impeller disassembly. Impeller blade is broken or affected by cavitation and other effects on the surface a lot of pitting should be replaced or plated carbide. When the wear is not large, it can also be poured .In the disassembly, firstly fix the impeller and the pump shaft, loosen the nut or the gear joint screw, and then rotate the thimble screw to gradually pull out the transmission. Then remove the shaft pump shell, remove the impeller to repair shop repair.
