According to the author's experience, take the following maintenance of the correct method of agricultural pumps. First, the installation of the pump group to be accurate and reliable operation may not have significant vibration. If the pump pumping abnormal sound, or bearing hot (temperature higher than 60 ℃) and the shaft seal water seepage greater than 60 drops per minute, we must identify the cause, and timely troubleshooting. Second, the daily screw screwed, such as packing gland screws, water blocking, etc., the use of a suitable wrench, a reasonable torque disassembly, do not use hand-clamp screw to prevent threaded or nut slide; the remaining screws can be Wipe some lubricants or regularly wipe with a tarpaulin rust; drain screw if not easy to use rust easy to die, so buy a new pump, you should put the drain plug screwed off, painted some oil and white lead oil on the wire Exchange oil twice or three times a year. Third, the use of oil-lubricated pumps, lubricants should be replaced once a month; Grease lubricated every six months for a change. It should be noted that the pump with calcium-based grease, sodium-based motor grease, do not use each other wrong. Due to the hydrophilic sodium-based grease, the water pump will be emulsified into water to dissipate foam, and calcium-based grease afraid of high temperature, used in motor, easy to swap out after the temperature rises. Fourth, we can not pumping too much water in order to avoid premature wear and tear of impellers, mouth rings and shafts, but also to try to prevent water shortages. Water running will damage the seal, prone to leakage of the pump, not even the phenomenon of water. Fifth, irrigation and drainage at the end of the season, it is necessary to seriously clean, check the pump and found damaged or deformed can not continue to use the parts to be promptly repaired or replaced, lubricated parts should be filled with the appropriate fuel; Store in a dry place.