After the winter irrigation, the use of a year's pump will be stored in storage. The use of the winter slack season on the pump for a thorough overhaul and maintenance is necessary. After the pump is disabled, it is necessary to release all the water in the pump and the water pipe to clean the external soil so as to prevent the water and body from freezing after the water is frozen. Pump impeller, bearings, beakers and other parts to conduct a careful examination and found that serious wear and tear parts, should be replaced. Do not need to be replaced, use gasoline wash, coated with butter, re-installed. On the bending or serious wear and tear of the pump shaft, should be repaired and replaced, and reassembled. The bottom valve of the pump, elbow and other cast iron parts, should use a steel wire brush to rust net brush, and then painted, and then dried into the engine room or store dry and ventilated place to save. After removing the belt to wash dry, but also hanging in a dry place. Remove the screws with diesel oil wash, and coated with oil, re-install it or wrap with plastic wrap and put away to prevent loss.