80-55 irrigation water pump 1)Lift:55m 2)Flow:65m3/h ... construction, factory and mine.PrincipleYou should fill the pump with water before start, then the impeller rotate with ... exceed 75°C. If stop using for a long time, you should discharge the water in the pump, overhaul and ... is too high1,adjust2,pump shaft bended2,adjust or replace3,bearing wear seriously3,replace bearing 80-55 irrigation water pump