The bearing is a component sleeved on the pump shaft to support the pump shaft, including rolling bearing and sliding bearing. When using tallow as lubricating agent for rolling bearings, it is necessary to properly add 2 / 3-3 / 4 of the normal volume. Too much volume will cause heat, too little noise and heat! The plain bearing uses transparent oil as the lubricator. Add oil to the oil level line. Too much oil will seep out along the pump shaft and float low, too few bearings will overheat and burn to form an accident! During the operation of the water pump, the maximum temperature of the bearing is 85 ℃ and the normal operation is about 60 ℃. If it is high, it is necessary to find out the reason (whether there is impurity, whether the oil is black or not, and whether water can enter) and dispose it in time!