1, also known as the pump casing, which is the main water pump. Fixed play a supporting role, and connected with the installation of the bearing bracket. 2, the role of the pump shaft is connected by means of the coupling and the motor, the motor torque to pass the impeller, so it is the main component of transmitting mechanical energy. 3, the bearing sleeve is supported on the shaft of the shaft member, there are two kinds of rolling bearings and plain bearings. Rolling refuel using butter as a lubricant should be appropriate generally much volume 2/3 to 3/4 may have a fever, there are too few sound and heat! Plain bearings using a transparent oil as lubricant, fuel oil level line. To much oil leaking along the shaft and drift *, too little bearing but also thermal burn caused by accident! Pump bearing temperature during operation up to 85 degrees in the general run of about 60 degrees, if necessary to find the cause of the high and timely manner! 4, sealing ring, also known as Save drain ring. Too gap caused by the impeller inlet and the pump casing between the water pump high pressure area flows through the gap area of low pressure, affect the pump out water, reducing efficiency! Gap is too small will cause the impeller and pump casing friction wear. To increase the reflux resistance to reduce internal leakage, delay the impeller and the pump casing life with sealing ring in the pump casing and the impeller foreign aid junction edge seal gap is maintained between 0.25 ~ 1.10mm is appropriate.