Summary of maintenance methods for self-priming sewage pumps

(1) Check the sewage self-priming pump pipeline and connections for any looseness.

 Rotate the sewage self-priming pump by hand or with a tool to check its smoothness.

(2) Control the flow rate and head of the sewage self-priming pump within the range 

specified on the nameplate to ensure it operates at its efficiency point and achieves maximum energy savings.

(3) During operation, the bearing temperature of the sewage self-priming pump should not 

exceed 35°C above ambient temperature, and the ambient temperature should not exceed 80°C.

(4) If any abnormal noise is detected in the sewage self-priming pump, stop the pump 

immediately and check the cause.

(5) When stopping the sewage pump, first close the gate valve and pressure gauge, then stop the motor.

(6) When the self-priming sewage pump is not used for a long time or during cold winter months, 

after stopping the pump, unscrew the drain plug at the bottom of the pump body to drain the 

medium completely to prevent freezing and cracking. (If it is sewage, please clean the pump chamber with clean water)

(7) Carefully listen to the running sound of the motor to see if there is any abnormality. Because

 the noise in the machine room is relatively large during operation, you can use a screwdriver or

 a listening rod to listen close to both ends of the motor. If you listen frequently, you can not only

 find the abnormal vibration of the motor and its driven equipment, but also judge the amount of

 bearing oil inside. In this way, you can take appropriate measures such as adding bearing oil or

 replacing the bearing in time to avoid the motor bearing from being blocked due to lack of oil 

and dry grinding, running out of the outer circle, or burning out of the stator.