Pump did not intake water 

  Reason: 

    1. turning wrong or impeller damage

    2. suction pipe plug 

  Solution:

    1.checking turning , and renewal impeller 

    2.exclude plug 

The shaft power is too big 

  Reason:

    1. friction occurred in pump  

    2. damage the bearing 

    3. belt is tie for driving device 

    4. pumping capacity is too big 

    5. rotate speed is too high , medium specific gravity is great 

    6. motor shaft is not parallel to motor shaft , or they are misalignment . 

 Solution:

    1.dispel the friction 

    2.change bearing 

    3.adjust belt 

    4.adjust the pump's operation condition 

    5.adjust rotate speed 

    6.adjust motor shaft and pump shaft 

Bearing is overheating 

 Reason:

    1.too much or too little grease for bearing 

    2.grease in debris 

    3.bearing damage 

 Solution:

    1.add appropriate grease 

    2.renewal grease 

    3.renewal bearings 

Bearing life is short 

  Reasons:

    1.Motor shaft and pump shaft are misalignment , or they are not parallel 

    2.bearing is bend . 

    3.friction within pump or impeller lost balance 

    4.foreign matter went into bearing or the quantity of grease is not reasonable 

  Solution:

    1.adjust motor shaft and pump shaft 

    2.renewal shaft 

    3.Eliminate friction , renewal impeller 

    4.cleaning bearings 

    5.renewal bearing or assemble bearing again . 

Pump vibration , big noise 

   Reason: 

    1.bearing damage 

    2.impeller is imbalance 

    3.the flow is not uniform and the pump is empty 

   Solution: 

    1.renewal bearing 

    2.renewal impeller 

    3.improve the pump feed