The cause of the heat pump

The cause of the heat pump.

 There are several reasons for water pump heating: bearing damage;Small clearance between rolling bearing or bracket cover;Pump shaft zigzag or two axis different heart;The tape is too tight;Lack of oil or oil;The balance hole on the impeller is blocked, the impeller loses balance and increases the thrust to one side.Cleaning method: replace the bearing;Remove the rear cover, and install the gasket between the bracket and the bearing seat;Query pump shaft or adjust the concentricity of two axes;Proper tightening of belt tightening;Add clean butter, and butter is at the disposal of 60% of the space in the bearing;Remove the obstruction in the balance hole.