Pump Motor Noise When Shutting Off

[AGT]

So I will give you the symptoms. The pressure in the filter gauge when down 5-7psi and then I noticed when the pump was shut off I heard the winding down noise. Not like marbles or anything...like non lubricated parts...what do you think?

 

[Beamup]

If it sounds like a loss of lubrication, that's most likely what it is. Have you looked around and below the pump to see if there might be any perceptible leak?

 

[AGT]

There is a line near the suction of the impeller cover and it looks like a crack. I have not seen it leak...at first I thought it might just be a form line from when it was made but I am almost sure its a crack. We have had rain for a while so when its running its damp there but not dripping

 

[Beamup]

I mean in the body of the pump which could produce an oil leak. I wouldn't expect a water leak to cause lubrication problems.

 

[AGT]

Like if it was leak in the seal and then the shaft right....thats would suck. Not that I saw... I will check when i get back. If that happens I might replace being that its an older single speed.

 

[JamesW]

It could be air in the system due to an air leak. Compressed air in the filter can cause the impeller to run backwards when the pump is turned off and cause a sound similar to what you are describing.

Otherwise, it could be the bearing going bad.