Do I need a new seal plate?

cholmes28

Well-known member
Jun 9, 2014
213
Marietta, GA
Maybe the seal is in backwards or the impeller is rubbing.

How easily does the impeller turn by hand?
So I just took off the impeller, and noticed that the pump seal thing that looks like a spring, was on backwards. I corrected that, and the impeller seems to spin more freely now. Wired it all up and same issue. It is like a humming sound that sounds like the motor is getting power but not actually running. I am about ready to hire someone to come out and fix this, but hate to pay them to come out only to find out the motor is bad.
 

ccbill

Well-known member
Jul 23, 2021
140
Atascadero, Ca
Pool Size
23000
Surface
Plaster
Chlorine
Liquid Chlorine
You could try to run it with the pump housing and diffuser removed. If it won't spin you could try to give the impeller a nudge, if it runs then the capacitor might be bad. Be careful... you probably should support the motor on both sides so it won't move and be ready to turn it off. The capacitor shouldn't be bad though if it is a new motor.

Or you could also remove the seal plate and see if the motor will run by itself, again secure/support the motor.
 

cholmes28

Well-known member
Jun 9, 2014
213
Marietta, GA
You could try to run it with the pump housing and diffuser removed. If it won't spin you could try to give the impeller a nudge, if it runs then the capacitor might be bad. Be careful... you probably should support the motor on both sides so it won't move and be ready to turn it off. The capacitor shouldn't be bad though if it is a new motor.

Or you could also remove the seal plate and see if the motor will run by itself, again secure/support the motor.
So I removed the motor from the pump housing, and also removed the impeller, and secured the motor, and it runs perfectly - the shaft spins when I turn on motor. So now it seems the motor is fine, and it has to do with my assembly of the parts. Here are some photos of the parts and seals. Do you see anything wrong? The only thing I did differently this time when replacing the motor is that last time I used magic lube on the white ceramic seal (forgot what it is called), and this time I used silicone sealant RTV because I read on TFP that is what you are supposed to use.
 

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Last edited:

JamesW

TFP Expert
Mar 2, 2011
28,264
This rubber part is wrong.

The smooth carbon primary ring should be sitting flat against the white ceramic.

Also, the seal does not seem to be sitting all of the way down on the impeller shaft.

1632514705805.png
 
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cholmes28

Well-known member
Jun 9, 2014
213
Marietta, GA
I looked closer at the shaft seal, and that black rubber washer looked out of place, so I went to the pool store and bought another one, and there is no black rubber washer on it, so I have no idea where that came from, but clearly it was preventing the ceramic on ceramic. I replaced both seals again using Magic Lube, and the pump works perfectly! Thanks for the help on this!
 
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