Hayward pump shaft seal leak after 3 days of new motor install/replacement

[dealdoug]

So I replaced the motor on a Hayward max flo pump sp2807x10 because motor was getting louder. There were no apparent leaks before replacement. Motor was approx 6+ yrs old. Had weg 1hp replaced with century 1hp same model ust1102/56j.
I have replaced motor and seals before so I know seals were installed correctly.
Within a couple days there was a leak from the shaft seal dripping between mounting plate and motor face.
Replaced seals again but began leaking again.
Replaced impeller with new seals as a precaution for possible wear on the shaft same result.
Then reinstalled old motor with seal that was leaking on new motor and no leak was apparent after a couple days.
Last attempt reinstalled new motor with new seal and leaked after 3 days.
I considered shaft being bad but there is nothing apparent. See video below.
No leaks from housing seals.
I assume it's a bad motor but looks good to me.
PS I even tried a used spare seal plate/mounting bracket with the I had laying around with the new motor, no difference.

Video of running motor shaft

Any ideas? Thanks in advance.

 

[JamesW]

The ceramic is too black, which indicates a cheap seal or incorrect installation.

 

[JamesW]

What seal did you get?

 

[JamesW]

If the seal is from Amazon, it is probably cheap junk.

Get the good seal and use seal lube to install the seals.

Edit by Jim R.

 

[dealdoug]

The ceramic is too black, which indicates a cheap seal or incorrect installation.

View attachment 556163

I don't know which one is pictured but I have tried 4 or 5 different ps-201 seals. Some from Amazon, online pool store and the latest was a branded Flow serve ps-201 from local motor/pump company. You can see the last one on the impeller. All had the same results. Do you see something installed incorrectly?
I used magiclube blue cap lube.

 

[JamesW]

https://www.youtube.com/results?search_query=hayward+maxflo+seal+replacement

 

[dealdoug]

https://www.youtube.com/results?search_query=hayward+maxflo+seal+replacement

Thanks, I've watched that I did exactly as described.

 

[JamesW]

https://thepoolshoppe.ca/wp-content/uploads/2014/03/hayward-max-flo-manual.pdf

 

[JamesW]

Get the PS-3868 and use Seal Lube to install.

 

[dealdoug]

Get the PS-3868 and use Seal Lube to install.

I will try that one but any idea thoughts on why old motor no leaks, new motor leaks?

 

[JamesW]

Link to the motor you got?

 

[JamesW]

Had weg 1hp replaced with century 1hp same model ust1102/56j.

Does the label say Century?

If you got the motor from Amazon, it is probably cheap junk.

 

[dealdoug]

Does the label say Century?

If you got the motor from Amazon, it is probably cheap junk.

No I bought from inyo, definitely a century motor. Says Century. Which is better century or weg? All the clones on Amazon look like the century.

 

[JamesW]

Ok, I do not know why there would be a difference.

Maybe the shaft is a different length?

 

[dealdoug]

Ok, I do not know why there would be a difference.

Maybe the shaft is a different length?

That's exactly what I was thinking. I think the old WEG is longer. It's hard to measure precisely from the mounting screws. The shaft itself from the bearing is definitely shorter on the century. Would that upgraded seal make up for the difference?

 

[JamesW]

Maybe the new shaft is too short causing the seal to be too tight with too much friction?

I really do not know.

 

[JamesW]

Is the spring completely compressed when you screw the impeller on?

 

[dealdoug]

Is the spring completely compressed when you screw the impeller on?

Well the thing I noticed is that the impeller goes all the way to end of threads and locks. I never remember feeling that, just screwed it in snug. But it seems like it happens now with both motors but more so with the new century. Idk very weird situation.

 

[1poolman1]

That's exactly what I was thinking. I think the old WEG is longer. It's hard to measure precisely from the mounting screws. The shaft itself from the bearing is definitely shorter on the century. Would that upgraded seal make up for the difference?

Upgraded seal is a Viton seal (better material), the dimensions are the same as well as the dimensions on the motors.
Be sure to NOT use seal lubricant on the sealing faces but only on the impeller shaft and the cup the ceramic inserts into. That's what seal lube is for, so the rubber parts get a good seal in those areas.
Be sure that there is nothing in the cup of the sealplate that is interfering with the ceramic seating completely to the end and also that it has no cracks. They are very hard to see, but those areas do crack at times.

 

[dealdoug]

Thanks for the suggestions, I will try the viton seal and see what happens. I noticed the seal I used is marked 201CV and looks like the 3868 pictures online. I wonder if the V is for Viton?