Geez Louise 2

[aquaman]

I put a new seal and plate on the pump.

When I hand tightened the impeller onto the shaft (one last good tight turn) it became clear that when I hand turn the impeller I get resistance and some rubbing.

Did I overtigthen? Do I back it off?

 

[Bama Rambler]

It won't do you any good to "back it off". If you do, the first time you start the pump it'll just screw itself back tight. You didn't leave a shim out did you? There should be a little resistance from the seal but no rubbing.

 

[aquaman]

So there is never a need for porcelain to wear/rub down a little at first?
New AO Smith pump with a new seal plate.
The shaft has a rubber washer (actually pretty thick). Hope the heck that wasn't packing material!
Tapped the shaft seal into the seal plate with a PVC pipe of same size (I tapped metal flange all the way down flush with the plastic of the plate --> meaning seated it deeply- I seemed to have to tap it more than people on youtube videos).
Put other porcelain shaft seal into impeller -seems flush.
When I firmly hand tighten I imagine the noise to be this porcelain rubbing.
SHIM-- another spacer?
My total:
rubber washer at base of shaft against motor body
seal plate with seated shaft seal
impeller screwed on to shaft with shaft seal in back of impeller
I can turn impeller nearly as freely when it is making this rubbing noise, but not as freely as when I back off the tightening a little.

Again, if I could have disassembled the pump to begin with I could have retraced the parts..arrghh

 

[aquaman]

Last question on this -- The rubber washer at base of the motor's shaft -- it is meant to have the seal plate and its shaft seal go up against it yes?