Can I turn a shaft that has some grooves in it? What would would the min diameter be? I don't think I need to turn it much, but it is definately worn where the seals and bearings go.

My impellor has deep grooves where the wear ring is, it looks like I would need to replace that, correct? Or is this all normal stuff I shouldn't worry about?

Some impellors have grooves cut into them at the wear ring so the water can hold the impellor in place better , or so I was told .

-beerjet-

I can't remember what those impeller grooves are called, but from what I was told by Jim Coffee at Performance Jet, and I know I'm not gonna word this correctly and get flamed for it, but they somehow allow the water to form a "wall" so to speak, creating more resistance to keep water from recirculating around the impeller.


In regards to the grooves in the shaft, where on the shaft are they? If they're where the packing rope seal goes, like beerjet said someone overtightened the packing gland nuts to cause that. I'd just replace the shaft IMHO.

I ended up replacing the shaft and the impellor - Thanks

That's what I did too. 

Of course now I'm wondering if I should have added an inducer. Do I need one? I went from a Berkeley A to an A/T A - those are the ones that are more aggressive alone, correct?

personally, i dont think you ever NEED an inducer.....it just helps in various scenarios

heres some good reading....

http://www.americanturbine.com/products/hp/inducer.htm

we dont need no stinking inducer, just kidding call your pump guy and ask his opinion