pump leak

Hello,

I have a duraglas pump that I have gone through about 4 or 5 motors with in 6 years. I just installed another new one yesterday. I always have a leak problem, though I always install new seals. I have watched multiple youtube videos and looked up various pump manuals (including my own) to ensure I am installing it the right way. It leaks between the motor itself and the back plastic housing. Could it be anything at all besides the seal? I have verified on http://www.ussealmfg.com/ that it's the correct one for my pump with the part number from the manual. from this image the leak is behind part #5 and in front of part #4.
http://cf.mp-cdn.net/56/45/1c45e5187...1e264b3fa1.jpg
it does not leak when the motor is off, and the water stays full in the pump basket area.

Thanks.

Sounds like the impeller shaft seal to me...when you replace the seal, does it stop leaking at all, even for a short amount of time?

Welcome to the forum!

Hello,
I just put a new one in the with new motor yesterday and there is no change whatsoever. the old one was less than a week old too. it fits in so well I can't understand how it could possibly be leaking.

I dunno--but there are others on the forum that probably will. However, traffic is falling off at the forum right now, so it may take a few days before folks check in again. I'll ask Pooldoc to check in here and see if he can offer you any suggestions.

Praise the Lord I finally found the problem. there was actually a crack in the seal plate itself. I was able to block it off and no more leaking.

A question for you, Reebok.

In that exploded view you linked, it appears that callouts #4 and #8 both would be contacting #5. Am I right? If that is true, then you probably need to look VERY closely at the area where they would be touching #5. If there is even the slightest deformation there, you would get a slow leak.

As I don't have experience with pool pumps, I am going by my experience with industrial and automotive equipment.