I have this same exact problem but I'm affraid to even try to take mine apart b/c a few different 'pool guys' have told me that since parts for the Jacuzzi pumps are so hard to come by (or expensive) that I may take mine apart and not be able to put it back together 100%. I've been told to not mind the leak and simply let the motor run it's course until it's time to replace everything.

This creates a dilema for me. On one hand, I have a pretty loud/noisy pump motor situation that can probably easily be fixed by replacing it with a new motor for maybe under $200. On the other hand, if I buy a new motor and put it on only to find out that there are other problems with the pump, then I've wasted the money on the new motor and I have to spend a lot of money for hard to get parts, or I'll just have to get a whole new pump/motor set. It's very frustrating b/c I'm very new to all this stuff and I don't know enough about pump motors to feel comfortable enough to just start taking things apart not knowing what I'm going to find inside or if I'll even be able to get it all back together.

I realize that's not an answer to the original post/question but I just thought I'd share what I've been told and my personal experience with this same problem.