Well I watched a really nicely done Youtube video of a guy changing out the bearings. To be honest, it looks like a PITA especially if I have to run around and get other parts for the motor after I open it up and perhaps find something else worn.

So I think I will just buy a new motor, and install it on the old pump.

Interestingly the motor has been running quiet for nearly 24 hours, after I turned it off for a few seconds and turned it back on.

Thanks