I noticed when I opened my pool last month that my pump wasn't quite working right...I have a Whisperflo 1hp Pentair pump.
I figured out that the impeller (which is all plastic, by the way) wasn't rotating, so I removed the bolts and forced the impeller to turn manually, then re-assembled the pump and voila-it worked. I'm on a timer, and I noticed today that the problem had returned (probably has been there all along, but I haven't had much time to observe it until today). In fact, after about 30 seconds something tripped and the pump turned itself off.
I know I've probably just about ruined my pump, but is there a way to lube the inside of the pump, or the impeller, to squeeze a little more life out of it?