I have a late model F2 that i've had about 12 years. About 8 years ago, and then again at the end of last season (last field, fortunately!) the seperator fan came apart, locked itself up, shed the belt, etc. I thought the first time was a fluke, but since it's happened again i wonder why. Some of the blades seem to break and come loose, causing the issue. They are held in with large internal snap rings but they all seem okay. Does something foreign (and metal) get into the fan? I didn't see anything and the lower screen thing is intact. Got the old one out (it was easier this time!) and will be getting another one from a salvage yard again. Any ideas would be appreciated. Thanks.