I was combining soybeans last week, (weve had a lot of rain here for the past month),under tough conditions. When I took in a large clump and bunged the MF750, I heard a bang just as the separator came to a stop. After unbunging the table auger, feeder-house and cylinder, I noticed that the walker drive was seized. After crawling in on sheets of plywood, I removed a large clump of material at the front of the walkers. The walker drive was still hanging up. Closer inspection showed that the steel fingers under the rear beater had been pushed down, and the front of the walkers were striking the fingers on their ends. I bent the finger up so they would clear the walkers by about 1 inch. From your report, I guess I was lucky non of the walkers got wrecked.