Just cracked the lower shoe in two on our 9760.......again! We also did it last year. Last year we put all new rubber bushings in all of the rocker arms (which we also replaced. We put an all new lower shoe in as well. Now 300 hours later, boom, same problem. We did loose a bearing on the shoe drive shaft (pitman arm) a few hours ago. Would this have cracked the shoe? This time it wasn't quite as bad as I heard it banging a little earlier. Last time we sucked half the shoe into the clean grain before the driver heard it. Is this a weak point in the machine? Has anyone else had a problem with this?