tj
Guest
A bad rotor drive belt could cause vibration which would cause cracking, if left long enough. Not likely that the rotor shaft would be bent, however. You should look at the rotor, though. If a stripper mount on the rear of the rotoris crushed or has pieces missing this would cause the same problem. If there's a chopper installed, I would probably look at it first. It sounds like it might be throwing stuff back at the machine--worn hammers will do this, and can be very badly imbalanced. Hope this helps.