My machine is in the shop right now getting fixed. I broke the hub out of the bracket behind the big pulley then my dealer told me about an updated mounting bracket and slow down kit for the sieve drive. The same time they weld the back of that slip clutch solid to cut down vibration. Mine is covered by warranty for the top sieve, mounting rails, slow down kit, grain pan, and bushings. I have to pay for the shaft that drives the augers under the rotor. I am glad Case is paying for this. I think the slow down kit, stronger mounting brackets and new bushings would be good preventitive maintenance. Your dealer should know about this.