Anyone have experience with centrifugal clutches on Salsco 810M chippers? Or perhaps other machines with centrifugally engaging clutches? Mine has a rhythmic chirping sound when idling, clutch not engaged. I also noticed yesterday that the cutter disc was rotating slightly before the clutch was engaged, while the machine was still idling. Possibly bad throwout bearing? My main question is how to remove/re-instal the main drive belt to get into the clutch drum? Do I need to loosen the engine mounting bolts, to back off the drive gear? Any familiarity with this machine will be greatly appreciated, Thanks.