Posted 7/17/2012 09:24 (#2490241 - in reply to #2490223) Subject: Re: 850 Cylinder Drive Belt - Massey Combine
Tip of the Thumb of Michigan
Could be worn or the torque sensing pulley shieve is sticking a little. That would be the movable one on the front. I think I had to replace mine on our 750 as there was a grove worn in the cam.