I have an M6800 with a cab. It has 700 hrs and I have a loader on it and use it for moving hay and making hay. The clutch pedal is right at the top and I tried to adjust the cable that has 2 12mm nuts on the end that have to be loosened to adjust. I have only adjusted these 2 other times and have only noticed a clutch smell one time in the field when going up a rough hillside and I slipped it a few years ago. The other day the clutch was catching in the middle of the pedal travel and then after some use it was back at the top but it seemed to be slipping at that point for the first time. I have adjusted the cable at least a half inch but it doesn't seem to change anything. Is there another place for adjustment or a secret grease fitting like on the L series. I have priced the parts and mine serial # takes a clutch disc that is $800 other serial #'s the same year have discs that are $300. Why the difference in price? And do I have any cheaper better options besides OEM parts? I can't believe that I am having to possibally replace a clutch in this tractor that I bought new and have been to only operator with only 700 hrs. What a disappointment! I have also had to replace every component in the air conditioning system last year at a shocking cost of over $2500 for parts not including the labor for this. Another BIG disappointment with the orange tractor.