I just had one additional thought. I did have a weld fail on mine a few years ago that caused the same lack of operation of the pedals. I would suggest that WITH THE TRACTOR OFF you get underneath and look at the pedal mechanism while you have someone else move the pedals. You may see everything moving correctly EXCEPT for the shaft to the transmission. The weld that holds that shaft to the flat plate that the cruise control engages with failed on mine.