I have a JD4200 with R1 tires and have put a 60inMMM on. The right side tire bumps the front mower tire and the back tire does not allow the mower to be lifted up all the way. Anyone have and ideas on how to adjust the mower?
I have a 4200 with R-4's and a 60 inch MMM and everything fits fine. The yoke and clevis and the draft rod clevis specs have a couple inches of adjustment play which should be used to work around tire size variance. (See page 6 of the operator's manual).
My 60"MMM also hits the right front tire enough to tear up the rubber on the outboard edge during sharp turns. the only reason I can come up with is the position of the front tires. I chose to place mine in the wide position for maximum stability. As for the rear tire problem you're having, I'm running R4's which might be somewhat smaller in dia.