Have always had a problem with the chaffer frames cracking on the STS's that I have seen, we have solved the problem by welding a peice of angle iron to the middle of the chaffer frame at the rear (right over where the adjusting mechanism is) a six inch piece seems to work well. dont know if this will work on the 60 series w_ the electronic adjusters. seems JD could find something better than cheap pot metal to build those frames with. traded a 900 hr machine with w_ original chaffer and angle iron mod. new machine had less than 300 hrs and chaffer was cracked, luckily we saw it before we left the dealer w_ the machine.
