Does it have JD factory single disc fertilize openers?.There are left and right openers and you should have a equal number of each?.Could be it was set up with more of one than the other and that could make the planter want to pull un-even.

This is assuming the fertilize openers are the same on the 1760 planter as what was on a 7200 planter?.Can't say i have paid any attention to what openers they are using these days as we switched to Yetter openers the next year after running the JD's for a season.Still running the Yetter single disk and knife setup on a 16 row 7200.