Foxtail, I have had several customers have the same shaft break.Does not matter whether RH or lH,6,8,or 12 row. Breaks in the exact same place every time,right where the collar is welded to hex shaft.We have the same theory about shaft crystalizing in welded area. Had a Dealer try to tell us that AGCO told them that they had problems with quality of hex shafts.Now,if AGCO is getting any warranty claims on this shaft(which I think breaks more often after first year of use)they need to have them sent back for inspection.What we do to fix this problem is pull the shaft out,after it breaks and then turn it around and stick it back in place welding a washer to end of hex shaft so it bottoms against driven gear.Then on the inner end the shaft will be too short to go through carrier bearing.We then weld two 1_2" bolts to side of row unit to mount carrier bearing to and reinstall bearing.After this is done,we drill a hole in hex shaft protruding and install a roll pin so shaft stays in place.Have not had one fail since changing to this set-up.I think a lot of these shafts break well after warranty has ran out,but is do to a manufacturing flaw.Hopefully someone will look into this from AGCO. Hyper Harvest II
