Found this discussion also:
http://www.tractorbynet.com/forums/...26-need-backhoe-my-m6800.html?highlight=m6800
M6800 would probably have taken an 11 or 12 ft. BH, which are expensive and rare. Being primarily an ag tractor, there were probably very few backhoes sold for an
M6800, so it's not surprising there's little information about them at this point.
As the poster noted in the link, if you are really determined to add a backhoe to an
M6800, Bradco might be a better bet than Woods for information.
Probably not my business, but is there a reason you're seeking a BH for an
M6800 instead of your MX? The MX would seem to be a more obvious platform for a BH.