assuming you actually have an 800 with a 3pt hoe or sub framed backhoe, AND a working pto and 3pt hitc, and not a industrial model that has no hitch or pto, then it's a simple matter of manually removing the hoe via 3pt linkage, bolts, braces, etc. perhaps a subframe, maybee even a subframe that ties to the loader. Of course removing hyds.. and depending on how they are plumbed, they might need to be looked.
post pics of what you have.
does it have a pto pump driving the hoe?
is there a front pump driving the laoder that also feeds the hoe?
is it all running off tractor hyds via a remote under the seat ( real real slow.. but does work.. )
post them pics.
front, side rear, and rear up close of the union of the hoe to the tractor rear end.
also, welcome to TBN!
soundguy