Can't answer for Garrabo, I fill the loader bucket with wet clay and maybe even a couple rocks as ballast.
I don't know that there is a spec for the hoe lifting capacity ... I really doubt Kubota intended it to be used as such. I think of it as undocumented functionality. (The loader capacity is spec'd @ 460#). The hoe's capabilities are dependant on geometry: The boom only lifts so much so high then I have to use the dipperstick. It lifts a lot! ... more than enough to make maneuvering real squirrely on uneven ground and just about enough to make you think twice about doing it again /forums/images/graemlins/wink.gif