No I do not but seems I once found some info on the Net showing a schematic of mine. Back hoes of this nature are pretty simple and if changing hydro fluid and greasing all the points having zerk fittings plus keeping things clean you will be doing a great service to it. Cylinders, hoses and such are pretty standard, nothing odd that I know of so replacement or rebuild is a straightforward endeavor. The control valve body on mine still works as it should and I'd hate to take it apart if needing repair. At the present, I have mostly retired both this tractor and hoe attachment having both a new Kubota tractor and Kubota excavator.
What are you having issues with if any?
Ricn