Don't now about that Hitachi thing we had the VT-8500A manuals I used many times since I was the one there that worked on the things and it was a popular model. There might have been a training manual that was passed out at training seminars. That was pretty common. We were an authorized Hitachi servicer, had a subscription to the printed manuals as long as they were available in printed form.
Anyway you might search ebay and then save the search, set it to email you if one ever shows up.
Meanwhile I will look in my old pile of manuals next time I drag all that stuff out to see if that one escaped the dumpster...
