A couple of years ago I tried to get a Bukh workshop manual as a download from the web without success (could get owner's manuals
, but not workshop manuals).
I'm sure you're aware of Bukh Diesel
Uk Ltd (Tel 01202 668840 in the UK) - they will obviously be able to sell you a workshop manual via any one of their main dealers.
There are also a few Bukh dealers in the USA and Canada
- although they predominantly serve the lifeboat market you can bet workshop manuals
would be mandatory for that market.
If you don't mind, let us know if you succeed in getting a soft copy anywhere.