Hi Stephen,
Found a lot of information here:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=72729Not what I wanted but may be useful to you. All I want to know at this time is where do I grease it and how do I slow it down. Sharpening and height adjustment would be handy as well. What I would expect in a basic owner's manual. I will keep looking before I get the spanners out as they are going to be BSW or Whitworth.
I did notice a bit of discussion about rust removal from the tank, my tank is plastic but the attached is the best way I have found for removing rust from iron. Careful if you want to save labels or plates.
Regards Byomarimba