Grey market machines, got one myself, I find Heavy Equipment Forum to be a huge manual, the people here are great at solving problems. I found a couple of machines that came close, one bigger and one smaller and interpolated the values and basically had to make my own manual. I have a parts book so that helped big time. Check with a Parts Dealer for a parts book they can usually locate them. You can get a manual for the engine from the company who made it. Other than that you’re pretty much on your own.
Good luck !