m371

Hello hello there, New to the forum world and thought this one looked quite informative. I just purchase a lil m371(still not sure why but it looked cool at the time) and really don't know anything about this older type of machine as far as what type of fluid it uses. Some say ATF others say motor oil or hyd oil. It appears to have oil in it with a hint of green tint to it in the right light so I'm guessing its hyd. weather its suppose to be or not who knows. Trying to locate a free owners manual to download online just to learn a little bit about it but really having bad luck with that idea so far. Any good sites to locate one out there? Also putting in a new 16hp motor and should be up and running to play with after that if all goes well. I'm using the stock 3 pulleys off the old motor and need belts yet. It appears the one for the pump is a smaller belt like an "A" something and the other for the high or low drive is a "B" size and have no idea what length to start with. Any help would be great. Thanks!