AC model 170 fluid?

I'm really glad you asked this question. You sound like someone who really cares about the big orange machine, and that makes me smile :-)
When I first got involved with my AC 170, all I could think about was getting that thing really working well. I went out and greased that thing until there were gobs of grease oozing from every orifice on that baby. It worked GREAT!
I suggest that you do the same.
However, it had sat so long , that once I got it going I had a few leaks that literally scared the happy-jacks off me. Well I eventually got those fixed and now I'm looking forward to bringing in the crops.
The next thing I did was go out and get my hair cut like a darn Marine. It felt great. I suggest you do the same.
Well, one last piece of advice, I suggest you get somebody who really knows tractors to help you. Like a young son or the like.
Well it was great talking to a fellow AC'er. P.S. I hope your crop doesn't turn to crap while your trying to get the big orange lady back in service.
Talk to you soon.

Bill