Hystat fluid????

[shinnlinger]

Hi,

Found a junker Airens 15 horse lawn tractor and made it do this....
YouTube - Captain Canaan Rides Again
I also use it to pull my sheep tractor around with it. I have changed the engine oil, but am wondering about the hystat unit. What kid of fluid goes in there? ANd how hard on it am I being????

Thanks.

Dave