slaveToHorses said:yes use diesel rated antifreeze
use engine oil specifically rated for diesels. This is diesel only engine oil and it will say so in big letters.
go to a tractor dealership and get their hydraulic fluid for the tranny. depending on your locale, you might want a low viscosity fluid. The dealer can help you there. Doesn't much matter what kind of tractor dealership you go to, the transaxle/hydraulic pumps all have pretty similar requirements in fluid. These transaxles hold a lot of fluid, more than you might expect so get yourself a big tub to drain it!
Be prepared to chase down a washer for the drain plugs. They might not be reusable.
I am actually a bit surprised that you need to change the hydraulic fluid at 50 hrs. It is usually just engine oil, check/replace air cleaner and torque loader and wheel bolts.
I am good on the engine oil, just wasn't sure of the others. Part of the reason I want to switch out the tranny fluid is not knowing what is in there, as it is a Chinese import. The other reason is at times the clutch does not always engage properly. Might need adjusted as going into the 1000rpm setting is ok, but going straight to 540rpm it grinds at times. Going to 1000rpm then quickly to 540rpm it is not a problem. Also, it does not always stop the implement fully, can tell it is trying to slip.