satinblack 0 #1 Posted May 21 (edited) Dealer I had said to use 30 weight in the engine and in the hydraulic Trans on my 20h rear.?? Edited May 22 by satinblack Hp Share this post Link to post Share on other sites
kpinnc 12,358 #3 Posted May 21 (edited) On any "classic" Eaton hydro (as in the pic), that is a safe assumption. Go with Rotella 10W-30 or similar. On an older machine with a Sundstrand, it's more complicated. Those hydros originally came with ATF in the transmission. Later Wheel Horse said motor oil was ok, provided you get all of the ATF out first. Personally, I still run ATF in any Sundstrand. Edited May 21 by kpinnc 1 Share this post Link to post Share on other sites
squonk 41,291 #4 Posted May 21 Sunstrands changed to motor oil around 73. I run Mobil 1 10W40 in my 76 C-160. I used 10W30 in the 2 Eaton 1100's I had. 1 Share this post Link to post Share on other sites
satinblack 0 #5 Posted May 21 Thanks ALOT for the information!@ Share this post Link to post Share on other sites
