Does anybody know where I could get some tech information on a Schwartz pto driven hydraulic hoist. I have one under my one ton. I specifically need to know what kind of oil to use in it. It was low, so I put modern hydraulic fluid in it, but now it works even less good, so assume I have the wrong oil in it. I plan to drain it all, and don't want to play the "hit and miss" game with replacement oil.
