Help with floor jack, leaked and won't pump?

TrailBeast said
I have used trans fluid my entire life without one single problem.
It IS hydraulic oil after all, and really the only difference is that it has detergents and friction modifiers in it.
(for a smoother working jack with a cleaner interior) :D LOL

I've used trans fluid, motor oil, 90 weight......whatever I had layin around. And it all worked great.