Thanks Terry!
This machine doesn't leak a drop of anything but the original owner told me that he never changed the hydro fluid. Two or three times a year he'd put it on a grade and change the filter losing as little fluid as possible and refill. I've heard more than once that this is acceptable but I don't care for the idea a lot. The fluid looks perfectly clean but it must break down somehow. That said, everything does operate smoothly and continuously on any surface.
Joe
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