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Message: <blockquote data-quote="imtools" data-source="post: 120103" data-attributes="member: 10415"><p>A falling bucket when the unit is not running is not indicative of a leak past the piston. Assuming the lift is enacted by hydraulic oil entering the side of the cylinder opposite the rod, consider this: every inch worth of oil on the non-rod side would occupy more than an inch on the rod side thereby locking the piston in place. The oil has to go somewhere, either leaking out the rod seal (obvious) or thru the return side of the valve. This is not to say that the problem here isn't a leaky piston, just saying that in a static mode, a psiton leak has to be along with another leak.</p></blockquote><p></p>