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Message: <blockquote data-quote="Mike10" data-source="post: 48109" data-attributes="member: 5461"><p>There is nothing in the control valve, if the spools are centering when released, that would cause both bucket and lift cylinders to leak down at the same time except for a possible crack in the valve itself which is unlikely.  That only leaves  the cylinders and lines.  There is always some leakage past the valve spools that will allow the cylinders to drift down over time, but if the cylinders leak down fast I still say it is the seals in the cylinders.  It only takes one lift cylinder that has bad seals to cause the boom to leak down.</p></blockquote><p></p>