More than likely, it's the .0005 tolarance that the control valve spools are machined to. No 3pt systen that I know of are equiped with a dual pilot check valve installed. You can still have microscopic seepage past new o-ring and poly pack cylinder sealing components. What rate of seep down do you consider exessive?
My 730 Case arms will drift down in week with a 500# load on them, some will drift down while you are having lunch. Cut a 4x4 to length to block up the 3pt if it becomes a problem. I'm sure the remote cylinder you have will drift down for the same reasons.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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