There might be a ball check valve in that circuit in addition to the regular control valve. The ball may have some foreign material stuck to it that will not allow the ball to seat firmly so it leaks the oil.
We had that design in the forklifts; found one ball that had a piece of metal embedded in the ball. Each time the tilt reached the end of it's stroke, it would momentarily unseat and rotate the ball, allowing it to leak. The purpose of the ball check is to limit the shock when the tilt reaches the end of the stroke; the ball check protects the other hydraulic components from shock damage.
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Today's Featured Article - Talk of the Town: Diesel Vs. Gasoline - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: " I am in the market for an older tractor (to be read... cheap). I have been told a diesel holds up better than a gasoline engine as far a wear, tear, neglect and abuse. Since I am looking at older tractors that have probably been through it all, is it better to buy diesel? I do expect to have to do a good bit of work on
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