I put in the original post that a hose from one cylinder should be run to the other cylinder, then a "T" placed there. A single line then should be run to new single acting valve. I think the one he has is not made to operate a single acting set of cylinders. I have seen that valve before, and IIRC it was not switchable. A picture of one in the archives here on YT, also on an Oliver 55 indicates 2way use Jim
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