Jim Becker said: (quoted from post at 20:20:57 07/20/08) Your whole set-up sounds a lot like what was done for front end loaders. Some loader manufacturers used Gresen valves. They made a #300 valve for one-way cylinders and #400 for two-way cylinders. The #300 had a plug (more towards the handle) that looked like it should be the place for the second non-existent hose. I don't know if that is what you have or not.
I bet it had a loader, as the block looks to be replaced (i had a previous post on that subject).
do you have more info on the Gresen valves? Is there an easy way to identify if i cannot find the number? mine has a flat screw head pipe plug in the drop port, it might be a 300 but could be a 400 plugged. Does the 300 have internal relief when in the drop position? How about a relief valve?
Also do you or anyone know if the sandwiched block takes pressure from the pump first or after it has circulated through the touch control? If it is directly from the pump and the Gresen has no relief valve then I'll have to add one, as hitting the end of the stroke or any other dead head will ultimately cause damage, if it hasn't already. Do not have enough time operating to observe the pump seal leakage yet.
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