<font color="blue"> They cannot find anything that will work. So basically I'm screwed as far as getting it to work. They have offered to bypass the check valve, but that would leave me with cylinder drift, which is not desireable on a top link. </font>
Bob, I don't remember for sure, but assume you have the C&C cylinders with the pilot-operated check valves built onto them?
Your current experience could tip the scale in favor of the Prince control valve with built in PO check valves, at least in my mind. I used the prince control valve with PO checks, but saw no real advantage of doing so, over the C&C setup, aside from the fact that it would allow me to use cylinders that fit my tractor's size requirements better.
The advantage of having the PO check valves on the cylinder in my mind was that the cylinder would still hold position if a hose burst. A second perhaps minor advantage might be that it would be easier to pop hoses of the quick disconnects, as the hoses can remain pressurized when the check valves are in the control valve.
Anyway, if PO check valves like are used on the C&C cylinders are not available in the US, to replace failed units on C&C cylinders, then I am happy I went with the Prince valve section(s) that have them incorporated in them. If I have a problem, I will be able source a replacement part for the Prince control valve here in the US.
At any rate, I have been satisfied with the Prince control valve with built in PO check valves. If anyone wants to go that route I would expect the net result will be the same as going with PO checks mounted on the cylinders.
Now if the application were different, like a cylinder holding up a man lift, which might drop quickly if a hose burst, I would feel differently. But for use on the 3PH of a tractor, either would satisfy me fine...at least until I needed a spare part to keep my unit(s) functional! Then the ONLY one that would suit me is the one that had spares available for it! /forums/images/graemlins/shocked.gif