Backhoe stack valve plumbing

[Trucker1]

Hi all,
I've been searching and I can't figure out the answer to my question.

How can you tell which way the flow goes on a backhoe stack valve?
There are no markings that I can find to show the in/out direction. This is an older Kelley backhoe with just a hydraulic line on each end of valve bank. There is a pressure guage and relief valve on one end. Is this the "in" end of the valve bank? I haven't been able to verify this for sure. Any help is appreciated, Thanks

 

[J_J]

That appears to be correct, a relief and gage would be on the input side. With it connected to the hydraulics, you should show low to some pressure, and if you activate a valve and hold it, the relief will activate and show the relief pressure on the gage. The system pressure should be higher than relief pressure.

 

[Trucker1]

Thanks JJ,
That was the line of thinking I was on. I hooked it up that way and pressure shows real low; then, when I operate a cylinder the pressure comes up a little til it gets to end of stroke and then jumps to 1800-2000 psi on relief. I just wanted to be sure I was going the right way with it.
Thanks

 

[J_J]

Sounds like you have got a handle on it. You are one of a few that have a gage in any hydraulic circuit, and it would solve many questions that are asked on this forum.