2 way Hydralics

The first link works and a valve like that was on probably over half of the Ms and Hs, junk yards ought to be knee deep in them. Also have seen them on E Bay.
 
All inexpensive two way open center valves will work. Pressure from the right side Liftall elbow, to the in port.
Return/discharge to the drain plug in the bottom of the liftall with a "T" for draining. one hose to the extend and one hose to
retract. Bungy the Liftall control lever in the lift position.
Diagram
 
Those tractors do not make enough pressure to split wood. I have a tractor that puts out 2800 lbs, and I use a 4" cylinder. Quite often that is not enough to spit a hard block.
 
Pressure at the end of the cylinder shaft is determined by pump output pressure and the bore of the hydraulic cylinder. if you have a big enough cylinder bore you can get enough pressure to split wood. That being said you would need such a big cylinder bore to get the needed pressure the cycle would be painfully slow. if you double the cylinder bore size you get 4 times the pressure but at the cost of increasing cycle time by a factor of 4.
 
I recall reading the lift-all was a high flow low pressure system. That doesn't make it sound like it would be painfully slow.

I think dad's hope is that it'll be easier than the hand pump splitter we have now.
 
To begin with most wood splitters that use a gas engine have 2 stage pumps. The second stage puts out high pressure at low volume.
Don't know what pressure your H pump puts out but if it puts out 500 psi you would only develop about 7 tons of pressure using a 6 inch cylinder. I have made a few wood splitters and have found that you need to have near 20 tons of pressure to split some of the really tough wood. Also the shape of the wedge is very important. I usually use 1 inch thick plate and sharpen it to edge tapering it back about 1 1/2 inches on each side. This will cut just about anything that doesn't want to split. Even so if you have wood with large knots it may not split it. I'm talking wood blocks 1 1/2 to 2 feet in diameter. I could go into more detail but won't bore you. IMO
 
We've wandered a little from the topic of the Christmas tree valve.

However I'll go here because I started it so I'll try to finish it. I don't know the psi of the H. I do know that my brother bought a 10 ton manual bottle jack splitter. My dad wants to buy a cylinder to hookup to the H to save a bit of elbow grease. We were working on the assumption that the H would have less tonnage than the hand jack but still enough to split the wood we have.

I appreciate the feedback about the use. I don't deny that the old tractors equipment was made for a different use. It's a tool we have though and we're going to try it. I need the valve anyway for a disc (eventually). I can make a 2-way work one way but I want to keep oil on both sides so it don't rust tight. And it would just look silly with an oil reservoir just to keep the unpressurized side lubed.
 

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