3 pt hydraulic connections

farmall_h_1944 · Sep 20, 2014

I know this has been talked about quite a bit but would like some input on my specific situation. I know not much about hydraulics other than I know you need a return to the reservoir. I had a loader on my H and the picture shows how the spool valve was plumbed for the loader. The line "in from the tractor" is T to the side and top of spool valve. The one thing you can't see is that there is a line from the PTO pump to the drain on the belly reservoir.

I took off the loader and a put on a 3 pt hitch. I would like to run the 3 pt from the spool valve. The 3 pt has only 1 one-way cylinder on it. What lines would go where on the spool valve? Not sure on the in and outs of the spool valve.

Also, if I did decide to just run the 3 pt from the belly pump, how do you suggest running a return line? Put in a T at the cylinder and run a return to the drain on the belly reservoir? Thanks for any suggestions.

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used red MN · Sep 21, 2014

Since you say your not sure of the in and out of your valve I'd
say the arrows on your photo are wrong. I'd say what you say
is "out to pump" is pressure supply into the valve. The line you
say is "in from side of tractor" is actually the oil out of the valve
returning to the resivoir. Is that a hose splice in the dark part of
the photo behind the tail of the bottom arrow? If so it looks like
the pipe you did not label is the "pressure down" side of the
valve set up to dump into the return line at the tee So I would
say the valve is set up for "single action" or one way as you
call it. The line you call "out to loader" would go to the lift port
of the 3 point cyl. The line you say is not shown is the "suction"
or the feed for the PTO pump. Please know that this is posted
based on 90% guess and 10% IDK. As for using the belly
pump only you will have to get that info from another poster. I
will say it would most likely lift less that way due to the lower
psi output of the belly pump.

farmall_h_1944 · Sep 21, 2014

Thanks. I posted a brighter picture so that you can see the set up better. So based on your what you have said, I will hook the out hose to the 3 pt and the hose from the belly pump (tractor port) to the in line. I will then take the PTO pump off and cap the drain reservoir outlet where the hose is coming out to feed the PTO pump. The old PTO pump is ran by 2 sprockets and a chain and it is out of alignment. Plus I want to be able to use the PTO for a rough cut mower. This is the reason for wanting to use just the belly pump.

I am assuming that the cylinder will drain back to the reservoir through the valve and out the return line i have labeled.

I plan on using my H to do a 1/2 acre food plot so I plan on using a 6 ft disk, a rough cut mower, and a 2 row planter on it. Do you think the belly pump will have enough power to lift these implements? I'd like to buy something a little bigger and newer than the H but my budget won't allow it right now. Thanks for your help.

D Slater · Sep 21, 2014

Need to be there to say for sure. But looks like the spool valve is already plumbed to use single acting. That's the reason for the two lines teed.
Out to loader one goes to the 3 point lift cylinder. One marked out to pump to a side port opening if using the liftall unit. Need to keep the liftall operating rod locked back for use with your valve. Teed line to liftall drain port with a tee and plug.
Or for single acting all you need is a line to a side port on the liftall unit.
Advantage with that is simple and if the unit checks don't leak the 3 point won't leak off unless the cylinder bypasses.
Disadvantage is with a heavy load its hard to control the pressure release and drop with a heavy load on the hitch. Also you won't have the 2 ports unused now for another hydraulic cylinder us if wanted sometime. They can be used with a double acting cylinder if wanted.

DeltaRed · Sep 21, 2014

Should be pretty simple. The valve supply lines should be marked
"inlet/Outlet"(never saw one that wasnt)Since its already installed on tractor,'moot point'..Hook one
port to the three point cylinder.Loop the other port
back to the return.Hook the hoses so the handle will
be the most comfortable/'natural' for you.I prefer
to pull back on the handle to raise.Just switch
hoses if its 'backwards'.

3 pt hydraulic connections

farmall_h_1944

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used red MN

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farmall_h_1944

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D Slater

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DeltaRed

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