Double acting hydraulic cylinder to single revisited

Mtractor · Apr 24, 2015

I wrote the other day about having a 464 IH tractor that has 1 remote for double and 1 for single. Well the one with the single there is detent when you push it down . I took a picture and there is a plug on the single acting remote . If I just return oil from the cylinders to that plug will the loader go down but not have power down .

JimB2 · Apr 24, 2015

Hi Mtractor, on a single acting cylinder there is only one hydraulic line and when the control valve is opened in one direction the high pressure oil flows out extending the cylinder and in the other valve in the other direction allows oil to flow back into the hydraulic reservoir. The only requirements is that there has to be a weight on the cylinder to force the oil back into the reservoir. The first three front end loaders that we had only had single acting cylinders on the lift arms.

Re 464, normally the remotes are double acting. The single acting valve just has a different spool in it and that is why the other hole is plugged. There are youtube videos explaining operation the different types hydraulic valves. BTW the 464 hydraulics are open center.

Hope this helps
JimB

mkirsch · Apr 24, 2015

In a word, no.

That port is blocked off and in fact the plug may be staked in and might not be removable.

All you need to do is drain the oil from the "down" side of the cylinder and install a vent in place of the hose.

Alternatively, you can connect the "down" hose to a fill port on the hydraulic reservoir so it pushes its oil back into the reservoir, and pulls any excess out.

Mtractor · Apr 24, 2015

So I can just put vents where the hoses come out of the cylinders on top. The lower hose coming out of the cylinder will pick up the loader and
hook in my one way valve. Or just dump the oil from the top of the cylinder back into the resivor filler plug. Would either one work?

JimB2 · Apr 24, 2015

Yes, there are special plugs called a vent breather with a hole in them with a screen to keep dirt and bugs out. You want to drain the upper part of the cylinder by putting a hose on them into a bucket and them lift the cylinder to maximum.

See: http://www.wincofp.com/?page=ICDrilldownView&item=ADS+BV-SAE%25238&catID=431
JimB

W_B · Apr 24, 2015

Back in the day we had one tractor with two outlets and one with just one. We had 2 hoses on a cyl. that we used with either one, just had to remember which hose to use on the single outlet one, and tie up the other hose so it didn't get loose and run over by the implement.

Texasmark1 · Apr 25, 2015

Single is just that.....power in one direction.

jm. · Apr 25, 2015

Not to be a know it all but that is exactly what I told you the other day. The valve has the other opening you need it is just not plumbed. Fairly common on that tractor in those days. Just remove the plug there the fitting just like the other there on the valve. Use a rubber hose come out and put you what ever kind of coupling you want to you loader. Fluid will flow out one hole when you move the lever one direction and out the other when you move the lever back the other direction.

Double acting hydraulic cylinder to single revisited

Mtractor

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JimB2

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mkirsch

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Mtractor

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JimB2

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W_B

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Texasmark1

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jm.

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