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single action hydraulic cylinders


 
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shopteacher1
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Joined: 28 Dec 2010
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PostPosted: Sun Jan 30, 2011 12:41 pm    Post subject: single action hydraulic cylinders Reply to specific post Reply with quote

I am building a snow plow unit for my 8n. I have everything except a hydaulic cylinder. All I can find is double action cylinders. I am using the pump on the tractor with a valve that switches from the 3 point hitch to the snow plow, which will power the plow up and then let it down under its own weight.

my question is this, can I use a double action cylinder as a single action cylinder by plugging the outlets where the cylinder would power back? In doing this, would the cylinder retract by allowing the fluid to return to the resevoir and the weight of the blade pushing the cylinder back in?
 
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TheOldHokie
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PostPosted: Sun Jan 30, 2011 12:47 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote

shopteacher1 wrote:
(quoted from post at 16:41:44 01/30/11) I am building a snow plow unit for my 8n. I have everything except a hydaulic cylinder. All I can find is double action cylinders. I am using the pump on the tractor with a valve that switches from the 3 point hitch to the snow plow, which will power the plow up and then let it down under its own weight.

my question is this, can I use a double action cylinder as a single action cylinder by plugging the outlets where the cylinder would power back? In doing this, would the cylinder retract by allowing the fluid to return to the resevoir and the weight of the blade pushing the cylinder back in?


You will need a breather not a plug in the unused work port. That said here is a link to a source with many SA cylindwers to chose from:
SurplusCenter

TOH
 
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John Smith8N
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Location: Edwards, Illinois

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PostPosted: Sun Jan 30, 2011 12:47 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote

shopteacher1 wrote:
(quoted from post at 21:41:44 01/30/11) I am building a snow plow unit for my 8n. I have everything except a hydaulic cylinder. All I can find is double action cylinders. I am using the pump on the tractor with a valve that switches from the 3 point hitch to the snow plow, which will power the plow up and then let it down under its own weight.

my question is this, can I use a double action cylinder as a single action cylinder by plugging the outlets where the cylinder would power back? In doing this, would the cylinder retract by allowing the fluid to return to the resevoir and the weight of the blade pushing the cylinder back in?


That will work, but you will need to vent the other cylinder outlet, not plug it. If plugged, the other side of the piston would get pressure/vacuum as it tried to move and create a resistance.
 
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old
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PostPosted: Sun Jan 30, 2011 1:37 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote

Any place that has those cylinders will most likely also have a vent plug for it. If not you can make your own with a simple plug and drill a hole in it about a 1/16 of an inch
 
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shopteacher1
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PostPosted: Sun Jan 30, 2011 8:10 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote

Thanks guys, you have been a great help!
 
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JDBW1949
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PostPosted: Mon Jan 31, 2011 1:31 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote


I have a related question. I have an old Paulson Loader that has the single acting cylinders and I am trying to install it on a tractor. I have a pump with an "in" and "out", a valve with an "in" and an "out" plus a 3rd connection. My question is how do I connect all the connections? Also the reservoir is the tractor transmission and where to I connect the return to the reservoir?
 
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TheOldHokie
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PostPosted: Mon Jan 31, 2011 3:29 pm    Post subject: Re: single action hydraulic cylinders Reply to specific post Reply with quote

JDBW1949 wrote:
(quoted from post at 17:31:22 01/31/11)
I have a related question. I have an old Paulson Loader that has the single acting cylinders and I am trying to install it on a tractor. I have a pump with an "in" and "out", a valve with an "in" and an "out" plus a 3rd connection. My question is how do I connect all the connections? Also the reservoir is the tractor transmission and where to I connect the return to the reservoir?


That is a lot of questions!!!

It was my impression from the literature on the Paulson site that their 8N loader (trip bucket) was run off the test port by chaining down the 3pt arms and using the 3pt control to raise and lower the loader. Your case is obviously different

If you have a separte pump how is it driven?

The IN on the pump is connected to the tractor transmission.
The OUT on the pump is connected to the IN on the valve.
The OUT on the valve is connnected to the transmission.
The third connection on the valve is connected to the loader cylinders.

Do you have fittings for connecting the IN on the pump to the tractor's transmission?

Do you have fittings for connecting the OUT on the valve to the transmission?

Here are a coupkle pictures of adapatrs I make for connecting an external pump to the tractor sumps.

You can call or email me with questions or assistance getting any additional parts you may need.

TOH
301.655.0631
oldhokie@verizon.net







Do you have fittings for connecting the OUT on
 
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