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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 550 Oliver

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Wayne Six

10-18-2013 19:04:18

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You described the setup hose to each cylinder...push lever and up the bucket goes....lifted some big stuff, too... never really went down well unless you had significant weight on it, otherwise it would just go down nice and slow...with only the buck weight, it was actually very slow...but it did go it does NOT go down at all and in fact sort of creeps upward real slow...only way to lower the bucket now is to shut tractor off and then when you pull the lever the bucket goes down as fast as you want it to...

Understand what you are saying about blocking one port and running both cylinders off the other port... even if the controller is designed to work two cylinders simultaineously, that seems like a good fix....and maybe if there is a problem with an internal o ring or such, maybe one port will let the bucket drop better than the other...just really hate the thought of tearing something apart that handles that much pressure not knowing what it should look like inside... Thank, will try replumbing the outlets tomorrow!!!

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10-19-2013 06:58:59

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 Re: 550 Oliver in reply to Wayne Six, 10-18-2013 19:04:18  
Those 2 ports aren't made to run 2 cylinders at the same time. It's made to run a 2 way cylinder. One port raises,the other port is down pressure on the same cylinder. If you had two way cylinders on the loader,you would need a T on both ports. One side to the bottom of both cylinders,the other one to the top of both cylinders.

It CAN'T work the way it's hooked. You're raising one side of the loader moving the lever one way,the other side of the loader when you move it the other way.

The more I think about it though,I'd put the plug in the port away from you and the T in the one closest to you. I THINK that will let it raise when you pull,lower when you push. Don't mess with the hoses in and out of the sides of the valve going to and from the tractor,those look right. Just change the ones in the top like I said to.

Whoever sold that thing to you needs to be horse whipped. I sure hope they haven't cobbled anything else in the tractor they way that loader valve is cobbled.

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Wayne Six

10-19-2013 07:41:37

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 Re: 550 Oliver in reply to rrlund, 10-19-2013 06:58:59  
The front end loader was always slow coming down...and has gradually gotten slower and slower coming down to the point it does not come down at all now until you shut the engine off, basically turning off the hydraulic pump and letting the oil drain back to the tractor sump.... Both of the hoses to the cylinders would have had to have been providing pressure to the cylinders because I lifted some huge loads of dirt, firewood, etc., and if they both were not providing roughly the same pressure seems like the whole frame would have bent itself to pieces..... It has always worked going up just fine....I am thinking that both lines out of the top are pressure AND drain lines depending on which way the lever is moved...but maybe there are some "O" rings worn out or junk blocking the drain holes somehow that is creating too much pressure to allow the lines to drain while the pump is actually running now days... Do you think that might be possible?

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10-19-2013 09:26:09

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 Re: 550 Oliver in reply to Wayne Six, 10-19-2013 07:41:37  
Plumb it like I told you. There's nothing on that valve but notches in the spool that mover over the holes where the hoses are hooked.

Do you want me to post a link to this on another forum so others can see it if you think I'm wrong?

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Wayne Six

10-19-2013 09:31:18

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 Re: 550 Oliver in reply to rrlund, 10-19-2013 09:26:09  
Have never seen anything like this before so was just trying to explore all possible options before tearing into this thing... Appreciate your expertise, will replumb it with a T fitting as you suggested... thanks for the help...

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10-19-2013 13:26:03

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 Re: 550 Oliver in reply to Wayne Six, 10-19-2013 09:31:18  
Let us know what happens.

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90 Percent Retired

10-19-2013 07:27:02

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 Re: 550 Oliver in reply to rrlund, 10-19-2013 06:58:59  
I agree, but were would the oil from the pump go during the lowering cycle if you plug one out let? creating heat.Over the relief valve Best to tee that port into the return line to the tractor reservoir, (out hose on the control valve)and tee the the two cylinders together, as rrlund suggested.

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10-19-2013 09:24:02

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 Re: 550 Oliver in reply to 90 Percent Retired, 10-19-2013 07:27:02  
There are no return lines to plumb. When you move the lever to the down position,it opens the port and lets the oil return,simple as that. He has to T those hoses and put a plug in the other hole,simple as that.

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10-19-2013 11:04:39

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 Re: 550 Oliver in reply to rrlund, 10-19-2013 09:24:02  
rrlund,IF that is a two way valve??,then he will have to plumb the return(down) side of valve back to the sump or else he will be having pressure that can't get away.IF it is a one way valve then no problem as you say.

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10-19-2013 12:34:46

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 Re: 550 Oliver in reply to massey333, 10-19-2013 11:04:39  
It is plumbed for the returning oil. Look at the pictures. The oil that comes back through the hoses going to the cylinders goes back to the tractor reservoir through the return hose coming from the "out" side of the valve. He has a hose coming from the "pressure" port of his power beyond and the return line from the other side of the valve going back in to the sump. He has that part correct. That's why I told him not to mess with the hoses going in and out of the sides of the valve.

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10-19-2013 13:52:22

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 Re: 550 Oliver in reply to rrlund, 10-19-2013 12:34:46  
You are maybe right,but unless that valve can be changed switched inside like pete23 said,that is a double acting valve with pressure to both ports and needs(should have)a pressure (return line)on that unused port because the pump is trying to put oil someplace it can't go.The loader will go down fine like you are saying,but if that other port is still powered,he still has a problem unless that valve has a float position,then forget what I said because your idea will work fine.

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10-20-2013 07:37:24

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 Re: 550 Oliver in reply to massey333, 10-19-2013 13:52:22  
I can see what you and fixerupper are saying,but let's get the loader working before we totally confuse him. The relief valve will bypass the oil. Once it's working,let him post about the squeal when he lets it down,then we can get in to putting a T in the return line and running a hose from the other top port.

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