Hydraulic Connectors: John Deere Review  -- John Deere Tractors Discussion Forum and Review Hydraulic Connectors: John Deere Review -- John Deere Tractors Discussion Forum

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 03-29-2005, 05:31 Post: 108968
bmeyer



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It was a nice day in Central Wisconsin yesterday so I thought I'd drop the snowblower and put on the 210 FEL on my 2210. The SB came off just fine, but the FEL was a different story.

I drove into it and then tried to couple the hoses to the tractor connectors. The bucket ones when on easily. However, I couldn't attach the arm lines to save my life. Being a "newbie" I tried more muscle and swearing, but they wouldn't couple. My friendly dealer took my call and confirmed what I expected - pressure had developed in that arms over the winter and the pin on the male end would not move, thus preventing coupling.

He suggested pressing the "pin" on a hard surface or opening up the fittings a bit. THe first idea didn't work, but the second solved the problem in minutes though a bit messy.

Now the question - how do I prevent this every year? Do I need to prop or support the FEL in storage? Is there an easier way to relieve pressure? Is this a common problem? Did I do something dumb that caused this situation? Help!






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 03-29-2005, 07:40 Post: 108978
beagle

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Common problem that is encountered all the time. The best thing to do is when you remove the loader, shut the machine down and move the joystick in every direction before dis-connecting the lines. If the machine is off, and the loader is in it's store position, moving the joystick will relieve the pressure in the lines. Then disconnect the lines. This isn't a fool proof way to make sure no further pressure builds up, but I think you will find it is a big help. After you turn off the machine and move the joysttick, you will see the loader move slightly as any residual pressure is relelased. Hope this helps.

For future pressure release, make sure you are well protected if you releave pressure at the poppit valve in the disconnect. Hydraulic fluid under pressure can cause serious infection and even gangrene if it hits you unprotected.






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 03-29-2005, 09:10 Post: 108985
DRankin



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 Hydraulic Connectors

I think temperature can affect the residual pressure too. Drop the FEL and relieve the pressure on a cold day and wait for a warm day to put it back on and you will have the same problem.

I fooled around with ways to relieve the pressure, including pressing the fitting on a hard surface, rigging up screw clamps, etc, and decided it was just to dangerous.

Now I get a couple of wrenches and loosen a coupling until the fluid weeps out and then tighten it back up and connect it to the tractor.

That keeps it out of my eyes, off my clothes and keeps me out of the E.R.






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 03-29-2005, 10:39 Post: 109000
Murf

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We use a rather more simple method, we prevent the problem in the first place.

When we drop anything onto cylinders we block the cylinders with a peice of tube cut in half lengthwise. This mechanically holds the cylinders at a set opening and prevents a load shifting from creating pressure. If you also cycle the cylinders with the engine off before disconnecting it helps to allow for some changes without over pressuring the system.

If it is a chronic unavoidable situation then a small change in your lines makes a big difference, it's handier sometimes too.

Merely swap two of the fittings, female for male, that way the two flexible lines left dangling can be looped together, any change in position then no longer presurizes one side of the circuit.

If this is not possible the next best solution is a 'bleed box', a small VENTED steel tank with a pair of short lines running to it and a quick connect fittings. When you park the implement connect the line from the bleed box to the line that will get compressed from sitting only. This way it cannot build pressure and any that does can be released safely and reasonably neatly.

Best of luck.






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 03-30-2005, 06:03 Post: 109067
bmeyer



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Thanks for the suggestions - sounds like I'm not alone! Now I don't feel so dumb!

Murf, I'm interested in your idea of swapping ends. But could I accomplish the same thing if I just got two female ends and connected them with a nipple. THen I could connect the two loader arm lines in the same manner you suggest in your "bleed box" example. Would this allow for equalizing pressure too?






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 03-30-2005, 07:33 Post: 109073
JAZAK5



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 Hydraulic Connectors

That dealer just wants to sell you more hydraulic ends !!!!
After doing the "press the pin into something hard thing" and trashing a coupler at $10.00 a piece. All I do is take two wrenches and bleed the pressure off






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 03-30-2005, 07:51 Post: 109079
Murf

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bmeyer, yes it would do exactly the same thing. In fact a pair of short lines with a high pressure valve between would be even better, it would allow a controlled release of pressure. You would need to loop them together right after disconnecting them from the tractor though or you would face the same problem.

You also need to physically block any cylinder looped together since it will no longer hold pressure and therefore could allow movement.

In our case we use a bleed box because during fleet maintenance there are many times when you want to drain off a little fluid to bleed the air out of a line. Linking them together just moves it from one line to the next.

Jazak's idea works too, it's just a little messier.

Best of luck.






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 03-30-2005, 08:12 Post: 109080
beagle

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Not sure about how the JD loaders store, but with my Kubota, as long as I relieve the pressure before disconnecting the lines, and let the loader settle at rest, I haven't had a single problem in two years. Don't relieve the pressure, and it's sure to pressure lock as it settles.

I also store it inside the barn so I don't have the problem of the sun warming the loader.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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beagle 2 | bmeyer 2 | DRankin 1 | JAZAK5 1 | Murf 2 |




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