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Tractor Talk Discussion Forum

JD Hydraulic outlets leaking

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Dieselrider

05-11-2004 16:39:49




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I have replaced the o-rings in both sets of remotes on my 2640 with aftermarket o-rings and they don't appear to leak until I hook up to a remote cylinder and turn them on. Then alot of hydraulic fluid flows out the bottom of the break away coupler unit. I used 2-3 gallons planting half acre of sweet corn today. Could it be that the units are shot or could the o-rings be bad still or just the wrong ones? I fear JD is going to want alot for the rebuild kit, about $80 per side which, I believe is no more than about $1 worth of o-rings. Should I consider changing from the stock John Deere breakaway couplers to something else. Has anyone else had this problem before and if so what did you do to handle it? Thanks, I could really use the help.

I either have to stop the leaking or find hydraulic fluid that is high in nitrogen and leave it as is for side dressing.

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ron

05-12-2004 01:38:49




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 Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 16:39:49  
i have a 4020 john deere. have had problems over the last several years with quick couplings leaking. replaced o rings 2 or three times with john deere parts. leak would stop for a short time then resume and get worse over time. over the past winter i replaced both barrels and that seems to cure the problem. its nice to not have to add hydraulic fluid any more or have the leaking mess down the back end of the tractor.

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Dieselrider

05-12-2004 03:34:21




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 Re: Re: JD Hydraulic outlets leaking in reply to ron, 05-12-2004 01:38:49  
Ron, Did you use the kit from JD or used parts, or what? By the barrels, do you mean the whole inside?



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Mickey

05-11-2004 18:24:40




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 Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 16:39:49  
If you take it apart again use the 20 series old style o-ring/backup ring combination on the barrels. They make the couplers slide harder, but they work better than the cup seals on worn couplers



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thurlow

05-11-2004 17:37:21




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 Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 16:39:49  
How badly are your hose ends worn? I have seen rusted/pitted male couplers cause the problems you're having..... .....



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Dieselrider

05-11-2004 18:04:52




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 Re: Re: JD Hydraulic outlets leaking in reply to thurlow, 05-11-2004 17:37:21  
The hose ends are brand new and there is no rust. It is definetly leaking from the tractor.



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paul

05-11-2004 18:25:45




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 Re: Re: Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 18:04:52  
But a bad hose end could rough up the new o-ring in one application, is the issue.... ;)

For my Ford tractors, I need the Ford orings - the cheap ones from the supply store do not cut it for this application, not the right material. I do not know if this relates to a JD, but it is my experience.

--->Paul



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JMS/MN

05-11-2004 17:29:08




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 Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 16:39:49  
You need to determine where the oil is leaking from. You say it leaks from the bottom- do you mean the bottom of the vertical shaft, or bottom of the rear of the coupler? You mention 'turn them on'- do you mean turning the lever that moves that vertical shaft to lock the coupler in place? You could have a bad o-ring or two on that shaft. You can knock off the top cap, and replace those rings plus the cap. The rebuild kit, the price you mention, is not just o-rings. It includes a new 'carriage', I think it is called, maybe 'basket'- anyway- it is the metal guts of the coupler. Likely not worn out. O-rings should suffice to fix most leaks. Also, if the oil is coming from the rear of the coupler, are both the o-ring and the white plastic ring in good shape? That is the usual cause of leakage- especially if the hose disconnected under pressure. Often, one or the other part flies out upon disconnect. Big advantage to have multiple couplers on a tractor, (I have triple remotes on three field tractors, even though only one machine needs three, while several need two) or carry a few rings in the tool box, along with a pick and WD40. Easy to replace in the field.

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Dieselrider

05-11-2004 18:08:49




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 Re: Re: JD Hydraulic outlets leaking in reply to JMS/MN, 05-11-2004 17:29:08  
It is leaking at the bottom of the vertical shaft and could be that o-ring but, it was replaced when the other ones were. I guess I have to tear it out again and replace them and try again.



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JMS/MN

05-11-2004 21:57:51




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 Re: Re: Re: JD Hydraulic outlets leaking in reply to Dieselrider, 05-11-2004 18:08:49  
I've never used anything but JD parts on the couplers, so I don't know how other supplier parts work. Actually never noticed that they existed! What thurlow said about rusty couplers is valid, as well as damage to the coupler with multiple disconnects under pressure. Usually chips out a piece of the hose end coupler when uncoupling- but you've established the leak is from the vertical shaft, so I would go back to JD rings and go from there. With at least 5 JD's with multiple couplers over 30+ years, I've always used JD parts and had 1-2 remotes rebuilt- one basket and 1-2 vertical shafts- never been a serious problem. I would stay with original parts before going to an off-brand. Now with the ISO standard, that is the only alternative I would go with. My newest JD is a 1983- so hydraulic couplers have never been a problem that I couldn't fix with the right JD parts.

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