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John Deere Tractors Discussion Forum
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4320 hydraulic outlets

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AS

09-23-2003 06:02:46




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I have a 74 4320. One of the hydraulic outlets is leaking like crazy. Last night I tried to take it apart but could not figure out how its done. I take it there is an O ring in there that must be bad. Anyone know how they come apart?




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Mike w J

09-24-2003 07:23:58




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 Re: 4320 hydraulic outlets in reply to AS, 09-23-2003 06:02:46  
needle nose, dentist pik for oring removel, hammer, punch, for soft plug and as said before .The pik will make it go alot easier



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CMB

09-23-2003 10:43:58




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 Re: 4320 hydraulic outlets in reply to AS, 09-23-2003 06:02:46  
I rebuilt these on my 4010 quite a while ago.You'll probably need everything subject to wear-might as well do it right the first time! As I remember, it wasn't such a bad job & the rebuild kit was very complete, with a pretty good set of instructions. Good luck!



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G-MAN

09-23-2003 10:52:28




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 Re: Re: 4320 hydraulic outlets in reply to CMB, 09-23-2003 10:43:58  
None of them are too terribly difficult to rebuild, but your 4010 couplers are easier than the late 4020 on up boxes, because your coupler is only a coupler, and doesn't include the rest of the SCV in the same housing. The SCV part of the valve on the newer boxes is what makes it kind of a pain to get to the clips and springs on the levers. But, once you've done a dozen or so of them, they're pretty gravy.

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RJ-AZ

09-23-2003 09:01:38




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 Re: 4320 hydraulic outlets in reply to AS, 09-23-2003 06:02:46  
These guys are on the money. An experienced JD tech makes it look so easy. You might price it out at the dealer, make them give you an estimate and hold them to it.



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G-MAN

09-23-2003 07:43:00




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 Re: 4320 hydraulic outlets in reply to AS, 09-23-2003 06:02:46  
First, you'd be best off to get the service manual, or copy pages from one. Next, the couplers themselves are probably worn, and will need replaced as well, or they may continue to leak. Then, don't even worry about trying to save any of the small parts. Get the springs and c-clips new when you get the seals and barrels. It's also not worth the time to try and get the plugs, large balls and springs out of the old barrels for installation in the new ones. Get new ones of those, too. And also replace the small balls that retain the tips, as if they are worn, they won't hold the tips in well, which will allow oil leakage. This is one area where it's much easier and better to spend the money the first time and replace all wear items, than to do the job two or three times. We use a special little home-made tool to hold down the springs, and a spring loaded clip tool to install the c-clips. Make sure the flat spot is up when you install the barrels, where the levers go through them. Reinstall the steel plugs by setting them in the bores and using a punch in the center to expand them. You don't have to beat them to death, just a couple of good taps will seat them well. Like I said, the service manual will lay all of this out in good detail.

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Dan

09-23-2003 06:50:30




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 Re: 4320 hydraulic outlets in reply to AS, 09-23-2003 06:02:46  
I believe those are the same as the 4020 and 3020. Used to rebuild a lot of them when I worked for the Deere dealer. Been a long time but believe there is a soft plug in the top. You have to puncture it and pry off. Then you will see a small snap ring on the pin that locks the fitting in. Remove the snap ring and pull the pin and insides should come out the front. JD used to have rebuild kits with the stuff you need for inside and new soft plug. Hard part is getting the snap ring back on inside the top hole when you put it back together. Think JD may have a tool to do it. I used bent nosed needle nose pliers. You need 3 hands and only have room for 1 finger. Good luck

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Bob

09-23-2003 07:28:41




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 Re: Re: 4320 hydraulic outlets in reply to Dan, 09-23-2003 06:50:30  
And be prepared to catch the small, stiff spring that is under the little snap ring!



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Dan

09-23-2003 12:51:38




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 Re: Re: Re: 4320 hydraulic outlets in reply to Bob, 09-23-2003 07:28:41  
That's why they were such a pain, forgot that spring!!!



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