8050/JD chopper
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=13012
Printed Date: 01 Feb 2025 at 1:45am
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Topic: 8050/JD chopper
Posted By: Steele
Subject: 8050/JD chopper
Date Posted: 26 May 2010 at 11:12pm
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I purchases a 3970 JD chopper of which I am going to chop hay with soon. I am a little confused on the open center vrs closed center hydralics. The hydralic lever has to be in the lift possition at all times to run all of the chopper controls. The person i bought it from ran it with a 4850 JD and a 4440 JD. I have it hooked up to my 8050 at this time. Do I have to change anything on this chopper to run it. Also, how do I keep the hydralic lever activated without going to float. Do I need a spacer and a tie strap to keep the lever forward? At idle the tractor labors a little when the lever is activated. I don't want to screw something up. What kind of system does the 8050 have and what kind of system does the JD tractors have? Any help appreciated.
thank you
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Replies:
Posted By: Dave King
Date Posted: 26 May 2010 at 11:18pm
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I think they both have closed center, at any rate they're the same, so no change needed. I usually use a tarp strap on the lever to hold it back. I don't know how much hydraulic flow you need, but at a high flow, the tractor will grunt at idle. The 8050 should be able to do more with the hyd than the 4440 easily.
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Posted By: DrAllis
Date Posted: 27 May 2010 at 5:22am
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Do NOT use a tarp strapor wire to hold the lever engaged. Remove the rubber dust plug on the rear of the valve you want to use and adjust/tighten the "kick out" screw so it won't release on its own. This is in your operators manual. Failure to do this promotes excessive heating of the hydraulic oil.
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Posted By: Russ-neia
Date Posted: 27 May 2010 at 9:36am
We ran a 3960 with our 7040. Always had trouble with it heating the oil, but we used a tarp strap on the lever. Got a NH 900 and had a better chopper without the hydraulic headaches. Now running a FP230 NH, still with the 7040...
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Posted By: Kcgrain
Date Posted: 27 May 2010 at 7:43pm
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Have been thinking about your problem all day, believe it or not, and it seems to me that if I remember right when I sold machinery if you had a non JD tractor hooked to the wall of steel chopper you had to buy a plug or some insert that went into the hyd system of the chopper, it wasnt very expensive. They do both have a closed center system,but AC was load a pressure sensitive,and I believe that plug stopped it from demanding huge amount of oil that just by passed and went back to tank, ask you local JD dealer about it, but I am pretty sure its still available, or buy a New Holland !!!!!!!!!!!!!!! sorry had to ad that.
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Posted By: klinemar
Date Posted: 27 May 2010 at 9:18pm
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I chopped with a 8050 and 3970 and Dr.Allis is right adjust the screw at the back of the valve you are going to use ,also the screw on the choppers hydraulic manifold is to switch from closed center to open center this should be explained in the operators manual for the 3970 chopper.I had a neighbor who bought a 3970 and pulled it with his Case IH Magnum and did not get his hydraulics right and burned up the hydraulic pump.I never had any trouble 3970 is a good chopper.
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Posted By: klinemar
Date Posted: 27 May 2010 at 9:22pm
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You might have to adjust the flow control under the seat .I just remembered my 8050 when we first put the chopper on would raise the head too fast and it would bang against the stop,so you should have the flow control set on turtle instead of rabbit.
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Posted By: powertech84
Date Posted: 27 May 2010 at 10:02pm
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Deffinetly dont mess with the valve on the chopper. You want to leave it closed center.
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