3 point hitch question-JD 4000 series: John Deere Price  -- John Deere Tractors Discussion Forum and Review 3 point hitch question-JD 4000 series: John Deere Price -- John Deere Tractors Discussion Forum

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 05-25-2002, 19:43 Post: 39036
Jimbopa
2002-05-25 19:43:59
Post: 39036
 3 point hitch question-JD 4000 series

Just a quick question, on my 755 I seem to think that I could raise and lower the rockshaft arms aka three point hitch . I think I had down force pressue because I had an auger once and it seemed to press in.

On my new 4310 I have to push the 3 point arms down manually. No way to hydraulically push and I am concerned that they should. I spoke with the dealer and he said a 4000 and large tractors for that matter do not have downforce on the 3 point arms.

Can anyone comment on this? what about all the various attachemends , tiller ,rack I would assume you should have some down pressure.






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 05-25-2002, 19:58 Post: 39037
DennisCTB

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 3 point hitch question-JD 4000 series

Its the weight, the draging and the rotation of tillers etc. that makes them work via " The Age Old Force of Gravity.

Dennis
CTB






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 05-25-2002, 23:29 Post: 39042
DRankin



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 3 point hitch question-JD 4000 series

On my 4100, and as far as I know, all tractors, use mean old Mr. gravity to exert down force on the 3 pt hitch. However........ my 4100 has a valve under the seat to control the rate of drop. If I open it too far I had better plug my ears or get ready to repair cracked concrete. If it is closed it simply will not drop. Is there something like that on your Deere machine?






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 05-26-2002, 07:11 Post: 39059
TomG

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 3 point hitch question-JD 4000 series

As far as I know very few tractors have down-pressure on the 3ph (Bolens comes to mind as a tractor that does). For that matter, most 3phís arenít held down either. I don't know how the Bolens 3ph works, but I donít think that down-pressure is desirable for a lot of ground engaging work. Pushing down with the 3ph would unload the rear wheels and reduce traction. For that reason, most 3ph's float upward or have draft control that raises the 3ph in high draft conditions.

Some implements themselves have down-pressure. A post-hole auger discussed here awhile back has a down-pressure option. It took us awhile to figure out how the thing would work, since most 3ph's will float upward. It might be interesting to find one or more threads in the archives that discuss how a 3ph works and why. Basically, ground-engaging implements rotate on their lower link pins under load that applies compression force on the top-link. Compression on the top-link helps hold the front wheels down.






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 05-27-2002, 08:15 Post: 39084
Art White



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 3 point hitch question-JD 4000 series

Just my thoughts for what they are worth, neither of the tractors you mentioned have down pressure. I would look at the teeth on the auger and replace them or sharpen them with a hand grinder and try it again. Many people get frustrated with the augers when they don't go into the ground as when they bought them. The biggest thing I see is the points are dull and need to be replaced or sharpened to bring the auger up to it's ability.






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 05-27-2002, 10:30 Post: 39087
DRankin



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 3 point hitch question-JD 4000 series

My experience with sharpening steel is that a bench grinder gets the edge too hot and it becomes brittle and dulls even faster. Best tool is a big old mill file and a little patience.






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 05-27-2002, 11:42 Post: 39088
DavidJ



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 3 point hitch question-JD 4000 series

Most people will generally let cutting equipment (yes, an auger is a cutting tool) get very dull especially those that cut into earth. A sharpening will probably help the auger bore more efficiently. I agree with Mark about the best sharpening tool is a hand file bit, most people are not patient enough to do a good job with a file (me included Smile. In that case I would take Arts advice and use a hand grinder. Use as coarse a wheel as you can find because it removes material fast and helps keep the metal cool. Take your time and make sure to keep the edge from 'bluing'. WIth that said, mose ground engaging equipment does not require downforce. As for you problem with having to push the arms down, I think you have the speed valve set to closed. If you're having to assist them when their unloaded this may be normal, I have to assist mine from time to time when I'm in a hurry, they will lower just not very fast when unloaded.






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