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4020 Hey OakTreethree point lift control revisted from below

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Greg H.

12-19-2000 10:38:29




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I have always kept my selection lever on my setting on the LD position. I was under the understanding that this was where it was supposed to control depth level, yet be responsive to Load. Is what you explained below that the "D" or depth control is what is used to stop the three point at a pre-determined level? The LD is allowing my three point to free fall as soon as I let it go back. Is that normal? Straighten me out, because I sure am confused. Thanks, Greg H.

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Oaktree

12-19-2000 16:21:51




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 Re: 4020 Hey OakTreethree point lift control revisted from below in reply to Greg H., 12-19-2000 10:38:29  
I posted earlier but don't see it am reposting. First I'd like to say that I always run my 3020 in the Depth position. I don't use it to pull mounted field equipment. However I have thousands on hours experience with the draft system in a 4230.I would move the draft control lever out of depth position to give more uniform depth control when running a mounted field cultivator. The draft system would lower the 3 pt on top of hills and raise it in the bottom ground. The ground I farm is hard on top of hills and soft in the bottoms. I also always returned the lever to the depth position when transporting as It would raise the fieldcultivator higher.Mike Aylward is pretty sharp there is probally an ajustment in the linkage that needs to be done as the two levers interact with on another.

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Oaktree

12-19-2000 16:04:54




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 Re: 4020 Hey OakTreethree point lift control revisted from below in reply to Greg H., 12-19-2000 10:38:29  
I'll have to admit that I have'nt use the load(L)
or the L/D load and depth. on my 3020.However I've put thousands of hours on 4230's with mounted field cultivators. The 4230 draft control had around 10 different settings but they were really just notches on the continously variable control. The way I used them was to allow the field cultivator or plow to adjust for going up or down a hill.when going over a hill the the 3 pt would put the implement in a little more. When going thru bottom the 3 pt would raise the implement a little.The ground I farm (Central Illinois) tends to be hard on the hills and soft in the bottoms. So a little more pressure on the hills helped me work at a more even depth.
It seemed I almost never went more than half way from the depth position to the load position. I also remember always putting the lever in the depth position when transporting as it would raise the implement higher.

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buckeye al

12-19-2000 15:07:43




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 Re: 4020 Hey OakTreethree point lift control revisted from below in reply to Greg H., 12-19-2000 10:38:29  
Our 4020 did much the same things when we got it. No depth control no matter where the L&D lever was set. The L&D lever didn't want to move through it's various positions properly at all. If it was in one position (I forget which), then the control lever (in the dash) wouldn't travel properly. The levers seemed to fight each other. This is a very very early 4020 & not a console model but I found the problem was inside the valve control assembly. The little differential gears inside that sense changes in draft and control the hydraulic valve were 2 teeth out of time. The draft sensitivity adjustments Oaktree properly suggests were not effective until these gears were timed properly. Works fine now. Cost us a gasket. Do like Oaktree said & carefully read the book.

Hope this all helps. Let us know.

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Greg H.

12-20-2000 10:09:22




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 Re: Re: 4020 Hey OakTreethree point lift control revisted from below in reply to buckeye al, 12-19-2000 15:07:43  
Thanks fellaa,
I'll curl up some evening this week with my shop manual, and try to learn something. It may be a while before I post back with progress on this one, since it's 10 deg F outside, and I don't have a heated shop. thanks again, Greg H.



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buckeye al

12-19-2000 15:09:47




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 Re: Re: 4020 Hey OakTreethree point lift control revisted from below in reply to buckeye al, 12-19-2000 15:07:43  
Sorry! Mike suggested the adjustment! Didn't mean to steal anybody's thunder.

I apologize.



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Mike Aylward

12-19-2000 11:28:55




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 Re: 4020 Hey OakTreethree point lift control revisted from below in reply to Greg H., 12-19-2000 10:38:29  
Greg, your 3-point internal linkage probably needs adjusting. It's a little lengthy to go into detail here, but look at a Technical Manual for your 4020 and it explains it in there. There are two different methods to do this, depending on the serial number. This is a minor adjustment procedure that can be done in 10 or 15 minutes, perhaps less, and should bring your 4020 back into line. Hope this helps. Mike

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