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  1. #1
    Platinum Member
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    2008 John Deere 5303 MFWD

    Default Disc Harrow Adjustment

    I have noticed when cutting under heavy grass I am leaving a narrow strip in the center. I don't notice it when cutting in soil with little to no grass, but I am certain it is still uncut just covered with loose, thrown soil.

    Attached are a couple pictures of the front and rear gangs. If I recall correctly, I can't move the front any closer together without making some modifications.

    Is this an adjustment problem or is the only solution to move the front gangs closer together?

    -forumrunner_20120617_170851-png



    -forumrunner_20120617_171012-png

  2. #2
    Veteran Member sam5570's Avatar
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    south west virginia
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    new holland tn70

    Default Re: Disc Harrow Adjustment

    thks for the pics you will always get a strip in the middle and with your disc set to cut like they are the strip will be wider you can pull the pin in the center push the disc arms backward witch will make them straight then line pin up it will take longer and they won't cut as good but the center strip you are trying to get rid of will be smaller what i do is i over lap my next pass to put my 2 disc closest to end to get the strip i mised hope this helps. if you want to leave them as is just overlap to disc in the strip.

  3. #3
    Elite Member gwdixon's Avatar
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    Default Re: Disc Harrow Adjustment

    Hard to believe but that strip bothered me so much that I made a sweep that bolts to the center member and digs a small trench where the strip used to run. It turns the soil enough to "disc" that portion. (Photo if requested.)

    The added problem is that the rear gang doesn't cut the strip either and, in fact, about a two foot center section only has one gang going over it. sam5570 has the solution of centering one of the front gangs over the center strip on the next pass to give the soil a good work-over. It takes twice as long to disc a field because of the overlap but it certainly turns out cleanly.
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  4. #4
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    Default

    I have done the overlapping method by cutting the entire field twice by moving over on the first pass and then just using my typical following of the outside furrow created.

    First post made from mobile device and wasn't sure pictures posted. Sounds like they did.

    I can overcome the problem with the multiple passes, but was curious if anyone had discovered an adjustment or other solution to keep from leaving this strip on the initial pass.

  5. #5
    Platinum Member npalen's Avatar
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    Beloit, KS
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    Kubota B9200 HSTD and Allis 720

    Default Re: Disc Harrow Adjustment

    Quote Originally Posted by gwdixon View Post
    Hard to believe but that strip bothered me so much that I made a sweep that bolts to the center member and digs a small trench where the strip used to run. It turns the soil enough to "disc" that portion. (Photo if requested.)

    The added problem is that the rear gang doesn't cut the strip either and, in fact, about a two foot center section only has one gang going over it. sam5570 has the solution of centering one of the front gangs over the center strip on the next pass to give the soil a good work-over. It takes twice as long to disc a field because of the overlap but it certainly turns out cleanly.
    The "sweep" that you added is known as a "middle buster" in the ag industry. Any tandem disc has this problem unless it is a "tandem offset" where one of the two front gangs runs slightly behind the other and overlapping just enough to cut out the middle ridge. The rear gangs will run side by side (not offset) throwing the soil back to the middle.

  6. #6
    Gold Member the6shooter's Avatar
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    Dec 2006
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    oklahoma
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    MF 1643

    Default Re: Disc Harrow Adjustment

    I beleive that if you loosen your U-bolts up and move the rear gang closer togather will solve most of your problem.
    kind of like this: )))))) (((((( to ))))))((((((, you will lose width but close the gap in the gangs.
    david

  7. #7
    Super Member
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    Deere 110tlb, 4520, x749, L130

    Default Re: Disc Harrow Adjustment

    Quote Originally Posted by deere5105 View Post
    I have noticed when cutting under heavy grass I am leaving a narrow strip in the center. I don't notice it when cutting in soil with little to no grass, but I am certain it is still uncut just covered with loose, thrown soil.

    Attached are a couple pictures of the front and rear gangs. If I recall correctly, I can't move the front any closer together without making some modifications.

    Is this an adjustment problem or is the only solution to move the front gangs closer together?

    -forumrunner_20120617_170851-png



    -forumrunner_20120617_171012-png

    I agree with the others add a middle buster ahead of the rear gangs should solve that problem. Have to say that disk rebuild looks great, glad to see you getting some use out of it. This is a very common option on a tandem disk if you check this out.

  8. #8
    Platinum Member
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    2008 John Deere 5303 MFWD

    Default

    Quote Originally Posted by jenkinsph

    I agree with the others add a middle buster ahead of the rear gangs should solve that problem. Have to say that disk rebuild looks great, glad to see you getting some use out of it. This is a very common option on a tandem disk if you check this out.
    Am pleased with the outcome of the project and the performance too. Thanks again for the input and suggestions.

    After giving it more thought, not sure the design allows for clearing that strip. Was curious how others dealt with the issue or if it was just ignored.

  9. #9
    Platinum Member
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    2008 John Deere 5303 MFWD

    Default

    Quote Originally Posted by gwdixon
    Hard to believe but that strip bothered me so much that I made a sweep that bolts to the center member and digs a small trench where the strip used to run. It turns the soil enough to "disc" that portion. (Photo if requested.)

    The added problem is that the rear gang doesn't cut the strip either and, in fact, about a two foot center section only has one gang going over it. sam5570 has the solution of centering one of the front gangs over the center strip on the next pass to give the soil a good work-over. It takes twice as long to disc a field because of the overlap but it certainly turns out cleanly.
    Would be interested in seeing picture of what you installed if not too much trouble. May be making a mountain out of a mole hill. If I know will be making two passes, sliding over a little may be best solution.

  10. #10
    Super Member
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    Deere 110tlb, 4520, x749, L130

    Default Re: Disc Harrow Adjustment

    Here is a link to get an idea, look at page 3 lower left corner, this is a Frontier disk made by Monroe Tufline.


    http://www.deere.com/en_US/docs/non_...s_dh15_lit.pdf

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