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  1. #1
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    May 2005
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    New England
    Tractor
    Deere 2210

    Default PTO driveline slip clutch adjustment

    Hi All:

    I orginally posted this under my "48" King Kutter Tiller" thread, but realized that it should have its own heading since the new question relates to the adjustment of slip cluthces in general. I am sure I'm not the first to present this question, and even kinda vaguely remember a discussion on this a few years ago, but I could not locate the thread (if one actually existed).

    Picked up a KK 48" today (actually, yesterday now). Still have not taken it to the soil because I am busy sizing the PTO shaft, etc.

    Question re slip clutch:

    As it should, the PTO shaft includes a slip clutch with the dealer said was "factory set" so as to stop damage to the tiller. However, I'm obviously concerned about the tractor end as well. Anybody have a good method of making sure you slip clutch is properly set. Is it juts a question of loosening the spring bolts to the point that there is noted slippage and then tightening in small increments until you can get the job done with little or no slippage at the slip cluthc, or is there some more methodical approach to this such as torque readings on a torque wrench, etc.? I want to start off knowing that the clutch plates are not frozen and that they have to ability to slip, yes? Please advise on this.

    Thank you for any input you may have,

    JDLou

  2. #2
    Platinum Member xlr82v2's Avatar
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    Southwestern Illinois
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    2007 Mahindra 3525, 1952 Ford 8N

    Default Re: PTO driveline slip clutch adjustment

    JD Lou,

    The approach you describe above should work well. I've got (or had) a chart that showed how much horsepower a slip clutch would transfer based on how tight the bolts were tightened against the springs... I've got the computer searching for it right now. If I can find it, I'll post it.

    Even better, here's an old thread about just this very subject... which has links to the chart I was talking about.

    http://www.tractorbynet.com/forums/a...ng-kutter.html
    Last edited by xlr82v2; 05-26-2009 at 02:01 PM. Reason: Found more info...
    _____________________

    Brian

    2007 Mahindra 3525
    1952 Ford 8N

  3. #3
    Member
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    May 2005
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    New England
    Tractor
    Deere 2210

    Default Re: PTO driveline slip clutch adjustment

    xrl82v2:

    Thank you for yoru post, I'll check out the thread.

    Best,

    JDLou
    JD 2210 (Year 2003); 210 Loader; 5-ft farm blade; 6-ft Rock Rake; 48" King Kutter Tiller; 62" MMM; forks for bucket; 1161 hrs as of July 20 2011

  4. #4
    Platinum Member
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    Jan 2009
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    965

    Default Re: PTO driveline slip clutch adjustment

    Yeah,what you described is the only way I know to do it. And will tell you this,those bolts don't gotta be as tight as you think not to slip.

  5. #5
    Elite Member
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    Northwest, WA

    Default Re: PTO driveline slip clutch adjustment

    Quote Originally Posted by JDLou View Post
    Is it juts a question of loosening the spring bolts to the point that there is noted slippage and then tightening in small increments until you can get the job done with little or no slippage at the slip cluthc,
    Exactly, but lean to the side of 'no slippage'. The clutch is there to 'break' the real, real heavy loads.

    Using a white paint pen to mark and a black felt pen to erase makes it easy to tell when slippage occurs.
    ::Sent from a standard desktop keyboard::

    My Photobucket

  6. #6
    Elite Member Rob-D's Avatar
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    Catskills
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    John Deere 3320

    Default Re: PTO driveline slip clutch adjustment

    I'm wondering if I can adjust the clutch on my Woods HC-60 Rotary Cutter the same way?

    Anyone do a Woods?
    Rob
    Rob

  7. #7
    Platinum Member xlr82v2's Avatar
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    2007 Mahindra 3525, 1952 Ford 8N

    Default Re: PTO driveline slip clutch adjustment

    Quote Originally Posted by Rob-D View Post
    I'm wondering if I can adjust the clutch on my Woods HC-60 Rotary Cutter the same way?

    Anyone do a Woods?
    Rob
    I can't think of any reason why it wouldn't work.
    _____________________

    Brian

    2007 Mahindra 3525
    1952 Ford 8N

  8. #8
    Platinum Member
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    Nov 2005
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    Guildhall, VT
    Tractor
    JD 2305/JD 4720 cab

    Default Re: PTO driveline slip clutch adjustment

    Hi:

    Comments and questions:

    Comment: You can usually tell if the clutch is slipping on a non-cab tractor by that distinctive burning smell like brakes or electrical wiring.

    Question: Does anyone sell a 3/4" (or 1/4") socket to spline adapter? I'd love to be able to block the implement (Generally easy) and use a torque wrench to see when the clutch slips.

    If I wanted it to slip at 20hp it would be approximately 194 ft/lbs to slip it (based on 540 RPM - 20/.1028 (Approx). Seems like this would be a reliable/easy way to adjust it if you knew the torque you wanted it to slip at.
    "I'd rather be on my Tractor"

  9. #9
    Elite Member Rob-D's Avatar
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    John Deere 3320

    Default Re: PTO driveline slip clutch adjustment

    Quote Originally Posted by orlo View Post
    Hi:

    Comments and questions:

    Comment: You can usually tell if the clutch is slipping on a non-cab tractor by that distinctive burning smell like brakes or electrical wiring.

    Question: Does anyone sell a 3/4" (or 1/4") socket to spline adapter? I'd love to be able to block the implement (Generally easy) and use a torque wrench to see when the clutch slips.

    If I wanted it to slip at 20hp it would be approximately 194 ft/lbs to slip it (based on 540 RPM - 20/.1028 (Approx). Seems like this would be a reliable/easy way to adjust it if you knew the torque you wanted it to slip at.
    That's an interesting idea!
    Rob

  10. #10
    Platinum Member xlr82v2's Avatar
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    2007 Mahindra 3525, 1952 Ford 8N

    Default Re: PTO driveline slip clutch adjustment



    Leave it to the guys on TBN to take a relatively simple procedure, and turn it into an engineering problem !

    'Taint rocket science, ya knows!!

    Just get the clutch were it won't slip under normal conditions, but it will when it gets a "shock load" such as when you hit a hard object hidden in the soil. That's all you're looking to do. Setting the clutch any other way is still a WAG... with the torque wrench, that just makes it a SWAG.

    If you read the thread I posted the link to earlier, I explain my logic in not setting it to a torque value randomly chosen from a chart... but rather setting it to match your field conditions. I think that's the best way to attack this problem.

    Have fun with it!
    _____________________

    Brian

    2007 Mahindra 3525
    1952 Ford 8N

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