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  1. #1
    Platinum Member
    Join Date
    Dec 2015
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    865
    Location
    Indiana
    Tractor
    New Holland Boomer 24

    Default Slip Clutch Adjustment help!

    So bought a tiller. It has a slip clutch. I loosened all the springs. It was to the point that just moving through virgin ground the tines would stop every so often. I assume that was the slip clutch kicking in? So I tightened the springs about a full turn. Now the tiller is lugging the engine every so often.

    So I assume that means I need to loosen the springs a bit? It seems they were too loose and now too tight? Half a turn maybe?

    Any advice apprciated. This is my first attachment with a slip clutch.

  2. #2
    Silver Member
    Join Date
    Nov 2016
    Posts
    125
    Location
    Debary, FL
    Tractor
    Kubota L2501

    Default Re: Slip Clutch Adjustment help!

    Slip clutches can be tricky........
    Lugging (working) the engine is normal depending on what you are tilling. What you dont want is for the engine to stall if the tiller locks up on a rock or stump. If it does stall, the clutch is too tight and not protecting the tractor.

    So you want to slip clutch tight enough to do the work, but not so tight that it stalls the tractor when the tiller locks up.

    If the slip clutch is too loose then it will wear out rapidly and you need to replace the friction discs.

    Also, 1/4 to half turn makes a difference.

    Sounds like yours might be correct the way it is now.

  3. #3
    Veteran Member
    Join Date
    Dec 2013
    Posts
    1,907
    Location
    Southern Alberta, Canada
    Tractor
    4410 and F-935 John Deere, MF 245

    Default Re: Slip Clutch Adjustment help!

    I have never adjusted my tiller slip clutch. I like it the way it's set right now. It'll stall the engine but most times I'm quick enough to shut the pto off before the engine stalls.

    I don't reset it every spring as I store my tiller inside and it doesn't get rusty.

  4. #4
    Veteran Member
    Join Date
    Jan 2010
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    2,436
    Location
    Piedmont, NC
    Tractor
    Kubota L4610 & BX2230, Farmall Super M, Super A

    Default Re: Slip Clutch Adjustment help!

    I always used 1/4 turn adjustments on my tiller slip clutch. Does the tiller also stop spinning when the engine lugs down or does it keep going? If it is continiuing to spin, yes you need to loosen the clutch a bit. It would be normal for the engine to still be under load when the clutch activates since it does not fully release like the clutch in a vehicle.

  5. #5
    Bronze Member
    Join Date
    Apr 2017
    Posts
    87
    Location
    Shelby, KY
    Tractor
    KIOTI CK4010 HST

    Default Re: Slip Clutch Adjustment help!

    It takes some time to get one dialed in, I started a little loose then made adjustments to tighten until I felt it shouldn't be slipping, just make sure once you slip the clutch that you allow it to cool off before making the adjustments. After a hour of so mine was dialed in perfect for my hard clay.

  6. #6
    Platinum Member
    Join Date
    Dec 2015
    Posts
    865
    Location
    Indiana
    Tractor
    New Holland Boomer 24

    Default Re: Slip Clutch Adjustment help!

    Quote Originally Posted by Grandad4 View Post
    I always used 1/4 turn adjustments on my tiller slip clutch. Does the tiller also stop spinning when the engine lugs down or does it keep going? If it is continiuing to spin, yes you need to loosen the clutch a bit. It would be normal for the engine to still be under load when the clutch activates since it does not fully release like the clutch in a vehicle.
    The tiller keeps spinning. So I will loosen a 1/4 turn and see what happens. Thanks.

  7. #7
    Platinum Member
    Join Date
    Dec 2015
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    865
    Location
    Indiana
    Tractor
    New Holland Boomer 24

    Default Re: Slip Clutch Adjustment help!

    Quote Originally Posted by Tigershark View Post
    It takes some time to get one dialed in, I started a little loose then made adjustments to tighten until I felt it shouldn't be slipping, just make sure once you slip the clutch that you allow it to cool off before making the adjustments. After a hour of so mine was dialed in perfect for my hard clay.
    Yeah I spent about an hour with it and was just not quite dialed in apparently. I have to be close!

  8. #8
    Silver Member Oldtink's Avatar
    Join Date
    Mar 2011
    Posts
    204
    Location
    NW.PA
    Tractor
    JD 3520

    Default Re: Slip Clutch Adjustment help!

    at least you're making an effort to adjust it. If you know the mfg. of the slip clutch, they may have spring lengths listed on their web site in relation to applied torque.

  9. #9
    Platinum Member
    Join Date
    Dec 2015
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    865
    Location
    Indiana
    Tractor
    New Holland Boomer 24

    Default Re: Slip Clutch Adjustment help!

    Quote Originally Posted by Oldtink View Post
    at least you're making an effort to adjust it. If you know the mfg. of the slip clutch, they may have spring lengths listed on their web site in relation to applied torque.
    Yeah it is my first (and so far only) implement with a slip clutch. The manual that came with the shaft was ever so helpful. The full instruction was "Properly adjust torque limit clutch". Gee thanks. I can see why for the tiller it is a better choice than a shear pin would be. For my bush hog I certainly prefer the shear pin.

    The nuts that need turned are 9/16 so I guess I need to toss a 9/16 wrench in the tool box and keep tinkering as I go.

  10. #10
    Platinum Member
    Join Date
    Nov 2007
    Posts
    670
    Location
    PA
    Tractor
    Kubota L3130 HST 4x4

    Default Re: Slip Clutch Adjustment help!

    If not already mentioned... For visual proof the clutch is slipping make a line across the clutch and steel plates.
    Kubota L3130 HST 4x4, FEL LA723 w/QA and BH90 Backhoe
    Kubota L4740-3 Cab, HST, FEL w/Heavy duty bucket w/cutting edge
    Snow Blower: L2185 72" front mount w/hyd rotation and electric chute, 7' back blade, carry all, 48" Pallet Forks w/QA, Sun Shade, Turf tires & Rubber Chains for the winter, Extra forward and rear lighting. BearCat 73454 Wood Chipper. LandPride RCR2672 Rotary Cutter. Ballast Box Approximately 390 hours on L3130

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