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  1. #1
    Silver Member
    Join Date
    May 2001
    Posts
    163
    Location
    Iowa
    Tractor
    JD X485 AWS,B2410,RTV900

    Default Adjusting a Tiller driveline slip clutch

    How difficult is it to adjust a pto driveline slip clutch for a tiller? Can a novice non-mechanic handle this adjustment procedure? How often would this adjustment need to be done?

    Thanks

  2. #2
    JJT
    JJT is offline
    Veteran Member
    Join Date
    Oct 2001
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    1,162
    Location
    Upstate NY, USA
    Tractor
    Kubota L3710 HST and a Kubota ZD21 60Pro

    Default Re: Adjusting a Tiller driveline slip clutch

    I adjust mine annually in the spring. I back off all the nuts a couple of turns, drop the tiller into the dirt to make sure the clutch slips, (free up the winter corrosion). Then tighten things up a turn. If the clutch slips breaking new ground I'll tighten the nuts another half turn. A little trial and error, but it works for me. Too tight and the clutch will not slip and you'll break something, too loose and the clutch will be toast in no time.

    The first year I had the tiller I tried to set the tension using a torgue wrench, but you need 1 that will go down to inch pounds. I do it be feel on both the brush hog and the tiller.

  3. #3
    Bronze Member
    Join Date
    Feb 2004
    Posts
    57
    Location
    braselton,ga
    Tractor
    mahindra 4500

    Default Re: Adjusting a Tiller driveline slip clutch

    the adjustment on mine is by the length of the springs,according to the hp of the tractor..i have a 42hp mahindra and the spring length is supposed to be 26.25mm,the more hp you have the shorter the springs should be..

  4. #4
    Gold Member
    Join Date
    Nov 2004
    Posts
    322
    Location
    Nevada
    Tractor
    John Deere 970

    Default Re: Adjusting a Tiller driveline slip clutch

    I guess I adjust my Howard the same as the others. Back off the nuts until the springs are loose, dig in and make it slip, tighten the nuts 4 flats ( 3/4 turn ) and try again. If it doesn't slip after the 4 flats on the nut tightening, I run it. I haven't hit anything that has caused the clutch to slip yet but I'm sure it will work when the time comes.
    Chris

  5. #5
    Super Star Member Egon's Avatar
    Join Date
    Aug 2001
    Posts
    17,313
    Location
    Nova Scotia, Canada

    Default Re: Adjusting a Tiller driveline slip clutch

    Do a search using the words

    Re: Slip clutch adjustment

    Egon

  6. #6
    Elite Member
    Join Date
    Mar 2002
    Posts
    3,310

    Default Re: Adjusting a Tiller driveline slip clutch

    "the adjustment on mine is by the length of the springs,according to the hp of the tractor..i have a 42hp mahindra and the spring length is supposed to be 26.25mm,the more hp you have the shorter the springs should be."

    That doesn't sound right to me. It seems to me the clutch should slip, (and save your equipment), or not, (and damage something), regardless of how much horsepower you have, and the spring tension should be determined by the clutch manufacturer. That would be like using a bigger, stronger shear pin, the more horse power you have.

  7. #7
    Bronze Member
    Join Date
    Feb 2004
    Posts
    57
    Location
    braselton,ga
    Tractor
    mahindra 4500

    Default Re: Adjusting a Tiller driveline slip clutch

    normde2001,those specs came from the owners manual for my tiller,and from experiance they will slip when they have to,say when you hit a rock,stump ect.i have a 72" WAC tiller

  8. #8
    Elite Member
    Join Date
    Jul 2003
    Posts
    3,373
    Location
    Goffs Corner, KY
    Tractor
    IH 2444

    Default Re: Adjusting a Tiller driveline slip clutch

    Norm,
    I would assume that the reason for the tighter clutch adjustments for a higher HP tractor would be to take into account the heavier duty PTO components in a higher HP tractor vs lighter duty ones in a lower HP tractor.

    Ben

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