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  1. #1
    Silver Member thetooth's Avatar
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    May 2010
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    North East
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    kubota b7500

    Default New to Tractor 4wd Question ?

    I researched this and i think i found the answer but just want to confirm .

    First tractor ( new to me B7500 hst ) first vehicle with 4wd .

    Messing around in the back yard getting use to the FEL . well i was back blading with the bucket , in 4wd and i had the front tires just off the ground and 1 ( right wheel from operators seat ) wheel was spinning faster than the other .

    This is normal right ?

    Thanks for your help
    B7500 FEL / 54 " Mower
    60" woods rear blade
    62" bushog RTS tiller
    Countryline Sub Soiler
    Simplicity Broadmoor
    Cub Cadet 1812

  2. #2
    Elite Member Ductape's Avatar
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    Feb 2006
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    4,853
    Location
    Central New Hampshire
    Tractor
    Kubota B3030HSDC

    Default Re: New to Tractor 4wd Question ?

    The front differential is 'open', so the wheel with the least traction will spin. With your tractor in four wheel drive, it's really only two wheel drive..... one rear and one front. In four wheel drive with the differential locked, you have three wheel drive ........ both rears and one front.

  3. #3
    Silver Member thetooth's Avatar
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    May 2010
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    North East
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    kubota b7500

    Default Re: New to Tractor 4wd Question ?

    Thanks DuctTape . I read that in another thread but i needed the reassurance !
    B7500 FEL / 54 " Mower
    60" woods rear blade
    62" bushog RTS tiller
    Countryline Sub Soiler
    Simplicity Broadmoor
    Cub Cadet 1812

  4. #4
    Epic Contributor Bird's Avatar
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    37,441
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    Texas

    Default Re: New to Tractor 4wd Question ?

    Quote Originally Posted by thetooth View Post
    Thanks DuctTape . I read that in another thread but i needed the reassurance !
    In that case, I concur with DuctTape. And that's a nice little tractor you have. I'm sure you'll enjoy it.
    Bird

  5. #5
    Elite Member
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    Nov 2005
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    2,929

    Default Re: New to Tractor 4wd Question ?

    Quote Originally Posted by Ductape View Post
    The front differential is 'open', so the wheel with the least traction will spin. With your tractor in four wheel drive, it's really only two wheel drive..... one rear and one front. In four wheel drive with the differential locked, you have three wheel drive ........ both rears and one front.
    Yeah, but not the question asked.

    BOTH front wheels were off the ground - yes, it is normal due to the asymmetry of the front diff.
    Could be right, could be left, depends how it is assembled, but I would expect all examples of the same make and model to have the same side slightly faster.

  6. #6
    Silver Member thetooth's Avatar
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    May 2010
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    212
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    North East
    Tractor
    kubota b7500

    Default Re: New to Tractor 4wd Question ?

    Thanks Reg and Bird . I am new to this so i appreciate your input .

    thanks
    B7500 FEL / 54 " Mower
    60" woods rear blade
    62" bushog RTS tiller
    Countryline Sub Soiler
    Simplicity Broadmoor
    Cub Cadet 1812

  7. #7
    Super Member
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    Apr 2000
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    6,209
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    central New York
    Tractor
    all makes and models

    Default Re: New to Tractor 4wd Question ?

    I think that I've seen a few bent cylinders on that dance!!!!!!

  8. #8
    Super Member
    Join Date
    Feb 2006
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    8,296
    Location
    VA
    Tractor
    JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500

    Default Re: New to Tractor 4wd Question ?

    Quote Originally Posted by Ductape View Post
    The front differential is 'open', so the wheel with the least traction will spin. With your tractor in four wheel drive, it's really only two wheel drive..... one rear and one front. In four wheel drive with the differential locked, you have three wheel drive ........ both rears and one front.
    Actually, both wheels on both ends drive thru an open differential. Its just that, on each end, you only get twice the driving force of the wheel with the lesser traction.
    larry
    This side of 40
    JD2010, Kubota L3450/FEL w SK QC, L2550 w FEL
    Mahindra 7520 [Pinky] /FEL w Skid Steer QC/w Tilt Tatch & BH, BX1500 [Mighty Mouse]
    IH37 Baler, CCM165 Drum Mower, JD Rake
    JD 127 bushog, Flail, SK Tilt Tatch , KK tiller, Rhino rear blade, Post driver, post auger, chipper, pallet fork, Grapple/Loader Buddy, Homemade Splitter/DC Welder

  9. #9
    Silver Member thetooth's Avatar
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    May 2010
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    North East
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    kubota b7500

    Default Re: New to Tractor 4wd Question ?

    Quote Originally Posted by art View Post
    I think that I've seen a few bent cylinders on that dance!!!!!!
    Yes it's not something i would often do . I tilled a new garden bed with the troy bilt and raked it clear of any obstructions . I have been using the bed ( before i plant it ) to get use to the FEL digging some dirt , using the bucket it float , moving some compost over , and a little back blading .

    Thanks for the input everyone !
    B7500 FEL / 54 " Mower
    60" woods rear blade
    62" bushog RTS tiller
    Countryline Sub Soiler
    Simplicity Broadmoor
    Cub Cadet 1812

  10. #10
    Super Member RadarTech's Avatar
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    Feb 2008
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    Location
    North Carolina
    Tractor
    2007 Kubota L3400

    Default Re: New to Tractor 4wd Question ?

    Quote Originally Posted by Ductape View Post
    The front differential is 'open', so the wheel with the least traction will spin. With your tractor in four wheel drive, it's really only two wheel drive..... one rear and one front. In four wheel drive with the differential locked, you have three wheel drive ........ both rears and one front.
    thanks!

    I had wondered about that but never checked it..
    Often I have seen 1 of front tires spin and the other not..

    now I feel better!


    thanks,
    J

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