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  1. #1
    New Member
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    May 2012
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    3
    Location
    Ogdensburg, NY
    Tractor
    kubota b7510

    Default Tires spinning

    A question about the wheels on my kubota b7510. I was discing a plowed field with it today and got hung up several times with some deep furrows -- a couple of tires were spinning and two others not moving at all.

    I could deal with it, but what's this about?

    thanks -- tim

  2. #2
    Platinum Member
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    Feb 2002
    Posts
    622
    Location
    Connecticut
    Tractor
    BX2360/ Kubota SVL90-2/ Kobelco 115SR/ Kubota 161-3

    Default Re: Tires spinning

    Even though you tractor is 4wd it isnt really 4wd, you have differentials in the front and rear end and when one tire gets more resistance the one with less resistance has a tendency to spin. There should be a differential lock pedal for the rear end and when stepped on it will lock the rear diff, BUT, you really should to stop spinning wheels before you apply it, you dont necessarily have to but it is easier on the machine.
    If it has anything to do with diesel, dirt, and shiny things, I'm interested....

  3. #3
    Epic Contributor k0ua's Avatar
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    Jun 2009
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    21,950
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    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: Tires spinning

    Here you go.. this old 1937 video explains how a differential works better than anything I have ever seen. Keep in mind you have 2 differentials a rear and a front. but If you can follow this you will understand. The first 2 minutes seem worthless, but there is a purpose stay with it.


    [ame=http://www.youtube.com/watch?v=F9EPf8SJc2Q]Auto Mechanics: Differential: "Around the Corner" 1937 General Motors 9min - YouTube[/ame]


    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  4. #4
    Veteran Member PHILIP8N's Avatar
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    Sep 2009
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    1,314
    Location
    Indianapolis
    Tractor
    Kubota L3940 Kubota GR2120 Ford 8N Ford 6000

    Default Re: Tires spinning

    Quote Originally Posted by Tags View Post
    Even though you tractor is 4wd it isnt really 4wd
    Curious why you would say that? Then what would you call it?
    Kubota L3940HST-1 2009
    84" front blade
    LA724 loader w/HD 72" round back bucket
    turf tires
    Kubota GR2120 2013
    Kubota W5019 PC
    Ford 8N 1950
    Ford 6000 diesel 1961
    Woods RD7200 finish mower, Land Pride RCR1272 rotary cutter, Land Pride RTR1274 tiller, Bearcat CH5540 5" chipper, L8170 ballast box, 6' Woods pulverizer, 6' Dragon box scrapper with hydraulic rippers, 14" 2 bottom plow, post hole auger, 7' Land Pride RB1584 rear blade, 3 point boom pole, 48" 4000# SSQA pallet forks

  5. #5
    Elite Member Bob77064's Avatar
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    Sep 2011
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    3,972
    Location
    KY @ TN line
    Tractor
    2011 LS R3039

    Default Re: Tires spinning

    Quote Originally Posted by k0ua View Post
    Here you go.. this old 1937 video explains how a differential works better than anything I have ever seen. Keep in mind you have 2 differentials a rear and a front. but If you can follow this you will understand. The first 2 minutes seem worthless, but there is a purpose stay with it.


    Auto Mechanics: Differential: "Around the Corner" 1937 General Motors 9min - YouTube


    James K0UA
    James that is a good video, thanks for posting.

  6. #6
    Epic Contributor k0ua's Avatar
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    Kioti DK35se Hydrostat

    Default Re: Tires spinning

    Quote Originally Posted by PHILIP8N View Post
    Curious why you would say that? Then what would you call it?

    It is 4WD as long as the resistive/tractive forces are equal on a per axle basis. In other words, as long as the front tires have have the same load on them they will both turn. Same for the rear's. But if they are unequal on a per axle basis then it is possible to only turn one wheel/tire and the other to be stopped. I have seen many times when only 1 tire per axle is spinning, and many times when all 4 are spinning. If you use your rear differential lock you can guarantee 3 tires spinning .

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  7. #7
    Epic Contributor k0ua's Avatar
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    Kioti DK35se Hydrostat

    Default Re: Tires spinning

    Quote Originally Posted by Bob77064 View Post
    James that is a good video, thanks for posting.
    Yes I was amazed how the narrator and the video start you off slow and through an easy to understand progression takes you deeper and deeper into understanding a fairly complex subject. Who say's Grandpa wasn't a good teacher!

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  8. #8
    Super Member JOHNTHOMAS's Avatar
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    Apr 2008
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    6,579
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    Somerset, Ky
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    B2650 F3080 ZD326 Z122r RTV1140

    Default Re: Tires spinning

    Loved the picture of the car! My first car I bought in 1964 while a Senior in HS was a 1935 Dodge 4 door sedan that looked pretty similiar to this car. Next car several months later was a 1958 Chevy Impala 348 Auto converted to 3sp in the floor. Lots of tickets 1964-65. Even got one for riding boys on the running board.
    Sorry, back to 4wd.
    2016 B2650, 2015 ZD326rp 60" rear Discharge Deck, 2012 F3080 4WD 72" rear discharge deck ,2015 Z122r, 2010/2009 RTV1140CPX , RatchetRake, BB, 50" Tiller, Forks, .. and Horse Drawn disk 13 Toyota Tacoma Double Cab, 15 Subaru Outback. 2012 MINI Cooper S Roadster

  9. #9
    Veteran Member PHILIP8N's Avatar
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    Location
    Indianapolis
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    Kubota L3940 Kubota GR2120 Ford 8N Ford 6000

    Default Re: Tires spinning

    Quote Originally Posted by k0ua View Post
    It is 4WD as long as the resistive/tractive forces are equal on a per axle basis. In other words, as long as the front tires have have the same load on them they will both turn. Same for the rear's. But if they are unequal on a per axle basis then it is possible to only turn one wheel/tire and the other to be stopped. I have seen many times when only 1 tire per axle is spinning, and many times when all 4 are spinning. If you use your rear differential lock you can guarantee 3 tires spinning .

    James K0UA
    Thanks James, I understand the operating dynamics of 4wd, open, limited-slip, and locking differentials. I just wanted Tags to explain how a tractor is called 4wd even though it really is not, and what he would call that. Philip.
    Kubota L3940HST-1 2009
    84" front blade
    LA724 loader w/HD 72" round back bucket
    turf tires
    Kubota GR2120 2013
    Kubota W5019 PC
    Ford 8N 1950
    Ford 6000 diesel 1961
    Woods RD7200 finish mower, Land Pride RCR1272 rotary cutter, Land Pride RTR1274 tiller, Bearcat CH5540 5" chipper, L8170 ballast box, 6' Woods pulverizer, 6' Dragon box scrapper with hydraulic rippers, 14" 2 bottom plow, post hole auger, 7' Land Pride RB1584 rear blade, 3 point boom pole, 48" 4000# SSQA pallet forks

  10. #10
    Super Member JOHNTHOMAS's Avatar
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    Somerset, Ky
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    B2650 F3080 ZD326 Z122r RTV1140

    Default Re: Tires spinning

    Interesting info. I've seen men almost fight when one said they had 4wd which to them meant that all 4 wheels would turn at all times , guess I believed that in the beginning and believe most people stll believe that. Course the individual would have to get the 4wd all 4 all the time to get their vehicle and get one wheel or two on one side in mud or on ice or in a ditch to convince them that all 4 wheels do not always turn. That's about when the cursing and fighting would usually start.
    I know kubota calls their tractor or my tractors 4wd and I've often times seen that only 2 of the tires would turn (spin in mud or on ice) when in 4wd unless I stepped on the locking differential which would then make 3 of the tires turn while one was still not moving.
    Philip, what would you call that? I call it 3wd.
    2016 B2650, 2015 ZD326rp 60" rear Discharge Deck, 2012 F3080 4WD 72" rear discharge deck ,2015 Z122r, 2010/2009 RTV1140CPX , RatchetRake, BB, 50" Tiller, Forks, .. and Horse Drawn disk 13 Toyota Tacoma Double Cab, 15 Subaru Outback. 2012 MINI Cooper S Roadster

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