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  1. #1

    Join Date
    Apr 2002
    Posts
    2
    Location
    Texas Hill Country
    Tractor
    Kubota B7100

    Default Kubota B7100 overheating

    When mowing with a Land Pride 48" finish mower my B7100 (~1995, 4WD, 600 hrs) overheats. I have to let it cool down at idle for 10 minutes after about 1/2 acre. Does anyone have any suggestions?

    Glen Zoerner
    Texas Hill Country

  2. #2

    Join Date
    Feb 2002
    Posts
    129
    Tractor
    Kubota BX2200

    Default Re: Kubota B7100 overheating

    When was the last time you serviced the tractor and checked the fluids and had the filters changed?

  3. #3
    Veteran Member Dozernut's Avatar
    Join Date
    Apr 2002
    Posts
    1,524
    Location
    South Eastern Illinois
    Tractor
    Kubota L4610, ZD21, RTV900, B2630

    Default Re: Kubota B7100 overheating

    Have you cleaned the radiator screen? These will plug up with weed seed and chaff. If your not familiar, kubota has a removable nylon screen that sits in front of the radiator. This screen protects the radiator from plugging up. If you are mowing high grass or weeds or it is dry, you will need to clean this screen often. If this is not the problem you could have a water pump going bad. Check it by seeing if you have play in the bearings on the pump shaft. Grasp the fan spindle and see if it wiggles. If you have play then the bearings are going bad. These can be rebuilt but you would probably be better if you replaced the pump. Save your old pump for a return deposit. Hope this helps.

  4. #4
    Platinum Member
    Join Date
    Apr 2000
    Posts
    800
    Location
    East Tennessee
    Tractor
    B2910 & BX23 (previously B2150 & B7100D)

    Default Re: Kubota B7100 overheating

    gzoerner,

    In addition to the external inspection of the radiator, there are a couple of things that you need to check:

    Thermosiphon Cooling System: Ensure that you have the proper mix of water/antifreeze (50/50 max). Having greater than 50% antifreeze will cause overheating. Make sure that you know how the cooling system works. If you need details, let me know. I've posted the cooling system description a lot on this board in the past (since I had to rebuild my B7100 engine because of it...)

    Air Filter: I have heard that a dirty air filter will also cause a diesel engine to run hotter.

    Kelvin

  5. #5
    Elite Member
    Join Date
    Feb 2002
    Posts
    3,777
    Location
    western,pa.
    Tractor
    Kioti DK 35

    Default Re: Kubota B7100 overheating

    When you clean your radiator screen,also hose out the radiator cooling fins.
    Even with the screen in place they still build up with debris..

  6. #6

    Join Date
    Feb 2002
    Posts
    129
    Tractor
    Kubota BX2200

    Default Re: Kubota B7100 overheating


    Im wandering off topic here but it was amusing to an old engineer to have someone with the handle Kelvin posting about an overheating problem. Ill watch out for Fahrenheit and Celsius next.

  7. #7
    Super Star Member RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    18,328
    Location
    Bethel, Vermont
    Tractor
    John Deere 4400 MFWD, Deere 855D UTV and assorted implements

    Default Re: Kubota B7100 overheating

    Im wandering off topic here but it was amusing to an old engineer to have someone with the handle Kelvin posting about an overheating problem

    I know what you're talking about but you absolutely may have to explain this one, Wanker...







    (-273)

  8. #8
    Platinum Member
    Join Date
    Apr 2000
    Posts
    800
    Location
    East Tennessee
    Tractor
    B2910 & BX23 (previously B2150 & B7100D)

    Default Re: Kubota B7100 overheating

    Since I have a degree in Mechanical Engineering, I have had to perform many calculations using both the Rankin and Kelvin "Absolute" temperature scales.

    For a while I had a part-time Air Force job along with my full-time engineering job, but decided that the two jobs didn't leave enough time for my family, and since the Air Force job was better than the engineering job I decided to go full time Air Force (Air National Guard) and let the engineering skills suffer.

    But I still try to be an "absolute" kind of guy...

    Kelvin

  9. #9
    Platinum Member
    Join Date
    Apr 2000
    Posts
    800
    Location
    East Tennessee
    Tractor
    B2910 & BX23 (previously B2150 & B7100D)

    Default Re: Kubota B7100 overheating

    While we're wandering even further off course...

    I'm pulling this out of my head from over 10 years ago, but isn't it -273.15?

    Note that I'm too lazy to dig out the old books and look it up.

    Kelvin

  10. #10

    Join Date
    Feb 2002
    Posts
    129
    Tractor
    Kubota BX2200

    Default Re: Kubota B7100 overheating


    Actually its -273.1<font color=red>6</font color=red> <font color=blue>Celsius</font color=blue> that would be zero degrees Kelvin or "Absolute Zero" at which point all vibration of a particle is supposed to stop.

    Tsk Tsk

    (This could only amuse an engineer)

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