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  1. #1
    Gold Member
    Join Date
    Dec 2012
    Posts
    340
    Location
    Williamstown Ontario Canada
    Tractor
    Kubota M7040 Nuffield 465

    Default M7040 industrial tire pressure

    I have a new M7040 with FEL and cab which came with industrial tires.
    The front tires are 12.5 x 20 MITAS which is a size not shown in my owner's manual.
    The tire sidewall has a cautionary label about only qualified people servicing the tire but there is not a max pressure shown to use to seat the beads nor a pressure and load rating at that pressure.
    The rear tires have a label which says max pressure for setting bead is 35 psi. Rear tires are 16.9 x 28 and there is a pressure shown in owner's manual of 18 psi.

    During a recent snow storm, one front tire came off the bead which caused a few headaches I was not expecting with a new tractor with 30 hrs on it.

    Does anyone have information on the pressure I should be using and further why would this information not be on the sidewall?

    Dave M7040

  2. #2
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,420
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: M7040 industrial tire pressure

    You are running an MPT-01, 03, or 04 tread... look them up on this site: Mitas: Multipurpose (diagonal)
    Then click on details, (right hand column).... The majority of them show inflation to be either 300 or 350 kPa... that is: 43.5 psi or 50 psi.

  3. #3
    Platinum Member
    Join Date
    Apr 2012
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    743
    Location
    pa
    Tractor
    kubota 7040sud

    Default Re: M7040 industrial tire pressure

    i have a 7040 with r1s 30x16.9 rears 24x9.5 fronts 26 psi in the fronts 18psi in the rears that pressure kenny is to high i got that out of my manuel that came with the tractor

  4. #4
    Platinum Member
    Join Date
    Apr 2012
    Posts
    743
    Location
    pa
    Tractor
    kubota 7040sud

    Default Re: M7040 industrial tire pressure

    how do you like your tractor so far i have the gear tranny i should of gotten the hydrilic shuddle clhuting is a pain

  5. #5
    Veteran Member
    Join Date
    Jan 2010
    Posts
    1,706
    Location
    Piedmont, NC
    Tractor
    Kubota L4610 & BX2230, Farmall Super M, Super A

    Default Re: M7040 industrial tire pressure

    If you have a loader, you get in the habit of watching the front tires when carrying a respectable load. That's often a tip-off that they are low. Another seat of the pants method for telling if a tire is low is how the tractor handles on pavement in road gear. Low tires will often set up a bouncing motion front to back or pull to one side.

  6. #6
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,420
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: M7040 industrial tire pressure

    Quote Originally Posted by case245 View Post
    i have a 7040 with r1s 30x16.9 rears 24x9.5 fronts 26 psi in the fronts 18psi in the rears that pressure kenny is to high i got that out of my manuel that came with the tractor
    That is not going to be a recommended tire pressure for any particular application...
    That is The Tire Manufactures Rated tire pressure for His particular tire.
    You should run tire pressure according to various variables...

  7. #7
    Platinum Member
    Join Date
    Apr 2012
    Posts
    743
    Location
    pa
    Tractor
    kubota 7040sud

    Default Re: M7040 industrial tire pressure

    u cant fill a tire solid full of air a tire needs to flex to much are with a heavy load the tire will blowout

  8. #8
    Gold Member
    Join Date
    Dec 2012
    Posts
    340
    Location
    Williamstown Ontario Canada
    Tractor
    Kubota M7040 Nuffield 465

    Default Re: M7040 industrial tire pressure

    KennyV
    I had seen the Mitas web site previously. My tires are MPT-04 but 43 psi seems high for a farm tractor and I was not certain if the rims were designed for the full load capacity of the tires.
    To Case245: I really like my tractor but compared to 35 years with my Nuffield 465 it is a dream. I am struggling to get used to not touching the clutch pedal.
    Dave M7040

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