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  1. #1
    Veteran Member
    Join Date
    Jan 2004
    Posts
    1,521
    Location
    Polk Co , Fl
    Tractor
    bx1800

    Default BX running hot

    My little bx was running hot and did not seem to be pumping water so I removed the thermostat and it is now pumping water but still will run hot. My assumption is the radiator is so small the coolant will not slow down enough to just run without the thermostat. I have one ordered and it should be here Friday.
    Do you guys feel my assumption is correct or might I have another problem?
    Kubota BX1800 60" mm deck , 42" land Pride box blade

  2. #2
    Silver Member
    Join Date
    Jul 2010
    Posts
    124
    Location
    East Texas
    Tractor
    Kubota (do not currently have one of my own)

    Default Re: BX running hot

    Chucko,

    I have seen this 1,000 times. I would like to give you some advise. Please don't get mad at me, I could be wrong. However, if I answered this way to everyone who had your complaint, I would be right far more times that not. If I were you, I would remove the radiator from my tractor and visually inspect. On these smaller units, I have seen numerous times where a customer does clean his radiator, and the radiator looks to be clean while it is inside the tractor. Upon removing the radiator in my shop, I find that it is not clean, although it did look that was when it was installed in the unit. Also, removed the raidator cap from the radiator (not with hot coolant). Look at the groove or ledge in the top of the radiator that the cap seals on. Is it smooth or is it damaged and erroded? If it is not smooth (it should be raised, don't get me wrong, but it should be nice and smooth), then you need a new radiator because yours is not sealing properly and it will not hold pressure like it should.

    As for the thermostat, removing the thermostat will only cause (at least negative effects) the engine to take longer to reach operating temperature. It will not allow the coolant to flow so fast that the radiator does not work. The fins inside the radiator restrict the flow of coolant (due to their size), the thermostat only turns "on/off" the coolants access to the radiator (and regulates how much flow goes to the radiator based on temperature). It does this for the sole reason of getting the engine up to operating temp.

    I hope this helped you out some. Like I said, I would get that radiator out and inspect it before I spent any more money or used the equipment again on a hot day. Just my 2 cents.

  3. #3
    Veteran Member
    Join Date
    Jan 2004
    Posts
    1,521
    Location
    Polk Co , Fl
    Tractor
    bx1800

    Default Re: BX running hot

    thanks. I will check that out


    I have not looked at thating the radiator out is it fairly easy to get out?
    Kubota BX1800 60" mm deck , 42" land Pride box blade

  4. #4
    Veteran Member
    Join Date
    Mar 2004
    Posts
    2,438
    Location
    20 mi SE of Sacramento, CA-rural
    Tractor
    Kubota BX2200

    Default Re: BX running hot

    There are numerous threads on this issue. Sometimes the problem has been the thermostat. Most often, it seems to be tiny stuff clogging the radiator. When I brush hog my wild oats after they've dried, huge amounts of fluffy chaff gets into the air. The fan sucks it into the input in front of the driver, below the steering wheel. I have to wipe the outer screen clean about every 4 min. Every 25-30 min. I have to take the tractor to the garage and use the whole house vacuum with the skinny wand attached to clean both screens AND the radiator face. This is a powerful vac. It's important to get behind the battery and clean every sq. inch thoroughly. Some use an air compressor hose to blast from the other side. This has been a problem for numerous BX owners and there are many threads about this in the archives if you care to search for lengthier discussion.

  5. #5
    Gold Member
    Join Date
    Nov 2009
    Posts
    292
    Location
    Wichita, Ks. metro area
    Tractor
    Kubota B1750HST

    Default Re: BX running hot

    Like Tom says, clean the side screens and look for a screen at the radiator. My B1750 used to run hot as h_ _ _ until I started blowing out the screens with my leaf blower after each mowing.

  6. #6
    Super Member grsthegreat's Avatar
    Join Date
    Jan 2011
    Posts
    6,439
    Location
    north idaho
    Tractor
    dk45se hst cab

    Default Re: BX running hot

    I always blow out the radiator fins with compressed air. Its amazing how much crap gets stuck inside the fins. Totally neutralizes any cooling action on the radiators part.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  7. #7
    Elite Member
    Join Date
    Jan 2010
    Posts
    2,533
    Location
    Northern, IL
    Tractor
    Branson 2400H

    Default Re: BX running hot

    Where is the temperature sesor located on the BX1800? If it is like my 1850 it is right next to the muffler and this also helps increase the temp reading. Another board member suggested putting an insulating wrap around the wires and sensor and this helped on my BX. The wrao is typically used or race cars etc. I am sorry but I can not remember the name of the product at this time.

    Roy
    Artificial Intelligence will never overcome natural stupidity.

    Branson 2400H MMM & FEL

    JD 112

    BX1850 gone but not forgotten

  8. #8
    New Member
    Join Date
    Nov 2009
    Posts
    20
    Location
    South Central PA
    Tractor
    Kubota BX2200

    Default Re: BX running hot

    My BX began to run hotter one time too. If you remove the slide in screen you will likely notice debris clogging the radiator fins. Just blows it out with an air hose and the temperature will return to normal. No need to remove it.

  9. #9
    Super Member radioman's Avatar
    Join Date
    May 2008
    Posts
    5,511
    Location
    Ontario, NY
    Tractor
    Kubota BX24

    Default Re: BX running hot

    did you clean the prefilter screen yet like other poster said? did you take screen for battery and clean that too? slide the battery out and observe the rad fins. chances are it needs to be cleaned out. IF none of this is working out, I would pull the rad out and take to your local radatior repair shop to have it inspected and tested. several of your cooling tubes may be clogged.

  10. #10
    Veteran Member
    Join Date
    Jan 2004
    Posts
    1,521
    Location
    Polk Co , Fl
    Tractor
    bx1800

    Default Re: BX running hot

    I clean the screen every time I fuel . However like suggest I looked a little closer and it was clogged with what looked like wet babby powder


    Tex was 100% right


    Seems the screen would should be finer than the radator not the other way around
    but now I know what to look for so it's no big deal
    Kubota BX1800 60" mm deck , 42" land Pride box blade

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