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  1. #1
    Super Member texasjohn's Avatar
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    Default RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    Smelled something burning/overheated..water temp near red line, ran hose on radiator/engine, noticed fan not running.
    Discovered electric fan motor got HOT , melted plastic fan off motor and fan attachments to radiator shroud. Subsequent analysis shows the fan to be the only failing cooling system component, all else OK.

    300 hrs, 25 months old, out of warranty but that's just too soon for such failure. Took parts to dealer where I purchased RTV. Told them I considered it to be manufacturer defective component and requested replacement parts. They agreed there were no signs of abuse. Salesman said he would see what he could do, but didn't sound too hopefipul.

    Radiator shroud, fan mount, fan and fan motor are sold only as a complete unit... for $495! Another reason to ask for relief.

    Then I brought it all back home, cannabalized an electric fan from a 20 yr dead old Toyota, did some fabrication, installed it into RTV kubota shroud and took it for a test drive. All works fine. Thermostat turns fan on and off at appropriate temps keeping coolant/engine at proper temp.

    So, am back on the road and avoided a $500 bill.

    We'll see if Kubota offers anything. Sorry, no photo...just glad to find a fix for free...good to have stuff lying around!
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

  2. #2
    Elite Member MotorSeven's Avatar
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    Kioti DK40SE Hydro

    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    TJ, that's odd, while researching the Chinese bred UTV's I saw a couple of threads on the same type of problem. I wonder if those cooling fans are Chinese and not Japanese? Can you do a forensic exam on the burned carcass for the Mfg country?
    2008 KIOTI DK40Se Hydro
    1978 Sling Blade/wood handle

  3. #3
    Super Member texasjohn's Avatar
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    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    Motor is much heavier than any of the fan motors from my Toyota Camry vehicles. It is encapsulated totally in a metal case slightly bronze in color. It appears completely water and dust tight. Copper lead wires are either12 or 14 gauge by eye/guess. Workmanship seems to be superb. ONLY markings on it are dot engraved on the back/terminal side of the motor as follows

    12V
    MITSUBA TOZ14

    an arrow pointing right is engraved above the TOZ14

    There is no country of origin indicated

    hmm..did a search for mitsuba fan and found this...appears identical to my busted one but not clear it is...$51, however!
    http://www.amazon.com/Mitsuba-1026AM...productDetails
    Last edited by texasjohn; 04-14-2013 at 01:52 AM. Reason: search results
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

  4. #4
    Super Member texasjohn's Avatar
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    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    Dealer called...talked with his supplier...no joy...out of warranty, stuff breaks....I still think it should not have failed at 300 hrs and CERTAINLY should not be $500 from dealer

    Only good news is I discovered the problem before extreme overheat and was able to use a spare fan I already had. So, a pain and a few hrs spent on dealer and my own repairs. Now back in service.
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

  5. #5
    Elite Member DT86's Avatar
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    Kubota 9540, RTV 900 and David Brown 885.

    Default

    That sucks. I just had to replace the starter on my 900 with less than 700 hours on it. I looked around online and bought a new one for $86 delivered, I'm sure kubota would have wanted at least twice that.

  6. #6
    Super Member texasjohn's Avatar
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    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    Got a 24 month customer satisfaction survey in the mail today. I let them know I was not happy about melted fan/motor, included my phone number as requested. we'll see if I get a call. it covered dealer and equipment, will also be sent to dealer.

    my replacement fan, from my Toyota parts vehicle, continues to cool properly.
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

  7. #7
    Elite Member MotorSeven's Avatar
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    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    I think that's a good call using one from a Toyota.
    2008 KIOTI DK40Se Hydro
    1978 Sling Blade/wood handle

  8. #8
    Super Member texasjohn's Avatar
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    Default Re: RTV 1140 radiator electric fan motor overheats, melts fan, shroud

    yep, it's been resting about 5 years and is maybe 20 years old and I still have its brother, so should be good for an RTV lifetime.
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

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