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Komatsu D31PX-21 Ser. #51474

Discussion in 'Dozers' started by terry evans, Jan 17, 2020.

  1. terry evans

    terry evans New Member

    Joined:
    Jan 17, 2020
    Messages:
    1
    Location:
    beaumont, tx
    Display code DD12KA Display screen goes blank and shuts movement of machine down. Need help troubleshooting problem.
     
  2. GODSDOZER

    GODSDOZER Well-Known Member

    Joined:
    Jan 7, 2011
    Messages:
    113
    Occupation:
    Dirt Contractor
    Location:
    East Texas
    Are there any Komatsu guys on here or just mainly Cat? 80 views and no replies :)
     
  3. John C.

    John C. Senior Member

    Joined:
    Jun 11, 2007
    Messages:
    11,713
    Occupation:
    Machinery & Equipment Appraiser
    Location:
    Northwest
    Lot of older gents and too few of these machines in the industry for a base of experience. We had so few problems with the small rice burners when I was working for the dealers that we never saw them again after the delivery checks were finished. You are going to need a service manual.
     
  4. bam1968

    bam1968 Senior Member

    Joined:
    Nov 1, 2014
    Messages:
    444
    Occupation:
    Excavating Contractor
    Location:
    IA
    I'm not sure if this applies to your machine but that code on a D65EX-15 is a disconnect in the shift up switch. IIRC when I had this code come up I don't recall the screen going blank. But the problem ended up being a wire being broke in the steering handle. Actually it was just below the steering handle at it's pivot point. I would assume that code would be the same for all models of dozers but I don't know that for sure. Good Luck
     
  5. liberian

    liberian Member

    Joined:
    Sep 11, 2016
    Messages:
    6
    Location:
    liberia
    as said before more than likely a broken wire under the control lever. info here..

    Screenshot (29).png

    Screenshot (30).png
     
  6. DK88

    DK88 Senior Member

    Joined:
    Jan 19, 2011
    Messages:
    320
    Occupation:
    Field service tech.
    Location:
    Ontario
    lift up the boot around the f-n-r lever, open up the clear tube over the wires and odds are one off the wires got caught on the corner of the block that the lever is bolted to and ripped the wires, very, very very common. just give the wires a little pull, on ocasion the wire wont be severed but the copper core will be.
     
    John C. likes this.