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Komatsu d61-12 Transmission Overheating

Discussion in 'Dozers' started by barnmb, May 14, 2019.

  1. barnmb

    barnmb New Member

    Joined:
    Feb 18, 2019
    Messages:
    1
    Location:
    Manitoba
    Hi I have a Komatsu d61-12. We are using it mostly for clearing land. After pushing for 2-3 hours the transmission overheats. if you let it idle for 10 minutes or so you are good for about another hour again. We recently rebuilt the oil cooler radiator and noticed no improvement. Any ideas where to look or what to check next?
     
  2. John C.

    John C. Senior Member

    Joined:
    Jun 12, 2007
    Messages:
    6,161
    Occupation:
    Machinery & Equipment Appraiser
    Location:
    Northwest
    Check stall speeds, pull strainers and filters checking for foreign material, use an infrared thermometer to identify where the heat is coming from and the difference in temperature between the inlet and outlet of the cooler.
     
  3. bam1968

    bam1968 Senior Member

    Joined:
    Nov 2, 2014
    Messages:
    317
    Occupation:
    Excavating Contractor
    Location:
    IA
    I had a d65-12 that had similar symptoms. The problem was that the brake peddle was stiff and not releasing all the way. Just my $.02