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Thumb problems on a komatsu

Discussion in 'Compact Excavators' started by 89.ho.ss, Aug 6, 2017.

  1. 89.ho.ss

    89.ho.ss Well-Known Member

    Joined:
    Dec 21, 2014
    Messages:
    75
    Location:
    eastern CT
    I have a Komatsu PC 75 uu-2. I bought a thumb for it and I installed it I have all of the hydraulic lines heading out to the end for the thumb in the pedal inside. The machine used to be set up for a rock hammer. Now I am finding that if I go to the left with the pedal it is high speed into the right of the pedal is low speed on the same hose. Does anyone know how I can make it so it flows both ways
     
  2. Shimmy1

    Shimmy1 Senior Member

    Joined:
    Aug 14, 2014
    Messages:
    2,209
    Occupation:
    My name is Brian, and I'm a workaholic.
    Location:
    North Dakota
    Better post your serial number.
     
  3. 89.ho.ss

    89.ho.ss Well-Known Member

    Joined:
    Dec 21, 2014
    Messages:
    75
    Location:
    eastern CT
    Serial number 5115
     
  4. 89.ho.ss

    89.ho.ss Well-Known Member

    Joined:
    Dec 21, 2014
    Messages:
    75
    Location:
    eastern CT
    I figured it out there was supposed to be a switch it was removed. So I put the line to the valve body and it all works