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Komatsu excavator control selector?

Discussion in 'Excavators' started by jca57jd, May 21, 2011.

  1. jca57jd

    jca57jd Well-Known Member

    Joined:
    Mar 26, 2009
    Messages:
    117
    Location:
    NC
    Do komatsu excavators have a control pattern selector (backhoe style)? To be specific a pc78? If so were would the selector be located?

    Thanks,
    John
     
  2. jimsbcs

    jimsbcs Member

    Joined:
    Dec 8, 2006
    Messages:
    19
    Location:
    Tioga,ND
    My mid 90's PC40-8 doesn't. I just switched around the pilot control hoses on the valve body block to switch control pattern.

    Jim
     
  3. joelmartin

    joelmartin Well-Known Member

    Joined:
    Jun 30, 2010
    Messages:
    77
    Occupation:
    Freightliner dealership. JD Master tech.
    Location:
    Lebec, California
    Don't get too high tech about it. So you want to swap boom and stick from left to right joystick. Follow the hoses from the boom cylinder to the valve. Same for the stick. After putting color coded plastic ties to mark where they were, disconnect the pilot hoses and swap them. simple things for simple people. I am a simple person. werks fer me.
     
  4. Tony

    Tony Well-Known Member

    Joined:
    Aug 20, 2007
    Messages:
    92
    Location:
    New York, USA
    Jca,

    Your PC78-6 or PC78-8 should have a pattern control changer as standard equipment. The changer is located in the small compartment door on the left side of the machine just below the cab door. Simply back out the lock nut, switch the lever to whichever position you want (SAE=Backhoe, ISO= Excavator) and lock down the lock nut. This is a 5 minute operation, tops.

    Hope this helps. Let us know how you make out.

    Best,
    Tony
     
  5. John C.

    John C. Senior Member

    Joined:
    Jun 12, 2007
    Messages:
    3,870
    Occupation:
    Machinery & Equipment Appraiser
    Location:
    Northwest
    Is this machine gray market or domestic?

    Some gray market machines have a six position selector that looks like a barrel with hoses connecting to it all around. Domestic machines never have that.

    Some domestic machines have the two position selectors but I'm not familiar where they might be located.