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2002 Genie S40 problem

Discussion in 'Other Construction/Demolition Equipment' started by dmaxlb7, Feb 22, 2014.

  1. dmaxlb7

    dmaxlb7 Member

    Joined:
    Sep 7, 2010
    Messages:
    12
    Location:
    minnesota
    We have two identical 2002 S40s with Ford dual fuel. Recently one of them started acting up and it has me stumped. It will idle fine until you use one of the functions or switch it to high rpm. Then it will shut off like you hit the e-stop. No sputtering or anything. The oil safety shutoff seems fine. To make a long story short we switched the water temp sensors around from the other lift and now they are both doing this. So it seems the temp sensor is shutting it down. Can something be frying the sensors on the first machine? Is there diagnostic equipment available for these? This is getting frusterating. Any help would be much appreciated.
     
  2. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
    Messages:
    698
    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    First thing I always check on a dual fuel Genie that's acting up is the propane/gasoline toggle switch. I've seen a lot of them cause trouble like you are discribing
     
  3. theironoracle

    theironoracle Senior Member

    Joined:
    May 6, 2012
    Messages:
    924
    Occupation:
    OWNER/OPERATOR MOBILE HEAVY EQUIPMENT REPAIR
    Location:
    PACWEST
    I also have a problem with a genie s-40! The boom moves up very slow then will bleed down nearly as fast After you let go of the up switch. I held the boom up with my crane on my service truck capped the lines and let the pressure off my crane and the boom stays just fine. Swapped hoses with the jib function and it raises better but still drifts down! Help! TIO
     
  4. Moonlite

    Moonlite Senior Member

    Joined:
    Nov 12, 2013
    Messages:
    456
    Location:
    Texas
    I was thinking holding valves or emergency down valve. But being you swapped hoses and it made a difference im not sure now.
     
  5. Hardline

    Hardline Senior Member

    Joined:
    Nov 29, 2009
    Messages:
    340
    Occupation:
    Small business owner
    Location:
    Waxahachie Texas
    If the cylinder leaks down you either have a blown piston seal or a bad counterbalance valve.
     
  6. Tnlift1

    Tnlift1 New Member

    Joined:
    May 16, 2018
    Messages:
    2
    Location:
    Dickson Tn
    Has anyone encountered an issue with the oscillating manifold or cylinders my s40 will not self level it will repeatedly cycle and rock side to side