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Need help with JLG HA-45 Manlift. Engine dies when switched from ground to platform.

Discussion in 'Forklifts/Telehandlers' started by cms, Oct 11, 2014.

  1. cms

    cms New Member

    Joined:
    Oct 11, 2014
    Messages:
    1
    Location:
    crescent city, california
    Having trouble with JLG 45-HA Manlift. When switching from ground controll to platform, engine dies.
    Has anyone else had this problem with their lift and been able to find and fix the problem? Any help would be greatly appreciated!
    Thanks in advance.

    cms
     
  2. BigPoppaPhil

    BigPoppaPhil New Member

    Joined:
    Oct 29, 2014
    Messages:
    1
    Location:
    Fenton,MO
    Can you start it from the platform and then quickly step on the pedal to keep it run?
     
  3. bcubes

    bcubes Member

    Joined:
    Jan 24, 2010
    Messages:
    7
    Location:
    Northern Illinois
    You need to check the 12/4 cable, going to the platform, for power going to the platform. In the lower control box locate the Black, Orange, Red and Blue 12 gauge wires at terminals 31, 32, 33 and 34. The Black wire on terminal 31 is ground for the platform. The Red wire on terminal 32 is 12 volts to the platform for the horn. That should have 12 volts when the master switch is on. The Blue wire on terminal 33 is ignition power from the platform. That should have 12 volts on it with both E-Stop buttons (base and platform) are pulled on and the select switch in platform position. The Orange wire on terminal 34 is 12 volts to supply all the function controls in the platform.

    Possible causes why the engine will not stay running (I'm assuming the engine does not crank either) are a bad contact block on the platform E-Stop button. A bad select switch in the ground control box. A bad circuit breaker in the platform control box or broken wires between the platform and base. It has been a while since I've worked on an HA so I'm sure I'm missing something. So while I'm trying to remember check for voltages at the 12 gauge wires described above.
     
  4. Svaby

    Svaby Member

    Joined:
    Dec 22, 2014
    Messages:
    9
    Location:
    Ohio
    X's 2 on the checking the e stop first open up the box and sure wires got good connections.