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  1. M

    JLG 40H - boom swing does not move in creep mode

    I wanted to circle back and let you know what I wound up doing to fix the creep mode on the swing circuit. First up, I failed to keep the control console dry and after the first rain, I went to use the lift and I discovered the hard way that the controls have a mind of their own when wet. I...
  2. M

    JLG 40H - boom swing does not move in creep mode

    Thanks Fixer - at this point I am fairly certain that all it needs is a calibration, the pressures are all in order, it appears that the analog signal in creep mode is not high enough to move the valve spool to get flow. I need to take the time to go through the manual and understand how to do...
  3. M

    JLG 40H - boom swing does not move in creep mode

    Thanks Stone . . . I have put about 20 hours on the lift over the last week. I noticed that when the lift is cold AND I have the boom nearly all the way up (I.e. Minimum drag on the rotate / boom swing axis) that the creep mode works very slowly. I'll check voltages going to the he...
  4. M

    JLG 40H - boom swing does not move in creep mode

    I located a 152 page PDF Service Manual. I was surprised at the lack of a complete hydraulic schematic. Does anyone know of a resource for a schematic for this machine?
  5. M

    JLG 40H - boom swing does not move in creep mode

    I recently bought a JLG 40H and have worked through a number of issues electrical, hydraulic and mechanical and now have everything working with the exception of the swing / rotate function when in creep mode. Oddly enough, this function did work when I first got the lift, but now after fixing...
  6. M

    JLG 40HA Basket Stuck, Not Rotating

    If you find that it stops working again, my JLG40H had a similar behavior and it was a sheared roll pin in the worm shaft coupled to the hydraulic motor. Worked intermittently for a while and eventually failed to work altogether. An easy fix once you figure out what the problem is.
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