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The JLG 40F Boom Lift Dilemma

Discussion in 'Other Construction/Demolition Equipment' started by od1, Sep 13, 2009.

  1. TheBigDog

    TheBigDog Member

    Joined:
    Jun 2, 2021
    Messages:
    7
    Location:
    Ohio
    @OFF, I forgot to thank you for the info....it is working again!

    Also, is there a place to look up the serial number to verify the year it was made?

     
  2. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
    Messages:
    886
    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    You're very welcome, I'm always glad to help.

    The only way I know of to date an old JLG serial number is to contact JLG or have a friendly JLG dealer contact them for you.

    All my old contacts are dead by now I'm sure, and we went Genie in about 1990, so I haven't made any new JLG contacts. :)
     
  3. Jwells

    Jwells New Member

    Joined:
    Sep 27, 2021
    Messages:
    2
    Location:
    Ogdensburg, N.Y.
    I am new to this and not really much of a computer guy, but I bought a 40’ jlg lift a year or so ago. It’s a 1980 and now none of the functions are working at all. The local dealer only could tell me about this forum and couldn’t find what he needed for a wiring schematic. A lot of the wires and fuses are burnt up in the box behind the hr meter. Do I have scrap metal now or is there anything out there?
     
  4. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
    Messages:
    886
    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    Hello JWells. I can email you JLG 40F manuals and wiring diagrams as well as try and answer any questions you may have.

    I just need an email address to send the manuals to.

    Best way to do that is to click on my name, and in the little box that comes up, choose "start a conversation". That will send me a private message where you can put your email address without the whole world seeing it.
     
  5. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
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    886
    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    On units made before 1980, the first two digits on the serial number seems to me to be the year. People have told me that's wrong, but I don't think so. I worked on a lot of JLG's made in the 70's and the age seemed to fit.
     
  6. Jwells

    Jwells New Member

    Joined:
    Sep 27, 2021
    Messages:
    2
    Location:
    Ogdensburg, N.Y.
    Ok thank you! Also is it possible to buy original parts for a machine this old, such as that hr meter box I mentioned? Or do I look for an old dinosaur burial ground to try and get those parts? The local dealer can’t seem to have any luck, and the bigger dealers towards the bigger cities don’t want to help because it’s over 20 yrs old.
     
  7. Missingsoldier

    Missingsoldier New Member

    Joined:
    Sep 3, 2020
    Messages:
    4
    Location:
    Arkansas
    I have a new problem with my 40f. My basket level cylinder was leaking so I rebuilt it and now it will not go in and out. I am getting fluid to it but it will only go out and not back in. Is there a specific way to install it to get the air out?
     
  8. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
    Messages:
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    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    Start by looking up the JLG part number of what you need in the parts manual. Google that part number, you might get lucky. Many places sell obsolete parts and "jobber" parts.
    Also give that part number to your JLG dealer so he can run it. Dealers can't look up a part that old, but they can still run the number in the JLG system. Those two methods are all you have to work with.

    That main control box is going to be a tough find. However, I did have a NOS 40F basket control box in my dead stock, (I gave it to the person who started this thread) so it's not impossible.
    Good luck
     
  9. OFF

    OFF Senior Member

    Joined:
    Sep 30, 2009
    Messages:
    886
    Occupation:
    HD Mechanic/Shop Foreman
    Location:
    Alberta, Canada
    Have a look in the service manual for a bleeding procedure for the basket leveling cylinder.
    Make sure your lock valve is installed correctly and your hoses are on right. Have you tried tilting the basket from the ground controls? If you get it to move, run it fully extended to fully retracted a couple times and all air should be gone.