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  1. #1
    New Member
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    May 2012
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    7
    Location
    Peterborough
    Tractor
    Ford 8n, Yardworks Lawn tractor, john Deere 640

    Default JD 640 front loader 1999 help

    I am using a 1999 JD 640 with no operators manual and have found myself in a predicament that may just be finger trouble, the up and down and dump and scoop joystick will not let me operate the controls and is stuck in bucket dumped and down position turning on the engine causes the front wheels to come off the ground (scarey)pushing forward gets it to ground level but no more control. It was working for a day(all controls) then I was told to press the joystick forward and right and the plastic knurled ring under the joystick boot to where a pad lock is visible . I did this and it wont come out of that position and the tractor is stuck in this mode (useless) to continue. I may have inadvertently pushed pressed or switched something to make the joy stick un responsive """""HELP""""" Please
    Thanks Wayne
    Never go from a 48 8n to a 640 to complicated lol !!

  2. #2
    Platinum Member
    Join Date
    Sep 2010
    Posts
    672
    Location
    Virginia
    Tractor
    5210 MFWD

    Default Re: JD 640 front loader 1999 help

    The following URL will give an online operators manual. Just enter 640, there does appear to be 6 versions out there based on serial number of the loader and type of loader. Hope this helps

    John Deere Ag - New Equipment: Technical Publications - Equipment List

  3. #3
    Elite Member Zebrafive's Avatar
    Join Date
    Aug 2010
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    2,975
    Location
    South West MI
    Tractor
    John Deere 2030, John Deere 6415

    Default Re: JD 640 front loader 1999 help

    You need to work with the plastic ring below the lever boot. It can be hard to turn and get the gates in the proper places so the joystick will respond. It can lock out all functions, lock the boom and allow the bucket to operate, lockout the bucket and allow the boom to operate, or allow everything to operate.

    Try moving the joystick and at the same time turnng the lock ring. Tractor need not be running to do this.

    My 640 loader is a 2006 and it (lock ring) does not work properly, so I leave it for all functions to work. Poor design in my opinion
    John Deere 2030 JD 245SL Loader
    John Deere 6415 mfwd JD 640SL Loader

  4. #4
    New Member
    Join Date
    May 2012
    Posts
    7
    Location
    Peterborough
    Tractor
    Ford 8n, Yardworks Lawn tractor, john Deere 640

    Default Re: JD 640 front loader 1999 help

    Thanks for that link it has really helped
    Cheers
    Wayne

  5. #5
    New Member
    Join Date
    May 2012
    Posts
    7
    Location
    Peterborough
    Tractor
    Ford 8n, Yardworks Lawn tractor, john Deere 640

    Default Re: JD 640 front loader 1999 help

    This is exactly what I think is happening as I have tried moving that knurled plastic ring which appears to be really shaky. And have recovered some of the motion then it will happen again unexpectedly ,I wonder if that ring is necessary I assume its to lock out the Joy stick while driving on the road and not have an accidental bucket drop to the road with cars behind you causes sparks or gravel to fly and tempers to flare.....It is really mickey mouse it should be made of metal with less chance to wear or wobble. Thanks for your help if you have any ideas on removing the ring let me know please.It is a model 6310 JD 1999

  6. #6
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    4,539
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: JD 640 front loader 1999 help

    Is your loaders joystick "in console style" or out of console?? I downloaded a schematic of the parts of the out of console style JS(I was guessing). Maybe that will help you unlock it.
    Attached Thumbnails Attached Thumbnails -wp5626_________un14may04-gif  

  7. #7
    New Member
    Join Date
    May 2012
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    7
    Location
    Peterborough
    Tractor
    Ford 8n, Yardworks Lawn tractor, john Deere 640

    Default Re: JD 640 front loader 1999 help

    I believe it's in console and is similar to the great schematic u sent but there is no rubber boot which leads me to believe there may be some subtle changes between in and out console type , if you had one of the inside that would be greatly appreciated.
    Thx Wayne

  8. #8
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    4,539
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: JD 640 front loader 1999 help

    Here's the other photo.
    Attached Thumbnails Attached Thumbnails -wp6241_________un15dec05-gif  

  9. #9
    New Member
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    May 2012
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    7
    Location
    Peterborough
    Tractor
    Ford 8n, Yardworks Lawn tractor, john Deere 640

    Default Re: JD 640 front loader 1999 help

    Thanks again TX JIM another great schematic to ponder
    Cheers
    WS

  10. #10
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    4,539
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: JD 640 front loader 1999 help

    stonz22
    You can view those schematics on JDparts.com.

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