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  1. #1
    New Member
    Join Date
    Nov 2012
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    3
    Location
    Winterville, Georgia
    Tractor
    John Deere 6430 standard

    Default JD 6430 MFWD will not engage

    Out of the blue my 6430's MFWD will not engage. Someone suggested weeds may have ripped a wire off underneath but have not been able to locate a suspect wire. Also checked fuse panel diagram and everything looks ok there. Anybody have any experience with this. I need to do some chisel plowing before we go to the NAILE Tuesday!

  2. #2
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Posts
    7,592
    Location
    Eastern NY
    Tractor
    Case 885, Ford 4000

    Default Re: JD 6430 MFWD will not engage

    MFWD is typically spring applied and hydraulically disengaged. Your 6430 is not likely to be different. Lack of MFD is not likely to be caused by an electrical or hydraulic fault, but will result from a mechanical failure within the system.
    We have too much gun control.
    What we need is more idiot control.

  3. #3
    New Member
    Join Date
    Nov 2012
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    3
    Location
    Winterville, Georgia
    Tractor
    John Deere 6430 standard

    Default Re: JD 6430 MFWD will not engage

    RickB, thank you for responding. What is the electrical MFWD switch on the side console activating/inactivating?

  4. #4
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Posts
    7,592
    Location
    Eastern NY
    Tractor
    Case 885, Ford 4000

    Default Re: JD 6430 MFWD will not engage

    Quote Originally Posted by HMEHEREFORDS View Post
    RickB, thank you for responding. What is the electrical MFWD switch on the side console activating/inactivating?
    A hydraulic solenoid valve. Regulated circuit pressure applied to the MFWD clutchpack holds it in the disengaged position. Removing electrical current from the valve and oil from the clutch allows the spring to engage the clutch.
    We have too much gun control.
    What we need is more idiot control.

  5. #5
    New Member
    Join Date
    Nov 2012
    Posts
    3
    Location
    Winterville, Georgia
    Tractor
    John Deere 6430 standard

    Default Re: JD 6430 MFWD will not engage

    So possibly a broken spring? I am assuming since the dash light does not come on when I flip the switch on there is a signal not being sent back to it.

  6. #6
    Elite Member Zebrafive's Avatar
    Join Date
    Aug 2010
    Posts
    3,072
    Location
    South West MI
    Tractor
    John Deere 2030, John Deere 6415

    Default Re: JD 6430 MFWD will not engage

    RickB is correct, Belleville springs are used to engage MFWD. It is possiblle your solinoid has failed, it allows pressurised oil to keep the MFWD clutch pack released. If it does not shift the spool of the MFWD valve to block the pressured oil, the Belleville springs can not engage the clutch pack. So you need to check the solinoid, if it checks OK, check the valve it controls it might be seized up.
    John Deere 2030 JD 245SL Loader
    John Deere 6415 mfwd JD 640SL Loader

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