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  1. #1
    New Member
    Join Date
    Nov 2012

    Default John deere 7320 alternator

    Alternator went out on John deere 7320 tractor. Carried it to vocal alternator & starter shop to get it rebuilt . Bearings were down. Got it fixed. Put it back on an every time u crank it a warning code comes up saying check alternator or v- belt. You can idle it up a couple hundred rpm an then back to idle an the code goes off an does not come back on until you cut the engine off an re-crank it. Battery is staying charged up. Needing information on what my trouble could be.

  2. #2
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Coyote Flats,Tx
    JD 4255/Kubota M7040 HDC

    Default Re: John deere 7320 alternator

    Sounds as if alternator belt needs tightening to eliminate belt slippage on initial start-up or rebuilt alternator must attain a higher than idle engine speed to begin charging.

  3. #3
    Veteran Member
    Join Date
    Dec 2001

    Default Re: John deere 7320 alternator

    Another possibility is incorrect belt routing. Sometimes the serpentine belt can be installed different ways. This can result in low tension or not enough belt wrap around the pulley.

  4. #4
    Super Member RickB's Avatar
    Join Date
    Sep 2000
    Lincoln County, NC need new avatar!
    Just a Scag

    Default Re: John deere 7320 alternator

    Poor connection/high resistance in the excitation circuit or within the alternator itself.
    Spring is the season of optimism.

  5. #5
    Platinum Member
    Join Date
    Apr 2011

    Default Re: John deere 7320 alternator

    +1 rickb .run it some more it may clear up.brushes may not be seated yet.

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