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  1. #1

    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
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    4,434
    Location
    Coyote Flats,Tx
    Tractor
    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
    Platinum Member
    Join Date
    Dec 2001
    Posts
    961
    Location
    Maryland

    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
    Posts
    7,312
    Location
    Eastern NY
    Tractor
    Case 885, Ford 4000

    Default Re: John deere 7320 alternator

    Poor connection/high resistance in the excitation circuit or within the alternator itself.
    We have too much gun control.
    What we need is more idiot control.

  5. #5
    Platinum Member
    Join Date
    Apr 2011
    Posts
    736
    Tractor
    cx70,5510,4630,5005

    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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