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11-04-2012, 06:15 PM #1
- Join Date
- Nov 2012
- Posts
- 1
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.
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11-05-2012, 07:42 AM #2
- Join Date
- Jan 2007
- Posts
- 7,170
- Location
- Coyote Flats,Tx
- Tractor
- JD 4255/Kubota M7040 HDC
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.
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11-05-2012, 09:15 PM #3
- Join Date
- Dec 2001
- Posts
- 1,353
- Location
- Maryland
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.
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11-06-2012, 05:57 AM #4
- Join Date
- Sep 2000
- Posts
- 9,536
- Location
- Lincoln County, NC need new avatar!
- Tractor
- Just a Scag
Re: John deere 7320 alternator
Poor connection/high resistance in the excitation circuit or within the alternator itself.
Spring is the season of optimism.
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11-09-2012, 10:06 AM #5
- Join Date
- Apr 2011
- Posts
- 746
- Tractor
- cx70,5510,4630,5005
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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