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Thread: Possible bad alternator

  1. #1
    Join Date
    Oct 2004
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    Cape Cod, MA
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    Possible bad alternator

    For the past week I have been chasing what I thought was a bad pulley. It turned out it may be the Alt clutch. The symtoms were at low speed 900 rpms a sound of belt squeel & the volt meter in the gauge pod showed up at 10 amps. This went on for ten mins while in stop & go traffic almost like the alt pulley was seezing up. Then out of no where the squeel stoped & the volt meter jumped up ot 12.5. Whats up with that ?
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  2. #2
    Join Date
    Sep 2010
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    Western WA
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    It certainly is possible that the clutch pulley is starting to "strip" and thus allow slippage in the wrong direction. That could account for squalling noise and low voltage.

    Just last week we got a news letter from Gates via O'reilly's, where they have a cutaway pic of the type of clutch pulley that is on our cars. I keep meaning to bring home, scan it and post it.

  3. #3
    Join Date
    Oct 2004
    Location
    Cape Cod, MA
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    Can some one tell me how the clutch on the alt works & how to check function ?
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  4. #4
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    Sep 2007
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    townsend DE
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    i have 2 if you need one Kurt
    2010 fusion se


  5. #5
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    Thanks Dave just wondering if I can be repaired or if it is the clutch & process to be sure it is the clutch or if I just need to replace the entire alternator.
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  6. #6
    Join Date
    Sep 2007
    Location
    townsend DE
    Age
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    Posts
    12,474
    Quote Originally Posted by burt ragio View Post
    Thanks Dave just wondering if I can be repaired or if it is the clutch & process to be sure it is the clutch or if I just need to replace the entire alternator.
    i ment i have 2 clutched pulleys as well.
    2010 fusion se


  7. #7
    Join Date
    Oct 2004
    Location
    Cape Cod, MA
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    67
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    2,601
    I understand. I just need to know how to check to make sure it is the clutch in the alt.
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

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