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  1. #1
    Bobtail Member
    Member Since
    Dec 2010
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    ISX 450 fan clutch

    If I understand correctly, the fan clutch releases with air applied? My fan never stops and I don't find a air leak. Any ideas or do I have the wrong concept?


  2. #2
    Road Train Member
    Member Since
    Dec 2009
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    AL/TN BORDER
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    12 Years
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    could be the selenoid switch or a blown fan fuse.

  3. #3
    Light Load Member
    Member Since
    Jul 2010
    Location
    Elko, MN
    Trucker?
    EX-28 Years
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    Some use air to release and others use air to lock. Some also have the ability to be locked on by screwing bolts into them. Cummins uses the ECM to ground out the fan clutch to make it work. A short in that part of the ECM will also cause it to stay on. First thiing is to put ait to the fan hub an see if it unlocks. If it does then the problem is elsewhere.

  4. #4
    Bobtail Member
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    Dec 2010
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    Thanks guys, gives me a good start.

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