ISX 450 fan clutch

Discussion in 'Trucks [ Eighteen Wheelers ]' started by ejm, Dec 30, 2010.

  1. ejm

    ejm Bobtail Member

    Messages:
    16
    Thanks Received:
    4
    Joined:
    Dec 1, 2010
    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. heavyhaulerss

    heavyhaulerss Road Train Member

    Messages:
    2,975
    Thanks Received:
    1,358
    Joined:
    Dec 23, 2009
    Location:
    AL/TN BORDER
    could be the selenoid switch or a blown fan fuse.
     
  3. Smalltruck

    Smalltruck Light Load Member

    Messages:
    141
    Thanks Received:
    47
    Joined:
    Jul 3, 2010
    Location:
    Elko, MN
    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. ejm

    ejm Bobtail Member

    Messages:
    16
    Thanks Received:
    4
    Joined:
    Dec 1, 2010
    Thanks guys, gives me a good start.