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Cat 7FB, pinning the engine fan

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Aug 11, 2025 at 6:46 PM.

  1. Aug 11, 2025 at 6:46 PM #1
    mile marker 27

    mile marker 27 Road Train Member

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    What size and length bolt to pin the fan? Does bolt thread into the hub? Can’t see the hole but it feels like a 1/4” bolt hole? IMG_6972.jpeg
     
    mile marker 27, Aug 11, 2025 at 6:46 PM
    mile marker 27, Aug 11, 2025 at 6:46 PM
    #1
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  3. Aug 11, 2025 at 7:15 PM #2
    mslashbar

    mslashbar Medium Load Member

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    elizabeth,co
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    5/16 x 1 grade 8
     
    mslashbar, Aug 11, 2025 at 7:15 PM
    mslashbar, Aug 11, 2025 at 7:15 PM
    #2
    Oxbow, Deere hunter, wore out and 1 other person Thank this.
  4. Aug 11, 2025 at 7:45 PM #3
    wore out

    wore out Numbered Classic

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    CHASIN THE DEVIL'S HERD
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    Preferably an Alan head some hubs are sorta tight to get a 1/2 inch head to turn
     
    wore out, Aug 11, 2025 at 7:45 PM
    wore out, Aug 11, 2025 at 7:45 PM
    #3
    mslashbar, Oxbow and Deere hunter Thank this.
  5. Aug 11, 2025 at 7:57 PM #4
    mile marker 27

    mile marker 27 Road Train Member

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    I noticed the hole in the hub, is real close to where the cast curves and a hex head won’t be giving up much room for a wrench. Preciate ya, sir. This truck doesn’t have a manual override switch to turn the fan on and I ain’t saying it needs it but I wouldn’t mind having one. I’m gonna carry a couple bolts with me just in case.
     
    mile marker 27, Aug 11, 2025 at 7:57 PM
    mile marker 27, Aug 11, 2025 at 7:57 PM
    #4
    Oxbow, Deere hunter and wore out Thank this.
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