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Thread: Fan Clutch Conversion

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    MrAnderson's Avatar

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    Fan Clutch Conversion

    I just got my truck running after doing quite a bit of maintenance - the AC compressor locked up, and while I was up front, I replaced a lot.

    One of the things I replaced was the fan clutch with an aftermarket unit.

    Well, some of you probably know what happened there.

    The wires got into the fan somewhere around 150 miles after I installed it.

    They ripped outright at the fan clutch and were up against the block, throwing all kinds of codes, and ultimately took the truck down until I unplugged the wire.

    I've called a local shop and done some research, and apparently, this is how it goes with aftermarket fan clutches. I'd really rather have an old-school fan clutch in there and not worry about a wire 1/4" away from a fan.

    I've seen https://www.dieselpowerproducts.com/...e-cummins.aspx, and while it does allow the use of a mechanical fan, it's a Ford.

    It also replaces the factory fan pulley assembly to account for the difference in the thread size/pitch, so I'm not sure if it uses standard bearings that can be replaced as they wear out.

    I'm curious if anyone has been able to modify a 12v fan clutch to work with the 6.7L.

    I see the 12v fan is a 4 bolt, where the 6.7 uses a 6 bolt fan, which can be fixed with an adapter plate.

    I cannot find the thread specs on the 12v to know if it's the same size/pitch.


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    MrAnderson's Avatar

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    Re: Fan Clutch Conversion

    I decided to swap to the Ford 7.3 fan clutch using the Diesel Power Products adapter.

    I rounded out a couple of the small bolts holding the pulley to the adapter, so I left the secondary fan shroud off until I get the replacements in.

    So far, the truck seems to warm up a little faster, and it's staying just as cool.

    Last night I pulled a skid steer, and the temp didn't raise much - granted, I didn't have far to pull it, but it was up a hill, then on the way back, I floored it to get the temps up and add a little load.

    It seems to be doing better than the stock fan clutch.

    I'm using the Hayden 2835 fan clutch, which is a severe-duty clutch.


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