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Old 06-01-2019, 11:54 PM
dieselappnerd dieselappnerd is offline
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Default Tips to loosen fan?

Iím having trouble loosening the fan to remove it to access the water pump. Iíve watched DTR, but donít have an air hammer. Iíve seen a number of other vids which all use the trick of working with the belt on and placing something long into the hole on the fan pulley.

Iím seeing 2 things which seem to differ from the vids for me. 1) Iíve got a Banks High-Ram in the way so I canít go straight down. 2) the cover with the slits in it turns when I turn the fan, and I canít seem to find a way to slide something into it and force it to stopówhat exactly is it supposed to be catching on?

Any tips? Iíve already got the air filter, shroud, and radiator out. Iíve also removed the bolts on the diffuser/rear shroud so I can pull it right next to the fan.


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Old 06-02-2019, 06:52 AM
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Extended Power Extended Power is offline
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I used a round pry bar in the holes of the pulley, but bent it a bit trying to hold it solid enough to "SHOCK" the wrench I had on the nut.
If I remember correctly, I think I had a helper pull tight on the belt tensioner with a breaker bar, and wedged the pry bar against something, along with using a 10mm long wrench on the bolts of the pulley itself. Just be careful not to over tighten them...but it worked good.
Just remember, the nut comes lose easier when you "SHOCK" the wrench with a hammer.

Good luck.
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Old 06-02-2019, 07:02 AM
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Chisel and hammer works also. Line it up on one of the corners and angle it in the direction you want to turn it and hit it.

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Old 06-02-2019, 07:52 AM
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ghohouston ghohouston is offline
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All good advice. But I'd bet money you will have that fan off more than once in your ownership, and to me, that is well worth buying an air hammer and fan clutch wrench. Iirc its 47mm. You're talking having the fan off in under a minute, vs fighting it for God knows how long.
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Old 06-02-2019, 10:16 AM
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6.0 Tech 6.0 Tech is offline
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^Whs. Especially on a dual alternator truck, the air hammer is much easier than any of the other ways..,

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Old 06-02-2019, 11:15 AM
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You can rent/borrow the tool from local parts stores.
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Old 06-04-2019, 10:11 PM
Diesel625 Diesel625 is offline
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I have the special fan clutch wrench, but if it’s not handy at the moment, I’ll just put a long open end wrench on it and hit it with a hammer. It’s breaks loose real easy.
Old 06-05-2019, 05:41 AM
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Connor M Connor M is offline
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Iíve had my fan off 3-4 times in just over a year. I bent a few punches and was hitting a wrench with a hammer but after another guy in the shop let me borrow his air hammer I wonít go back.
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Old 06-05-2019, 08:03 AM
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BS Hauler BS Hauler is offline
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I just use a big Cresent wrench.
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Old 06-06-2019, 07:03 PM
dieselappnerd dieselappnerd is offline
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Well, I tried the air hammer thing and got a bunch of impact marks in the nut. I worry that thereís just way too much rust in there. The pulley directly below has a bunch or rust, and the undercarriage has a ton of rust. Iíve also tried a crescent wrench and a sledge hammer. Nothing seems to break it loose so far. I havenít ordered the wrench set from Amazon linked above since itís over $100...does the air hammer and chisel normally tear up the edge like that? Or does it usually give and turn before then?

Should I be looking to see if something else is broken on the assembly?

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