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-   -   Loosening Fan Clutch Nut (https://www.dieseltruckresource.com/forums/12-valve-engine-drivetrain-100/loosening-fan-clutch-nut-329742/)

Robert Rausch 02-02-2018 06:34 PM

Loosening Fan Clutch Nut
 
Any tips on loosening a stuck fan clutch nut? I know it's a left hand thread, and to loosen it I should turn it clockwise. I can't seem to budge it. I've tried to stick a screwdriver between the pulley bolt heads, but I can't budge the thing. I'm using a 36 mm fan clutch wrench I borrowed from NAPA.

gorms 02-02-2018 10:08 PM

I've had good luck with locking chain pliers (vice grip type) right on the fan pulley, with a good rag under it to protect pulley. Smacking the edge of the nut with a long chisel to loosen it (cw) can help free it up. Cheater bars/pipes can be your friend too.

torquefan 02-02-2018 10:26 PM

If you have access to an air chisel, place the tip on the edge of the nut, pointed in the correct direction, and a very short burst usually cracks it loose without any damage.

Robert Rausch 02-03-2018 12:26 AM

Great suggestions both. Thanks gents.

NJTman 02-03-2018 08:08 AM

Buy, or make yourself, a clutch fan wrench set.

Once the one wrench is on the clutch fan nut, I smack it with a hammer, which releases it.

I made my own set from scrap steel, but I've seen them for sale on eBay or Amazon for about $25

Robert Rausch 02-03-2018 10:12 AM

I borrowed one from NAPA and climbed up on top the engine and put my whole weight on it while holding the pulley with a screwdriver and I still couldn't budge it.

NJTman 02-03-2018 05:46 PM

Quote:

Originally Posted by Robert Rausch (Post 3343413)
I borrowed one from NAPA and climbed up on top the engine and put my whole weight on it while holding the pulley with a screwdriver and I still couldn't budge it.

With a screwdriver, I couldn't get it to work either. When I did my KDP , I was replacing my fan clutch, and I used an impact gun. It damaged the clutch fan nut, but I didn't care.

If the nut is that tight, you will need the big mouth wrench for the pulley bolts, and the smaller wrench for the nut. Smack it with a hammer, and it should come off. Try heat before might help. The threads will most likely be clean, once removed, unless something screwy went down

See here. https://www.dieseltruckresource.com/...y-92-a-305946/

patdaly 02-05-2018 06:06 PM

A solid whack with a brass drift will usually make it a simple task to take off. The sharp vibrations usually break the bond.

Robert Rausch 02-05-2018 06:18 PM

Thanks Pat. I'll try that.

NJTman 02-06-2018 07:53 AM

Yeah, thanks Pat!

BigIron70 02-06-2018 06:15 PM

1 Attachment(s)
I use this tool works great removing and installing

BigIron70 02-06-2018 06:24 PM

Takes any fan off in 2 seconds.

deere country 02-06-2018 09:17 PM

I posted a picture of that pneumatic set a while back. It works better than any thing else I have used and best of all you don't run the risk of destroying the nut with an air chisel.

I have had some that still took some taps with a ballpean hammer before the air tool set would take them off.

torquefan 02-07-2018 09:50 PM

Quote:

Originally Posted by BigIron70 (Post 3343681)
I use this tool works great removing and installing

Very true, have used that before as well. Someone sure came up with a brilliant invention.

Robert Rausch 02-07-2018 10:17 PM

Those pneumatic sets are expensive little buggers. I think I'll make my own. Thanks for the great idea. I'll let you all know how it goes.


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