Stubborn waterpump fan nut

[TygreII]

I need ssome additional suggestions. The nut holding the fan on my waterpump is being stubborn.
I've tried: Pnumatic fan clutch wrench (90psi, 4500 hit/second)
PB Blaster
Heat gun
4 lb hammer

I really need to get this done.
Thanks ahead of time

Tygre

 

[hacked89]

It’s on the truck with the belts on?

 

[TygreII]

Yes.

 

[sjwelds]

Trying to remember, are these left hand threaded?

 

[TygreII]

My research said yes.

 

[Rondo]

Yes, reverse thread. I used a pipe wrench and a hammer and it popped it loose. Have someone squeeze the belts to hold the pump from moving.

 

[TygreII]

I've got the belts on too tight. The nut only moves when hitting it with the 4lb hammer.
I'm alone, so helpers are out of the question at the moment.

Edit: I meant that the whole pully moves with the 4lb.

 

[The_Josh_Bear]

Sounds like red threadlocker to me, might have to hit it with a torch for a bit. The heatgun might do the trick but the threadlocker has to be over 500*. I don't know if that's possible via a heat gun.

 

[TygreII]

I was kind of tinking it might be red. Is that going to mess up my fan clutch?

 

[hacked89]

In this situation oxy, put the wrench on and then you hit it quick with the hammer. The oxy may or may not ruin the fan clutch.

 

[TygreII]

If I have to mess up the fan clutch, so be it. I have to get the pump off and replace it. I might be able to find a butane torch. I'm not sure I canget my mits on a cutting torch. Definately not at 5pm on a Sunday.

 

[TygreII]

Thanks, everyone for the replies.
It finally broke loose.
Here's what I did:
Lots of PB Blaster (may not have had an effect)
Clamped one of the belts for extra holding power (thanks Rondo)
Got a bigger step so i could lean into the air hammer harder.

Everything else should be easier than that darn nut.

 

[The_Josh_Bear]

Did you find threadlocker in there?

 

[TygreII]

It didn't look like it. I think it was mother nature's thread locker (corrosion and time). It all looks original equipment, so 30 some years and a bad angle were holding me back.

Thanks again to everyone for your help. Both on and off this post. There are lots of helpful ideas out there.

 

[Old Goat]

I had a piece of this chain, called double loop.

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The 7.3 engine I was working on was sitting on the floor, and I needed to remove the Fan/Clutch.
I removed one of the bolts on the face of the pulley. Attached the chain with the bolt through the loop, and screwed the bolt back in.
The other end attached it to one of the bolts for the virticale bracket to the Alternator adjusting piece.
Make sure the Pulley bolt is on the top right, then straight across to the other bolt.

Put the Fan Nut Wrench on the big Nut leaning towards the right, (Drivers side) and hit it with a BFH. Comes right off.


Goat