stuck axle clamp bolts

I want to replace the (leaking) seals on my Farmall 460 axles. I'm trying to remove the wheels. First one, with a five foot cheater, I was able to loosen the inside two stud bolts. I can't budge the two outside ones. Ideas? Thanks, kelly
 
What's worked for me is CONTINUOUS torque, and PB Blaster, and then heat as I can get it applied. I mean really torqued and left torqued for day after day. Not just try it and go away.
 
Patience (and lots of it), your favorite penetrating oil (or combinations thereof), and heat. I have taken apart many an implement for restoration and generally start the penetrating oil applications days or even weeks before dis-assembly starts. In the final stages heat will be your best friend. Even if you only get the nuts to turn a little bit ideally then the penetrating oil has a new area on. Some people prefer to use heat first. That works too.
 
My understanding is that just heat will not get it to break loose. First you heat it and then you cool the bolt head with a wet rag. Although it is not the head that is tight, it is the thread and so you may need to improvise. I loosen a brake bleeder by heating it first and then cooling it. With just heat, it did not come loose.
SDE
 
Put a rose bud tip on the torch, and they will come loose.(BTW, if you have never used a rose bud tip, you do not know the time and gas you can save.)
 

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