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Hi

I tried desesperately to unscrew/remove the two nuts of the castor arm to adjust them later, after rebuild.
No issue, I tried everything they don't want to move.
I'm thinking the last solution would be to cut them with a grinder but I don't know if the nuts are avaible separately and where.
Thanks for any help
 

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One of the nuts is 'left hand' thread so that might be difficult to source locally. (You aren't trying to 'tighten' the already tight left hand nut are you?)

If you have the castor arm removed from the car I would soak it for a few days with a good rust penetrant - apply 2-3 times a day for 3-5 days. I like PB Blaster. I'vealso heard good things about 'Kroil'. Don't bother with WD-40. Then clamp it in a vice and apply leverage - a large wrench with a pipe over the handle to increase the force you can apply. Heat can help, too - propane or mapp torch, re-apply the penetrating oil and leverage.

Once you get it apart, clean the threads and apply some anti-seize. Your heirs will appreciate it.
 
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