Old 04-28-15, 01:54 AM
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If the main hinge pin is free enough to move by 5mm and can rotate freely then it seems unlikley what welding something onto it to pull it out will work. Is there even enough space around the recess to get a welding tip or rod to contact the end of the hinge pin? I suspect that either there is a burr on the inside of the recess which is stopping the pin from dropping out or the hinge pin is bent. The latter is more likley as you have already opened the recess out with a dremel. I think you might need to take it to an engineering shop that has a good pillar drill with a large machine vice and high quality drill bits. It might be possible to stop the pin spinning when drilling by poring Loctite retaining compound into the hole. You might need to wash the wd40 out first with alcohol to get the retaining compound to bond to the metal.
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