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I tried to heat it with the tip of a soldering iron but it didn't move, another thing but if to peep and deflate the piggyback does not pierce and lose air?
Today I was trying to open it to do the overhaul, but the air shaft is totally blocked, it doesn't unscrew at all. I tried to take him to my trusted mechanic but he didn't succeed either. Do you have tips to unscrew it? Thanks