AFTER ruining many pins and pulling out the threads from meny bells I invented a cure which almost always works. With a torch and an impac wrench a i/2 impac socket. Take a 1/2 allen wrench and hack off a short piece. Place the allen in the 1/2 socket and on the impac wrench. With the torch heat the bell up and down around the front where the pin is screwed into the bell hse. with one person with the wrench running in reverse the torch is applied. there is a special five seconds where the locktite is melted but before the heat comes from the bell hse has not transferred to the screw and re siesed
the pin, where the screw zips out. Don't force it if it does not work let it cool and retry. Force will take the threads of the bell out.
good luck Buddy