Well,if it is not too bad off and just stuck I would spray it with some rust penetrant and let it sit for a day. Then GENTLY tap on one side and the other alternately.Work(twist) it back and forth as it would in normal operation.Do not force it but be firm yet gentle.If it does not start to move ,gently tap it side to side again.It will work loose if it is not too badly rusted as some I have seen.


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!