I don't know the actual machine but it could be jammed with calc. As you have some movement, I suggest you try turning each way, back & forth with a little pressure on the anti-clockwise turn. This could weaken and eventually break the calc bond.
If it is really jammed, often a 'shock' of a gentle hit with a hammer to break away the calc.
If & when you get the bits out, if they are coated with a 'gritty' calc coating, it can be removed by immersing in vinegar (mild acid) for a period of time.
If it is really jammed, often a 'shock' of a gentle hit with a hammer to break away the calc.
If & when you get the bits out, if they are coated with a 'gritty' calc coating, it can be removed by immersing in vinegar (mild acid) for a period of time.
