Originally Posted by irishrose
You need a pentrating oil if kerosene doesn't work. I think Kroil is a good one. Liquid Wrench is another. If you have to use WD-40, be sure to clean it all off. It's not good to leave on a machine. Saturate the area and let it set. Try to move it, repeat if necessary. Old oil can get very stubborn.
This works but add a light tap from a hammer and it will free up. I have run into the stubborn ones like that before and a good oiling and a little force is in order.
Billy