OK. I'm stuck! I have been trying to remove the arms from the knearled end that goes into the cab for about 2 hours now. This is on a 51 3100. I think that all is original. There is a small spring wire loop that sticks out from under the arm cap. I have pulled one end out, but I can't remove the other end. Is this the lock? How do I take this apart? It can't be this hard. HELP!!
