I have the Coleman rooftop Mach 3 AC model 6759C707. My blower motor died. I picked up a new motor and trying to install it. I removed the condenser fan from one shaft and pulled the panel to remove the other end from the plenum. The problem I am having is there is what looks like threads from a 3-4in bolt sticking up preventing me from pulling the "squirrel" cage end out of the unit. Has anyone had this problem and how did you get around it? I have not pulled the inside apart yet to see if I could access this bolt or whatever it is.

This bolt looks like it may be one of the mounting bolts. I will dig into it more and see if that is what it is.