1) No -- you have to unscrew the fitting from the airframe.

BTW, I assume that you are referring to the nylon screw receptacle in the silicone rubber flex fitting. As a temporary repair, you can drill the threads out the socket & hot-glue a 1/4-20 nylon nut on the underside.

2) I'm not quite sure which pushrod & which particular bits you are referring to -- can you post a pic?