ROGER1 posted:Make sure the insulator is present just above the collector assembly and that the collector plate is not touching the frame. Also, make sure the fiber washer is present under the screw and solder lug that holds down the grounding spring (as well as attaching to the collector(.
Roger
The insulator is there. I even went so far as to put a piece of electrical tape under it to make sure the collector wasn't grounding out. The fiber washer is there as well.