[k9uw]

The switch worked initially and produced a decisive "click" as it moved between positions.  Now, the shaft rotates a few degrees but it refuses to move into the "other" position.  I assume that it is stuck in the "on" position because the switch activates two dial lamps in the "on" position and those lamps are lit.  At least that is how I interpret the schematic, and that is how the switch functions on the 37-11.  

Your suggestions for freeing the switch are appreciated.  I'll give those ideas a try and will report back, perhaps with photos as well.

Odd - the images of the schematic inserted into my original post do not show up for me when I view my own post.  When replying, however, they show up.  Anyone know why that would be?  I've tried 3 different browsers and the inserted images did not appear in any of them.