My dad and I had no choice but to drill out the armature screw. Here's a couple of pics of the fan. And a new addition to my collection! Maybe a new fan and armature?
At this point, it would be best to find another non-working Royal with this armature. I am sure one of this board's other members can help you find one, though. Good luck!
Kirbyclassiciii, sounds good to me. Thank you. One thing, I found one on eBay and it's part number 1608001. It looks almost like mine. Will that work as well?
This armature (1-608001-000) will work with the existing field coil (1-801002-000), but only if you also use these following internal parts:
1-608261-000 driveshaft
1-608004-000 impeller fan (1/4" diameter shaft hole)