Finally got it apart!
Thanks for the pics!
I wanted to disassemble this piece to do two things:
1) Re-lube the cleaning selector thumbwheel and
2) See if I could make the full bag mechanism work.
Goal #1 done! Now it turns without wearing out your thumb.
Goal #2 - not sure how to test this.
I've cleaned all those pesky little tubes, making sure air flows through well and also made sure the little vacuum doo-dad that would trip the latch has good suction.
However, after attempting to simulate a bag full scenario, I have not been able to see the plunger move at all. Any ideas as how to correctly simulate a bag full scenario (without actually having a totally full bag lying around)?
Or, any way to verify that the mechanism is still in working order?
Bill