I am attaching pictures of two Lux power nozzles, one a PN-2 and the other a PN-4. One is noisy, and the other is having trouble powering the brush roll. I'd like to get them apart and possibly repair them, but so far have only been able to remove the metal piece. Can anyone instruct me on how to disassemble them further, so I can see what their problems are? Thanks.

