Yes, thanks, everyone. I posted this same question over on SB, and Luis H. suggested I gently use needle-nose pliers--which I did. The resistance I originally felt (before I posted yesterday) was due to some old and thickened grease that was packed around the spring of the reserve mechanism. I decided to ask before I forced things and ruined anything.
Everything is apart, and clean (I used 409 since I was out of Simple Green), and now ready to be reassembled.