Hi, burrhead and Walker,
Burrhead, that is OK advice for cleaning, but Walker has to pull the dime out if he is going to change the firing pin. The firing pin is held in the cocking piece by a cross pin, and this is where things get tricky.
Clamp the front of the firing pin in a vise. Then press the bolt sleeve forward and tap out the crosspin (this may take a second person). Try to keep something soft, like an old towel, back of the cocking piece in case the sleeve or cocking piece is released too quickly and tries to head for the dark corner. Of course the dime will drop and you will probably lose it, which is why I use a penny.
After replacing the firing pin and spring with the new ones, reinstall the bolt sleeve, the cocking piece and the pin. It is not easy, but not that bad once you get the hang of it.
I don't recommend clamping the cocking piece and letting the firing pin jump for the simple reason that that firing pin can go through a lot of your tender skin if it gets the chance.
Jim