Thanks for the tips guys.  I'll try them this weekend!

Hi, yes I do have the exploded diagram however there are no extension lines or screws to the shell.  I'm an engineer who knows how to read blueprints and drawings and I'm at a loss here.  My only guess is the shell is a snap fit.

I want to lube mine but can't seem to find the trick to removing the body.  I don't want to break any plastic.