[shane45-1911]

Hmmm, I'm not exactly sure what you mean by "hanging up." When you dry-fire, the hammer falls to half cock only? Or when you cock the gun, you can't get the hammer past half cock?

 

[shane45-1911]

http://www.m1911.org/stripin1.htm

Here's a good link to disassembly.

It sounds like your sear spring is not adjusted properly. Specifically, the left hand leaf may be putting too much pressure on the sear.