The problem is, the old Colt action is extremely complicated, and has tiny working surfaces.
Each and every part does AT LEAST two totally different functions, and making a tiny change "here" can make something totally unexpected happen over "there".
Due to the complexity, no one can be much help on the internet, so I recommend buying the book "The Colt Double Action Revolvers: A Shop Manual, Volume One" by Jerry Kuhnhausen.
While this book covers the small and medium framed Colt's it also works for the larger New Service frame like the Model 1909.
This book is a real pistolsmiths training manual and covers EVERYTHING about the old Colt action.
Buy it from Brownell's, or Midway:
http://www.brownells.com/aspx/NS/st...805&title=Jerry Kuhnhausen SHOP MANUALS/BOOKS
I spent 30 years as a gunsmith specializing in Colt revolvers, and I AM NOT exaggerating about how complicated the old Colt action is.
Attempt repairs without knowing exactly what needs to be done and how to do it, and all you'll do is ruin parts that are NOT replaceable anymore.
The bolt especially is easy to botch up, and there are no more new bolts available.
Buy the book.
Also, if you're smart, you won't take it to a local gunsmith.
Today's gunsmiths also have no idea how the old Colt's work and they too botch repairs often.
If you don't want to tackle it yourself, send it to one of the few places that still know how to work on the Colt's.
I will recommend either Pittsburgh Handgun Headquarters in Pittsburgh, or Cylinder & Slide.