Originally Posted by 586L-Frame

Here is the Breakdown Diagram
and the S&W Owner's Manual for the S&W 39.

586L-Frame

S&W 39 - Breakdown
http://stevespages.com/ipb-sandw-39.html

S&W Owner’s Manual for S&W 39
http://stevespages.com/pdf/s&w_39_59...539_559_52.pdf