How to Diagnose a Bad Power Cord or Switch
This article outlines the basics of power tool and appliance electrical diagnosis. You can use a multimeter to test tool and appliance cords and switches, the two parts usually responsible for electri...
I just looked at the parts diagram for your saw, there was a couple choices based on serial number. From the one I looked at it looks like you need to take a small pick or pointed punch and start at the end of the retaining ring and pry it out. I would think a 90* pick would work best. I also looked at the screw you mentioned, there is a picture of it on the parts diagram and it looks like a machine screw and not self taping.
Try finding the parts diagrams for your saw on ereplacementparts and then click on the picture of the retaining ring and screw and you will be able to see better.
I have a Bosch cs10 circular saw model 0601672073. Can anyone guide me on replacing this Part? It looks simple but the spring has me worried a little. A step by step guide would be nice, but maybe asking a lot.