Hi, just did a search to try to find out info on my Craftsman Router Model 315.17390 and found your query. I know you have probably found what you were looking for (brushes replacements), but if you didn't, try the Ryobi help line at 1-800-323-4615. I was wondering though, would you happen to the the owner's manual for the router? Is there some way that I would be able to get a copy?

You MIGHT be in luck....

OldWoodWorkingMachines has manuals/PDF files for 315.17380 ....(also a 315.17480)

Usually numbers this close are SIMILAR Ryobi models........

http://www.owwm.com/MfgIndex/Publications.asp?ID=222#Routers

"...measure once.....cut twice....throw that one away and cut a new one...."

Thanks very much anyway... already tried that website. I saw the manual for 315.17980, but the router is completely different than my 315.17390 model. I will have to keep checking that site if I can't get one from another source.