I'd say it's time to replace it or get a new router. Sounds dangerous to me.
Here's a link to a parts diagram and list if that will help you out somehow...
Ryobi parts

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!