Hi, John ~ I believe that Gary provided the correct model number and a link to a Popular Mechanics tool review. Meanwhile, I Googled the model number and found a manual, which I just now uploaded to our manual category
. Your yellow variable speed dial is pictured on page 20. But unfortunately it is not included in the parts list on page 21, which Sears indicates is part of the motor assembly that is serviceable only by a Sears repair center. It's possible that another member might have this part available from a "cannibalized" router.
Hope that this helps. Good luck on your repair.
Last edited by Web Shepherd; 12-02-2014 at 08:12 AM.