After successfully blowing out 22 inches of snow on my driveway this past week, my snow caster started making a racket and I found that the bearing on the backside idler pulley is toast. There was a bearing cover remaining with the number 6203 RS on it, which is a fairly common bearing. My question is does this bearing just press in? It appears so, but with all of the ball bearings gone it is kind of hard to see how it all went together. It appears that a thin race is still left in the pulley and there are no rivets to remove/replace with bolts as with the other idler pulley. Any thoughts? JohnB