By my understanding, the roller on the bolt was not removable except by grinding it off. It is pretty hard steel and you can't get to the retaining ring once it is installed. If it came off the bolt, the chance are pretty good that the bolt was damaged as a result. Get another bolt and roller or just a roller / retaining ring if you can be SURE that the bolt has not been damaged. Without seeing it, my guess is that you need another bolt.
- Ivan.
|