Step 1. Remove Breech Lock bushing in Station 4, where the index rod is being held in the tool head.
Step 2. Raise carrier and remove index rod.
Step 3. Remove old driver clutch from the bottom of the carrier, there is a slot positioned to the rear in the bottom cover for easy removal.
Step 4. Insert new driver clutch into the bottom cover on the under-side of the carrier.
Step 5. Install the index rod through the tool head, aligning the rod with the slot in the driver clutch.
Step 6. Lower carrier, rotate index rod to line up with the slot in the top of the tool head.
Step 7. Install Breech Lock bushing, a bushing is required to hold the index rod down, install one even if no reloading die is present.
If a visual representation is more helpful, our friends at Recarga Club produced a brief video depicting the process. Follow this link for the video: https://www.youtube.com/watch?v=rTB9fVxdpu0