1. Loosen the adjustment clamp bolt. This will make removal of the non-disc side easier.
2. Take a long punch, wooden dowl, or similar item, and insert it through either end of the axle.
3. With the tool, press on the inner lip of the insert while holding the shell. The insert should pop out.
4. Repeat for the opposite side.
1. Prep the insert and axle by rubbing anti-seize, or assembly lube on the axle/insert interface.
2. Press the insert into the axle.