1. Turn off the power and unplug the sander.
2. Locate the belt cover. It is usually secured with screws or a snap-on mechanism.
3. Remove the belt cover to expose the belt and pulleys.
4. Loosen the tensioning screw or knob until the belt is loose enough to remove.
5. Slip the old belt off the pulleys and remove it from the sander.
6. Place the new belt around the pulleys, making sure that it is properly seated in the grooves.
7. Tighten the tensioning screw or knob until the belt is taut.
8. Replace the belt cover and secure it in place.
9. Plug in the sander and turn on the power.
