How do you replace the walking belt on a weslo cadence 920 treadmill?

To replace the walking belt on a Weslo Cadence 920 treadmill, first, unplug the machine for safety. Remove the motor cover by unscrewing any screws, then loosen the tension bolts on the rear roller to free the old belt. Slide the old belt off and place the new belt on the deck, ensuring it's properly aligned. Finally, re-tension the new belt as needed, reassemble the motor cover, and plug the treadmill back in.