How do you replace the mower deck belt on your STX30?

To replace the mower deck belt on your STX30, first, ensure the mower is turned off and disconnect the battery for safety. Remove the mower deck by disengaging the lift and any pins or bolts holding it in place. Once the deck is off, release the old belt from the pulleys and install the new belt by threading it through the appropriate guides and pulleys. Finally, reattach the mower deck and reconnect the battery before testing the mower to ensure proper function.