How do i change the Drive belt on toro lx 420?

To change the drive belt on a Toro LX 420, first, ensure the mower is turned off and disconnected from the power source. Remove the mower deck by releasing the retaining pins and disconnecting the belt from the engine pulley. Then, locate the drive belt, remove it from the pulleys, and replace it with the new belt, ensuring it is properly routed. Finally, reattach the mower deck and reconnect the power source before testing the mower.