Turn off the lathe and unplug it from the electrical outlet.
Locate the access door on the left end of the lathe where the control panel mounts. Rotate the handle on the door counterclockwise until you can swing open the door.
Locate the idler pulley mounted onto a metal plate with a spring connected to it. The idler pulley maintains tension on the belt.
Pull the belt off the pulleys while you push the idler pulley inward to release tension on the belt. Let go of the idler pulley once you remove the belt.
Place the belt onto all of the pulleys except for the idler pulley. You will see a belt routing guide on the inside of the door. Use it to help you route the belt around the pulleys.
Push in on the idler pulley and place the belt over the pulley. Slowly let go of the idler pulley.
Close the door and tighten the handle clockwise to lock the door in place. Plug in the lathe, turn it on and check for proper operation.