first take a mental pic of the way the belt goes, there's a spring loaded tensioner. should have a bolt either a 15mm or a 13mm wrench will work. or in the top it might have a square to put a ratchet in it to move it. what ever it uses, pry on it till the belt comes lose, than slide it off the pulley. be careful not to release the wrench, the spring will snap back and you will get cut or your finger caught on a pulley if it does.