Disconnect the power cord from the electrical socket.
Turn off the water faucets connected to the washing machine. Disconnect the water inlet hoses from the back of the machine. Place the ends of the hoses in a bucket to collect any remaining water.
Slide the machine away from the wall so you can access the back.
Remove the screws around the edges of the rear service panel. Lift the panel off the washer cabinet.
Rotate the drive pulley by hand. Slide the drive belt off the pulley with the other hand. Pull the belt off the motor shaft.
Position the new belt around the motor shaft. Loop the other end around the large drive pulley.
Replace the rear service panel. Install the screws that hold the panel in place.