Just use non AC belt.
See my Cave, Serpent Belt
Many AC clutch pulley bearing are worn and cause serpent belt to fail. How fast depend how bad the bearing is because three pulleys are very close together.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)