Belt tearing fracture reasons: 1, foreign body into the drive system. 2, liquid or oily substance contamination. 3, hurt by the other components of transmission system. 4, the tension too tight. 5, belt were broken before use. The solution: 1, remove the foreign body, check parts, if some parts was badly damaged need to change with belt. 2, to look for in the system and plug the leak point, change the belt. 3, check all the parts in the system at correct position, adjust the orientation of the parts after the replacement belt. 4, adjust and replace the belt tensioning force. 5, belt and make sure the belt replacement is not flex before use.