21260406
Accessory Drive Belt Tensioner
Mack

This tensioner maintains proper tension on the accessory drive belt, ensuring smooth operation of the belt-driven components such as the alternator, power steering pump, and air conditioning compressor. Its spring-loaded mechanism adjusts automatically to compensate for belt wear and elongation, preventing slippage and reducing noise. Proper tensioning extends belt life and enhances system efficiency, which is vital for maintaining engine performance and reliability. Regular inspection and replacement of the tensioner can prevent belt failure and associated engine issues. Source One Parts Center offers this critical component, supporting your maintenance routines and ensuring your truck’s accessory systems operate seamlessly under demanding conditions.