21141725
Accessory Drive Belt Idler Pulley
Mack

This idler pulley is an essential component of the accessory drive belt system, helping to maintain proper tension and alignment of the belt. Its role is crucial in ensuring the smooth operation of auxiliary systems such as the alternator, power steering, and air conditioning. Constructed for durability, it withstands the stresses of continuous operation and harsh engine conditions. Proper functioning of this pulley prevents belt slippage and reduces wear, thereby extending the lifespan of the belt and associated components. Easy to install, it is a vital part for maintaining engine efficiency and preventing unexpected breakdowns. For quality assurance and dependable performance, Source One Parts Center provides trusted replacement parts for your truck’s accessory drive system.