87GB45B
Accessory Drive Belt Tensioner Pulley
Mack

The accessory drive belt tensioner pulley is a vital component that maintains proper tension on the engine's accessory belts, ensuring smooth operation of alternators, power steering, and air conditioning systems. By keeping the belt tight and aligned, it prevents slipping and reduces wear on belt surfaces, which prolongs their lifespan. This pulley also absorbs vibrations and helps minimize noise, contributing to a quieter engine environment. Its precise design ensures consistent tension, even under fluctuating engine loads, which is crucial for optimal accessory performance. Easy to install and built for durability, this tensioner pulley is an essential part of maintaining engine efficiency. Source One Parts Center supplies this component, supporting reliable repairs and maintenance for heavy-duty trucks.