87GB47A
Accessory Drive Belt Tensioner
Mack

This tensioner maintains proper tension on the accessory drive belt, ensuring efficient operation of engine accessories such as alternators, power steering, and air conditioning compressors. Its precise tensioning capability prevents belt slippage and reduces wear, which can lead to belt failure and potential engine damage. Designed for durability, it withstands the harsh conditions of heavy-duty engines, including high temperatures and vibrations. Proper tensioning is critical for maintaining accessory performance and preventing costly downtime. Easy to install and adjust, this component is vital for keeping your engine’s accessory systems running smoothly. Source One Parts Center offers this tensioner as a dependable replacement part to support your truck’s reliable operation.