A4722020019
Fan Driven Idler Pulley
Detroit Diesel

This fan-driven idler pulley is designed to maintain proper tension on the fan belt, ensuring efficient power transmission from the engine to the cooling fan. Its precise construction and bearing integration allow for smooth rotation, reducing belt wear and preventing slippage. Proper tension provided by this pulley is critical for maintaining optimal fan operation, which directly impacts engine cooling efficiency. Made from durable materials, it withstands the high rotational speeds and thermal cycling typical in heavy-duty engine environments. Its robust design minimizes the risk of failure, contributing to the overall reliability of the engine’s accessory drive system. Regular inspection and replacement of this pulley ensure consistent fan belt tension, preventing overheating and extending component lifespan. Source One Parts Center supplies this vital part to support your engine cooling and accessory drive systems.