A4722020519
Idler Pulley for Fan Drive
Detroit Diesel

This fan-driven idler pulley is designed to work in conjunction with the engine’s fan belt system, ensuring proper tension and alignment. Its construction is optimized for high-speed rotation and thermal endurance, helping to prevent belt slippage or misalignment that could compromise cooling or accessory operation. The pulley’s design emphasizes durability, with materials chosen to withstand vibration and heat cycles common in heavy-duty engine environments. Proper tensioning provided by this pulley is essential for the efficient operation of the cooling fan and other belt-driven accessories, directly influencing engine temperature regulation and overall performance. Routine inspection and replacement are recommended to maintain system integrity. For a dependable, long-lasting solution, Source One Parts Center offers this high-quality pulley to keep your engine running smoothly under demanding conditions.