23550819
Fan Drive Belt Tensioner Assembly for S55 12L
Detroit Diesel

This fan drive belt tensioner assembly ensures the proper tension of the engine’s fan belt in the S55 12L engine. Its pulley, measuring 1.55 inches in width and 2.91 inches in diameter, is engineered to maintain consistent belt tension, reducing slippage and preventing premature belt failure. Proper tensioning is critical for efficient operation of auxiliary systems such as the alternator, water pump, and cooling fan, directly impacting engine performance and longevity. The assembly’s design accommodates thermal expansion and vibration, ensuring long-term reliability even under demanding operating conditions. Its installation helps optimize power transfer and reduces wear on belt-driven components, ultimately contributing to lower maintenance costs. Source One Parts Center supplies this tensioner assembly, emphasizing quality and precise fit to keep your engine running smoothly and efficiently.