Cummins C5317298 Idler Pulley Assembly

The C5317298 idler pulley is a critical component within the front gear train accessory drive system of Dongfeng Cummins 6CT, 6L, ISDe, and ISLe series diesel engines. It maintains serpentine belt tension and alignment for the fan, alternator, and compressor drives. The assembly features a high-strength steel housing with a permanently lubricated, sealed deep-groove ball bearing designed for high-temperature operating environments and extended service intervals. The pulley running surface is precision-machined to minimize belt wear and vibration. This part serves as a direct OEM replacement for Cummins part number C5317298 and is applicable across Dongfeng Motor Corporation heavy-duty truck platforms including Tianlong, Tianjin, Dali Shen, and Liuqi Longka series. It is engineered to meet original equipment specifications for fit, form, and function in heavy-duty commercial vehicle applications.