A4722020319
Idler Pulley Belt Tensioner HDEP EPA07/EPA10
Detroit Diesel

This belt tensioner idler pulley is an integral component of the engine’s accessory drive system, maintaining the correct tension on the serpentine belt. Its stainless steel construction ensures high resistance to corrosion and mechanical stress, translating into long-term durability. With a width of 42 mm and an outer diameter of 70 mm, this pulley is designed for precise tensioning and smooth belt operation. Proper tensioning minimizes belt slippage, reduces wear, and ensures efficient operation of engine accessories such as alternators, power steering, and air conditioning compressors. Its robust design and quality materials help prevent premature failure, which could lead to system downtime. Regular inspection and timely replacement of this pulley are key to maintaining optimal engine performance. Source One Parts Center offers this essential component to support the longevity and reliability of your vehicle’s drive system.