The JCB 400Y6758 is a genuine green vented diesel fuel filler cap designed for a wide range of JCB agricultural, construction, and industrial machinery. This OEM cap ensures proper fuel tank ventilation, preventing vacuum or pressure buildup, and securely seals the diesel tank to prevent spillage and contamination. Its robust plastic construction provides durability and a precise fit for compatible JCB models including Backhoe Loaders, Loadalls, Fastracs, Excavators, and Wheeled Loaders.