This workshop service repair manual covers the Iveco N Series engines, specifically the NEF family, including the N45 (4.5 Liters) and N67 (6.7 Liters) diesel variants. These engines are designed for applications such as G-DRIVE and agricultural use, adhering to the EU/2002/88/CE emission standard. The NEF series is recognized for its robust engineering and reliable performance in demanding operational environments. This comprehensive manual provides essential information for maintaining and repairing the Iveco N Series engines. It details general specifications, fuel system information, agricultural application specifics, overhaul procedures, technical data, recommended tools, and crucial safety prescriptions. The content is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their Iveco N Series diesel engines.