This manual covers the CNH Industrial NEF FOUR CYLINDER MECHANICAL engine, part of the NEF Series, compliant with Tier 2 and Stage II emission standards. Engineered for reliability and performance, this four-cylinder mechanical engine with mechanical injection is designed for demanding applications. Its robust construction and efficient operation make it a dependable choice for various industrial and agricultural uses where consistent power and durability are paramount. This comprehensive Service and Repair Manual provides essential information for the maintenance, repair, and troubleshooting of your NEF engine. It includes easy-to-read text, top-quality diagrams, and highly detailed exploded pictures, offering all manufacturer specifications. Whether you are a do-it-yourself enthusiast or an experienced mechanic, this manual will guide you through all procedures, ensuring your engine remains in optimal working condition.