This manual covers the N04C engine, a robust and reliable power unit designed for a variety of demanding applications. Known for its efficient performance and durable construction, the N04C engine embodies a commitment to engineering excellence and operational longevity. This factory workshop manual provides comprehensive guidance for the maintenance, repair, and servicing of this sophisticated engine, ensuring optimal performance and extended service life. The purpose of this manual is to serve as an authoritative resource for technicians and owners alike. It details essential procedures, including general specifications, troubleshooting guides, detailed engine overhaul steps, and specific instructions for the fuel, cooling, lubrication, starting, charging, and turbocharger systems. By following the systematic procedures and technical data contained herein, users can effectively diagnose issues, perform routine maintenance, and execute complex repairs, thereby preserving the integrity and functionality of the N04C engine.