This manual covers the Lombardini LDW FOCS Series engine, a robust and reliable power unit designed for demanding applications. Engineered for performance and durability, these engines are built to meet the rigorous standards expected in their intended service and repair roles. The comprehensive nature of this documentation reflects the quality and complexity of the Lombardini engineering, providing essential information for optimal operation and longevity. The purpose of this English-language Service Repair Workshop Manual is to provide detailed guidance for the maintenance, repair, and technical understanding of the LDW FOCS Series engines. It includes extensive sections on maintenance procedures, troubleshooting, engine disassembly and assembly, overhaul instructions, and technical specifications. Furthermore, it details injection and electrical equipment, special tools, storage instructions, and quick reference charts, ensuring that owners, mechanics, and technicians have all the necessary information to effectively service and maintain their Lombardini engines.