This workshop service repair manual covers the Lombardini 1003 FOCS Engine Series, designed for service and repair. The 1003 FOCS engine is a testament to robust engineering, built for reliability and efficient performance in demanding applications. This manual provides comprehensive information to ensure the optimal functioning and longevity of your engine. This English-language manual offers highly detailed factory service information, including hundreds of illustrations. It covers essential areas such as disassembly and assembly procedures, checks and overhaul, injection and electrical equipment systems, recommended oil types, refilling procedures, troubleshooting, safety instructions, and storage procedures. Technical data, characteristics, overall dimensions, and special tools are also detailed, making this an indispensable resource for owners, mechanics, and technicians.