This factory service repair workshop manual covers the Lombardini 1003 FOCS Engine Series, an internal combustion engine designed for reliable service and repair. The manual provides comprehensive guidance for maintaining and troubleshooting these engines, ensuring their optimal performance and longevity. This English-language manual offers detailed instructions, high-quality diagrams, and step-by-step procedures covering all essential aspects of engine service. It includes sections on general remarks and safety information, technical data, maintenance schedules, lubrication and cooling circuits, fuel and electrical systems, settings, storage, and special tools, making it an indispensable resource for owners, mechanics, and technicians.