This manual covers the Lombardini CHD series engines, designed for robust performance and reliability. These engines are engineered for demanding applications, offering exceptional durability and efficiency. Their advanced design incorporates key systems such as the turbocharger, lubrication, cooling, fuel, and electric systems, ensuring optimal operation across various conditions. This comprehensive approach to engine building makes the CHD series a trusted choice for those who require dependable power. The purpose of this Service Repair Workshop Manual is to provide detailed guidance for the service and repair of the Lombardini CHD series engines. It encompasses essential information on engine systems, including disassembly, reassembly, and storage procedures. Maintenance coverage includes prescribed lubricant refilling and general maintenance practices. Furthermore, the manual details important technical information, settings, torque specifications, and the use of special tools, all presented in English to assist owners, mechanics, and technicians in maintaining these engines to the highest standards.