This manual covers the SM648 CMP 40/45/50S, a versatile industrial vehicle powered by a Diesel Engine, model 25/26. Engineered for demanding operational environments, this equipment is designed for reliability and efficiency in various material handling applications. Its robust construction and thoughtful design contribute to its consistent performance and longevity in commercial and industrial settings. This comprehensive Service Repair Manual provides detailed guidance for the maintenance, repair, and troubleshooting of the SM648 CMP 40/45/50S. It includes essential information on engine service, cooling system maintenance, hydraulic systems, brake systems, and more, alongside specific troubleshooting procedures for common issues. With clear instructions and technical specifications, this manual serves as an indispensable resource for owners and service technicians to ensure optimal vehicle performance and safety.