This service repair manual covers the Hyster S40-60XL forklift, identified by model codes a/b/c187. Engineered for demanding industrial applications, this forklift series offers robust performance and reliability. It is equipped with various engine options, including GM, Mazda M4-121G, and Isuzu C240 (2.4L) engines, and features a Single-Speed PS Transmission (T41, T42, T43). The design prioritizes operational efficiency and durability, making it a trusted choice for material handling needs. This comprehensive manual provides detailed information essential for the maintenance and repair of your Hyster forklift. It includes step-by-step repair instructions, preventative maintenance procedures, and troubleshooting guides. Coverage extends to critical systems such as the cooling system, fuel system (LPG and gasoline carburetor), drive axle, steering, brakes, and hydraulic systems. Additionally, it details mast systems, electrical components, and features diagrams, photos, and illustrations to aid in understanding and servicing, ultimately helping to lower repair costs and ensure proper care.