This service repair manual covers the HYSTER CHALLENGER C001 (H25XL H30XL H35XL) and SPACESAVER B010 (S25XL S30XL S35XL) forklifts. These industrial machines are engineered for demanding operational environments, featuring robust construction and reliable performance. The forklifts are equipped with MAZDA M4-121G or ISUZU C240 (2.4L) engines, capable of running on LPG or gasoline, and utilize a Single-Speed PS Trans transmission. Their design emphasizes efficiency and durability for various material handling applications. This manual provides comprehensive information for the service and repair of these HYSTER forklifts. It details periodic and preventive maintenance procedures, along with technical specifications for key components such as the cooling system, fuel systems, drive and steering axles, brake system, hydraulic system, and electrical systems. Troubleshooting guidance and information on inch (SAE) and metric fasteners are also included, empowering owners and technicians to effectively maintain and repair the equipment.