This manual covers the HYSTER CHALLENGER H1050EH, H800E, H880E, and H970E forklifts, generation D117. These industrial machines are engineered for demanding operational environments, offering robust performance and reliability. Their design prioritizes efficiency and durability for a wide range of material handling tasks. This comprehensive Service Repair and Parts Manual provides essential information for the repair, servicing, technical maintenance, and troubleshooting of your HYSTER forklift. It includes detailed procedures for various systems, such as the cooling system, four-speed PS transmission, differential, steering and drive axles, braking systems, and hydraulic systems. Additionally, it contains parts information with illustrations and part numbers, offering step-by-step instructions and diagrams to guide users through correct and efficient repair and maintenance processes.