The Hyster CHALLENGER H25XM, H30XM, H35XM, H40XM, H40XMS, S25XM, S30XM, S35XM, and S40XMS forklifts are robust machines designed for efficient material handling. These forklifts are powered by internal combustion engines, offering options for gasoline, LPG, or diesel fuel, and feature advanced components such as a Single-Speed Power Shift (PS) Transmission and a ROSS HGF steering control unit. Their engineering prioritizes reliability and performance in demanding operational environments, making them a dependable choice for various industrial applications. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of your Hyster forklift. It covers essential areas including detailed procedures for the frame, engine systems (Mazda M4-2.0G and M4-2.5D), cooling, fuel, and hydraulic systems, as well as the transmission, drive axle, steering, and brake systems. Additionally, the manual includes information on electrical systems, mast repair, periodic maintenance schedules, fastener specifications, and system capacities, ensuring that owners and technicians have the necessary resources to keep the equipment in optimal working condition.