This manual covers the HYSTER H135XL and H155XL forklifts, designed for lifting and moving materials. These robust machines are engineered for reliability and efficiency, featuring EPA compliant engines with options including the GM V6-4.3L, Perkins Diesel 1104 (RE), and GM 3.0L. They utilize electronic controlled LPG/gasoline fuel injection systems and a two-speed power shift transmission, making them suitable for demanding industrial environments. This comprehensive Service Repair and Parts Manual provides detailed information essential for maintaining and repairing your HYSTER forklift. It includes step-by-step repair and servicing procedures, technical maintenance guidance, and troubleshooting steps for all major systems such as the engine, cooling system, fuel system, transmission, brakes, and hydraulic system. With clear diagrams, illustrations, and exploded views, this manual is an indispensable resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the equipment.