The Hyster Challenger H135XL and H155XL forklifts represent robust industrial equipment designed for demanding material handling tasks. These forklifts are engineered for reliability and performance, featuring a range of engine options including GM V6 and Perkins diesel engines, and are equipped with LPG fuel systems. Their advanced design incorporates various mast types, hydraulic systems with gear and vane pumps, and sophisticated transmission options, ensuring efficient operation in diverse work environments. The commitment to quality in Hyster forklifts is evident in their durable construction and thoughtful engineering. This comprehensive Service Repair Manual and Parts Manual provides essential information for the repair, servicing, technical maintenance, and troubleshooting of Hyster Challenger H135XL and H155XL forklifts. It covers critical systems such as the engine, transmission, hydraulic system, and electrical components, detailing procedures for maintenance and repair. With detailed illustrations, exploded diagrams, and clear instructions, this manual is an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of their equipment.