This service repair manual covers Hyster SPACESAVER S135XL and S155XL forklifts, designed for material handling, lifting, and warehousing operations. These robust machines are engineered for reliability and efficiency in demanding industrial environments. The manual provides comprehensive details on various engine options, including GM V6-4.3L and Perkins Diesel engines, alongside transmission types such as two-speed and three-speed manual systems. It also details critical components like hydraulic systems, fuel systems, electrical systems, and chassis components, ensuring a thorough understanding of the forklift's construction and capabilities. The purpose of this manual is to serve as an authoritative guide for owners, mechanics, and technicians. It details essential maintenance procedures, including periodic checks and fluid capacities, to prevent premature failure and optimize performance. Furthermore, the manual offers in-depth troubleshooting information and technical specifications for all covered systems, from the cooling and mast assemblies to engine control modules and brake systems. By following the procedures outlined within, users can effectively maintain, repair, and service their Hyster forklifts, ensuring continued operational efficiency and longevity.