This workshop manual covers the POWERSHIFT transmission technology for Hyster forklifts, including models S30FT, S35FT, S40FTS, H1.6FT, H1.8FT, H2.0FTS, S2.0-3.5FT, S40-70FT, S55FTS, H2.0-3.5FT, and H40-70FT, identified by internal codes such as [E010], [F001], [F187], and [L177]. These transmissions feature a wet multi-plate clutch and hydraulic shift control for forward and reverse gear selection, designed for robust performance in demanding industrial environments. While specific engine and dimension details vary by forklift model, the core POWERSHIFT transmission system is engineered for reliability and efficiency. This comprehensive English workshop manual provides essential information for the maintenance and repair of the Hyster POWERSHIFT transmission. It details diagnostic procedures, including the interpretation of comprehensive diagnostic codes, and outlines testing methods such as hydraulic pressure and electrical continuity testing. Owners and technicians will find guidance on crucial maintenance tasks, including the use of specialized POWERSHIFT fluid, though specific oil capacities and service intervals for fluid and filter changes must be referenced from the individual forklift's service schedule.