This service repair factory manual covers the Hyster B454 series forklifts, including the W25ZC, W30ZC, and W40ZC sub-models. These Class 3 Electric Motor Hand Trucks are designed for efficient material handling, featuring robust construction and reliable DC electric motor propulsion. The engineering quality of these vehicles ensures dependable performance in demanding industrial environments. Notable components include the Master Drive Unit, ZAPI controllers, and an industrial battery system, all contributing to the overall operational excellence and longevity of the Hyster B454. This comprehensive manual provides detailed information essential for the maintenance and repair of your Hyster forklift. It covers critical areas such as the electrical system, brakes, steering mechanism, and the walkie high lift hydraulic system, including tilt cylinders. Step-by-step instructions are provided for periodic maintenance and complex repairs, along with technical specifications, diagrams, and information on metric and SAE fasteners. This resource is invaluable for owners, mechanics, and technicians seeking to ensure optimal performance and extend the service life of their Hyster B454 equipment.