This Service Repair Workshop Manual provides comprehensive information for the Clark PWD 30-40SE and HWD 30-40SE models, including the PWD 567 and HWD 567 series. These electric-powered trucks are designed for material handling applications, offering robust construction and reliable performance. While specific production years are not detailed, the engineering quality inherent in the Clark brand ensures durability and operational efficiency for demanding industrial environments. This manual serves as an essential resource for maintaining and repairing your Clark PWD/HWD 30-40SE truck. It covers critical areas such as periodic service, electrical system components including the battery, wiring diagrams, electric motor, and line contactor, as well as powertrain elements like the drive unit and brakes. Additionally, information on control systems, the hydraulic system, caster assembly, and body and frame maintenance is included. Detailed truck specifications and troubleshooting guidance are also provided, empowering owners and technicians to perform necessary upkeep and ensure optimal vehicle function, saving time and money through self-service.