This service repair workshop manual covers the Clark PWD 25, PWD 30, PWD 36, HWD 25, HWD 30, and HWD 36 forklifts. These industrial machines are engineered for demanding material handling operations, offering robust performance and reliability. This manual provides comprehensive information to ensure these forklifts operate at peak efficiency. The purpose of this manual is to assist owners, mechanics, and technicians in the maintenance, repair, and servicing of the specified Clark forklift models. It includes detailed procedures for planned maintenance, lubrication, electrical systems, control systems, drive systems, hydraulic systems, and lift systems. Additionally, troubleshooting guides, component checking, adjustments, and wiring schematics are provided to facilitate efficient diagnostics and repair.