This workshop service manual covers CLARK GPH50, GPH60, GPH70, GPH75, DPH50, DPH60, DPH70, and DPH75 models. These industrial forklifts are engineered for demanding operational environments, offering robust performance and reliability. The manual provides comprehensive information for these models, which are equipped with various engine options including Perkins 4.248 Diesel, Ford CSG-649 Petrol/LPG, and GM 3-53N Detroit Diesel, catering to diverse power requirements and applications. This manual serves as an essential resource for maintaining and repairing CLARK forklifts. It details complete disassembly procedures, step-by-step instructions with detailed illustrations and diagrams, and troubleshooting guidance. Coverage includes critical systems such as hydraulics, steering, electrical, and fuel systems, along with service schedules and lubrication charts. This document is designed for both DIY enthusiasts and experienced mechanics, ensuring proper upkeep and operational longevity of the equipment.