This workshop service repair manual covers forklifts, including models GPX 30, GPX 55, DPX 30, and DPX 55, along with their variants such as GPX 30, GPX 35, GPX 40, GPX 40S, GPX 50, GPX 55, DPX 30, DPX 35, DPX 40, DPX 40S, DPX 50, DPX 55, and GPX710U. These industrial vehicles are designed for material handling applications and are engineered to provide reliable performance in demanding environments. While specific production years are not detailed, the manual addresses a range of models with lift capacities typically between 3000 and 5500 lbs, reflecting their robust construction and operational capabilities. The purpose of this comprehensive English-language manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of these forklift models. It covers essential systems including the cooling, fuel, electrical, drive axle, braking, steering, and hydraulic systems, as well as uprights and counterweights. Owners, mechanics, and technicians will find step-by-step procedures, technical specifications, and service schedules within this document, enabling them to effectively maintain the operational integrity and longevity of their equipment.