This manual covers the Hyundai 35B-7, 40B-7, 45B-7, and 50B-7 forklift trucks, designed for material handling applications with lift capacities ranging from 3,500 to 5,000 kg. These models represent a generation of robust and reliable industrial equipment from Hyundai Heavy Industries, a leading global manufacturer. The engineering quality of these forklifts is evident in their comprehensive system coverage, which includes advanced power train, brake, steering, hydraulic, and electrical systems, along with detailed mast specifications. This manual provides the in-depth information necessary to understand, maintain, and repair these sophisticated machines, ensuring their continued operational efficiency and longevity. The purpose of this service repair manual is to provide comprehensive guidance for the maintenance and repair of the specified Hyundai forklift models. It covers all aspects from general information, including safety hints and specifications, to detailed procedures for the power train, brake, steering, hydraulic, electrical, and mast systems. The manual includes troubleshooting guides, disassembly and assembly instructions, operational checks, and adjustment procedures, offering advanced diagnostic and repair capabilities. This resource is invaluable for DIY mechanics, service technicians, and fleet managers seeking to perform everything from routine maintenance to complex overhauls, ensuring the optimal performance and safety of the equipment.