This manual covers the Hyundai 35DS/40DS/45DS/50DA-7E Forklift Truck series, designed for robust material handling in industrial environments. These diesel-powered forklifts, with nominal lift capacities ranging from 3,500 kg to 5,000 kg, represent a generation of Hyundai's commitment to durable engineering and reliable performance. The -7E designation signifies advancements in design and technology, building upon Hyundai's established reputation for producing dependable heavy equipment. This factory service repair workshop manual provides comprehensive information for maintaining and repairing these essential industrial machines. The purpose of this manual is to serve as a definitive guide for professional mechanics, service technicians, fleet managers, and experienced DIY enthusiasts. It offers factory-level accuracy and detail, covering all major systems including the Power Train, Brake, Steering, Hydraulic, Electric, and Mast. Within these sections, you will find detailed procedures for general information, structure and operation, troubleshooting, disassembly and assembly, operational checks, adjustments, and component removal and installation. This comprehensive documentation, presented in English and suitable for printing, is designed to facilitate efficient and accurate maintenance and repair, ensuring the continued safe and optimal operation of your Hyundai forklift.