This manual covers the Hyundai 80D-9 Forklift Truck, a diesel-powered industrial machine designed for heavy-duty material handling. The '80' in its designation typically signifies an 8,000 lb lifting capacity, while 'D' indicates a diesel engine, and '9' denotes a specific generation or series update, suggesting enhancements in technology and performance. Hyundai's extensive experience in manufacturing industrial equipment ensures a foundation of reliability and engineering quality. This forklift is built to provide robust service in demanding environments, and this manual is designed to support its optimal operation and longevity. The purpose of this comprehensive Service Repair Manual is to provide detailed information for the complete maintenance, assembly, disassembly, and servicing of the Hyundai 80D-9 Forklift Truck. It covers critical systems including General Information, Power Train, Brake, Steering, Hydraulic, Electric, and Mast systems. Within these sections, you will find in-depth procedures for troubleshooting, component removal and installation, system adjustments, and operational checks, all supported by detailed illustrations, exploded diagrams, and real photo illustrations. This manual is an essential resource for owners, operators, and technicians, enabling them to efficiently diagnose issues, perform necessary repairs, and maintain the forklift, ultimately contributing to cost savings and extended equipment life.