This service repair workshop manual provides comprehensive information for the Hyster K177 (H45-50-55-60-65XM) Class 5 Internal Combustion Engine Truck, a pneumatic tire forklift. Engineered for reliability and performance, these forklifts are designed for demanding industrial applications. This manual covers forklifts equipped with internal combustion engines, including specific coverage for GM 2.2L, GM 3.0L, and Mazda M4-2.0G engine models, supporting both gasoline and LPG fuel systems. The Hyster K177 series represents a robust solution for material handling needs, built with quality components and advanced engineering for efficient operation. The purpose of this manual is to serve as a complete guide for the maintenance, repair, and troubleshooting of your Hyster forklift. It contains detailed instructions, diagrams, and specifications to assist owners, mechanics, and technicians. Key areas covered include engine disassembly and assembly, cooling system service, fuel system maintenance, electrical system components, hydraulic system operations, chassis and frame service, and brake system procedures. With clear, easy-to-read text and high-quality illustrations, this manual empowers users to perform necessary tasks, ensuring the longevity and optimal performance of their equipment while saving time and money.