The KATO HD820III Excavator, specifically the HD820III-LC variant for serial numbers 9379107 and up, represents a robust and reliable piece of heavy machinery. Engineered for demanding construction and excavation tasks, this hydraulic excavator is built with quality components, including a powerful Mitsubishi 6D34 turbocharged and intercooled, 4-cycle, water-cooled diesel engine with a 5.9L displacement. Its design prioritizes operational efficiency and durability, making it a trusted choice for professionals in the field. This Workshop Service Manual provides comprehensive repair and service information for the KATO HD820III Excavator. It is intended for both do-it-yourself enthusiasts and experienced mechanics, offering detailed, step-by-step instructions accompanied by pictures and diagrams for clarity. The manual covers a wide array of topics, including general information, technical specifications, tightening torques, special service tools, lubrication charts, engine unit details, and extensive sections on the hydraulic and electrical systems, ensuring thorough maintenance and repair capabilities.