The Komatsu WA380-6H is a robust wheel loader designed for demanding operational environments. Featuring a powerful Komatsu SAA6D107E-1 engine with a net power of 166 kW (223 hp) and a substantial bucket capacity of 3.3 m³ (4.3 cu yd), this machine is engineered for efficiency and reliability. Its advanced transmission with lock-up, coupled with a strong tractive effort of 176.5 kN (39,675 lb), ensures optimal performance in various material handling tasks. The WA380-6H is built to meet EPA Tier 3 and EU Stage IIIA emissions standards, reflecting a commitment to both power and environmental consideration. This model is intended for heavy-duty applications where durability and consistent output are paramount. This Service Repair Manual provides comprehensive guidance for the Komatsu WA380-6H, covering serial numbers H60051 and up. The manual details everything from basic specifications and structural components to in-depth maintenance procedures, testing, and adjustment protocols. It includes essential information on troubleshooting common issues, disassembly and assembly instructions, and standard value tables to ensure accurate repairs. With coverage extending from the front bumper to the rear, this English-language manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their WA380-6H wheel loader.