This Shop Manual provides comprehensive information for the Komatsu WA480-5 wheel loader, covering serial numbers 80001 and up, and also includes details for the WA470-5 model from serial number 70001 and up. Engineered for demanding operational environments, the WA480-5 is equipped with a powerful SAA6D125E-5 turbocharged, intercooled, direct injection engine producing 235 kW (315 HP) and a robust Komatsu Advanced Transmission with Lock-up. Its substantial operating weight of 25360 kg and impressive dimensions, including a length with bucket of 8445 mm and width over tires of 3020 mm, highlight its capacity for heavy-duty tasks. This machine is designed for reliability and efficiency in various construction and material handling applications. The purpose of this manual is to serve as an authoritative guide for the operation and maintenance of the specified Komatsu equipment. It details essential procedures, technical specifications, and troubleshooting guidance necessary for optimal performance and longevity. Key areas covered include engine and transmission specifications, lubrication requirements with specific capacities for engine oil (35 L), hydraulic tank oil (208 L), and transmission oil (33 L), as well as recommended service intervals for components like the engine oil filter (500 hours) and hydraulic oil filter (1000 hours). This resource is invaluable for owners, operators, and service technicians to ensure the vehicle remains in peak condition and adheres to Tier 3 / Stage IIIA emissions standards.