This manual covers the Komatsu WA270-3 and WA270PT-3 3 Series loaders. These machines are engineered for robust performance and reliability in demanding operational environments. Their design prioritizes efficiency and durability, making them a dependable choice for various heavy-duty applications. The 3 Series represents an evolution in Komatsu's loader technology, focusing on operator comfort and operational effectiveness. This comprehensive Service Repair Manual in English provides detailed information for the repair, servicing, and preventative maintenance of the Komatsu WA270-3 / WA270PT-3. It includes step-by-step instructions, numerous photos, illustrations, and exploded diagrams to guide users through complex procedures. The manual also features troubleshooting sections, important notes, cautions, and warnings to ensure safe and effective maintenance. Its scope covers a wide range of components, including engine internals, powertrain, undercarriage, work equipment, hydraulic systems, seals, and electrical parts, making it an essential resource for owners, mechanics, and technicians.