The Komatsu WA420-3 Wheel Loader, designed for heavy-duty applications, exemplifies robust engineering and reliable performance. Featuring a powerful Komatsu SAA6D114E-2 diesel engine with a displacement of 11.04 L, it delivers impressive gross power of 179 kW (240 HP). Its advanced transmission system, the Komatsu Advanced Transmission with Lock-up Torque Converter (K-ATLS), offers four forward and four reverse gears for efficient operation. With an operating weight of 21200 kg and a rated operating load of 11000 kg, this machine is built for demanding tasks in construction, mining, and material handling.

This Workshop Service Repair Manual provides comprehensive guidance for the maintenance and repair of the Komatsu WA420-3 Wheel Loader, serial numbers WA420H20051 and up. It covers essential areas including detailed engine specifications, transmission information, critical fluid capacities, and physical dimensions. The manual includes procedures for routine servicing, troubleshooting common issues, and technical specifications necessary for optimal performance and longevity. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the continued reliability and efficiency of their equipment.