This workshop repair manual covers the Komatsu WA400-1 wheel loader, designed for robust performance in various heavy-duty applications. Built with Komatsu's renowned engineering for reliability and efficiency, this model features a powerful Cummins NT855-C diesel engine, a versatile powershift transmission with 4 forward and 4 reverse gears, and a 4WD drive system. Its substantial operating weight and significant bucket capacity make it ideal for demanding tasks in construction, mining, and material handling. The WA400-1 series, applicable to serial numbers 10001 and on, represents a commitment to durable and productive heavy equipment.

This comprehensive English-language shop manual provides essential information for the maintenance and repair of the Komatsu WA400-1. It details critical procedures, technical specifications, and troubleshooting guidance necessary for optimal performance and longevity. Owners, technicians, and mechanics will find detailed instructions on engine and hydraulic systems, drivetrain components, and lubrication requirements, including capacities for engine oil and hydraulic fluid. Adherence to the service intervals and procedures outlined within this manual is crucial for ensuring the continued reliability and operational efficiency of your WA400-1 wheel loader.