This manual covers the Komatsu WA90-5 and WA100M-5 Wheel Loaders, serial numbers WA90-5 50051 AND UP and WA100M-5 50051 AND UP. These machines are designed as robust construction equipment, built for demanding operational environments. Their engineering emphasizes reliability and efficiency, ensuring optimal performance in various applications. The top-quality diagrams and high-quality illustrations provided within this resource are integral to understanding the intricate components and systems of these powerful wheel loaders. This comprehensive shop and factory service manual is designed for repair and overhaul, fault finding, and efficiency improvement. It provides detailed step-by-step instructions, essential specifications and tolerances, and in-depth explanations of component functions. The English language manual, spanning 301 pages, serves as an indispensable tool for owners, mechanics, and technicians, enabling them to effectively maintain, diagnose, and repair their Komatsu WA90-5 and WA100M-5 wheel loaders, ensuring their continued operational readiness and longevity.