The Komatsu WA1200-3 Wheel Loader represents a robust piece of heavy machinery, engineered for demanding industrial applications. This model series is known for its substantial operating weight, powerful diesel engine, and advanced powershift transmission, designed to deliver exceptional performance and reliability in challenging environments. Its considerable dimensions and significant power output make it suitable for large-scale material handling operations, construction, and mining. The WA1200-3 embodies Komatsu's commitment to durable construction and efficient operation, positioning it as a key asset for any large-scale project requiring superior loading capabilities. This Workshop Service Manual provides comprehensive guidance for the repair and maintenance of the Komatsu WA1200-3 Wheel Loader series. It covers essential technical specifications, detailed maintenance procedures, and troubleshooting information to ensure the optimal performance and longevity of your equipment. Within these pages, you will find critical data on engine oil, hydraulic oil, and cooling system capacities, along with recommended service intervals and fluid types. This manual is an indispensable resource for owners, technicians, and mechanics seeking to perform effective upkeep and repairs, ensuring the WA1200-3 operates at peak efficiency.