This manual covers the Komatsu WA300-1 and WA320-1 Wheel Loaders, applicable to serial numbers 10001 onwards. These machines are engineered for robust performance and reliability in demanding operational environments. Their design prioritizes durability and efficiency, making them a trusted choice for various heavy-duty applications. This comprehensive service manual provides detailed information essential for the maintenance, repair, and troubleshooting of your Komatsu wheel loader. It includes in-depth coverage of engine and drivetrain components, hydraulic systems, undercarriage, and attachments. With clear, illustrated instructions and exploded views, this guide is an indispensable resource for owners, technicians, and mechanics aiming to keep their equipment in optimal working condition.