This comprehensive service and repair manual covers the Komatsu D31S-16 and D31Q-16 Crawler Loaders, specifically for serial numbers 25001 and up. It's a valuable resource for technicians and mechanics working on these machines, providing detailed information to diagnose and resolve a wide range of issues. The manual offers in-depth coverage of all major components, including the engine, transmission, hydraulic systems, undercarriage, and electrical system. With detailed diagrams, clear instructions, and troubleshooting guides, this manual simplifies repair procedures and ensures efficient and effective maintenance. It's designed to help you understand the operation of these loaders, perform routine maintenance tasks, and troubleshoot problems quickly and accurately. You'll find detailed specifications, wiring diagrams, exploded views, and step-by-step procedures to guide you through repairs and adjustments.