This shop manual provides comprehensive service and repair instructions for the KOMATSU 140-3 Series diesel engines. It includes detailed procedures for diagnosing, troubleshooting, and repairing various engine components, such as the fuel system, cooling system, lubrication system, and electrical components. The manual offers step-by-step guidance for disassembly, inspection, and reassembly, along with technical specifications and maintenance schedules. This document is essential for technicians and mechanics to ensure proper maintenance, repair, and optimal performance of the KOMATSU 140-3 Series diesel engines.