This Service Repair Manual provides comprehensive information for the Komatsu 170-3 Engine. As an internal combustion engine, it represents a significant component within its intended application, built with Komatsu's reputation for engineering quality and reliability. While specific production years are not detailed, this manual focuses on the core operational and maintenance aspects of this engine family, designed for demanding environments. The purpose of this manual is to serve as an authoritative guide for owners, mechanics, and technicians. It covers essential areas including general maintenance, periodic lubrication, troubleshooting procedures, and detailed repair instructions for various systems such as the engine, transmission, brakes, electrical systems, chassis components, and emission controls. With clear explanations and diagrams, this manual aims to ensure the proper upkeep and efficient operation of your Komatsu 170-3 Engine.