This comprehensive service repair manual is your go-to resource for the Komatsu 125-3 Series diesel engine. It covers everything from general information to detailed repair procedures. The manual begins with an overview of the engine, including its specifications, assembly drawings, weight tables, and performance curves. You'll find an in-depth explanation of the engine's structure and function, along with detailed sections on its intake and exhaust systems, engine body, lubrication system, fuel system, cooling system, and electrical system. The manual also includes valuable information on testing and adjusting the engine. You'll have access to data charts, standard values for electrical parts, a list of testing tools, and step-by-step instructions for troubleshooting common problems. Dive into the disassembly and assembly processes with clear instructions and special tool lists for every step. The manual also features comprehensive repair and replacement procedures for critical components like the cylinder head and cylinder block. This manual is your complete resource for understanding, maintaining, and repairing your Komatsu 125-3 Series diesel engine.

The Komatsu 125-3 Series Diesel Engine is a robust and reliable power plant that finds application in a wide range of heavy-duty machinery, including excavators, loaders, bulldozers, and other construction equipment. Renowned for its durability and dependability, the 125-3 Series is known for its exceptional performance in demanding operating conditions. This engine series is characterized by its efficient fuel consumption, resulting in cost-effectiveness and reduced environmental impact. The 125-3 Series engines are designed for high torque output at low RPM, providing optimal power for heavy-duty applications. They also feature advanced engine management systems that optimize performance, fuel efficiency, and emissions. The Komatsu 125-3 Series Diesel Engine is powered by a powerful, fuel-efficient engine with a displacement ranging from 12.4 to 13.8 liters. These engines are typically equipped with turbochargers to enhance performance and fuel efficiency. The 125-3 Series engines also feature innovative technologies, such as electronic fuel injection systems and exhaust gas recirculation (EGR) systems, to minimize emissions and meet stringent environmental regulations. With a focus on operator comfort and ease of maintenance, the 125-3 Series engines are designed for long service life and minimal downtime. The engine's robust construction and high-quality components ensure reliability and longevity. The 125-3 Series is also known for its quiet operation, minimizing noise pollution and enhancing operator comfort.