This comprehensive manual provides detailed information on the Komatsu D39EX-21 and D39PX-21 bulldozers, covering both service repair and operation & maintenance aspects. You'll gain a thorough understanding of maintaining and servicing these machines, including detailed diagrams, troubleshooting guides, and step-by-step instructions for a wide range of components and systems. This manual is an essential resource for mechanics, operators, and anyone responsible for the upkeep and performance of these robust bulldozers.

The Komatsu D39EX-21 and D39PX-21 bulldozers are powerful and versatile machines designed for demanding earthmoving applications. These models are renowned for their robust construction, impressive performance, and exceptional operator comfort. The D39EX-21 and D39PX-21 are equipped with a powerful Komatsu SAA6D170E-3 engine, delivering high torque and horsepower, ensuring efficient operation in challenging conditions. Both models feature a durable undercarriage with a wide track gauge for excellent stability and traction, making them suitable for working on uneven terrain and in tight spaces. The spacious and ergonomic operator's cab provides a comfortable and productive working environment, featuring excellent visibility and intuitive controls.

The D39EX-21 and D39PX-21 bulldozers are renowned for their productivity and reliability. With a variety of blade options including straight, semi-U, and U blades, these machines can handle a diverse range of tasks including grading, clearing, and excavating. The D39EX-21 is designed for general earthmoving operations, while the D39PX-21 is specifically built for heavy-duty applications such as mining and quarrying. Both models feature a range of advanced features, such as the Komatsu EMMS (Engine Monitoring and Management System), which monitors engine performance and provides real-time diagnostics, while the Komatsu K-COMS (Komatsu Communication System) enables remote monitoring and fleet management. These features enhance operational efficiency, minimize downtime, and ensure optimal performance in demanding applications.