This comprehensive manual provides a detailed guide for maintaining and repairing Komatsu D61EX-12 and D61PX-12 bulldozers. It encompasses both service repair and operation & maintenance information for these models, covering serial numbers 1001 and up (B1001 and up). This manual is your essential resource for understanding the intricate workings of these powerful machines, enabling you to perform a wide range of tasks, from routine maintenance to complex repairs. It covers everything from engine diagnostics and hydraulic system troubleshooting to blade adjustments and undercarriage maintenance, ensuring you have the knowledge you need to keep your Komatsu bulldozer operating at peak performance.

The Komatsu D61EX-12 and D61PX-12 bulldozers are powerful machines designed for demanding earthmoving tasks. They boast a robust construction, featuring a durable undercarriage designed for long life and high productivity. Both models are equipped with a powerful Komatsu SAA6D107E-3 engine, known for its efficiency and reliability. This engine delivers impressive power and torque while minimizing fuel consumption, contributing to overall operational efficiency. The D61EX-12 is a standard blade bulldozer, while the D61PX-12 features a parallel blade configuration, offering enhanced maneuverability and precision for tasks requiring precise earth movement. Both models are equipped with a spacious operator cab featuring a comprehensive instrument panel and ergonomic controls, maximizing operator comfort and productivity.

Beyond its robust design and powerful engine, the Komatsu D61EX-12 and D61PX-12 bulldozers are equipped with several advanced features that enhance their performance and efficiency. These include a hydraulically controlled transmission offering smooth and responsive shifting for optimal performance in various working conditions. Additionally, both models feature a hydraulic system designed for precise control of the blade and other implements. This system ensures optimal responsiveness and accuracy in various earthmoving tasks. Safety is paramount in these machines. Features such as the ROPS/FOPS operator cab, an automatic fire suppression system, and various safety interlocks contribute to a secure working environment for the operator. These bulldozers are an essential tool for various construction, mining, and other heavy industries, facilitating efficient and reliable earthmoving operations.