This comprehensive Komatsu D51EX-22 and D51PX-22 Crawler Tractor Factory Service Repair Manual provides detailed technical information and step-by-step instructions for maintaining and repairing these powerful machines. It covers a wide range of topics including:

* **Engine:** Thorough coverage of the engine, including its components, operation, troubleshooting, and repair procedures. Detailed diagrams and illustrations enhance understanding.
* **Transmission:** Provides in-depth explanations of the transmission system, its functions, and methods for diagnosing and resolving transmission issues.
* **Hydraulic System:** Extensive information on the hydraulic system, covering its components, operation, troubleshooting techniques, and repair procedures.
* **Undercarriage:** Covers the undercarriage components, including tracks, rollers, sprockets, and idlers. It provides guidance on proper maintenance, inspection, and repair practices.
* **Electrical System:** Includes detailed diagrams and explanations of the electrical system, its components, diagnostics, and repair processes.
* **Operator's Manual:** Comprehensive information on the operation of the Komatsu D51EX-22 and D51PX-22 Crawler Tractors, covering safety procedures, operating instructions, and routine maintenance tasks.

This manual is an invaluable resource for mechanics, technicians, and owners who need to maintain and repair their Komatsu D51EX-22 and D51PX-22 Crawler Tractors. It is essential for ensuring proper operation, extending the lifespan of the equipment, and minimizing downtime. The manual covers serial numbers B10001 and up for the Komatsu D51EX-22 and includes detailed coverage of the Komatsu D51PX-22 as well.

## Komatsu D51EX-22 and D51PX-22: Power and Precision in Earthmoving

The Komatsu D51EX-22 and D51PX-22 are powerful crawler tractors, commonly known as dozers or bulldozers, designed for heavy-duty earthmoving applications. These machines are known for their reliability, efficiency, and operator comfort, making them popular choices for construction, mining, and forestry projects. The D51EX-22 and D51PX-22 share a similar design but differ in their engine and operating weight. The D51EX-22 utilizes a Komatsu SAA6D107E-3 engine, producing 154 horsepower, while the D51PX-22 features a Komatsu SAA6D107E-2 engine, generating 173 horsepower. This difference in power output translates to different operating weights, with the D51EX-22 weighing in at 19,500 kg and the D51PX-22 at 20,500 kg.

Both models boast a range of features that contribute to their performance and efficiency. They are equipped with durable steel undercarriage, including heavy-duty track chains and rollers, ensuring long-lasting operation in challenging environments. The hydrostatic transmission system provides smooth and responsive control, while the operator cab offers a comfortable and ergonomic workspace with excellent visibility. The D51EX-22 and D51PX-22 also incorporate various safety features, such as a ROPS/FOPS certified cab, emergency stop buttons, and a comprehensive warning system. These machines are capable of handling a variety of tasks, including grading, clearing, and pushing material, making them valuable assets for a wide range of construction projects. Their impressive power, durability, and operator-centric design solidify their reputation as reliable and efficient earthmoving equipment.