This comprehensive Service Repair Manual provides detailed information on maintaining, assembling, disassembling, and servicing your Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 Hydraulic Excavators.

Covering models with serial numbers PC400-7 - 50001 and up, PC400LC-7 - 50001 and up, PC450-7 - 20001 and up, and PC450LC-7 - 20001 and up, equipped with the SAA6D125E-3 engine, this manual offers in-depth guidance on all aspects of your machine's operation.

Benefit from detailed specifications, clear diagrams, and real-life photo illustrations, enabling you to confidently perform repairs, diagnostics, servicing, technical maintenance, and troubleshooting procedures. This manual empowers you to understand the intricacies of your machine and tackle repairs effectively.

The manual is organized into sections covering:
- **General:** Introduces essential information and overviews.
- **Structure, Function, and Maintenance Standard:** Delves into the operational design, functionality, and recommended maintenance practices.
- **Testing and Adjusting:** Provides step-by-step instructions for testing and adjusting various components.
- **Disassembly and Assembly:** Offers detailed guidance on taking apart and reassembling major components.
- **Others:** Contains additional information and resources relevant to your machine.

Equipped with a wealth of knowledge and practical guidance, this manual serves as an invaluable resource for both experienced operators and those seeking to deepen their understanding of these powerful Komatsu excavators.

The Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 are heavy-duty hydraulic excavators renowned for their robust construction, powerful performance, and advanced technological features. These excavators are widely used in various demanding applications like construction, mining, demolition, and quarrying. The PC400-7 and PC450-7 models are standard excavators, while the PC400LC-7 and PC450LC-7 are long-reach models designed for greater working range. All models feature a powerful Komatsu SAA6D140E-3 engine, known for its efficient fuel consumption and low emissions. These excavators incorporate a hydraulic system designed for precise control and high lifting capacity, enabling them to handle heavy loads and perform intricate tasks with ease. Their durable components and robust construction provide exceptional reliability and longevity in demanding environments.

Equipped with a spacious and ergonomically designed cab, the Komatsu PC400-7 and PC450-7 series offer a comfortable and productive work environment for operators. The cab features a user-friendly control panel, adjustable seat, ample legroom, and excellent visibility, ensuring operator comfort and ease of operation. The excavators are also equipped with a range of safety features like a robust ROPS/FOPS cab structure, emergency stop buttons, and comprehensive safety systems, ensuring operator protection in hazardous working environments. The Komatsu PC400-7 and PC450-7 series boasts advanced technological features like Komatsu's EMMS (Equipment Management Monitoring System), which provides real-time performance monitoring, diagnostics, and maintenance scheduling, further enhancing the excavators' efficiency and uptime. These excavators are known for their versatility and adaptability, making them an ideal choice for various construction and earthmoving applications.