This comprehensive Komatsu PC400-7 and PC400LC-7 Hydraulic Excavator Service Repair Manual provides in-depth information for maintaining, assembling, disassembling, and servicing your Komatsu PC400-7 and PC400LC-7 Hydraulic Excavators. It covers models with serial numbers 50001 and above, including those equipped with the SAA6D125E-3 engine. For detailed engine information, refer to the 125-3 Series Engine Shop Manual. This manual offers a wealth of information to help you troubleshoot, diagnose, and repair your machine effectively.

The manual includes detailed specifications, diagrams, and real-photo illustrations that guide you through repair, maintenance, and troubleshooting procedures. With its clear and concise instructions, this manual empowers you to confidently tackle repairs and maintain your machine without relying on outside service. You'll find information on the following:

* **General Information:** Covers fundamental aspects of the machine.
* **Structure, Function, and Maintenance Standards:** Discusses the machine's design, operation, and proper maintenance practices.
* **Testing and Adjusting:** Provides step-by-step procedures for testing and adjusting various components.
* **Disassembly and Assembly:** Offers detailed instructions for taking apart and reassembling different parts of the excavator.
* **Supplement for Offset Boom Excavator:** Includes specific information for offset boom configurations.
* **Other Information:** Contains additional resources and supplementary information.

This manual is fully searchable and organized with bookmarks for easy navigation, making it easy to find the information you need.

The Komatsu PC400-7 and PC400LC-7 are powerful and versatile hydraulic excavators designed for demanding construction and heavy-duty applications. These machines boast a robust build, advanced hydraulic systems, and innovative technology, making them a popular choice for various projects. The PC400-7 and PC400LC-7 share a common platform, with the LC-7 variant showcasing a longer undercarriage and enhanced stability for demanding tasks. These excavators are powered by Komatsu's proven SAA6D140E-7 engine, delivering exceptional power and efficiency. The engine's high torque output and low fuel consumption contribute to productivity and cost-effectiveness. The Komatsu PC400-7 and PC400LC-7 feature an advanced hydraulic system that optimizes performance and fuel efficiency. The system includes a load-sensing pump and a variable displacement piston pump, ensuring precise control and smooth operation. The robust hydraulic components provide reliable performance and durability even in demanding conditions.

Further enhancing the user experience, the PC400-7 and PC400LC-7 leverage Komatsu's innovative technology. The Komatsu Traction Control (KTC) system automatically adjusts the track speed and engine power to ensure optimal performance in various terrain conditions. The excavators also feature a spacious and operator-friendly cab, designed for comfort and productivity. The cab is equipped with an ergonomically designed seat, a multi-function control panel, and a clear panoramic view of the work area. This allows operators to work comfortably for extended periods, minimizing fatigue and maximizing efficiency. The PC400-7 and PC400LC-7 are designed with safety as a priority. The machines incorporate various safety features, including a robust ROPS/FOPS cab structure, emergency stop buttons, and a comprehensive safety system that monitors critical functions, alerting the operator to potential hazards. This commitment to safety ensures the well-being of the operator and other personnel working in the vicinity of the machine.