This comprehensive Komatsu PC340LC-7K and PC340NLC-7K Hydraulic Excavator Service Repair Manual provides in-depth information for maintaining, assembling, disassembling, and servicing your machine. It covers models with serial numbers K40001 and up, encompassing the PC340LC-7K and PC340NLC-7K models which are equipped with the SAA6D114E engine. For detailed engine information, refer to the 114 Series Engine Shop Manual.

This manual serves as a comprehensive guide, offering detailed specifications, diagrams, and real-photo illustrations to guide you through every step of repair, diagnosis, servicing, technical maintenance, and troubleshooting. The information presented within this manual empowers you to identify problems, understand repair procedures, and maintain your machine effectively.

The manual is organized into several sections:

* **General:** This section provides an overview of the machine and its components.
* **Structure, Function, and Maintenance Standard:** This section outlines the structure, function, and proper maintenance standards for the excavator.
* **Testing and Adjusting:** This section details procedures for testing and adjusting various components and systems.
* **Disassembly and Assembly:** This section provides step-by-step instructions for disassembling and reassembling components, ensuring proper procedures are followed.
* **Others:** This section may contain additional information relevant to the machine, such as troubleshooting guides or specific maintenance procedures.

This manual is a valuable resource for anyone seeking to maintain and repair their Komatsu PC340LC-7K or PC340NLC-7K Hydraulic Excavator.

## Komatsu PC340LC-7K and PC340NLC-7K: Powerful Excavators Built for Versatility

The Komatsu PC340LC-7K and PC340NLC-7K are robust hydraulic excavators designed for high-performance excavating and material handling in a variety of applications. These machines are built on a legacy of Komatsu engineering, renowned for its rugged durability and advanced technology. They boast a powerful Komatsu SAA6D107E-3 engine delivering high torque and fuel efficiency, making them suitable for demanding construction projects, quarrying, demolition, and heavy lifting tasks. The PC340LC-7K, with its longer track frames and broader track gauge, delivers superior stability and traction, ideal for demanding terrain and high-volume operations. On the other hand, the PC340NLC-7K, with its narrower track width and shorter track frames, provides greater maneuverability and access to confined spaces, making it suitable for urban construction and projects with limited space.

Both models leverage Komatsu's renowned hydraulic technology for optimal control and efficiency. The hydraulic system incorporates intelligent features like the Komatsu Hydraulic System (KHS) that optimizes hydraulic flow and pressure for enhanced performance and reduced fuel consumption. The robust undercarriage with heavy-duty components ensures long-term durability and reliable operation in harsh environments. The ergonomic operator cab is designed for operator comfort and productivity, featuring a spacious interior with intuitive controls, a large color LCD monitor displaying machine information, and a comprehensive safety system that includes a standard rearview camera, a load moment limiter, and a comprehensive warning system, ensuring operator safety and operational efficiency.