This comprehensive service repair manual provides in-depth information for maintaining, assembling, disassembling, and servicing your Komatsu PC300-6, PC300LC-6, PC350-6, and PC350LC-6 hydraulic excavators. The manual covers a wide range of topics, including:

* **General Overview:** Get a thorough understanding of the machine's design, operation, and key components.
* **Structure and Function:** Explore detailed explanations of each system, including their individual functions and interactions within the overall machine.
* **Testing and Adjusting:** Learn how to perform accurate diagnostics and adjustments to ensure optimal performance.
* **Disassembly and Assembly:** Gain detailed instructions on taking apart and reassembling the excavator, with clear illustrations and step-by-step guidance.
* **Maintenance Standards:** Find complete maintenance schedules, recommended procedures, and specifications for keeping your excavator in top condition.
* **Troubleshooting Procedures:** Identify potential issues, understand their causes, and effectively resolve them using the provided troubleshooting guides.

This manual is designed to empower you to handle repairs and maintenance tasks efficiently, saving you time and money. The comprehensive content and detailed illustrations allow you to confidently diagnose and address any issues that arise. It's a valuable resource for both experienced mechanics and DIY enthusiasts.

The Komatsu PC300-6, PC300LC-6, PC350-6, and PC350LC-6 are powerful and versatile hydraulic excavators designed for a wide range of heavy-duty construction and earthmoving applications. These models, featuring serial numbers 30001 and up (PC300/350-6) and 10001 and up (PC300/350LC-6), represent the sixth generation of Komatsu's renowned PC300/350 series, known for their reliability, durability, and high performance. These excavators boast impressive digging forces, lifting capacities, and travel speeds, making them ideal for demanding projects such as road construction, infrastructure development, mining, and quarrying.

Komatsu has incorporated advanced technologies into these excavators to enhance operator comfort, efficiency, and safety. Features like the Komatsu EMMS (Engine and Machine Management System) provide real-time monitoring of key machine parameters, while the ECO Mode optimizes engine performance for fuel efficiency. The spacious and ergonomically designed cab offers a comfortable working environment with excellent visibility and intuitive controls. Safety is paramount, with features such as the Komatsu "Komtrax" satellite tracking system allowing for remote monitoring and machine management, ensuring operational efficiency and security. With their robust construction, advanced technology, and unwavering reliability, the Komatsu PC300-6, PC300LC-6, PC350-6, and PC350LC-6 excavators continue to be industry leaders, providing unparalleled performance and value for their operators.