This comprehensive Operation & Maintenance Manual is specifically designed for the Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 Hydraulic Excavators. It covers models with serial numbers 50288 and up for the PC400-7 and PC400LC-7, and 20235 and up for the PC450-7 and PC450LC-7. This manual provides detailed instructions and guidance for operating, handling, lubricating, maintaining, checking, and adjusting your Komatsu excavator, ensuring optimal performance, economy, and safety.

The manual begins with a Foreword, followed by crucial Safety Information, including safety labels and instructions for both machine operation and maintenance. It then introduces the excavator, providing product information and detailed illustrations of the machine's views, controls, and gauges. The manual covers various operational aspects, from basic controls and machine operation to transportation, cold weather operation, and long-term storage. It also includes a comprehensive section focusing on troubleshooting and recommended actions for common issues.

The manual delves into detailed maintenance procedures, outlining service intervals, wear parts identification, lubricant, fuel, and coolant specifications, as well as tightening torque specifications. It further highlights safety critical parts and provides a comprehensive maintenance schedule, along with step-by-step maintenance procedures.

The final sections of the manual include complete specifications for the excavator, attachment options, and a guide for recommended attachment operations. Lastly, the manual features an index to help you quickly locate specific information.

The Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 hydraulic excavators are powerful and versatile machines designed for demanding construction and earthmoving applications. These models, with serial numbers 50288 and up for the PC400/PC400LC series and 20235 and up for the PC450/PC450LC series, represent the latest generation of Komatsu's renowned excavators. They are known for their robust construction, advanced technology, and operator comfort, making them a popular choice for a wide range of projects.

The PC400-7 and PC450-7 models are standard configuration excavators, while the PC400LC-7 and PC450LC-7 models feature a long undercarriage for increased reach and stability. These machines are equipped with powerful Komatsu engines, providing exceptional power and torque for heavy lifting and digging tasks. The hydraulic system is designed for efficiency and precision, offering smooth and responsive control for precise operation. The excavators also feature advanced technology, including a Komatsu EMMS (Equipment Management Monitoring System) for monitoring machine performance and diagnostics, and an optional Komatsu iMC (intelligent Machine Control) system for automated digging and grading. These features contribute to enhanced productivity and efficiency, while minimizing operator fatigue. Additionally, the excavators are equipped with a spacious and comfortable cab providing excellent visibility and operator comfort, further enhancing productivity and operator well-being.