This comprehensive Operation & Maintenance Manual covers the Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 Hydraulic Excavators with serial numbers 32488 and up for the PC400-6/PC400LC-6 models, and 12629 and up for the PC450-6/PC450LC-6 models. It provides detailed instructions for operating, handling, lubricating, maintaining, checking, and adjusting these excavators, ensuring peak performance, economical operation, and safe usage.

The manual is structured to guide both operators and maintenance personnel. It covers a broad range of topics, starting with essential safety information and general precautions. A detailed explanation of the machine's components is provided, followed by comprehensive operational procedures, including transportation, cold weather operation, and long-term storage.

Furthermore, the manual delves into troubleshooting techniques to address potential issues. A dedicated section on maintenance includes guidance on service intervals, wear parts identification, and recommended fuel, coolant, and lubricant usage based on ambient temperatures. Standard tightening torques for bolts and nuts are outlined, and a periodic replacement schedule for safety-critical parts is presented.

The manual also includes a comprehensive maintenance schedule chart, outlining specific service procedures for each component. Detailed specifications are provided for reference, along with information on optional attachments and their handling. A section on extending machine service life and the operation of the auto-greasing system is included.

The Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 hydraulic excavators are powerful and versatile machines designed for a wide range of heavy-duty construction and demolition applications. These models, with serial numbers starting from 32488 and 12629 respectively, are renowned for their robust construction, high performance, and operator comfort. The PC400-6 and PC450-6 models offer standard configurations, while the PC400LC-6 and PC450LC-6 feature long undercarriage versions ideal for working in tight spaces or on uneven terrain. They are equipped with powerful Komatsu engines, providing ample power for digging, lifting, and loading heavy materials. The advanced hydraulic system ensures smooth and efficient operation, while the ergonomic operator cab enhances comfort and productivity.

The Komatsu PC400-6 and PC450-6 series excavators boast several innovative features that contribute to their exceptional performance and reliability. These include a reinforced boom and arm for increased durability, a large fuel tank for extended operation time, and a robust undercarriage with heavy-duty tracks for excellent stability and traction. The excavators also offer advanced safety features such as a comprehensive monitoring system, automatic shutdown functions, and an emergency stop button. The operator can easily adjust the machine's performance settings to suit the specific task at hand, ensuring optimal efficiency and fuel economy. The Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 excavators are designed to meet the demanding requirements of modern construction projects, delivering exceptional performance, durability, and operator comfort.