This comprehensive manual provides detailed instructions for maintaining, assembling, disassembling, and servicing your Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 hydraulic excavators. It covers models with serial numbers starting from 50001 for PC400-7 and PC400LC-7, and 20001 for PC450-7 and PC450LC-7, all equipped with the SAA6D125E-3 engine. For engine-specific information, refer to the 125-3 Series Engine Shop Manual.

The service repair manual offers comprehensive information and data, including specifications, diagrams, and real photographs, guiding you step-by-step through repair, servicing, technical maintenance, and troubleshooting procedures. You'll find everything you need to effectively diagnose and repair your machine.

The operation and maintenance manual provides detailed procedures for operating, handling, lubricating, maintaining, checking, and adjusting your excavator. This comprehensive guide helps operators and maintenance personnel achieve peak performance, ensuring safe, economical, and efficient operation.

The service repair manual includes sections covering general information, structure and function, maintenance standards, testing and adjusting, disassembly and assembly, and other related topics. The operation and maintenance manual is organized into sections on foreword, safety, operation, maintenance, specifications, attachments and options, and an index for easy reference.

The Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 are powerful hydraulic excavators designed for heavy-duty construction and earthmoving applications. These machines are renowned for their robust construction, advanced technology, and exceptional performance. The PC400 series features a powerful engine, a durable undercarriage, and a hydraulic system that provides precise control and high digging forces. The PC400LC-7 and PC450LC-7 models incorporate a long reach boom, extending their working range and enhancing their ability to reach difficult areas. These excavators boast a spacious and ergonomically designed cab, offering the operator a comfortable and efficient working environment. The operator enjoys a commanding view of the work area through large windows, and the advanced control system allows for intuitive operation.

These Komatsu excavators are equipped with a comprehensive suite of features designed to enhance safety, productivity, and efficiency. The integrated monitoring system provides real-time data on machine performance and alerts the operator to potential issues. The excavators also feature advanced safety features, such as a ROPS/FOPS certified cab, an emergency stop system, and a comprehensive safety warning system. These safety features ensure a secure working environment for the operator and those working around the machine. The PC400-7, PC400LC-7, PC450-7, and PC450LC-7 are highly versatile machines that can be equipped with a range of attachments, including buckets, breakers, and rippers, to handle a variety of tasks, including digging, loading, demolition, and material handling. Their impressive power, durability, and advanced features make them ideal for large-scale construction projects, mining operations, and infrastructure development.