This comprehensive Operation & Maintenance Manual provides detailed instructions and guidance for the Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 Hydraulic Excavators, covering serial numbers 32250 and up for the PC400-6 and PC400LC-6 models, and 12144 and up for the PC450-6 and PC450LC-6 models. The manual is designed for both experienced operators and maintenance personnel, offering insights into safe and efficient operation and maintenance practices.

The manual covers a wide range of topics, including:

**Safety:** General safety precautions, operation safety measures, maintenance safety guidelines, and proper placement of safety labels.

**Operation:** A detailed overview of the excavator's components, comprehensive operating procedures, transportation guidelines, cold weather operation techniques, long-term storage instructions, and troubleshooting tips.

**Maintenance:** Practical guidance on maintenance routines, service outlines, wear parts identification, recommended fuel, coolant, and lubricant usage based on ambient temperature, standard tightening torques for bolts and nuts, periodic replacement schedules for safety-critical components, a comprehensive maintenance schedule chart, and detailed service procedures.

**Specifications:** A complete breakdown of the excavator's technical specifications.

**Options and Attachments:** Safety precautions for handling buckets with hooks, using seat belts, and operating the car heater. Instructions for preparing the machine for attachments, an introduction to various attachments, and tips for extending the machine's service life.

This manual serves as an invaluable resource for ensuring optimal performance, extending the life of your Komatsu excavator, and maintaining a safe operating environment.

## Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 Hydraulic Excavators: Power and Precision in Construction

The Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 hydraulic excavators represent the cutting edge of heavy construction machinery. These powerful machines, designed for demanding tasks like large-scale earthmoving, quarrying, and infrastructure projects, boast a robust build and advanced technological features. The PC400-6 and PC450-6 models are standard excavators, while the PC400LC-6 and PC450LC-6 are long-reach versions, offering greater reach and versatility for specific tasks.

All models feature powerful Komatsu SAA6D140E-6 engines, delivering exceptional performance and efficiency. The hydraulic system, featuring a sophisticated electronically controlled pump and optimized valve design, ensures smooth and precise operation. Operator comfort is a priority, with a spacious cab offering excellent visibility and ergonomic controls. Advanced safety features such as a robust ROPS/FOPS structure and a comprehensive monitoring system provide peace of mind during operation. These excavators are built to withstand even the toughest conditions, with durable components and robust construction. Their versatility, combined with Komatsu's renowned reliability and efficiency, makes them a top choice for construction professionals seeking to optimize productivity and minimize downtime.