This comprehensive Komatsu Hydraulic Excavator Service Repair Manual and Operation & Maintenance Manual covers the Komatsu PC300-5, PC300LC-5, PC300LC-5K, PC300-5 MIGHTY, PC300LC-5 MIGHTY, PC300HD-5, PC400-5, PC400LC-5, PC400-5 MIGHTY, PC400LC-5 MIGHTY, and PC400HD-5 models. This manual is a valuable resource for anyone who needs to maintain, repair, or operate these excavators.

The Service Repair Manual provides detailed instructions on disassembly, assembly, and servicing procedures for all components of the excavator. It includes specifications, diagrams, and actual real-life photos and illustrations, guiding you through each step of the repair process. This information will enable you to identify and troubleshoot problems and understand how to repair and maintain your machine, saving you from relying on external service.

The Operation & Maintenance Manual outlines operation, handling, lubrication, maintenance, checking, and adjustment procedures. This manual is designed to help operators and maintenance personnel achieve peak performance through effective, economical, and safe machine operation and maintenance.

The manual covers all aspects of operation and maintenance, including:

- **Safety:** General precautions, precautions during operation, precautions for maintenance, and positions for attaching safety labels.
- **General View:** A detailed overview of the excavator's components and their functions.
- **Explanation of Components:** Comprehensive descriptions of each component, including its purpose and operation.
- **Operation:** Detailed guidance on how to operate the excavator safely and efficiently, including transportation, cold weather operation, and long-term storage.
- **Troubleshooting:** A comprehensive guide to diagnosing and resolving common problems and troubleshooting procedures.
- **Maintenance:** Guidance on regular maintenance schedules, wear parts lists, use of fuel, coolant, and lubricants, standard tightening torques for bolts and nuts, periodic replacement of safety-critical parts, and detailed service procedures.
- **Specifications:** Complete technical specifications for the excavator.
- **Options and Attachments:** Instructions on handling buckets with hooks, using seat belts, handling car coolers, handling air conditioners, operating attachments, and extending machine service life.
- **Loading Shovel:** Specific instructions for operating and maintaining the loading shovel, including general locations, instruments and controls, precautions for machine operation, maintenance, transportation, and specifications.

This manual is fully searchable and easy to navigate, ensuring you can quickly find the information you need. With the information contained within this manual, you can perform repairs and maintenance yourself, saving you time and money.

The Komatsu PC300-5 series, encompassing models like the PC300LC-5, PC300LC-5K, PC300-5 MIGHTY, PC300LC-5 MIGHTY, and PC300HD-5, is a renowned line of hydraulic excavators manufactured by Komatsu, a leading global construction equipment company. These excavators are known for their robust construction, powerful performance, and reliable operation, making them ideal for a wide range of heavy-duty applications including earthmoving, excavation, demolition, and material handling. The PC300-5 series boasts a range of engine options, including the powerful Komatsu SAA6D107E-3 engine, ensuring efficient operation and low fuel consumption. These excavators also feature a hydraulic system optimized for high digging forces and smooth, precise movements, further enhancing their performance and operator comfort.

Furthermore, the PC300-5 series is equipped with advanced safety features such as a robust ROPS/FOPS cab, operator-friendly controls, and a comprehensive monitoring system, ensuring the safety of both the operator and those working in the vicinity. The PC400-5 series, including models like the PC400LC-5, PC400-5 MIGHTY, PC400LC-5 MIGHTY, and PC400HD-5, is a larger and more powerful variant of the PC300-5 series, designed for even more demanding applications. These excavators feature larger engines, greater digging forces, and enhanced lifting capabilities, making them suitable for large-scale construction projects, quarrying, and mining operations. Both the PC300-5 and PC400-5 series are highly sought after by construction professionals worldwide, thanks to their durability, reliability, and advanced features, which contribute to their high productivity and overall operational efficiency.