This comprehensive service and operation & maintenance manual covers the Komatsu PC650-3, PC650LC-3, and PC650SE-3 hydraulic excavators with serial numbers 10501 and up. It provides detailed information for maintaining, assembling, disassembling, and servicing these powerful machines. This manual is your key to understanding the inner workings of your excavator and ensuring it operates at peak performance.

The service repair manual dives deep into the intricacies of your machine, offering detailed information across various sections:

* **Engine:** Learn about the SA6D140-1 engine powering these models, with cross-references to the dedicated 140 Series Engine Shop Manual for further details.
* **Power Train:** Gain a thorough understanding of the power train components and their functions.
* **Undercarriage:** Find detailed instructions for maintaining and repairing the undercarriage system, a critical aspect of your excavator's durability.
* **Air System:** This section delves into the operation and maintenance of the air system, ensuring proper functioning and safety.
* **Hydraulic System:** Comprehend the intricate workings of the hydraulic system, essential for understanding the excavator's functionality and troubleshooting potential issues.
* **Electric and Electronic System:** Master the complexities of the electrical and electronic components, crucial for maintaining proper operation and performing diagnostics.

The operation & maintenance manual complements the service repair manual, guiding you through the daily use and care of your Komatsu excavator. This section covers critical aspects of operation, maintenance, and troubleshooting:

* **Breaking in Your New Machine:** Learn the proper procedures for breaking in a new machine to ensure optimal performance and longevity.
* **Safety Hints:** Prioritize safety with comprehensive safety guidelines for operating and maintaining your excavator.
* **General Locations and Specifications:** Find essential information about key components and specifications.
* **Instruments and Controls:** Familiarize yourself with the instruments and controls, understanding their functions and how to operate them safely.
* **Operating the Air Conditioner:** Learn how to operate and maintain the air conditioner system effectively.
* **Using Accumulators:** Understand the purpose and proper utilization of accumulators for optimal machine performance.
* **Using Grease Gun:** Learn the proper procedures for greasing components to prevent wear and ensure smooth operation.
* **Check Before Starting:** Follow a pre-start inspection checklist to ensure your excavator is ready for safe operation.
* **Operating Your Machine:** Gain practical tips and techniques for operating your excavator efficiently and safely.
* **Handling of Battery:** Learn proper battery handling procedures, including storage, charging, and replacement.
* **Transportation:** Understand the safe and efficient transportation of your excavator.
* **Cold Weather Operation:** Find specific instructions for operating your excavator in cold weather climates.
* **Periodic Maintenance:** Learn about routine maintenance schedules and procedures to keep your excavator running smoothly.
* **Adjustment:** Find detailed instructions for adjusting various components for optimal performance.
* **Troubleshooting Guide:** Access a comprehensive troubleshooting guide to diagnose and resolve potential issues.
* **Storage:** Learn how to properly store your excavator when not in use to preserve its condition.
* **Service Meter:** Understand the use and importance of the service meter for tracking maintenance intervals.
* **Machine and Engine Serial Numbers:** Find information on identifying your machine and engine.
* **Fuel, Coolant and Lubricants:** Learn about recommended fluids and lubricants for your excavator.
* **Loading Shovel:** Learn proper techniques for operating the loading shovel.

This comprehensive manual offers all the information you need to confidently maintain, repair, and operate your Komatsu PC650-3, PC650LC-3, and PC650SE-3 hydraulic excavators.

## The Komatsu PC650-3, PC650LC-3, and PC650SE-3: Powerful Hydraulic Excavators for Demanding Tasks

The Komatsu PC650-3, PC650LC-3, and PC650SE-3 are heavy-duty hydraulic excavators designed for large-scale construction and mining operations. These machines are known for their exceptional power, durability, and operator comfort, making them ideal for projects requiring efficient and reliable performance. The PC650-3 series is equipped with a powerful Komatsu SAA6D140E-3 engine, providing 419 horsepower (312 kW) and delivering impressive digging force. The excavator's robust construction features a reinforced boom and arm, ensuring long-lasting performance even in the most challenging environments. The PC650LC-3 model boasts a long reach configuration, ideal for extended reach excavation, while the PC650SE-3 is specifically designed for superior stability with its wide crawler base.

All models in the PC650-3 series are equipped with advanced hydraulic systems, providing precise control and efficient operation. These systems are designed to minimize hydraulic losses, enhancing fuel efficiency. The comfortable and spacious cab offers excellent visibility and ergonomic controls, contributing to operator comfort and productivity. The PC650-3 series features an optional Komatsu Traction Control System (K-TCS), which enhances traction and stability on uneven terrain. Furthermore, the machines are equipped with extensive safety features, including an emergency stop system, a work lamp system, and a fire suppression system, providing a safe and secure working environment. These features, combined with the powerful engine, robust construction, and advanced hydraulic systems, make the Komatsu PC650-3 series an excellent choice for demanding construction and mining projects.