PC120-6 Excavator Features and Common Issues

[MikePhua]

The PC120-6 is a medium-sized tracked excavator manufactured by Komatsu, widely used in construction, mining, and earth-moving operations. Known for its excellent performance and reliability, the PC120-6 has gained global popularity. However, despite its strong design, users may encounter some common issues over time. This article will explore the main features, advantages, and typical problems faced during the operation of the PC120-6 excavator.
Main Features of the PC120-6

1. Powertrain
   

The PC120-6 is equipped with a powerful engine that ensures stable power output. The excavator uses Komatsu's unique power system, which not only delivers high work efficiency but also reduces fuel consumption. Its engine complies with stringent environmental standards and is designed to operate smoothly in various harsh conditions.

1. Operator Comfort
   

The PC120-6's cabin is designed with the operator’s comfort in mind. It features a spacious interior and an adjustable seat, allowing operators to work long hours without discomfort. The control system is intuitive and easy to use, complemented by an advanced hydraulic system for precise operation.

1. Stability and Durability
   

As a medium-sized excavator, the PC120-6 boasts a robust structural design, capable of handling heavy workloads. Whether it's for urban construction or heavy-duty mining tasks, the PC120-6 performs reliably with impressive durability, ensuring a stable operation even under challenging conditions.
Common Issues with the PC120-6

1. Hydraulic System Problems
   

Some users report a decrease in hydraulic system performance after extended use, which manifests as slow or weak bucket movements. This is often caused by hydraulic oil leaks, pump failures, or issues with the hydraulic valves. Regular checks of the hydraulic oil and system components are essential to extend the lifespan of the hydraulic system.

1. Engine Starting Issues
   

Another common problem faced by PC120-6 owners is difficulty starting the engine. This issue is typically related to battery power, starter motor malfunctions, or fuel supply system problems. When experiencing this issue, it’s advisable to check the battery voltage, starter motor, and fuel system to ensure proper functionality.

1. Cooling System Problems
   

Cooling system failures are a common issue, particularly in high-temperature environments, where the radiator may not adequately cool the engine. This can lead to engine overheating. Regularly checking coolant levels, inspecting the radiator, and cleaning the filters can help prevent such problems.

1. Track Wear
   

Prolonged operation at high loads can cause significant wear to the PC120-6’s tracks, affecting its mobility. Regularly inspecting track tension and wear, and replacing worn-out components, ensures optimal performance and prevents potential damage to the undercarriage.
Conclusion
The Komatsu PC120-6 is a reliable and efficient medium-sized excavator, suitable for a wide range of earth-moving, construction, and mining applications. Despite its excellent performance and durability, routine maintenance is essential to keep the machine in top condition. Addressing common issues such as hydraulic system failures, engine starting problems, cooling system malfunctions, and track wear promptly can ensure the PC120-6 continues to provide high productivity and reliability for years to come.