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+--- Thread: Issues and Troubleshooting with Hitachi EX 120-2 Excavators (/thread-6975.html)
Issues and Troubleshooting with Hitachi EX 120-2 Excavators - MikePhua - 07-05-2025
The Hitachi EX 120-2 is a well-known model in the construction and excavation world. However, like all heavy equipment, it can encounter issues over time. One such issue is related to hydraulic problems, which have been a common subject of concern for some owners. In this article, we will look at the potential problems and troubleshooting tips for those experiencing issues with their Hitachi EX 120-2 excavators.
Hydraulic Issues
One of the most frequently encountered issues with the Hitachi EX 120-2 is hydraulic system malfunctions. Owners have reported issues with the hydraulic system becoming weak or unresponsive. This can result in sluggish performance, with the machine's arm, bucket, or other components failing to respond quickly or efficiently.
Common causes of hydraulic problems include low oil levels, dirty filters, or air trapped within the system. It is essential to regularly check the hydraulic fluid and replace the filters as part of routine maintenance.
Engine Problems
Another issue with the Hitachi EX 120-2 is engine-related problems. Some owners have reported difficulty starting the engine, along with a decrease in power and performance during operation. In some cases, the engine may start but fail to run consistently, leading to erratic operation.
This type of issue is often related to fuel system problems, such as clogged filters or issues with the injectors. Fuel contamination or using the wrong type of fuel can also cause engine performance issues.
Electrical System Issues
The electrical system in the Hitachi EX 120-2 may also experience failures, with some users reporting issues with the control panel, wiring, and connectors. A malfunctioning electrical system can lead to various problems, including failure to start, malfunctioning lights, or problems with the hydraulic controls.
Ensuring that the electrical system is well-maintained, including checking for frayed wires or loose connections, is essential to prevent such issues.
Troubleshooting and Solutions
To troubleshoot and resolve these issues, it’s recommended that operators follow these basic steps:
- Check Hydraulic Fluid: Make sure the hydraulic fluid is at the correct level and replace any dirty filters.
- Inspect the Engine: If the engine isn’t starting or running properly, check the fuel system and replace any clogged filters.
- Electrical System Check: Regularly inspect the electrical components for signs of wear, corrosion, or loose connections.
- Professional Help: If troubleshooting these issues yourself doesn’t resolve the problem, it may be time to seek the help of a professional technician who can diagnose the issue more thoroughly.
The Hitachi EX 120-2, like all heavy machinery, is prone to certain issues, especially as it ages. However, with proper maintenance and attention to key components, many of these problems can be avoided or easily fixed. Regular checks on the hydraulic system, engine, and electrical components will ensure that the machine operates efficiently and reliably for years to come.