EX 135 Excavator: Usage Experience and Maintenance Issues

[MikePhua]

The EX 135 is a highly regarded excavator, widely used in construction and earthworks projects. While this machine offers excellent performance, some users have encountered technical and maintenance issues during operation. This article summarizes common issues and experiences related to the EX 135 excavator, providing equipment owners with insights into its performance and offering maintenance and operational tips.
Key Features of the EX 135
The EX 135 is a mid-sized excavator known for its balanced size and powerful performance, making it suitable for digging, land leveling, and more complex construction tasks. Its hydraulic system and engine performance are commendable, and it is well-suited for a variety of work conditions. The EX 135 also offers excellent maneuverability and longevity, making it ideal for long hours of continuous operation.
Common Issues and Troubleshooting

1. Hydraulic System Problems
   One common issue reported by users is overheating or insufficient pressure in the hydraulic system after extended use. This is typically caused by hydraulic fluid contamination or a failing hydraulic pump. Regular hydraulic fluid changes and checking the pump’s condition are key steps to resolving this issue.
   
2. Engine Starting Problems
   Another frequent concern is difficulty starting the engine, especially in colder temperatures. This could be due to an aging battery, loose electrical connections, or fuel delivery issues. To prevent engine starting problems, operators should ensure the battery is fully charged, electrical connections are intact, and regularly check the fuel filter and supply lines.
   
3. Unresponsive Hydraulic Arm and Bucket Controls
   Some operators report unresponsiveness in the hydraulic arm or bucket controls, often occurring when there are pressure fluctuations during operation. This may be caused by hydraulic line leaks, faulty control valves, or inadequate system pressure. Regular hydraulic system maintenance and ensuring all connections are tight and free of wear can help mitigate this issue.
   

Maintenance Tips

1. Regular Hydraulic System Checks
   To maintain the EX 135’s hydraulic system in optimal condition, operators should regularly check the quality and level of the hydraulic fluid, replacing the fluid and filters as required by the user manual. Hydraulic hoses and connections should also be checked for leaks or loose fittings to ensure steady system pressure.
   
2. Engine Care
   It is crucial to perform regular checks on the engine’s fuel system, cooling system, and battery. In colder weather, operators should ensure the battery is sufficiently charged and take precautions against freezing to ensure smooth engine starts. Changing engine oil and filters regularly is also essential for maintaining the engine’s performance.
   
3. Cleaning and Upkeep
   Keeping the excavator clean, particularly around the hydraulic system and engine, helps reduce the risk of malfunctions. Regularly cleaning the machine’s radiator and ensuring no debris or dust blocks the cooling system will improve the cooling efficiency and reduce the chances of overheating.
   

Conclusion
The EX 135 excavator is beloved for its stable performance and versatile applications. However, like all heavy equipment, regular checks and maintenance are key to ensuring its optimal operation. By focusing on the hydraulic system, engine, and routine upkeep, operators can prevent common issues and extend the machine’s service life. Understanding these common issues and solutions will help EX 135 owners and operators improve work efficiency and reduce maintenance costs.