EX-135 UR Troubleshooting and Maintenance Issues

[MikePhua]

Overview
The EX-135 UR, a compact excavator, has been a reliable machine for many operators in the construction and agricultural sectors. However, some users have experienced specific maintenance and operational issues, leading to discussions on possible solutions. This article outlines common issues related to the EX-135 UR and provides troubleshooting guidance based on user experiences.
Common Issues with the EX-135 UR

1. Engine Performance and Stalling
   

Several users have reported that the EX-135 UR experiences engine stalling, especially during heavy-duty operations. This could be attributed to fuel delivery problems or air intake restrictions. The issue is often traced back to the fuel filters or the fuel pump, which may need regular maintenance or replacement.

1. Hydraulic System Problems
   

Hydraulic system issues are another common concern. Users have noted that the hydraulic controls, such as the arm and bucket movements, may become sluggish or unresponsive after prolonged use. This is frequently caused by hydraulic fluid contamination or air trapped in the system. Regular fluid checks and proper maintenance of the hydraulic components can prevent such issues from becoming more severe.

1. Electrical System Glitches
   

Electrical problems, including malfunctioning sensors and erratic display readings, have also been reported. These issues may be linked to loose or corroded wiring, especially in older models. It's crucial to inspect and clean the electrical connections regularly to ensure stable operation. Replacing worn-out sensors or fuses can also help to resolve the issue.

1. Underperforming Tracks
   

Another issue that some operators have faced is the underperformance of the tracks, with complaints about slow movement or uneven operation. This may result from wear on the undercarriage components, such as the sprockets and rollers, which need periodic inspection. Regular greasing and proper track tensioning can significantly extend the lifespan of these components.
Troubleshooting Tips

1. Inspect Fuel and Air Filters
   

If the engine is stalling or struggling to maintain power, start by checking the fuel filters for clogs and the air intake for blockages. Replacing these components may restore engine performance.

1. Check Hydraulic Fluid and Pressure
   

For sluggish hydraulic movements, check the hydraulic fluid levels and pressure. Low fluid levels or dirty fluid can cause the system to operate inefficiently. Flushing and refilling the hydraulic system with the appropriate fluid can often solve this issue.

1. Examine Electrical Connections and Sensors
   

When facing electrical glitches, inspect the wiring and connections for corrosion or damage. Cleaning the terminals and replacing faulty sensors or fuses can correct many electrical issues.

1. Track and Undercarriage Maintenance
   

If the tracks are not performing well, inspect the undercarriage for wear and tear. Replace any worn-out components and adjust the track tension to ensure smooth movement.
Conclusion
While the EX-135 UR is generally a reliable machine, regular maintenance and prompt troubleshooting are crucial to keeping it running efficiently. By addressing common issues such as engine stalling, hydraulic problems, electrical glitches, and track performance, operators can significantly extend the lifespan of their equipment and avoid costly repairs. Regularly inspecting and maintaining the machine's components will ensure that it remains a valuable tool for construction and agricultural work.