Kobelco SK035-2: A Comprehensive Guide to Its Features and Common Issues

[MikePhua]

The Kobelco SK035-2 is a compact and versatile mini-excavator known for its durability and efficient performance. Designed for a variety of construction, landscaping, and utility tasks, it is particularly valued for its ability to work in confined spaces while delivering strong digging and lifting power. However, like all machinery, the SK035-2 can experience common issues that may impact its performance. Understanding these issues and how to address them is crucial for keeping the excavator running smoothly and efficiently.
In this article, we’ll explore the features, performance, and typical problems associated with the Kobelco SK035-2, along with some helpful maintenance tips and solutions.
Key Features of the Kobelco SK035-2
The Kobelco SK035-2 is packed with features that make it a reliable choice for operators. Here are some key aspects of this mini-excavator:

1. Compact Size
   One of the standout features of the SK035-2 is its compact design, making it ideal for use in tight spaces where larger machines can't fit. With a reduced tail swing, the SK035-2 can maneuver around obstacles easily, providing superior control in confined work areas.
   
2. Powerful Hydraulic System
   The SK035-2 is equipped with a hydraulic system that offers strong performance. It can handle a variety of attachments, from standard buckets to more specialized tools like augers and breakers, making it versatile across a range of tasks.
   
3. Operator Comfort
   The cab of the SK035-2 is designed with the operator’s comfort in mind. It includes features like a spacious interior, adjustable seating, and intuitive controls. These design elements help reduce fatigue during long working hours.
   
4. Fuel Efficiency
   Despite its power, the SK035-2 is designed to be fuel-efficient, offering operators lower running costs over time. This makes it a cost-effective choice for contractors who need a mini-excavator for ongoing or large-scale projects.
   
5. Easy Maintenance
   Kobelco has designed the SK035-2 with easy maintenance in mind. Accessible service points allow for quick checks of oil levels, air filters, and other essential components, reducing downtime for maintenance and repairs.
   

Common Issues and Troubleshooting
While the Kobelco SK035-2 is generally a reliable machine, it can encounter certain issues that need attention. Here are some common problems that operators may face, along with solutions to resolve them.

1. Hydraulic System Leaks
   Hydraulic leaks are a common issue in many mini-excavators, including the SK035-2. Leaks can occur due to wear on hoses, seals, or fittings. A hydraulic leak can lead to reduced performance, lower fluid levels, and potential damage to the system.
   How to Fix:
   • Inspect all hydraulic lines, fittings, and hoses for signs of wear or cracks.
     
   • Replace any damaged or leaking hoses and fittings promptly.
     
   • Check the hydraulic fluid regularly and top it off as needed.
     
   • Ensure that the pressure relief valve is functioning correctly.
     
2. Engine Overheating
   Engine overheating can cause significant problems and, if left unchecked, may lead to permanent engine damage. This issue is typically caused by low coolant levels, a clogged radiator, or a malfunctioning cooling fan.
   How to Fix:
   • Check the coolant level regularly and refill if necessary.
     
   • Inspect the radiator for any blockages or debris that may be obstructing airflow.
     
   • Ensure that the cooling fan is functioning properly, and clean it if necessary.
     
3. Electrical Issues
   Electrical problems, such as a dead battery or faulty wiring, can prevent the excavator from starting or cause intermittent electrical failures. Electrical issues are often caused by loose connections, corrosion, or damage to wiring.
   How to Fix:
   • Inspect all electrical connections, ensuring that they are tight and free from corrosion.
     
   • Check the battery charge and condition. Replace the battery if it is not holding a charge.
     
   • Inspect the alternator and wiring for any signs of damage or wear.
     
4. Track Wear and Tear
   The tracks on the SK035-2 are subject to wear, especially if the excavator is frequently used in rocky or abrasive conditions. Worn-out tracks can cause the machine to lose traction and reduce its ability to maneuver effectively.
   How to Fix:
   • Regularly inspect the tracks for signs of wear, cracks, or damage.
     
   • Adjust the track tension to ensure it is neither too loose nor too tight.
     
   • If the tracks are excessively worn, consider replacing them with new ones.
     
5. Control Valve Malfunctions
   A malfunctioning control valve can cause a variety of issues, from erratic movements to complete loss of functionality in certain parts of the machine. This can be caused by worn seals or contaminants in the hydraulic system.
   How to Fix:
   • Inspect the control valve for signs of leaks or damage.
     
   • Flush the hydraulic system to remove any contaminants.
     
   • Replace any damaged seals or components within the valve.
     

Maintenance Tips to Extend the Life of the SK035-2
Proper maintenance is essential to ensure the longevity and performance of your Kobelco SK035-2. Regular upkeep can help prevent many of the issues mentioned above. Here are a few maintenance tips to keep your mini-excavator in top condition:

1. Routine Fluid Checks
   Regularly check the hydraulic fluid, engine oil, and coolant levels. Low or contaminated fluids can lead to inefficient performance and damage to components.
   
2. Track Tension and Alignment
   Keeping the track tension properly adjusted will prevent unnecessary wear and extend the life of the undercarriage. Regularly inspect the track rollers, sprockets, and idlers for any signs of wear.
   
3. Clean the Air Filter
   A clogged air filter can reduce engine efficiency and increase fuel consumption. Clean or replace the air filter as needed to ensure optimal engine performance.
   
4. Lubricate the Pins and Bushings
   Regularly lubricate the moving parts of the excavator, including the pins and bushings, to reduce friction and prevent premature wear.
   
5. Scheduled Service Intervals
   Follow the manufacturer’s recommended service intervals for oil changes, hydraulic filter replacements, and other essential maintenance tasks.
   

Real-World Example: Overcoming Common Maintenance Challenges
A construction company working with a fleet of Kobelco SK035-2 mini-excavators encountered frequent issues with hydraulic leaks. After identifying the problem, the maintenance team discovered that the seals on the hydraulic lines were deteriorating prematurely due to exposure to harsh operating conditions. By switching to more durable, high-temperature resistant seals and performing regular pressure checks, the company was able to reduce downtime and extend the life of the excavators.
This real-world example underscores the importance of proactive maintenance and selecting the right parts for your operating environment.
Conclusion
The Kobelco SK035-2 is a powerful and efficient mini-excavator, offering excellent maneuverability and versatility for a range of applications. While it is generally a reliable machine, understanding common issues such as hydraulic leaks, engine overheating, electrical malfunctions, and track wear can help you troubleshoot and maintain the equipment effectively. By following a proper maintenance schedule and addressing minor problems early, you can ensure the continued performance and longevity of your Kobelco SK035-2, keeping your projects running smoothly and avoiding costly repairs.