Addressing Track Issues in Kobelco SK350 Excavators

[MikePhua]

The Kobelco SK350 excavator is a robust machine widely used in construction and mining operations. However, like all heavy machinery, it is susceptible to track-related issues that can affect performance and safety. Understanding these problems and implementing effective solutions is crucial for maintaining the excavator's efficiency and longevity.
Common Track Problems in the SK350

1. Track Derailment
   Track derailment is a prevalent issue in the SK350. It often occurs when the track slips off the rollers or sprockets, typically due to improper tensioning or misalignment. For instance, operators have reported that after pulling a stump and reversing, the track came off, likely because the front idler was displaced. Reinstalling the track involves loosening the track tensioner, repositioning the track, and then tightening the tensioner. It's essential to ensure that any check valves, like small ball bearings in the tensioner, are not lost during this process.
   
2. Uneven Track Speed
   Uneven track speed, where one track operates faster than the other, can be attributed to several factors:
   • Faulty Travel Motor or Final Drive: Hydraulic leaks or internal damage can cause uneven power distribution.
     
   • Control Valve Issues: Malfunctions in the travel control valve can lead to improper signal delivery to the travel motor.
     
   • Worn Clutch Packs: Deterioration of internal components within the travel motor can affect performance.
     
   Regular inspection of these components is vital. For example, monitoring hydraulic fluid levels and replacing filters can help maintain system performance.
   
3. Track Slippage
   Track slippage, especially during forward movement, can occur when the hydraulic motors wind up without effectively moving the tracks. This issue might be due to a weak pump or control valve problems. In such cases, it's advisable to inspect the hydraulic system for any faults. Additionally, checking the rollers for wear and ensuring proper lubrication can prevent slippage.
   

Maintenance and Prevention Tips

• Regular Inspections: Conduct daily checks of the undercarriage, including rollers, sprockets, and idlers, for signs of wear or damage.
  
• Proper Lubrication: Ensure that all moving parts are adequately lubricated to reduce friction and wear.
  
• Correct Track Tension: Maintain the manufacturer's recommended track tension to prevent derailment and uneven wear.
  
• Cleanliness: Regularly clean the undercarriage to remove debris and prevent damage to components.
  

Case Study: Kobelco SK350 Track Repair
A notable instance of track repair involved a Kobelco SK350 excavator where the tracks were replaced using a Track Press machine. The process included compressing the tension spring and carefully maneuvering the new tracks into place. This meticulous approach ensured the longevity and efficiency of the undercarriage system.
Conclusion
Addressing track issues promptly and effectively is crucial for the SK350's performance and longevity. By understanding common problems and implementing preventive measures, operators can ensure smooth and efficient operation of their machinery. Regular maintenance and attention to lubrication needs are essential components of effective excavator management.