Komatsu PC250LC-6L: A Comprehensive Overview of the 1990s Crawler Excavator

[MikePhua]

The Komatsu PC250LC-6L, a mid-1990s crawler excavator, remains a testament to Komatsu's engineering prowess, offering robust performance and reliability for various construction tasks. Despite its age, it continues to serve in diverse applications, from urban construction to forestry projects.

Key Specifications

• Engine: SA6D95L-1 diesel engine
  
• Gross Power Output: Approximately 171.7 horsepower
  
• Operating Weight: Approximately 61,589 lbs (27.9 tons)
  
• Maximum Digging Depth: Up to 23.4 feet
  
• Maximum Reach Along Ground: Up to 34.1 feet
  
• Hydraulic Flow Capacity: 113.6 gallons per minute
  
• Track Width: 700 mm
  

These specifications position the PC250LC-6L as a versatile machine capable of handling a range of excavation tasks efficiently.

Common Maintenance Challenges
Over time, certain issues have been noted by operators of the PC250LC-6L:

• Hydraulic Performance Fluctuations: Operators have reported sporadic hydraulic responses, often linked to worn hydraulic pump components or contaminated fluid. Regular maintenance, including fluid checks and filter replacements, is essential to mitigate these issues.
  
• Slow Bucket Dumping: Some users have experienced delayed bucket dumping actions, particularly noticeable when the machine is cold. This can often be attributed to hydraulic system inconsistencies or valve issues.
  
• Swing Bearing Wear: Given the machine's age, wear on the swing bearing is a common concern. Regular inspections and timely replacements can prevent operational disruptions.
  

Maintenance Best Practices
To ensure the longevity and optimal performance of the PC250LC-6L:

• Regular Fluid Checks: Monitor hydraulic fluid levels and quality. Replace fluids as per the manufacturer's recommendations to prevent contamination and wear.
  
• Scheduled Filter Replacements: Change hydraulic and engine filters at recommended intervals to maintain system efficiency.
  
• Component Inspections: Regularly inspect key components, including the swing bearing, hydraulic pumps, and control valves, for signs of wear or damage.
  
• Operator Training: Ensure operators are trained in the machine's capabilities and limitations to prevent misuse and undue stress on components.
  

Real-World Applications and Longevity
Despite being over two decades old, the PC250LC-6L continues to be a reliable workhorse in various sectors. Its robust design and ease of maintenance have allowed many units to remain operational, especially when properly serviced and cared for.

Conclusion
The Komatsu PC250LC-6L stands as a durable and efficient machine in the realm of mid-sized crawler excavators. With proper maintenance and attention to common issues, it can continue to serve effectively in various construction applications.