Kobelco SK330LC vs. SK330LC-6E: Understanding Differences, Features, and Serial Clarity

[MikePhua]

When considering a Kobelco mid-size excavator, the choice between the SK330LC and the later SK330LC-6E is common. While both models share core functionality, there are a few key distinctions and updates to note, especially if you’re evaluating a specific serial number or seeking service documentation.
Understanding the Model Designations and Serial Number Threshold

• The suffix “-6E” designates a later production series in the SK330 line, indicating updated electronics, control systems, and potential refinements in hydraulics and instrumentation.
  
• According to feedback from experienced operators, serial numbers beginning with “YC09-03255” and up are among the final SK330-6E production units, just before the transition to the SK330-8 series.
  
• For example, an SK330LC with serial number YC09-03306 would fall squarely into the 6E category.
  

Core Specifications (SK330LC Base Model)

• Engine: Turbocharged Mitsubishi 6D16-TLEB delivering around 247 hp (238 hp net) at 2,200 rpm
  
• Operating Weight: Approximately 80,300 lbs (~36,400 kg)
  
• Dimensions:
  • Length: ~36 ft 7 in
    
  • Width: ~11 ft 6 in
    
  • Height: ~11 ft 2 in
    
• Performance:
  • Max digging depth: ~24 ft (7 m)
    
  • Max loading height: ~25 ft (8 m)
    
  • Max reach: ~36 ft (11 m)
    
  • Bucket capacity: 1–2 cu yd (0.9–2 m³)
    
• Hydraulics:
  • Pump flow capacity: ~140 gpm (530 lpm)
    
  • Relief valve pressure: ~3,990 psi
    
• Mobility:
  • Ground pressure: ~5,470 psi
    
  • Travel speed: ~4 mph (6 km/h)
    
  • Drawbar pull: ~63,800 lbs
    

Noteworthy Upgrades in the 6E Version

• Instrument Cluster Programming: Enhanced with updated ECU logic and diagnostic capabilities.
  
• Potential Hydraulic and Electronic Enhancements: While technical specifics are best confirmed via service manuals, the “-6E” versions often include refined hydraulic responsiveness and simplified maintenance protocols.
  
• A dedicated service manual exists for the SK330LC-6E (and NLC-6E), providing valuable insight into system layouts, troubleshooting flowcharts, and component part numbers.
  

Model Comparison Highlights

• Feature: Serial Numbers
  • SK330LC (Base): Pre-YC09-03255
    
  • SK330LC-6E (Later Version): YC09-03255 and above
    
• Feature: Instrumentation
  • SK330LC (Base): Standard cluster and programming
    
  • SK330LC-6E (Later Version): Updated electronics/ECU configuration
    
• Feature: Hydraulics & Systems
  • SK330LC (Base): Baseline hydraulic logic
    
  • SK330LC-6E (Later Version): Possible refinements (refer to manual)
    
• Feature: Support Documentation
  • SK330LC (Base): Generic manuals available
    
  • SK330LC-6E (Later Version): Specific 6E shop manual improves accuracy
    

Real-World Context
One owner recently confirmed that their unit with serial number YC09-03306 belonged to the 6E series, thanks to match serial guidance from knowledgeable users. This distinction was important for sourcing the correct manual and verifying parts like the injection pump governor.
Conclusion & Recommendations

• To confirm model version, check the serial number. Units from YC09-03255 onward are SK330LC-6E models.
  
• For accurate servicing, obtain the dedicated SK330LC-6E/NLC-6E shop manual. This gives detailed instructions across hydraulic, electrical, and maintenance systems.
  
• Standard specs for job planning and transport logistics can be referenced from general SK330LC data.
  

By identifying your model correctly and accessing the right documentation, maintenance becomes more precise, parts acquisition smoother, and machine care more effective.