KOMATSU PC2000 Front Idler Ass’y(21T-30-00381)/guide wheel for heavy-duty excavator undercarriage part-Made by CQC Track

The front idler (also called track idler) for a Komatsu PC2000 excavator is a crucial undercarriage component that guides and tensions the track chain. Here’s everything you need to know:

Komatsu PC2000 Front Idler – Key Specifications

1. Function:
   • Maintains proper track tension
   • Guides track chain movement
   • Absorbs impacts during operation
2. Typical Part Numbers (varies by exact model):
   • 21T-30-00381 (PC2000-8 standard idler)
   • 21T-30-00481 (PC2000-6 heavy-duty version)
3. Key Features:
   • Diameter: ~800-900mm (varies by model)
   • Material: Forged steel with hardened wearing surface
   • Greaseable bushings for maintenance
   • Flange design to prevent track derailment
4. Replacement Indicators:
   • Visible wear on idler surface (>10mm wear)
   • Cracks or damage to flanges
   • Excessive play in bushings
   • Abnormal track vibration/noise

Installation Location

The front idler is positioned at the front of the undercarriage, opposite the drive sprocket. It’s adjustable to maintain proper track tension.

Maintenance Tips

• Check idler wear every 500 service hours
• Maintain proper track tension (refer to operator’s manual)
• Grease regularly (use Komatsu-recommended grease)
• Replace in pairs if possible for even wear

Replacement Options

1. OEM Parts: Available through Komatsu dealers (highest cost but guaranteed fit)
2. Aftermarket: Quality alternatives from Berco, ITR, or VMT
3. Rebuilt Units: Cost-effective option for some applications

Compatible Models

• PC2000-8
• PC2000LC-8 (long undercarriage version)
• Similar large mining excavators

Would you like:

• Specific dimensional drawings?
• Recommended maintenance intervals?
• Sources for purchasing replacement idlers?

Pro Tip: Always check your machine’s serial number when ordering to ensure proper fitment, as designs may vary between production years.