• Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.
  • Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.
  • Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.
  • Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.
  • Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.

Komatsu D65EX-16 Carrier Roller Assembly/DPW Machinery Parts supply high quality dozer undercarriage parts.

Product Specifications



The Komatsu D65EX-16 Carrier Roller Assembly is a crucial undercarriage component that supports the track chain and helps distribute the machine’s weight. Here’s a detailed breakdown:

D65EX-16 Upper Roller.

Key Features:

  • Function: Supports the track chain, reduces friction, and ensures smooth movement.

  • Compatibility: Designed for the Komatsu D65EX-16 bulldozer (and similar models like D65PX-16, D65WX-16).

  • Material: Typically made from high-strength steel with durable bearings for longevity.

  • Sealing: Equipped with labyrinth seals or grease seals to prevent dirt and moisture ingress.

D65EX-16 UPPER roller

Common Part Numbers:

  • Komatsu OEM Part No.:

    • 144-81-30050 (Carrier Roller Assembly)

    • 14X-30-00140 (Alternate variant)

  • Aftermarket Alternatives: Available from brands like DPW PARTS;CQCTRACK.

Symptoms of a Failing Carrier Roller:

  • Excessive track sag or misalignment.

  • Unusual grinding or squeaking noises.

  • Visible wear, cracks, or oil leakage from seals.

  • Uneven track wear patterns.

Replacement & Maintenance Tips:

  1. Inspect Regularly: Check for wear, play, or seal damage.

  2. Lubrication: Some models require periodic greasing (check manual).

  3. Replacement: Always replace in pairs (left & right) for balanced performance.

  4. Torque Specifications: Follow Komatsu’s guidelines when installing bolts.

Where to Buy:

  • OEM Parts: Komatsu dealerships.

  • Aftermarket: Reliable suppliers like DPW PARTS.

  • Online Marketplaces: DPW Machinery Parts Industrial, or specialized undercarriage stores.

Cost Estimate:

  • OEM: $500 - $1,200 per roller (varies by region).

  • Aftermarket: $300 - $800 (ensure quality matches OEM standards).

If you need help identifying the exact part number or sourcing one, let me know your machine’s serial number or specific requirements!

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