KM778 Top Carrier Roller for Komatsu D30 D31P + More

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  • Part Number: KM778
  • Top Roller / Carrier Roller
  • Fits Komatsu: D30-17, D30-20, D31P-20
  • Sold As - Individual Roller
$295.99 $298.99 Save $3.00
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Part Number

KM778

Fitment

Komatsu: D30-17, D30-20, D31P-20

Application

Equipment Type Crawler Dozer / Dozer
Function Supports upper track return and carrier roller guidance on compatible crawler dozer undercarriages.

Trust & Assurance

12-Month Warranty
Free Shipping in the USA
Proven Quality
Trusted by Contractors

Same machine series may use different undercarriage parts. Please confirm KM778 matches your existing roller before ordering.

Product Description

  • This aftermarket replacement top carrier roller is designed for compatible Komatsu D30 and D31 crawler dozer models.
  • Top carrier rollers support the upper track return path and help guide the track smoothly through the undercarriage.
  • Built for Komatsu D30/D31 dozer applications, this carrier roller helps maintain upper track guidance during dozer travel and jobsite operation.
  • Part number KM778 can be used to confirm replacement compatibility with your existing top carrier roller assembly.
  • Fits Komatsu models including D30-17, D30-20, and D31P-20. Please verify your machine model and part number before ordering.

Key Features

Direct Replacement: Replacement top carrier roller using part number KM778 for compatible Komatsu equipment.

Upper Track Return: Supports upper track return and helps guide carrier roller movement on compatible crawler dozer undercarriages.

Komatsu D30/D31 Dozer Fitment: Designed for listed Komatsu D30 and D31 crawler dozer carrier roller applications.

Smooth Roller Operation: Supports smooth rotation to help reduce vibration, noise, and unnecessary track wear.

Part Number & Fitment Check: Part number KM778 can be used to confirm compatibility. Verify your machine model and existing top carrier roller before ordering.

Warranty

12-Month Warranty.
Every rubber track, roller, sprocket, and idler we sell is backed by a 12-month warranty.
If it doesn’t hold up, we make it right.

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Free Shipping in the USA

We keep inventory stocked and offer fast nationwide shipping, often same or next business day, from strategically located warehouses.

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