< img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=400502599665994&ev=PageView&noscript=1" /> OEM Bulldozer Track Bottom Roller 198-30-00433 For Komatsu D475 Undercarriage,Bulldozer Track Bottom Roller 198-30-00433 For Komatsu D475 Undercarriage Manufacturer,Custom Bulldozer Track Bottom Roller 198-30-00433 For Komatsu D475 Undercarriage
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Bulldozer Track Bottom Roller 198-30-00433 for Komatsu D475 Undercarriage

Komatsu D475 track roller

Bulldozer Track Bottom Roller 198-30-00433 for Komatsu D475 Undercarriage

The Komatsu D475 is a 100-ton titan designed for the most aggressive mining and large-scale earthmoving environments. In such conditions, the undercarriage is under constant siege from extreme pressure and abrasive materials. Our 198-30-00433 Bottom Roller is specifically engineered as a high-performance replacement that meets or exceeds OEM standards, ensuring your machine stays mobile and productive.

Dozer undercarriage parts

D475 Track Roller Technical Specifications

Feature Mining-Grade Specifications
OEM Part Number 198-30-00433
Model Compatibility Komatsu D475A-3, D475A-5, D475A-5E0
Type Single Flange / Double Flange Available
Material High-Strength Alloy Steel (Cast & Heat Treated)
Hardness Surface HRC 52-58
Hardness Depth 12mm – 16mm (Induction Hardened)

Why Bottom Rollers Matter So Much on a D475 Dozer

On a machine this size (8 rollers per side, each weighing over 220 kg), the bottom rollers are literally the foundation of the entire undercarriage. They:

  • Support and evenly distribute the bulldozer’s enormous weight across the track
  • Absorb massive impact and shock loads when the blade bites into hard rock
  • Guide the track chain smoothly so the machine stays stable and productive

If one roller seizes, wears flat, or starts leaking oil, the whole track starts to “walk” sideways, you burn through track shoes and links faster, and suddenly you’re looking at thousands of dollars in extra downtime and repair costs.


Product Advantage:

  • Deep surface hardening – HRC 48-55, 5–8 mm depth (some batches reach HRC 58). The core stays tough so the roller doesn’t crack under impact.
  • Fully lubricated & sealed – Floating seals + high-quality O-rings keep dirt out and oil in — exactly like the OEM.
  • Precision machined – Every roller is CNC-finished so it bolts straight in with zero alignment problems.KASU Factory overview

Maintenance Tips Specific to the D475 Undercarriage

    • Daily: Quick visual check for oil leaks or flat spots while the machine is still warm.
    • Every 250 hours: Clean debris from around the rollers (packed mud kills seals fast).
    • Every 500–1,000 hours: Measure roller diameter and check track sag. On the D475, 25–35 mm sag is ideal.
    • When you see oil on the ground or hear grinding → replace immediately. One failed roller can destroy the adjacent links and shoes in a hurry.

Frequently Asked Questions

Q: Will this fit my D475A-3 or older D475?

A: Yes — the 198-30-00433 series has been used across multiple D475 generations with the same track pitch.

Q: How many do I need per machine?

A: 8 per side (16 total) for a standard D475A-5.

Q: Can I mix single-flange and double-flange rollers?

A: Not recommended on the D475. Run all double-flange in the positions that originally came with double-flange rollers.

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