Dozer Undercarriage Parts
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.

| 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) |
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:
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:

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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