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| Item | Specification |
|---|---|
| Part Number | 89590440 |
| Product Name | Track Roller / Bottom Roller |
| Product Type | Undercarriage Component |
| Compatible Machine Models | Komatsu PC4000 Mining Excavator |
| Roller Type | Bottom / Lower Track Roller |
| Single Weight | 493.6 kgs (1,088.2 lbs) |
| Material | High-strength alloy steel with induction-hardened wear surface |
| Sealing Type | Floating / Duo-cone seals for contamination protection |
| Application | Supports machine weight and guides the track chain |
| Industry Focus | Surface Mining, Heavy Excavation, Overburden Removal |
Komatsu 89590440 track roller
PC4000 bottom roller
Komatsu PC4000 undercarriage parts
493.6 kg track roller for PC4000 excavator
Replacement bottom roller for Komatsu PC4000
Komatsu mining excavator track roller
PC4000 lower track roller
The Komatsu 89590440 Track Roller is a genuine OEM-specification undercarriage component designed for the Komatsu PC4000 mining excavator. This track roller (bottom roller) is a critical load-bearing component that supports the machine's extreme weight and guides the track chain during operation.
The PC4000 is an ultra-class mining excavator used in large-scale surface mining, heavy excavation, and overburden removal. This roller is manufactured from high-strength alloy steel with induction-hardened tread surfaces for maximum wear resistance in the most abrasive mining environments.
| Feature | Benefit |
|---|---|
| Induction-Hardened Tread Surface | Exceptional wear resistance in extreme mining conditions |
| Floating / Duo-Cone Seals | Advanced sealing prevents contamination and retains lubrication |
| Precision Bearings | Smooth rotation with minimal friction for extended service life |
| Ultra-Heavy-Duty Construction (493.6 kg) | Built for the largest mining excavators |
| PC4000 Optimized | Specifically engineered for Komatsu PC4000 mining excavator |
| Factory Lubricated | Maintenance-free sealed design |
| Direct OEM Replacement | Guaranteed fit and performance |
| Specification | Detail |
|---|---|
| Machine Model | Komatsu PC4000 Mining Excavator |
| Machine Type | Ultra-Class Mining Excavator |
| Operating Weight | ~400,000 - 450,000 kg |
| Bucket Capacity | ~22.0 - 28.0 m³ |
| Engine Power | ~1,800 - 2,000 HP |
| Position | Bottom / Lower track roller |
| Component | Part Number | Description |
|---|---|---|
| Idler | 97077040 | Front idler assembly (2,528 kg) |
| Sprocket | 88711040 / 97080240 | Drive sprocket |
| Top Roller | 97077240 | Carrier roller (248.3 kg) |
| Bottom Roller | 89590440 | Track roller (493.6 kg) |
| Track Shoe | — | Track pad |
Position: This is a bottom/lower track roller - supports machine weight
Lifting Requirement: Due to weight (493.6 kg / 1,088 lbs), specialized lifting equipment and mechanical assistance are required
Bolt Torque: Follow Komatsu OEM specifications for mounting bolt torque
Regular Inspection: Check for seal damage, bearing wear, and tread wear periodically
Lubrication: Factory-sealed; no field lubrication required
Replacement: Replace when tread wear exceeds OEM specifications or when seal failure occurs
| Condition | Action |
|---|---|
| New tread - smooth rotation | Normal operation |
| Moderate tread wear | Monitor regularly |
| Excessive tread wear (flat spots) | Replace roller |
| Seal leakage | Replace roller immediately |
| Bearing noise/play | Replace roller |
| Item | Detail |
|---|---|
| Part Number | 89590440 |
| Type | Track Roller / Bottom Roller |
| Weight | 493.6 kg per piece |
| Compatibility | Komatsu PC4000 Mining Excavator |
| Packaging | Individual crate |
Note: This is a bottom track roller for the Komatsu PC4000 ultra-class mining excavator. Due to its significant weight (493.6 kg / 1,088 lbs), specialized lifting equipment and professional installation are required. Verify machine serial number and undercarriage configuration before ordering. Regular inspection of track rollers is essential for optimal undercarriage performance and to prevent track chain damage on this ultra-class mining excavator.
