195-54-78412 Komatsu Rubber Cushion Damper — D375A & D475A Mining Dozer Series
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu D375A-5 • In Stock
Product Overview
The 195-54-78412 is a heavy-duty rubber cushion damper designed for Komatsu's largest mining dozer platforms: the D375A and D475A series. These are not ordinary construction dozers — the D375A weighs over 72 tonnes and the D475A exceeds 104 tonnes, making them among the largest crawler bulldozers manufactured anywhere in the world. The vibration isolation requirements at this scale are fundamentally different from those of standard dozers like the D155AX-5 (8A31-54-1130).
At operating weights exceeding 100 tonnes, the D475A's SA12V140Z-1 engine produces vibration amplitudes that would destroy unprotected structural components within weeks if transmitted directly to the chassis. The 195-54-78412 cushion damper uses an oversized natural rubber element with reinforced metal bonding plates to absorb these extreme forces, isolating the powertrain from the main frame while supporting the massive static weight of the engine and transmission assembly. The rubber compound is formulated for the harsh mining environment — constant dust infiltration, diesel fuel exposure, temperature extremes, and continuous 24/7 operation across multiple shifts.
Mining operations in Western Australia, Chile's Atacama Desert, Canadian oil sands, and South African platinum mines rely on D375A and D475A dozers for primary overburden removal, ROM pad maintenance, and tailings dam construction. In these applications, unplanned downtime costs thousands of dollars per hour in lost production. Maintaining the 195-54-78412 cushion dampers at proper service intervals is one of the most cost-effective reliability measures available to mine maintenance teams.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 195-54-78412 |
| OEM Brand | Komatsu |
| Type | Rubber Cushion Damper / Anti-Vibration Mount |
| Compatible Equipment | Komatsu D375A-5, D375A-6, D475A-5, D475A-5E0 |
| Cross-Reference | — |
| Material | Natural Rubber (NR) Compound |
| Hardness | 60 ± 5 Shore A (ISO 48-4) |
| Tensile Strength | ≥ 12 MPa (ISO 37) |
| Elongation at Break | ≥ 350% |
| Temperature Range | −40°C to +90°C |
| Compression Set | ≤ 25% (ISO 815-1) |
| Quality | ISO 9001:2015 Certified |
| Availability | In Stock — Ships Worldwide |
Compatible Komatsu Equipment
- Komatsu D375A-5 — 72-tonne class super-large mining dozer
- Komatsu D375A-6 — next-generation 72-tonne mining dozer
- Komatsu D475A-5 — 104-tonne class ultra-large mining dozer
- Komatsu D475A-5E0 — Tier 2 variant of the D475A platform
Always verify your machine model and serial number before ordering. Contact us for free cross-reference verification.
Key Features & Benefits
OEM-Equivalent Quality
Manufactured to Komatsu's original engineering specifications with ±0.5 mm dimensional tolerance. Direct bolt-on replacement with no modifications required. Metal components zinc-plated for corrosion resistance.
Extreme Temperature Range
Operational from −40°C to +90°C, covering Arctic mining to tropical construction sites. IPPD/TMQ antioxidant system prevents thermal degradation. Anti-ozonant wax migration protects surface integrity.
Extended Service Life
Engineered for 5,000 to 10,000 operating hours under standard duty cycles. HAF carbon black reinforcement provides exceptional fatigue crack resistance through millions of load cycles.
Global Express Shipping
In stock and ships worldwide in 3–5 business days via DHL, FedEx, or UPS. Full commercial documentation included for seamless customs clearance in all major markets.
Performance Specifications
| Property | Specification | Test Method |
|---|---|---|
| Hardness | 60 ± 5 Shore A | ISO 48-4 |
| Tensile Strength | ≥ 12 MPa | ISO 37 |
| Elongation at Break | ≥ 350% | ISO 37 |
| Compression Set (24h @ 70°C) | ≤ 25% | ISO 815-1 |
| Tear Strength | ≥ 25 kN/m | ISO 34-1 |
| Accelerated Aging (72h @ 100°C) | Hardness change ≤ 8 IRHD | ISO 188 |
| Ozone Resistance (200 pphm, 48h) | No cracks at 20% strain | ISO 1431-1 |
| Operating Temperature | −40°C to +90°C | Continuous |
Maintenance & Expected Lifespan
Under standard operating conditions, the 195-54-78412 has an expected service life of 5,000 to 10,000 operating hours. In severe duty applications (24/7 mining, extreme temperatures, high dust), service life may be reduced. Inspect at every major service interval (2,000 hours) for surface cracking, compression set, oil contamination, and mounting hardware integrity.
Replacement criteria: Replace when surface cracks exceed 2 mm depth, compression set exceeds 30%, rubber shows oil swelling, or the operator reports increased vibration. Always replace all mounts simultaneously for optimal isolation performance.
