56D-50-12314 Komatsu Rubber Engine Mount — D475A Ultra-Large Mining Dozer
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu D475A-5 • In Stock
Product Overview
The 56D-50-12314 is an ultra-heavy-duty rubber engine mount designed exclusively for the Komatsu D475A — the largest crawler dozer in Komatsu's production lineup, with an operating weight exceeding 104 tonnes. At this scale, the SA12V140Z-1 engine (a twin-turbocharged V12 diesel producing over 890 horsepower) generates vibration forces that would cause catastrophic structural damage if transmitted unattenuated to the chassis.
The 56D-50-12314 mount uses an oversized natural rubber element bonded to heavy-gauge steel mounting plates designed to support the massive weight of the D475A's powertrain assembly. The rubber compound is formulated for the extreme duty cycle of ultra-class mining dozers — 20+ hours per day of continuous pushing, ripping, and dozing in some of the world's most demanding mining environments, from the Pilbara iron ore operations in Australia to the Athabasca oil sands in Canada.
The 56D-50-12314 works alongside the 195-54-78412 cushion damper in the D475A's powertrain isolation system. Given the extreme cost of D475A downtime — which can exceed $10,000 per hour in lost production at a major mining operation — maintaining engine mounts at proper service intervals delivers an exceptional return on investment. Contact us for complete D475A engine mount overhaul kit pricing.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 56D-50-12314 |
| OEM Brand | Komatsu |
| Type | Rubber Engine Mount / Anti-Vibration Mount |
| Compatible Equipment | Komatsu D475A-5, D475A-5E0 |
| Cross-Reference | 195-54-78412 (companion cushion damper) |
| Material | Natural Rubber (NR) Compound |
| Hardness | 65 ± 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 D475A-5 — 104-tonne ultra-large mining dozer — one of the world's largest
- Komatsu D475A-5E0 — Tier 2 emissions 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 4,000 to 8,000 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 | 65 ± 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 56D-50-12314 has an expected service life of 4,000 to 8,000 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.
