6261-11-8100 Komatsu Engine Mount — D85EX & D85PX Heavy Dozer
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu D85EX-15 • In Stock
Product Overview
The 6261-11-8100 is a rubber engine mount for the Komatsu D85EX and D85PX crawler dozers — the largest machines in Komatsu's mid-range dozer lineup at 26 tonnes operating weight. The D85 bridges the gap between the D65 class and the large D155 platform, filling the niche for heavy-duty dozing operations that don't quite justify a D155-class machine.
Powered by the SAA6D125E-5 engine producing 264 HP, the D85 generates substantial vibration forces that the 6261-11-8100 mount must manage. This mount works alongside the 8A31-54-1110 cushion damper to provide comprehensive powertrain isolation. Both components should be inspected together during scheduled maintenance.
The D85 is commonly deployed in highway construction, landfill management, stockpile pushing, and agricultural land clearing across North America, the Middle East, and Australia. We stock the 6261-11-8100 for rapid worldwide delivery.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 6261-11-8100 |
| OEM Brand | Komatsu |
| Type | Rubber Engine Mount / Anti-Vibration Mount |
| Compatible Equipment | Komatsu D85EX-15, D85EX-18, D85PX-15, D85PX-18 |
| Cross-Reference | 8A31-54-1110 (related cushion) |
| Material | Natural Rubber (NR) Compound |
| Hardness | 55 ± 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 D85EX-15, D85EX-18 — 26-tonne heavy-duty crawler dozer
- Komatsu D85PX-15, D85PX-18 — 26-tonne LGP variant for soft terrain
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 | 55 ± 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 6261-11-8100 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.
