208-54-71180 Komatsu Cab Mount — PC400 & PC450 Large Excavator
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu PC400-7 • In Stock
Product Overview
The 208-54-71180 is a heavy-duty cab mount cushion designed for Komatsu PC400 and PC450 class large hydraulic excavators. At 40-45 tonnes operating weight, these machines generate significant vibration energy during quarrying, mass excavation, demolition, and mining operations. The cab mount must isolate the operator from all of this while maintaining precise control feel through the joystick inputs.
Unlike engine mounts that deal with continuous rotational vibrations, cab mounts on large excavators must absorb sharp transient impacts — the shock loads transmitted through the boom when the bucket strikes rock, concrete, or frozen ground. The 208-54-71180 compound is formulated for this mixed-mode loading profile, combining the damping characteristics needed for steady-state vibration with the energy absorption capacity required for impact shock isolation.
PC400/PC450 operators often work in demolition and rock excavation where shock loads are frequent and severe. Properly maintained cab mounts are essential for keeping vibration exposure within ISO 2631 daily limits and reducing operator injury risk.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 208-54-71180 |
| OEM Brand | Komatsu |
| Type | Cab Mount Cushion / Operator Cab Anti-Vibration Mount |
| Compatible Equipment | Komatsu PC400-7, PC400-8, PC400LC-8, PC450-7, PC450-8, PC450LC-8 |
| Cross-Reference | — |
| Material | Natural Rubber (NR) Compound |
| Hardness | 50 ± 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 PC400-7, PC400-8 — 40-tonne class large excavator
- Komatsu PC400LC-8 — 40-tonne long-carriage excavator
- Komatsu PC450-7, PC450-8 — 45-tonne class heavy excavator
- Komatsu PC450LC-8 — 45-tonne long-reach configuration
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 | 50 ± 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 208-54-71180 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.
