20Y-54-71181 Komatsu Cab Mount Cushion — PC200 & PC300 Operator Cab Isolation
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu PC200-8 • In Stock
Product Overview
The 20Y-54-71181 is a cab mount cushion designed to isolate the operator cab from the revolving frame on Komatsu PC-series hydraulic excavators. Unlike engine mounts that address powertrain vibrations, cab mounts specifically target the vibrations and impact shocks experienced at the operator station — the most critical comfort point on the entire machine.
Modern excavator operators spend 8-12 hours per day in the cab. Excessive whole-body vibration exposure leads to operator fatigue, reduced productivity, and long-term musculoskeletal disorders. The 20Y-54-71181 cab mount absorbs both low-frequency vibrations from the engine and high-frequency impacts transmitted through the boom during digging, breaking, and demolition operations. This dual isolation requirement demands a compound formulation that differs from engine mounts like the 17A-54-46120 or 20Y-54-39520.
Compliance with ISO 2631 whole-body vibration exposure limits is increasingly enforced by occupational health regulators in the USA (OSHA), EU (Directive 2002/44/EC), and Australia (Safe Work Australia). Properly maintained cab mount cushions are the most cost-effective measure for keeping vibration exposure within regulatory limits. The 20Y-54-71181 is a direct replacement that restores factory-specification cab isolation performance.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 20Y-54-71181 |
| OEM Brand | Komatsu |
| Type | Cab Mount Cushion / Operator Cab Anti-Vibration Mount |
| Compatible Equipment | Komatsu PC200-8, PC200LC-8, PC210-10, PC220-8, PC240-10, PC270-8, PC300-8, PC350-8 |
| Cross-Reference | — |
| Material | Natural Rubber (NR) Compound |
| Hardness | 45 ± 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 PC200-8, PC200LC-8 — 20-tonne excavator cab mount
- Komatsu PC210-10, PC240-10 — 21-24 tonne Tier 4 excavators
- Komatsu PC270-8, PC300-8 — 27-30 tonne excavators
- Komatsu PC350-8 — 35-tonne large excavator
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 6,000 to 12,000 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 | 45 ± 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 20Y-54-71181 has an expected service life of 6,000 to 12,000 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.
