Product Overview — Part 8A31-54-1130
The 8A31-54-1130 is a precision-manufactured Cab Mounts component. The 8A31-54-1130 front cab mount rubber is the front-position component for Hitachi ZX series excavator cab mounting systems. Front cab mounts on Hitachi excavators handle the horizontal thrust forces from boom and arm attachment operations while also providing vertical vibration isolation. The front position geometry typically differs from rear mounts — front mounts may have additional lateral stiffness to control cab fore-aft motion under attachment loading, while rear mounts provide primarily vertical compliance. Part 8A31-54-1130 is engineered for the specific load conditions at Hitachi ZX front cab attachment points. Complete Hitachi ZX cab mount replacement typically requires all four mounts simultaneously to maintain uniform cab geometry and equal load sharing. See 8A31-54-1110 (primary) and 8A31-54-1140 (rear) for the full set. Contact us for multi-part kit pricing.
Technical Specifications
| Property | Value | Standard |
|---|---|---|
| Part Number | 8A31-54-1130 | OEM Specification |
| Hardness | 45–70 Shore A (application specific) | ISO 48-4 / ASTM D2240 |
| Tensile Strength | ≥ 16 MPa | ISO 37 / ASTM D412 |
| Elongation at Break | ≥ 300% | ISO 37 / ASTM D412 |
| Compression Set | ≤ 25% (22h/70°C) | ISO 815-1 / ASTM D395 |
| Temperature Range | −40°C to +90°C | Operational limits |
| Ozone Resistance | No cracking 168h | ISO 1431-1 |
| Fire Safety | EN 45545-2 HL2/HL3 available | EN 45545-2:2013 |
| Fatigue Life | > 1,000,000 cycles | Dynamic fatigue protocol |
Applications
Hitachi ZX series excavator front cab mounting; Hitachi EX series front cab mount positions; Hitachi ZX300 ZX350 front cab.
Our technical team can assess suitability for other equipment types. Contact us with the make, model, and serial number for a precise cross-reference confirmation.
Material & Quality Standards
- Base Polymer: Natural Rubber (NR) or NR/SBR blend — excellent resilience and fatigue resistance
- Reinforcing Fillers: High-structure carbon black for controlled stiffness and wear resistance
- Protection Additives: Anti-ozonant wax and chemical antioxidant for extended outdoor service life
- Bonding System: Chemically bonded rubber-to-metal interface exceeding bulk rubber strength
- EN 45545-2 Option: Halogen-free flame retardant meeting smoke toxicity requirements (on request)
Every batch produced under ISO 9001:2015 QMS with full material traceability. Certificate of Conformance and material test reports available upon request.
Installation Guidelines
- Inspect on arrival: Verify part number 8A31-54-1130. Check for transit damage — reject any non-conforming component.
- Clean mating surfaces: Remove all rust, old rubber fragments, grease, and paint before installation.
- Align correctly: Follow assembly drawing orientation. Incorrect orientation may cause premature failure.
- Torque fasteners: Use calibrated torque wrench and cross-pattern tightening sequence per OEM specification.
- Post-install check: Inspect for correct seating. Run equipment at low speed to verify no abnormal noise or vibration.