Product Overview — Part 55154977
The 55154977 is a precision-manufactured Vibration Dampers component. The 55154977 anti-vibration mount is designed for Case excavator cab and engine isolation systems. As a Case/CNH anti-vibration component, this mount uses a rubber compound matched to Case's vibration specification for CX series hydraulic excavators. The component provides primary vibration isolation at cab mounting points or engine bracket positions, depending on installation location. Natural rubber or NR/SBR blend compound provides low-frequency isolation efficiency with adequate load capacity for the high static and dynamic forces in Case excavator applications. For customers transitioning from Case to BOMAG equipment in fleet operations, our cross-reference team can provide dimensional comparison between part 55154977 and equivalent BOMAG vibration damper components. Related Case cab mounts: 55017281 and 55159454.
Technical Specifications
| Property | Value | Standard |
|---|---|---|
| Part Number | 55154977 | 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
Case CX series excavator anti-vibration; Case WX wheel excavator cab mounts; CNH construction equipment isolation.
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 55154977. 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.