Product Overview — Part 6129902
The 6129902 is a precision-manufactured Primary Suspension component for demanding industrial and transportation applications. High-performance cab suspension spring designed as a direct OEM replacement for Volvo truck and heavy equipment. Engineered to provide optimal progressive spring rates for operator comfort and cab structural protection across the full load spectrum.
Produced in our ISO 9001:2015 certified facility using advanced vulcanization processes and carefully selected elastomer compounds, part 6129902 meets the exacting requirements of original equipment manufacturers and aftermarket service providers. Every unit undergoes dimensional verification, hardness testing, and visual inspection before release for shipment to customers in the United States, Canada, Europe, and Asia-Pacific.
This component belongs to our Primary Suspension product line. Browse related products including 1524771 and 6180100 for complete system maintenance solutions.
Technical Specifications
| Property | Value | Standard |
|---|---|---|
| Part Number | 6129902 | OEM Specification |
| Hardness | 60 ± 5 Shore A | ISO 48-4 / ASTM D2240 |
| Tensile Strength | ≥ 18 MPa | ISO 37 / ASTM D412 |
| Elongation at Break | ≥ 350% | ISO 37 / ASTM D412 |
| Compression Set | ≤ 25% (22h/70°C) | ISO 815-1 / ASTM D395 |
| Temperature Range | -40°C to +80°C | Operational limits |
| Ozone Resistance | No cracking 168h | ISO 1431-1 |
| Fire Safety | EN 45545-2 HL2/HL3 avail. | EN 45545-2:2013 |
| Fatigue Life | >1,500,000 cycles | Dynamic fatigue protocol |
Applications
Volvo VNL, VNM, VNX long-haul truck cab mounts; Volvo FH series international trucks; Volvo articulated haulers; preventive maintenance cab suspension replacement programs.
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 before ordering.
Material & Quality Standards
- Base Polymer: Natural Rubber (NR) or NR/SBR blend — excellent resilience and low heat buildup
- Reinforcing Fillers: High-structure carbon black for controlled stiffness and wear resistance
- Protection Additives: Anti-ozonant wax and chemical antioxidant system for extended 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 (railway grade)
Every batch produced under ISO 9001:2015 QMS with full material traceability. Certificates of conformance and material test reports available upon request.
Installation Guidelines
- Inspect on arrival: Verify part number 6129902. Check for transit damage or surface defects — reject any visually non-conforming component.
- Clean mating surfaces: Remove all rust, old rubber fragments, grease, and paint. Flat tolerance within 0.5 mm.
- Align correctly: Follow assembly drawing orientation. Incorrect orientation can cause premature failure.
- Torque fasteners: Use calibrated torque wrench and cross-pattern tightening sequence per OEM specification.
- Post-install check: Visual inspection for correct seating. Run equipment at low speed to verify absence of abnormal noise or vibration.