36.71 GBP
Lesjöfors 8121201 Bonnet
Comfort features: without speaker Manufacturer's item number: 8121201Brand new
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Lesjöfors 8121201 Bonnet – A Comprehensive Overview
The Lesjöfors 8121201 Bonnet is a high‑performance gas spring system designed specifically for automotive hoods. It delivers smooth, controlled lift and reliable support, ensuring that the hood opens effortlessly while maintaining a secure seal when closed. This article delves into every aspect of the product, from its engineering fundamentals to practical installation tips.
Engineering Excellence
The core of the Lesjöfors 8121201 Bonnet lies in its precision‑machined steel housing and a robust, high‑pressure gas cylinder. The spring’s internal design incorporates:
- High‑strength alloy steel for the housing, providing exceptional durability against corrosion and impact.
- Controlled gas pressure that offers a consistent lift force across the entire travel range.
- Sealed piston assembly to prevent leakage and maintain performance over time.
- Integrated mounting brackets that align with standard automotive hood hinges.
These features combine to create a system that can withstand the rigors of daily use, extreme temperatures, and varying load conditions.
Key Performance Characteristics
The Lesjöfors 8121201 Bonnet delivers the following performance metrics:
| Parameter | Description |
|---|---|
| Operating Pressure | Typically between 30–50 bar, depending on the specific model variant. |
| Travel Length | Approximately 200–250 mm, allowing full hood lift. |
| Load Capacity | Up to 200 kg, ensuring support for heavy hood assemblies. |
| Temperature Range | -40°C to +120°C, suitable for all climates. |
Compatibility and Vehicle Integration
The Lesjöfors 8121201 Bonnet is engineered to fit a wide range of automotive models, particularly those requiring robust hood support. Common applications include:
- Passenger cars with heavy alloy or steel hoods.
- Commercial vehicles where hood durability is critical.
- Custom builds and aftermarket modifications that demand reliable lift mechanisms.
Its modular mounting system allows for straightforward adaptation to various hinge designs, making it a versatile choice for mechanics and automotive enthusiasts alike.
Installation Guide
Installing the Lesjöfors 8121201 Bonnet involves several precise steps. Follow the procedure below to ensure optimal performance:
- Preparation: Remove the existing hood support system. Clean all mounting surfaces to eliminate debris and corrosion.
- Positioning: Align the gas spring housing with the hood hinge. Use a torque wrench to secure mounting bolts at the specified torque value (typically 20–25 Nm).
- Sealing: Apply a high‑temperature sealant to the gas cylinder’s base to prevent leaks.
- Testing: Lift the hood manually and observe the spring’s behavior. The lift should be smooth, with no abrupt stops.
- Final Adjustment: Fine‑tune the spring tension by adjusting the mounting angle if necessary. Ensure that the hood closes firmly and remains in place.
Adhering to these steps guarantees that the Lesjöfors 8121201 Bonnet functions as intended, providing reliable support for years.
Maintenance and Longevity
To preserve the integrity of the gas spring, perform routine checks and maintenance:
- Visual Inspection: Look for signs of rust, dents, or gas leakage. Replace immediately if any damage is detected.
- Lubrication: Apply a light oil to the pivot points every 12 months to reduce friction.
- Temperature Monitoring: Avoid exposing the spring to extreme heat for prolonged periods, as this can degrade the gas seal.
- Re‑torqueing: Recheck mounting bolts every 6 months to ensure they remain tight.
Following these guidelines will extend the life of the Lesjöfors 8121201 Bonnet and maintain its performance.
Technical Specifications Summary
Lesjöfors 8121201 Bonnet – Technical Data Sheet:
| Feature | Specification |
|---|---|
| Model Number | 8121201 |
| Material | Alloy Steel (Housing), High‑Pressure Gas (Cylinder) |
| Operating Pressure | 30–50 bar |
| Travel Length | 200–250 mm |
| Load Capacity | Up to 200 kg |
| Temperature Range | -40°C to +120°C |
| Mounting Type | Standard automotive hinge compatible |
Frequently Asked Questions (FAQ)
Q1: Can the Lesjöfors 8121201 Bonnet be used on all car models?
A1: It is designed for a broad range of vehicles, especially those with heavy or alloy hoods. However, always verify compatibility with your specific model before installation.
Q2: How often should the gas spring be inspected?
A2: Perform a visual inspection every 6 months and check for leaks or wear. If any issues arise, replace the unit promptly.
Q3: Is professional installation required?
A3: While the system is user‑friendly, proper torque and alignment are critical. If you lack experience with automotive suspension components, consider professional assistance.
Q4: What is the expected lifespan of the Lesjöfors 8121201 Bonnet?
A4: With regular maintenance and proper use, the gas spring can last 10–15 years or more, depending on operating conditions.
Conclusion
The Lesjöfors 8121201 Bonnet exemplifies engineering precision and reliability in automotive hood support systems. Its robust construction, adaptable design, and straightforward installation make it an ideal choice for both professional mechanics and dedicated hobbyists. By adhering to the recommended maintenance practices, users can enjoy consistent performance and longevity from this high‑quality gas spring.
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| Tags | Lesjöfors 8121201 Bonnet |
| Identifiers | |
| Brand | ![]() Lesjöfors is a Swedish company that manufactures springs and wire products. It was founded in 1916 and is now a subsidiary of the Swedish company IKV. |
| Model | Lesjöfors 8121201 |
| MPN | Lesjöfors 8121201 |
| ID | 7078037 |
| Dimensions / Weight | |
| Key Features | |

