The Double air horn operate device is a powerful pneumatic signaling system designed for the HOWO A7 8X4 heavy truck, providing an authoritative and highly audible warning signal for enhanced safety on the road.
This complete system includes the Bitone air horn with no support frame, Bitone air horn, Hex bolt, Flat washer, Spring washer, I shape Hexagonal nut, Straight joint NG8/NW4, Straight joint NG6/NW4, Elastic component NG6, Clamp spring NG6, Nut base NG6, Poly amide tube（Φ6*1）,
Air horn Solenoid Valve, Serrated lock washer, and Bitone air horn with support frame. When you choose genuine howo Parts
for your double air horn operate device, you ensure powerful, reliable horn performance, durable pneumatic connections, and long-lasting service life in all weather conditions.
The Bitone air horn with no support frame is a compact, high-output pneumatic horn that produces a dual-tone sound for maximum audibility. It is designed for installation directly onto the vehicle frame without an additional mounting bracket.
This horn is manufactured from corrosion-resistant materials and features a weather-sealed construction. Its compact design makes it ideal for installations where space is limited, yet it delivers a powerful sound output exceeding 115 dB.
The no-support-frame variant is often used in conjunction with a separate mounting bracket or as a replacement for existing horns. It is a key component of the double air horn operate device system.
The Bitone air horn is the primary sounding device in the double air horn operate device system. It produces a distinctive dual-frequency tone that is highly penetrating and easily heard over traffic and ambient noise.
This horn is constructed from heavy-gauge steel with a durable powder-coat finish, ensuring resistance to rust and impact damage. Its acoustic design optimizes sound projection for both highway and off-road applications.
The bitone design ensures that the horn’s sound carries well over long distances, alerting other road users and pedestrians to the presence of the vehicle, significantly enhancing overall safety.
The Hex bolt is a high-strength metric fastener used to secure the air horn, brackets, and associated components to the chassis. It provides reliable clamping force under vibration and ensures that all elements of the double air horn operate device remain firmly in place.
These bolts are manufactured from grade 8.8 steel with a zinc plating for corrosion resistance. They are available in various lengths to suit different mounting configurations and are essential for a secure installation.
The Flat washer is a plain annular disc used under bolt heads and nuts to distribute clamping load over a larger surface area. It protects the horn brackets and mounting surfaces from damage and prevents galvanic corrosion.
These washers are made from low-carbon steel with a zinc coating and are available in sizes M6 and M8. They are used in combination with spring washers to provide a vibration-resistant joint for the double air horn operate device.
The Spring washer is a split-ring locking washer that provides a spring force under the bolt head or nut, preventing loosening due to vibration. It is critical for maintaining the integrity of the double air horn operate device installation.
These washers are made from spring steel and are used in sizes M6 and M8. They work together with flat washers to ensure long-term joint stability, even in the high-vibration environment of a heavy-duty truck.
The I shape Hexagonal nut (type 1) is a standard hex nut used with hex bolts to create secure threaded joints. It is manufactured to precise tolerances, ensuring a consistent clamp load for the double air horn operate device components.
These nuts are made from carbon steel with a zinc finish and are available in M6 and M8 sizes. They are used in conjunction with washers to secure the horn brackets and solenoid valve.
The Straight joint NG8/NW4 is a connector that links the compressed air supply line to the air horn system. It provides a secure, leak-proof connection between the main air line and the horn’s pneumatic circuit.
This joint is manufactured from brass with a nickel-plated finish, offering excellent corrosion resistance and durability. The NG8/NW4 designation indicates compatibility with 8mm and 4mm tubing systems.
The Straight joint NG6/NW4 is a similar connector but designed for 6mm tubing systems. It is used to branch the air supply to various components of the double air horn operate device, including the solenoid valve and additional horns.
Like its NG8 counterpart, this joint is made from corrosion-resistant brass and features a precision-machined body for a reliable, leak-free seal. Multiple units are used to create a flexible pneumatic network.
The Elastic component NG6 is a flexible damping element that absorbs shock and vibration in the pneumatic line. It reduces stress on the fittings and extends the service life of the double air horn operate device.
This component is made from high-grade synthetic rubber that resists oil, ozone, and extreme temperatures. It is installed between the straight joint and the polyamide tube to prevent fatigue failure.
The Clamp spring NG6 is a spring-loaded retainer that securely holds the polyamide tube in place on the straight joint, preventing accidental disconnection due to vibration. It is easy to install and provides a reliable hold.
This clamp is made from stainless steel and maintains its clamping force over thousands of cycles, ensuring the pneumatic circuit remains intact and leak-free.
The Nut base NG6 is a threaded mounting base that provides a secure attachment point for the straight joint and tube assembly. It anchors the pneumatic component to the horn bracket or chassis.
This nut base is manufactured from steel with a corrosion-resistant coating and features a self-locking mechanism to prevent loosening under vibration, ensuring the integrity of the double air horn operate device.
The Poly amide tube（Φ6*1）is a flexible, dimensionally stable pneumatic hose that transmits compressed air from the solenoid valve to the air horn. Its 6mm outer diameter and 1mm wall thickness provide optimal flexibility and burst strength.
This tube is made from PA12 polyamide, offering excellent resistance to heat, oil, and abrasion. It is supplied in 8-meter lengths, providing ample material for routing the double air horn operate device system.
The smooth inner surface minimizes flow resistance, allowing the horn to reach full sound output instantly when the solenoid valve is actuated.
The Air horn Solenoid Valve is an electrically actuated valve that controls the flow of compressed air to the air horn. When energized by the horn button, it opens rapidly, allowing air to reach the horn and produce sound.
This valve is designed for 24V DC operation and features a robust, weather-sealed housing. It provides fast response times and is rated for millions of cycles, ensuring reliable performance of the double air horn operate device.
Multiple supplier variants are available, all meeting the same performance specifications and offering plug-and-play compatibility with the existing wiring harness.
The Serrated lock washer is a toothed washer that provides a high-friction interface between the bolt head and the mounting surface, preventing rotation and loosening under vibration. It is used on critical fasteners in the double air horn operate device.
This washer is made from hardened steel and features a serrated face that bites into the mating surface, offering superior locking performance compared to standard spring washers.
The Bitone air horn with support frame is a complete horn assembly that includes a sturdy mounting bracket. This variant simplifies installation by providing a pre-engineered mounting solution for the double air horn operate device.
The support frame is made from heavy-gauge steel with a corrosion-resistant coating and is designed to fit specific mounting points on the HOWO A7 8X4 chassis. It ensures optimal horn orientation for maximum sound projection.
This assembly includes all necessary mounting hardware, making it a convenient choice for replacement or upgrade of the existing horn system.
Double air horn operate device – Complete pneumatic horn system for HOWO A7 8X4
| Part NO. | Description |
|---|---|
| WG9000270002 | Bitone air horn with no support frame |
| WG9000270002/1 | Bitone air horn |
| Q150B0665 | Hex bolt |
| Q40106 | Flat washer |
| Q40306 | Spring washer |
| Q340B06 | I shape Hexagonal nut |
| WG9000361109 | Straight joint NG8/NW4 |
| WG9000361109/1 | Straight joint NG8/NW4 |
| WG9000361107 | Straight joint NG6/NW4 |
| WG9000361107/1 | Straight joint NG6/NW4 |
| WG9000361001 | Elastic component NG6 |
| WG9000361001/1 | Elastic component NG6 |
| WG9000361002 | Clamp spring NG6 |
| WG9000361002/1 | Clamp spring NG6 |
| WG9000361003 | Nut base NG6 |
| WG9000361003/1 | Nut base NG6 |
| 190003179782 | Poly amide tube（Φ6*1） |
| WG9718710003 | Air horn Solenoid Valve |
| WG9718710003/1 | Air horn Solenoid Valve |
| Q41208 | Serrated lock washer |
| WG9725270017 | Bitone air horn with support frame |
| WG9725270017/1 | Bitone air horn with support frame |
Our double air horn operate device components are manufactured from premium materials, including corrosion-resistant brass, heavy-gauge steel, and high-grade polyamide tubing. This ensures reliable performance in all weather conditions and long-term durability.
The complete system includes all necessary fittings, tubes, fasteners, and the solenoid valve, eliminating the need for additional parts. This simplifies installation and ensures compatibility across all components of the double air horn operate device.
All components are designed to OEM specifications, ensuring perfect fit on the HOWO A7 8X4. The support frame and horn brackets are precisely engineered to match existing mounting points, simplifying installation and alignment.
We back our double air horn operate device with a comprehensive warranty and technical support. Choose genuine howo Parts for the confidence of powerful, reliable horn performance and enhanced safety on the road.
The double air horn operate device is an essential safety system on the HOWO A7 8X4, providing a loud and distinctive warning signal that alerts other road users to the vehicle’s presence. Unlike electric horns, pneumatic air horns produce a much more penetrating sound that carries over long distances and through ambient noise.
The system operates by directing compressed air from the vehicle’s air brake system through a solenoid valve to the horn. When the driver presses the horn button, the solenoid valve opens, allowing pressurized air to flow into the horn chamber, where it vibrates a diaphragm to produce sound.
The double air horn operate device uses two separate horns to produce a rich, dual-tone sound that is more attention-grabbing than a single-tone horn. This is particularly important in heavy traffic or at highway speeds where ambient noise levels are high.
The bitone design also creates a more pleasant and authoritative sound that clearly communicates the presence of a large commercial vehicle, enhancing overall safety for both the driver and other road users.
Before installation, ensure the air supply is isolated and system pressure is relieved. Remove the old horn system if present, and clean the mounting area to ensure a secure fit for the double air horn operate device.
Install the support frame or directly mount the horn using the provided hex bolts, flat washers, spring washers, and I shape Hexagonal nuts. Torque the fasteners to the manufacturer’s specified values to prevent loosening due to vibration.
Connect the air supply line to the solenoid valve using the straight joint NG8/NW4 or NG6/NW4, and secure the polyamide tube with the clamp spring NG6. Install the elastic component NG6 to absorb vibration and prevent fatigue failure of the tube.
Wire the solenoid valve to the existing horn circuit, ensuring correct polarity. Use the serrated lock washer on the electrical connection to maintain a secure contact. Test the system by pressing the horn button and verifying that both horns produce a clear, powerful sound.
After installation, check all connections for air leaks using a soapy water solution. Listen for any hissing sounds that indicate a leak and tighten fittings as needed. Ensure the tube is routed away from heat sources and moving parts.
The double air horn operate device components are specifically designed for the HOWO A7 8X4, but many of the fittings and fasteners are standard and can be used on other heavy trucks with similar pneumatic systems.
The straight joints, elastic components, and clamps use standard NG6 and NG8 interfaces, making them compatible with other pneumatic components of the same specification. The solenoid valve is a standard 24V DC unit that can be replaced with equivalent parts from other suppliers.
The support frame and horn brackets are vehicle-specific, so always order the correct part numbers for your chassis. The polyamide tube is a common 6mm OD tubing that is readily available from various sources.
When sourcing replacement horns, ensure the bitone design is preserved for optimal sound performance. Consult your vehicle’s parts manual or contact our technical support team for assistance with part identification.
A properly functioning double air horn operate device significantly enhances vehicle safety by providing a powerful warning signal that can be heard at highway speeds and in noisy environments. This is especially important for heavy trucks that have large blind spots.
The use of high-quality materials, including brass fittings and polyamide tubing, ensures that the pneumatic system remains leak-free and responsive even after years of service. The solenoid valve is rated for millions of cycles, providing reliable operation throughout the vehicle’s lifetime.
For fleet operators, standardizing on this double air horn operate device kit simplifies inventory and maintenance. All components are designed to work together seamlessly, reducing the need for diagnostic time and ensuring consistent performance across the fleet.
We recommend inspecting the air horn system during regular maintenance intervals. Check the polyamide tube for cracking or abrasion, ensure all fittings are tight, and test the solenoid valve operation. Replace any worn components promptly to maintain optimal performance.
Our technical support team is available to assist with any installation questions or compatibility checks. We are committed to keeping your HOWO A7 8X4 safe and roadworthy with our double air horn operate device solutions.
Order your double air horn operate device kit today and experience the confidence that comes with genuine howo Parts. Your safety and the safety of other road users depend on a reliable horn system.
With over 20 years of experience in heavy-duty truck parts, we have the expertise to supply the highest quality components. Trust us for all your pneumatic and signaling system needs.
We offer competitive pricing and fast shipping to keep your fleet on the road. Contact us today for bulk order discounts and technical support.
Remember, a well-maintained double air horn operate device is essential for driver safety and vehicle visibility. Don’t compromise on quality – choose our comprehensive horn system kit.
Regular testing of the horn system is recommended before each trip to ensure immediate sound production when needed. A proactive approach to maintenance prevents unexpected failures and keeps your truck operating safely.
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