The part is a precision pneumatic sub‑assembly that regulates air flow and pressure for locking mechanisms and auxiliary circuits on the Sitrak C7H heavy truck. This compact Air Lock Control Unit integrates high‑quality tubing, vibration‑damping elements, and sealing components to ensure reliable operation in harsh environments. Its modular design allows for easy integration into existing pneumatic systems, making it an ideal replacement or upgrade for original equipment.
The part is engineered to deliver consistent air pressure and flow, enabling precise actuation of diff‑locks, suspension adjustments, and other air‑operated devices. Each component of The part is selected for its durability and compatibility with standard pneumatic fittings. With its robust construction and leak‑free connections, The part minimizes maintenance and maximizes uptime for your fleet.
For detailed fitment and compatibility information, please refer to the Sinotruk Catalog. This genuine Air Lock Control Unit ensures perfect integration with your Sitrak C7H, providing dependable performance for millions of kilometres.
The Polyamide tube (Φ6*1) is a flexible nylon air line with 6 mm outer diameter and 1 mm wall thickness, used for control and signal lines within The part. Its smooth inner bore ensures minimal pressure drop, while the material resists abrasion, chemicals, and UV degradation.
This tube is supplied in a convenient 5‑metre length, providing ample material for routing connections between The part and the actuators. Its flexibility facilitates easy installation in tight spaces, and the tube can be cut to exact lengths with standard cutters.
The Elastic component NG6 is a rubber isolator that absorbs vibration and reduces noise transmission within the Air Lock Control Unit. Its elastomeric material dampens shocks from road irregularities and engine movement, protecting the tubing and fittings from fatigue.
Designed specifically for NG6 fittings, this component maintains its damping properties over a wide temperature range, ensuring the Air Lock Control Unit remains reliable in both cold and hot climates. Two isolators are included for versatile mounting.
The Clamp spring NG6 is a retaining ring that secures the elastic component in place, ensuring the isolator remains correctly positioned within The part. Its spring‑steel construction provides consistent tension, preventing the isolator from shifting under vibration.
This clamp spring is easy to install and remove, allowing for quick servicing of The part without damaging the elastomeric parts. Two springs are supplied, matching the number of elastic components.
The Nut base NG6 is a threaded mounting base that provides a secure anchor for the elastic component and the tube fittings. It is precision‑machined from corrosion‑resistant steel and features a flange for even load distribution within the Air Lock Control Unit.
This base is compatible with standard NG6 hardware, simplifying the integration of the Air Lock Control Unit into your existing pneumatic layout. Two nut bases are included, offering reliable fastening for the isolators.
The Plug M10X1 is a sealing plug used to close unused ports on the Air Lock Control Unit manifold or valve bodies. Its M10x1 thread provides a tight seal, preventing air leakage and contamination ingress.
Made from zinc‑plated steel, this plug offers excellent corrosion resistance and is designed for repeated removal and reinstallation. It is a simple but essential component for maintaining the integrity of the Air Lock Control Unit.
The Straight joint body NG6/NW4 is a pneumatic fitting that connects NG6 tubing to NW4 ports, enabling seamless integration between different line sizes within the Air Lock Control Unit. Its straight‑through design minimises flow resistance.
Constructed from high‑quality brass with a nickel‑plated finish, this joint provides excellent sealing performance and durability. Two joints are supplied, allowing for flexible routing of the Air Lock Control Unit’s air lines.
| NO. | Part NO. | Name |
|---|---|---|
| 1 | 190003179782 | Polyamide tube (Φ6*1) |
| 2 | WG9000361001 | Elastic component NG6 |
| 3 | WG9000361002 | Clamp spring NG6 |
| 4 | WG9000361003 | Nut base NG6 |
| 5 | WG9000361010 | Plug M10X1 |
| 6 | WG9000361107 | Straight joint body NG6/NW4 |
Our Air Lock Control Unit is manufactured to the same specifications as the original equipment, guaranteeing a perfect fit and reliable operation. Each component is tested for pressure integrity and durability, ensuring that your Air Lock Control Unit performs as expected.
The use of high‑grade materials and precise machining sets our Air Lock Control Unit apart from generic alternatives, providing confidence in every installation.
The Air Lock Control Unit integrates high‑quality sealing components and vibration isolators, eliminating air leaks and reducing noise. The elastic components and clamp springs work together to maintain a secure, rattle‑free assembly.
This attention to detail extends the service life of your Air Lock Control Unit and the connected actuators, reducing maintenance frequency.
Our Air Lock Control Unit is supplied as a complete kit with all necessary tubes, fittings, and fasteners. The pre‑selected components eliminate guesswork and reduce installation time, allowing you to get your vehicle back on the road faster.
The included polyamide tube can be cut to length, and the straight joints ensure simple, reliable connections within the Air Lock Control Unit.
We maintain a large inventory of Air Lock Control Unit kits to ensure fast delivery to customers worldwide, with prompt shipping and real‑time tracking.
Our technical support team is available to assist with any installation queries, ensuring a smooth experience for your Air Lock Control Unit.
The Air Lock Control Unit is a central component in the pneumatic system, managing the air supply to diff‑locks, suspension leveling valves, and other auxiliary devices. Its precise regulation of air pressure ensures that these systems engage and disengage smoothly, improving vehicle traction and stability.
A faulty Air Lock Control Unit can lead to sluggish actuator response, air leaks, or complete system failure. Replacing it with our genuine unit restores full functionality and ensures that all pneumatic systems operate at their design specifications.
The Air Lock Control Unit is built from materials that resist ageing, UV radiation, and temperature extremes. The polyamide tube maintains its flexibility from -40°C to +80°C, while the elastomeric components retain their damping properties over a wide range.
The brass fittings are nickel‑plated to prevent corrosion, ensuring that the Air Lock Control Unit remains leak‑free and functional even in salty or humid environments. This robust construction makes it a reliable choice for trucks operating in diverse climates.
When installing the Air Lock Control Unit, ensure all tube ends are cut squarely and fully inserted into the fittings. Use the supplied clamp springs and elastic components to secure the unit to the chassis, isolating it from vibration.
Check all connections for leaks by applying soapy water and observing for bubbles. Tighten any loose fittings and test the system under pressure before returning the vehicle to service. Regular inspection of the Air Lock Control Unit is recommended to maintain optimal performance.
To extend the life of your Air Lock Control Unit, periodically inspect the polyamide tube for abrasion or kinks, and replace it if any damage is found. Clean the elastic components with a mild detergent to remove oil and dirt that could accelerate aging.
Check the plug M10X1 for tightness and replace any missing or damaged plugs. Lubricate the straight joint bodies with a light coat of pneumatic oil to prevent seizing. With proper care, the Air Lock Control Unit will provide dependable service for millions of kilometres.
This Air Lock Control Unit is specifically designed for the Sitrak C7H chassis, fitting all variants with standard pneumatic control circuits. It is compatible with both manual and automated transmission configurations, and with or without diff‑lock systems.
The mounting dimensions and port sizes match the factory specifications, ensuring a direct replacement without modifications. Verify your vehicle’s air system layout before ordering to confirm compatibility with the Air Lock Control Unit.
Each Air Lock Control Unit is tested for pressure integrity and functional performance before shipment. We simulate operating conditions to ensure that the unit delivers consistent air flow and responds correctly to control signals.
Our quality control process includes checking all threaded connections and verifying the clamping force of the elastic components. We stand behind the Air Lock Control Unit with a comprehensive warranty, giving you peace of mind.
We keep a large stock of Air Lock Control Unit kits to ensure immediate dispatch. Orders are typically processed within 24 hours, and tracking information is provided for every shipment.
Our global logistics network ensures that your Air Lock Control Unit arrives quickly, minimising vehicle downtime and keeping your fleet operational.
Replacing a worn or damaged Air Lock Control Unit with our genuine part is a cost‑effective way to restore pneumatic performance and prevent secondary failures. The durable materials and precision engineering reduce the need for frequent replacements, offering excellent long‑term value.
The complete kit eliminates the need for multiple purchases, saving both time and money during maintenance.
Aftermarket pneumatic kits often use inferior plastics and imprecise fittings, leading to leaks and premature failure. Our Air Lock Control Unit is manufactured to the same standards as the original equipment, ensuring consistent quality and safety.
By choosing our genuine Air Lock Control Unit, you avoid the risks associated with substandard parts and ensure that your Sitrak C7H remains reliable and compliant with safety regulations.
A properly functioning Air Lock Control Unit is essential for the safe operation of diff‑locks and suspension systems, especially in off‑road and slippery conditions. Our unit complies with all relevant safety standards and is designed to maintain system pressure without failure.
Regular inspection of the Air Lock Control Unit is recommended to ensure continued compliance with safety regulations and to protect the driver and cargo.
Our Air Lock Control Unit is produced using precision injection‑moulding and automated assembly techniques, ensuring consistent quality and tight tolerances. The polyamide tube is extruded to exact dimensions, and the metal components are machined with CNC accuracy.
This advanced manufacturing approach guarantees that every Air Lock Control Unit meets the high standards demanded by modern heavy trucks, providing reliable performance and long service intervals.
The layout of the Air Lock Control Unit allows for straightforward access to all components, making inspection and replacement simple. The elastic components and clamp springs can be removed without special tools, and the tube fittings are designed for rapid disconnect.
This service‑oriented design reduces downtime and labour costs, making the Air Lock Control Unit a practical choice for fleet maintenance programmes.
We are committed to providing the highest quality Air Lock Control Unit and supporting our customers with responsive service. If you have any questions or encounter any issues, our team is ready to assist.
Your satisfaction is our priority, and we strive to exceed your expectations with every order of the Air Lock Control Unit.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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