The Trailer valve assembly is a complete pneumatic control system for HOWO 4X2 tractor trucks. This comprehensive kit integrates every component needed for trailer brake and supply control, ensuring reliable and safe operation. The Trailer valve assembly is engineered to meet the demanding requirements of heavy-duty towing applications.
The Trailer valve assembly includes a wide range of precision parts: Trailer socket mounting bracket assembly, Hex bolt with serrated flange M14*1.5, Rubber holder, Fixed holder, Hex flange nut with teeth M14*1.5, Spiral pipe, Trailer valve bracket, Trailer control valve, Hex flange nut M8, Hexagon bolt with flange M10, Hexagon nut with flange M10, Elastic element NG12, Circip NG12, Nut holder NG12, Straight-through joint body NG12 / NW9, Backup washer M16X1.5, Ferrule-type straight-through cross-plate joint body L12 / NG12, Flat washer, Hexagon thin nut M18X1.5, Trailer joint (Power supply red), Mis connection-proof trailer connector (Control yellow), Ferrule-type end straight-through next joint body M16 / M18, Sealing ring, Brake plastic hose, Hex bolt with serrated flange M14*1.5, and Right-angle joint body NG12 / NW9.
When you choose authentic howo Parts, you receive a Trailer valve assembly that meets all OEM specifications. This assembly is designed to provide consistent air supply, precise brake modulation, and secure connections for your trailer systems. The Trailer valve assembly ensures safe and reliable towing performance.
The Trailer valve assembly is a direct replacement for worn or damaged units, restoring full functionality to your trailer brake and supply systems. With the Trailer valve assembly, you get the reliability that professional drivers depend on for safe trailer operation.
The Trailer socket mounting bracket assembly is a robust support structure that securely holds the trailer electrical and pneumatic connectors. It ensures proper alignment and protection against vibration and impact, maintaining reliable connections.
The Hex bolt with serrated flange M14*1.5 is a high-strength fastener used to secure mounting brackets and components of the Trailer valve assembly. Its serrated flange provides a locking action, preventing loosening under vibration.
The Rubber holder is a flexible mounting element that cushions and secures pneumatic lines or wiring harnesses. It reduces chafing and absorbs vibration, protecting the Trailer valve assembly components from fatigue.
The Fixed holder is a rigid mounting bracket that provides a stable anchor point for pneumatic lines and connectors. It maintains the routing of hoses and prevents unwanted movement, ensuring reliable connections.
The Hex flange nut with teeth M14*1.5 is a prevailing-torque lock nut that provides secure fastening for critical connections. Its toothed flange bites into the mating surface, preventing loosening from vibration.
The Spiral pipe is a flexible coiled tubing that provides strain relief and allows movement between the tractor and trailer. It protects the air line from kinking and abrasion, ensuring continuous air supply.
The Trailer valve bracket is a precision-machined mounting support that securely holds the Trailer control valve to the chassis. Its robust construction ensures stable valve operation and accurate alignment.
The Trailer control valve is the core component of the Trailer valve assembly, regulating air pressure to the trailer brakes. It responds to the foot brake signal, modulating pressure for smooth and proportional braking.
The Hex flange nut M8 is a standard fastener used for lighter mounting points within the Trailer valve assembly. Its integral flange distributes load and eliminates the need for separate washers.
The Hexagon bolt with flange M10 is a heavy-duty fastener used to secure the valve bracket and other structural components. Its flange provides a large bearing surface for secure clamping.
The Hexagon nut with flange M10 is the matching nut for the M10 bolt, providing a secure, vibration-resistant fastening. Its flanged design eliminates the need for a separate washer.
The Elastic element NG12 is a rubber sealing ring that provides an airtight seal between pneumatic fittings and the valve body. It compensates for thermal expansion and maintains leak-free connections.
The Circip NG12 is a retaining ring that locks pneumatic fittings securely in place. Its spring-tempered design prevents accidental disconnection due to vibration or pull forces.
The Nut holder NG12 is a precision component that retains the nut on pneumatic fittings, simplifying assembly and preventing loss. It ensures consistent clamping force and easy disassembly.
The Straight-through joint body NG12 / NW9 is an inline connector that joins two hoses or extends the air line without changing direction. Its compact design minimizes pressure drop and simplifies routing.
The Backup washer M16X1.5 is a flat washer used under nuts to distribute load and protect the mating surface. It prevents damage to soft materials and ensures even clamping pressure.
This ferrule-type joint body is a cross-adaptor that connects L12 tubing to NG12 fittings. Its swivel design allows orientation adjustment during installation, simplifying complex pneumatic layouts.
The Flat washer is a standard steel washer used with bolts and nuts to distribute load and prevent galling. It is essential for achieving proper torque and protecting surfaces in the Trailer valve assembly.
The Hexagon thin nut M18X1.5 is a low-profile lock nut used in confined spaces. It provides adequate thread engagement while allowing clearance for adjacent components in the Trailer valve assembly.
The Trailer joint (Power supply red) is a heavy-duty electrical connector that supplies power to the trailer’s lighting and auxiliary systems. Its red coding indicates the primary power circuit for easy identification.
This yellow-coded connector is a mis connection-proof trailer connector for control circuits. Its unique keying prevents incorrect plugging, protecting the Trailer valve assembly from electrical faults.
This ferrule-type joint body adapts between M16 and M18 threads, providing a secure transition for pneumatic lines. Its compact design ensures leak-free connections in tight spaces.
The Sealing ring is a precision O-ring that provides a static seal between threaded fittings and ports. It is made from oil-resistant NBR rubber and maintains seal integrity under pressure.
The Brake plastic hose is a flexible polyamide tube that conveys compressed air throughout the Trailer valve assembly. Its smooth bore and braided reinforcement ensure reliable air flow and pressure retention.
This additional Hex bolt with serrated flange M14*1.5 provides extra fastening capacity for multiple bracket attachments within the Trailer valve assembly, ensuring robust mounting.
The Right-angle joint body NG12 / NW9 is a 90-degree fitting that changes air flow direction. Its angled design allows routing hoses around obstacles, essential for compact chassis layouts.
Trailer valve assembly – Complete Pneumatic Control Kit for HOWO 4X2
| Material Encoding | Name |
|---|---|
| YZ952536000251 | Trailer socket mounting bracket assembly |
| ZQ18114110TF6 | Hex bolt with serrated flange M14*1.5 |
| YZ952536000100 | Rubber holder |
| YZ952536000101 | Fixed holder |
| ZQ325141T3F6 | Hex flange nut with teeth M14*1.5 |
| WG9000360140 | Spiral pipe |
| YG9525360014 | Trailer valve bracket |
| WG9000360505 | Trailer control valve |
| ZQ32008 | Hex flange nut M8 |
| ZQ1841035 | Hexagon bolt with flange M10 |
| ZQ32010 | Hexagon nut with flange M10 |
| WG9000361007 | Elastic element NG12 |
| WG9000361008 | Circip NG12 |
| WG9000361009 | Nut holder NG12 |
| WG9000361101 | Straight-through joint body NG12 / NW9 |
| WG9000361037 | Backup washer M16X1.5 |
| WG9000361105 | Ferrule-type straight-through cross-plate joint body L12 / NG12 |
| Q401B18 | Flat washer |
| WG9000361014 | Hexagon thin nut M18X1.5 |
| WG9000360170 | Trailer joint (Power supply red) |
| WG9000360171 | Mis connection-proof trailer connector (Control yellow) |
| 1.90004E+11 | Ferrule-type end straight-through next joint body M16 / M18 |
| 1406 070015 | Sealing ring |
| 1.90003E+11 | Brake plastic hose |
| 1.90003E+11 | Brake plastic hose |
| ZQ18114130TF6 | Hex bolt with serrated flange M14*1.5 |
| WG9000361204 | Right-angle joint body NG12 / NW9 |
The Trailer valve assembly includes every pneumatic and electrical component needed for full trailer brake control. From the valve to hoses, fittings, and hardware, this kit eliminates the need for separate sourcing, saving time and ensuring compatibility.
All components of the Trailer valve assembly are manufactured to original equipment specifications, ensuring precise fit and long-lasting performance. The control valve, joints, and hoses are tested for pressure integrity and durability.
With all necessary brackets, nuts, bolts, and sealing elements included, the Trailer valve assembly installs quickly using standard tools. The clear component organization reduces assembly errors and speeds up service time.
This Trailer valve assembly is compatible with all HOWO 4X2 models and is backed by our worldwide distribution network. Technical support is available to assist with any installation or troubleshooting needs.
The Trailer valve assembly is designed to provide reliable, proportional braking for trailers. The Trailer control valve responds instantly to the foot brake, delivering smooth pressure build-up and release. Its internal diaphragms and springs are calibrated to match HOWO 4X2 air system characteristics, ensuring consistent brake feel and trailer stability.
The pneumatic circuit is optimized with straight-through and right-angle joint bodies that minimize flow restriction. The use of high-quality plastic hoses with ferrule fittings guarantees leak-free connections even under extreme temperature and pressure variations. The spiral pipe provides flexibility for articulation while resisting abrasion.
Electrical integrity is ensured by the Trailer joint (Power supply red) and the mis connection-proof trailer connector (Control yellow), which prevent accidental cross-wiring. The mounting brackets and holders are rigidly constructed to maintain alignment and reduce stress on the components. Every element of the Trailer valve assembly is engineered for rugged, long-term service.
Each Trailer valve assembly kit undergoes rigorous quality checks. The control valve is tested on a pressure bench to verify its response curve and leakage rate. All fittings and hoses are inspected for dimensional accuracy and burst pressure. Fasteners are sampled for tensile strength and torque retention.
We also perform assembly validation on random kits, checking that all components fit together correctly and that the system maintains pressure over time. Environmental tests include thermal cycling and vibration to simulate real-world conditions. These protocols guarantee that the Trailer valve assembly delivers consistent, safe performance throughout its service life.
Our quality management system is certified to ISO 9001, and each kit is traceable to its production batch, enabling rapid root-cause analysis if any issue arises. The Trailer valve assembly is a product of our commitment to excellence in pneumatic control.
Investing in a genuine Trailer valve assembly reduces the risk of brake system failures that can lead to costly downtime and safety incidents. The all-in-one kit simplifies repairs, minimizing the time vehicles are out of service. The durable components extend maintenance intervals, lowering overall operating costs.
For fleet managers, this kit reduces inventory complexity by consolidating multiple part numbers into one package. It eliminates the need to stock separate hoses, fittings, and brackets, reducing overhead and ensuring that workshops always have the correct parts on hand. The Trailer valve assembly also includes consumables like sealing rings and washers, preventing last-minute supply runs.
Improved trailer brake performance also contributes to fuel efficiency and tire life, as smooth, controlled braking reduces skidding and uneven tire wear. These cumulative benefits make the Trailer valve assembly a smart investment for any fleet operation.
The Trailer valve assembly is designed as a direct replacement for the original equipment. All brackets, hoses, and fittings are pre-sized to match the HOWO 4X2 chassis layout, requiring no modifications. The color-coded electrical connectors prevent wiring errors, and the pre-formed spiral pipe simplifies routing.
The assembly includes all necessary hardware: bolts, nuts, washers, and elastic elements. The installation process is straightforward and can be completed with standard workshop tools. The clear component identification and included documentation reduce the chance of incorrect assembly, ensuring that the system functions correctly from the start.
For technicians, the Trailer valve assembly offers a frustration-free experience. The modular design allows individual components to be replaced without disturbing the entire system, simplifying future maintenance. This ease of service translates to faster turnaround times and reduced labor costs.
Each Trailer valve assembly is supplied with comprehensive installation instructions, including torque specifications for fasteners, routing diagrams for hoses, and wiring schematics for the electrical connectors. This documentation helps ensure that the system is installed safely and correctly.
Our technical support team is available to assist with any questions regarding the Trailer valve assembly, from verifying compatibility to troubleshooting air or electrical issues. We also provide online resources, including video tutorials and FAQs, to help workshops achieve the best results.
With the Trailer valve assembly, you gain not only a complete pneumatic kit but also the confidence of having expert support whenever you need it.
The Trailer valve assembly is the ultimate solution for maintaining or upgrading the trailer brake and control system of your HOWO 4X2 tractor. With its comprehensive kit of genuine components, including the control valve, fittings, hoses, brackets, and hardware, this assembly ensures reliable, proportional braking and secure electrical connections. Choose the Trailer valve assembly for your fleet and experience the difference that genuine HOWO quality delivers.
We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.
