Product Introduction

This Trailer Control Valve WG9000360525 is an OEM heavy-duty pneumatic trailer control valve, specifically designed for Sinotruk heavy-duty trucks and commercial vehicle trailer combinations. Constructed with a precision-cast aluminum body and a robust control mechanism, it delivers reliable, consistent trailer brake actuation and control under heavy-load, long-haul, and harsh operating conditions.

Performance

• High-Strength Aluminum Construction: The precision-cast aluminum body provides exceptional strength and corrosion resistance, while remaining lightweight to minimize unsprung weight.

• Robust Control Mechanism: The heavy-duty control mechanism ensures rapid, proportional trailer brake actuation, reducing brake lag and ensuring consistent stopping performance across the entire vehicle combination.

• Multi-Port Design: The integrated multi-port configuration simplifies installation and integrates seamlessly with the vehicle’s air brake system, eliminating the need for additional fittings or adapters.

• Corrosion Resistance: The high-grade aluminum body and zinc-plated steel components provide long-lasting protection against rust and corrosion, extending service life in all weather conditions.

Core Function

1. Controls the delivery of compressed air from the tractor to the trailer’s air brake system, enabling reliable trailer brake actuation and synchronization with the tractor brakes—a core part of heavy duty truck brake parts.

2. Provides proportional control of trailer brake pressure, ensuring balanced stopping performance and preventing trailer jackknifing or instability during braking.

Integrates with the vehicle’s air brake system to provide automatic trailer brake application in the event of a trailer breakaway, enhancing overall vehicle safety.

Trailer Valve WG9000360525 – OEM Pneumatic Trailer Control Valve for Sinotruk Heavy-Duty Trucks

When your trailer braking system demands unwavering precision under extreme loads, the Trailer Valve WG9000360525 Sinotruk delivers exactly that. Engineered as a genuine OEM pneumatic trailer control valve, this component serves as the critical link between your tractor’s braking command and your trailer’s responsive stopping power. Mettlead brings this essential part directly from the factory floor to your warehouse — eliminating middlemen, reducing lead times, and ensuring every valve meets the rigorous standards that Sinotruk heavy-duty applications demand.

Whether you’re sourcing for fleet maintenance, new vehicle assembly, or aftermarket distribution, this trailer control valve stands ready to perform in the most punishing long-haul and heavy-load environments across Africa, the Middle East, Southeast Asia, and beyond.

Key Features & Benefits of the Trailer Valve WG9000360525

Precision-Engineered for Reliable Braking

This trailer control valve doesn’t just pass air — it intelligently regulates braking pressure between the tractor and trailer. The precision-cast aluminum alloy body resists corrosion while keeping weight to a minimum, and the internal control mechanism ensures smooth, proportional brake actuation every single time.

• OEM-Grade Quality: Manufactured to original Sinotruk specifications (Part No. WG9000360525), ensuring perfect fit and function without modification.
• Durable Aluminum Construction: The die-cast aluminum housing withstands vibration, temperature extremes, and road salt exposure over hundreds of thousands of kilometers.
• Consistent Pressure Regulation: Delivers proportional and stable air pressure output to the trailer brake chambers, preventing wheel lock-up and uneven braking.
• Heavy-Load Reliability: Specifically calibrated for fully loaded trailer combinations operating in demanding conditions — steep grades, frequent stops, and extended highway runs.
• Rapid Response Time: Minimizes delay between driver input and trailer brake engagement, enhancing overall vehicle safety.
• Easy Installation: Direct bolt-on replacement with OEM-matching port configurations and mounting points — no custom brackets or adapters required.

Why Procurement Managers Choose Mettlead

• Factory-Direct Pricing: We cut out distributors and trading companies, passing genuine cost savings directly to your bottom line.
• Complete Parts Coverage: Beyond this trailer valve, we supply the full spectrum ofSinotruk truck parts— from engine components to chassis hardware.
• Fast & Reliable Delivery: Streamlined logistics ensure your parts arrive on schedule, minimizing costly vehicle downtime.
• Strict Quality Control: Every valve undergoes pressure testing and dimensional inspection before shipment.
• White-Label & Custom Packaging: Build your own brand with our OEM/ODM packaging services tailored to your market.

Technical Specifications – Trailer Valve WG9000360525 Sinotruk

Application Scenarios & Compatible Vehicle Models

The Trailer Valve WG9000360525 is purpose-built for the following Sinotruk platforms and use cases:

Compatible Vehicle Models

• Sinotruk HOWO (all heavy-duty tractor variants)
• Sinotruk HOWO A7
• Sinotruk T7H
• Sinotruk SITRAK (Steer, Drive & Trailer axles)
• Other CNHTC-platform tractor-trailer combinations using the WG9000360525 specification

Typical Application Scenarios

1. New Vehicle Assembly: OEMs and assembly plants integrating genuine braking components into new tractor-trailer builds.
2. Fault Replacement: Replacing a failed or leaking trailer control valve to restore full braking performance and pass safety inspections.
3. Braking System Overhaul: Part of a comprehensive brake system maintenance program for aging fleets, ensuring continued compliance and safety.
4. Aftermarket Distribution: Stocking high-demand genuine parts for workshops and repair centers serving Sinotruk fleets.

For more braking system components — including relay valves, brake chambers, and air dryers — explore our complete braking system parts catalog.

OEM/ODM Capabilities

At Mettlead, we understand that different markets have different branding requirements. That’s precisely why we offer flexible OEM and ODM services for the Trailer Valve WG9000360525 and our entire product range:

• White-Label Packaging: Receive products in neutral packaging, ready for your own branding and labeling.
• Custom Branded Packaging: We print your logo, part numbers, and brand identity directly onto boxes and labels — minimum order quantities apply.
• Quality Documentation: Receive certificates of conformity, test reports, and packing lists customized to your import requirements.
• Bulk Order Flexibility: Whether you need 50 pieces or 5,000, our production capacity scales to match your demand cycle.

Additionally, every Trailer Valve WG9000360525 passes through our strict quality control process — including air-tightness testing, pressure response verification, and visual inspection — before it earns the right to leave our facility.

Browse our full range of Sinotruk HOWO truck parts and spare parts to discover what else we can supply for your projects.

Frequently Asked Questions (FAQ)

1. What exactly does the Trailer Valve WG9000360525 do in the braking system?

This pneumatic trailer control valve acts as the “brain” that proportionally distributes air pressure from the tractor’s brake system to the trailer’s brake chambers. In simple terms, when the driver presses the brake pedal, this valve ensures the trailer receives the correct amount of braking force — not too much (which causes wheel lock-up) and not too little (which causes jackknifing risk). It’s essential for safe, synchronized stopping of the entire tractor-trailer combination.

2. Is this Trailer Valve WG9000360525 an original OEM part or aftermarket?

This valve is manufactured to OEM specifications matching the original Sinotruk part number WG9000360525. It uses the same materials, dimensions, and performance parameters as the factory-installed component. As a result, it fits directly without any modification and performs identically to the original.

3. How can I tell if my trailer control valve needs replacement?

Several symptoms indicate a failing trailer control valve: audible air leaks around the valve body, delayed or uneven trailer braking response, trailer brakes dragging when released, or a noticeable drop in system air pressure. If your trailer consistently under-brakes or over-brakes relative to the tractor, the WG9000360525 valve is a prime suspect.

4. Will this valve fit my specific Sinotruk model?

The WG9000360525 is designed for Sinotruk HOWO, HOWO A7, T7H, and SITRAK tractor models. However, we always recommend confirming the OEM part number against your vehicle’s parts manual or VIN-based lookup. If you’re unsure, simply send us your chassis number and our technical team will verify compatibility within 24 hours.

5. What is the expected service life of this trailer control valve?

Under normal operating conditions and with proper air system maintenance (clean, dry air supply with functioning air dryers and filters), this valve typically delivers 300,000–500,000 km of reliable service. Contaminated air, excessive moisture, or neglected system maintenance can shorten this lifespan significantly.

6. Can I order a small trial quantity before committing to bulk?

Absolutely. We welcome sample orders so you can inspect quality, test fitment, and validate performance before scaling up. Many of our long-term procurement partners started with exactly this approach — a small trial that built into a lasting supply relationship.

Ready to Secure Your Supply? Get a Quote Today

Every day your fleet sits waiting for parts is a day of lost revenue. The Trailer Valve WG9000360525 Sinotruk is in stock and ready to ship — with factory-direct pricing that protects your margins and delivery timelines that keep your operations moving.

Here’s what happens when you reach out:

1. You send us your inquiry with quantity and delivery destination.
2. We respond within 12 hours with a competitive quotation and lead time.
3. You approve, we produce/pick, inspect, and ship — it’s that straightforward.

Whether you need 10 valves or 10,000, Mettlead is your reliable factory-direct partner for Sinotruk heavy-duty truck parts. We also welcome you to visit our facility for on-site inspection and quality verification.

👉
Contact us now to request your quotation
— our team is standing by to support your next order.