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The WG9000360507 Check Valve is a cornerstone of the Sinotruk howo parts ecosystem, designed to safeguard your vehicle’s pneumatic circuits against dangerous backflow.
Whether you are operating a HOWO 371 or a newer T7H model, this check valve (also known as a non-return valve) ensures that compressed air moves in a single direction—maintaining the pressure required for consistent braking and air suspension performance. Manufactured from high-strength alloy and fitted with heat-resistant internal seals, the WG9000360507 is built to withstand the carbon buildup and oil vapor common in high-mileage heavy trucks.
Technical Specifications:
Part Name: Check Valve / Non-Return Valve
Part Number: WG9000360507
Series Compatibility: Sinotruk HOWO, Steyr, Golden Prince
Body Material: Corrosion-resistant Die-cast Aluminum/Zinc Alloy
Nominal Pressure: 10.0 bar (Standard heavy-duty operating range)
Opening Pressure: ≤ 0.05 bar (Highly sensitive for rapid response)
Port Sizes: M22 x 1.5 (Standard metric threading for HOWO air lines)
Operating Temperature Range: -45°C to +110°C
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To maintain the long-term reliability of your Sinotruk howo parts, our engineering team recommends the following when replacing the WG9000360507:
Directional Flow Awareness: Look for the cast-in arrow on the valve body. This indicates the direction of airflow. Installing it in reverse will completely block the air supply to the tanks, leading to brake failure.
Clean the Lines: Before threading in the new valve, inspect the air lines for carbon deposits or moisture. A clogged line can cause the internal spring of the new valve to stick prematurely.
Avoid Over-Taping: While thread sealant or PTFE tape is recommended, do not apply it to the first two threads. Excess tape can break off, enter the pneumatic system, and clog downstream valves.
Leak Testing: Once installed, charge the system to full pressure and perform a "soap bubble test" on the joints. Even a microscopic leak can cause the air compressor to overwork, leading to premature failure of other Sinotruk howo parts.
Torque Settings: Use a calibrated wrench to tighten to 35-45 Nm. Excessive torque may crack the alloy housing.
