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The WG9000360521 is a compressed air dryer (also known as an air drying chamber or air filter dryer) designed for use in the pneumatic braking systems of heavy-duty trucks and commercial vehicles. Manufactured to OEM standards, it plays a critical role in maintaining the reliability, safety, and longevity of air brake systems by removing moisture, oil, and solid contaminants from compressed air.
It is primarily associated with Sinotruk (CNHTC) HOWO series trucks, but also compatible with many other Chinese and international heavy truck platforms.
| Attribute | Specification |
|---|---|
| Part Number | WG9000360521 |
| Alternative Numbers / Cross References | See Section 5 below |
| Product Name | Air Dryer / Air Drying Chamber / Compressed Air Filter Dryer |
| Type | Brake System Component – Pneumatic Air Treatment |
| Primary Function | Removes moisture, oil mist, dust, pollen, mold, bacteria, and other particulates from compressed air |
| Material | High-strength steel housing; internal desiccant cartridge and filtration media |
| Weight | Approx. 4.025 kg (some variants report ~2.2 kg due to different core configurations) |
| Operating Pressure Range | Typically 7–12 bar (100–175 psi), compatible with standard truck air systems |
| Desiccant Type | Integrated silica gel or molecular sieve cartridge |
| Drain Mechanism | Automatic (thermo-electric or purge valve-assisted) |
| Inlet/Outlet Ports | Standard G1/2" or ISO 15022 threaded connections |
| Quality Standards | Meets or exceeds OEM specifications; certified under ISO 9001, CCC, and 100% factory tested |
| Origin | Made in Shandong, China |
| Warranty | Up to 12 months against manufacturing defects (varies by supplier) |
✅ Moisture Removal: Efficiently absorbs water vapor from compressed air, preventing condensation in brake lines.
✅ Multi-Stage Filtration: Combines mechanical filtration (dust, debris) with chemical absorption (moisture/oil).
✅ Corrosion Prevention: Dry air protects valves, relay valves, ABS modulators, and air tanks from rust and freezing.
✅ Enhanced Safety: Ensures consistent brake response by eliminating air system blockages caused by ice or sludge.
✅ Durable Construction: Steel body withstands vibration, high pressure, and harsh environmental conditions.
✅ Automatic Drainage: Equipped with electric or timed purge function to expel collected water without manual intervention.
✅ Long Service Life: Designed for extended operation between replacements; some models support cartridge-only servicing.
| Series | Compatible Models |
|---|---|
| HOWO Series | HOWO, HOWO A7, T7H, C7H, T5G |
| Sitrak Series | SITRAK C7H, G7H, C5H, G5 |
| Steyr Platform | Steyr King, Steyr-based CNHTC trucks |
| Other CNHTC Lines | Hoka, Hohan, Mining & Heavy Haul variants |
Due to standardized pneumatic systems, this part fits various Chinese and global heavy-duty truck brands:
Shaanxi Auto (Shacman) – X3000, L3000, M3000
FAW Jiefang – J6P, J7 series
Dongfeng Commercial Vehicles – DFAC, KX/KL, L3000
Beiben Trucks – NG80, 2634, 2627
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Cross Reference & Alternative Numbers
While WG9000360521 is the primary OEM number, the following identifiers may be used interchangeably across suppliers:
| Type | Part Number / Identifier |
|---|---|
| OEM Number | WG9000360521 |
| Aftermarket Replacements | AD-WG9000360521, HT-AIRDRYER-01, CNHTC-WG9000360521 |
| Universal Equivalent Classes | Truck Air Dryer – 12V Automatic Drain, Steel Body |
| Supplier SKUs | Varies by vendor (e.g., Jinan Zichen Trading Co., Sinotruk Genuine Parts) |
| Interchangeable With | Some models can replace early versions like WG9000360520, but check compatibility |
Usage Scenarios & Applications
| Scenario | Application Benefit |
|---|---|
| Mountainous Regions | Prevents ice formation in brake lines during cold descents |
| High-Humidity Climates | Reduces risk of water accumulation in air tanks and control valves |
| Fleet Operations | Minimizes downtime due to brake failure from contaminated air |
| Mining & Construction | Protects sensitive components from dust and abrasive particles |
| Long-Haul Transport | Maintains brake sensitivity after repeated compressor cycles |
| Cold Weather Operation | Critical for preventing freeze-up in winter conditions (-30°C to -40°C) |
⚠️ Important Operating & Maintenance Notes:
| Recommendation | Details |
|---|---|
| ✅ Regular Inspection | Check monthly for leaks, corrosion, or damaged wiring (for electric drain). |
| ✅ Monitor Drain Function | Ensure automatic purge operates correctly after each shutdown cycle. |
| ✅ Replace on Schedule | Recommended every 20,000–40,000 km or 12–18 months, depending on environment. |
| ✅ Check Desiccant Condition | If white silica turns pink or clumps, replace immediately. |
| ✅ Use OEM-Quality Replacements | Avoid low-cost copies with poor seals or weak desiccants that fail prematurely. |
| ❌ Do Not Bypass | Never remove or disable the air dryer — leads to rapid brake system degradation. |
| ️ Professional Installation Required | Must be installed by trained technician to ensure correct orientation, secure mounting, and leak-free connections. |
| Seal Integrity | Replace O-rings and gaskets during installation to prevent air leakage. |
| Detail | Description |
|---|---|
| Availability | Widely available globally via online B2B platforms |
| Major Platforms | Alibaba, AliExpress, Made-in-China, Global Sources |
| Authorized Suppliers | Sinotruk Genuine Parts Network, Jinan Zichen Trading Co., Ltd., CNHTC distributors |
| Packaging Options | |
| - Standard | Neutral brown carton (1 pc per box) |
| - Bulk Orders | Wooden crates for container shipments |
| - Custom Branding | Available for large orders (private label, logo printing) |
| MOQ (Minimum Order Quantity) | 1 piece (sample), 10–50 pcs for wholesale pricing |
| Shipping | Air freight (DHL, FedEx) or sea freight depending on volume |
| Benefit | Impact |
|---|---|
| ✔️ Improved Brake Reliability | Clean, dry air ensures fast and responsive brake actuation |
| ✔️ Extended Component Life | Protects air tanks, solenoid valves, ABS units, and relays |
| ✔️ Reduced Maintenance Costs | Fewer failures in pneumatic system reduce repair frequency |
| ✔️ Cold Climate Readiness | Prevents dangerous brake lock-ups due to frozen moisture |
| ✔️ Compliance Ready | Supports meeting national and international vehicle safety standards |
