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Sinotruk SinoTruck HOWO Dryer Assembly Air Dryer Assembly Original Factory

The OEM part number WG9000360571 refers to the Air Dryer Assembly, also known as an Air Drying Unit or Compressed Air Desiccant Dryer, used in the pneumatic braking system of SINOTRUK HOWO A7, T7H, SITRAK C7H, and other series heavy-duty trucks. This critical component removes moisture, oil mist, dust, and other contaminants from compressed air generated by the air compressor before it enters the air tanks and brake chambers.
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  • WG9000360571

  • Sinotruk HOWO

Attribute Description
Part Name Air Dryer Assembly / Air Drying Unit / Desiccant Air Dryer
OEM Number WG9000360571
Alternate Format WG9000360571/1 (updated variant)
Working Pressure 1.0 MPa (nominal operating pressure)
Max burst pressure: ~1.8–2.0 MPa
Operating Temperature Range -40°C to +100°C (suitable for extreme climates)
Type Integrated air dryer with control hole for automatic regeneration cycle
Design Type Modular unit with replaceable internal desiccant filter cartridge
Inlet/Outlet Connection Standard air brake fittings (G1/2" or 3/4" NPT threads)
Material
• Housing: High-strength corrosion-resistant steel or aluminum alloy

• Internal Core: Molecular sieve (desiccant), coalescing filter media

• Seals: Oil- and heat-resistant NBR/FKM rubber
Function
• Removes water vapor from compressed air

• Filters oil, dust, and particulates

• Prevents ice formation in winter

• Protects brake valves, ABS, and suspension systems
Drain Type Automatic electrically controlled purge or manual release (depending on model)
Condition Brand new (OEM fresh stock or premium aftermarket)
空气干燥器总成-2

Name1

空气干燥器总成-5

Name2

Important Usage & Installation Notes

  1. Professional Installation Required

    • Involves disconnection of high-pressure air lines and electrical connectors.

    • Must be performed by certified technicians familiar with pneumatic systems.

  2. Replace Desiccant Cartridge Regularly

    • The internal dryer core (e.g., WG9000360521) should be replaced annually or every 80,000–100,000 km.

    • Exhausted desiccant loses drying capacity — leads to water carryover.

  3. Check Drain Functionality

    • Test automatic purge function during air build-up cycle.

    • Listen for "blow-down" sound at end of compression.

  4. Ensure Correct Airflow Direction

    • Match inlet/outlet ports — reverse installation causes malfunction.

    • Follow flow arrow on housing.

  5. Use Proper Mounting Hardware

    • Install securely to prevent vibration damage.

    • Use rubber bushings if provided for noise isolation.

  6. Inspect for Leaks After Installation

    • Apply soapy water to connections — check for bubbles.

    • Even small leaks reduce system efficiency.

  7. Avoid Contamination During Service

    • Keep open ports covered until reconnected.

    • Never install in dusty or humid environments without protection.

  8. Verify Electrical Connections (if applicable)

    • Some models include heater or solenoid drain — ensure plug is tight and undamaged.

    • Check fuse and circuit before start-up.

  9. Do Not Bypass the Dryer

    • Operating without a functional dryer risks complete brake system failure over time.

  10. Storage Advice

    • Store upright in dry indoor environment.

    • Seal openings with caps to prevent debris entry.


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