973-899-041-0 / 9738990410 | WABCO QR030 Quick Release Valve | 1/2" Inlet, 3/8" Outlet | Cross KN32003 | New Genuine OEM
WABCO 973-899-041-0 / 9738990410 QR030 quick release valve designed for commercial truck and trailer air-brake systems. This valve rapidly exhausts air pressure from the brake chambers when the brakes are released, helping reduce brake-release lag and improve overall system response.
Built to WABCO OEM specifications, this new genuine valve features a 1/2-inch inlet port, 3/8-inch outlet ports, and a 3 PSI differential crack-pressure rating. It is suitable for replacement of a compatible worn, leaking, sticking, or damaged quick release valve.
In stock and ready to ship from DPX in Mansfield, Ohio.
Call to confirm availability: 419-522-3320
Key Specifications
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Primary Part Number: 973-899-041-0
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Alternate Part Number: 9738990410
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Brand: WABCO
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Model: QR030
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Product Type: Quick Release Air-Brake Valve
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Inlet Port Size: 1/2"
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Outlet Port Size: 3/8"
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Crack Pressure: 3 PSI Differential
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Cross Reference: KN32003
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Condition: New Genuine OEM
Applications & Fitment
- Commercial truck air-brake systems
- Heavy-duty trailer and semi-trailer air-brake systems
- Brake-chamber quick-release applications
- Replacement of compatible WABCO QR030 valves
- Applications using the KN32003 configuration
Fitment Note: Verify the valve model, inlet and outlet port sizes, thread type, crack-pressure specification, mounting configuration, and OEM part number before ordering. Quick release valves are available in multiple port and pressure configurations and are not universally interchangeable.
Cross-Reference Numbers
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WABCO: 973-899-041-0
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WABCO: 9738990410
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Alternate Reference: KN32003
Cross-Reference Note: Cross-reference numbers are provided for identification purposes only. Confirm all specifications and application requirements before purchase.
What’s Included
- One WABCO QR030 quick release valve
- Part number 973-899-041-0 / 9738990410
- Seals and packaging shown in the product photos, when applicable
Only the components shown in the product photos or specifically listed above are included. Air fittings, hoses, mounting hardware, adapters, and additional installation components are not included unless pictured.
Image Disclaimer
Photos may show the actual inventory item or a representative equivalent. New genuine and surplus parts may display minor packaging wear, labels, dust, handling marks, or cosmetic storage wear.
DPX Drivetrain Tools Hub
Need help identifying the correct heavy-duty truck, trailer, air-brake, or drivetrain component? Visit the DPX Drivetrain Tools Hub or call our team for assistance.
Shipping / Location
- Located in Mansfield, Ohio
- In stock and ready to ship
- UPS and FedEx shipping available
- Local pickup available by arrangement
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Warehouse Bin Location: WABCO DPX
Warranty: Sold As-Is, No Warranty.
Heavy-Duty Solutions — Built to Perform.
