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Haldex · Air System
HDXKN28600A
In stock · ships from Knoxville
The Haldex FF2 Full Function Trailer Valve (part number HDXKN28600A) is an all-in-one air control valve for trailer spring brake systems.
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Verified fitment for 6 applications
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All confirmed applications for this part number.
Other applications
Other applications
Fits a wide range of semi-trailers with spring brake chambers. The exact HDXKN28600A suffix may represent a distributor-specific packaging or revision; the core valve is the well-documented Haldex KN28600/FF2.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 12 of 12.
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It manages air flow to the spring brakes and service brakes, offering built-in pressure protection, anti-compounding, service brake priority, and quick-release functions. Replacing this valve is typically needed when the original valve is leaking, sticking, or fails to meet FMVSS-121 standards, often due to corrosion or internal wear.
Part Number: HDXKN28600A
HALDEX VALVE FF2
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
