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Bendix · Air System
bnx800396
In stock · ships from Knoxville
This is a Bendix TP-5 tractor protection valve, a critical safety component in the air brake system of a semi-truck.
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Other applications
Commonly installed on the tractor chassis or cab. Always verify port sizes and types (PTC vs. NPT) match your existing plumbing before replacing.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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Its main job is to protect the tractor's air supply if the trailer breaks away or a major air leak develops, automatically isolating the tractor brakes so you can still stop. It also controls the flow of air to the trailer, allowing the driver to apply the trailer brakes independently using the hand valve. You would typically replace this valve if it's leaking air, not allowing the trailer brakes to apply or release properly, or failing an air brake safety test.
Part Number: bnx800396
tractor protection valve
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
