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PAI Industries · Air System
LRV-3401
In stock · ships from Knoxville
This is an R-12DC relay valve for heavy-duty truck air brake systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
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All confirmed applications for this part number.
Mack Trucks
Mack Trucks
Verified as a direct replacement for the Mack 800481 relay valve. Exact truck models not confirmed in sources, but fits Mack applications that call for the R-12DC with the configuration listed in the cross references.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 7 of 7.
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It uses a small signal pressure from the foot valve to rapidly apply and release air to the brake chambers, speeding up brake response on longer wheelbase vehicles. You typically replace it when the valve fails, causing slow brake apply/release, air leaks, or inconsistent braking. PAI's LRV-3401 is an aftermarket equivalent to original Bendix and Mack valves like the Mack 800481.
Part Number: LRV-3401
R-12DC RELAY VALVE 800481
Vendor: PAI Industries
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside air system
