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Knox Trailers · Air System
MAS-5223
In stock · ships from Knoxville
The PAI MAS-5223 is an air control valve (often labeled 'Airco Valve') engineered for Mack truck pneumatic systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It typically functions as a toggle switch that manages compressed air flow to components such as suspension dump valves or differential locks. When this valve fails, drivers may experience air leaks or unresponsive air-operated controls; replacing it restores proper system operation. The unit is designed to replace Mack OEM number 20QE2360, though exact technical specs were not confirmed in available documentation.
Part Number: MAS-5223
AIRCO VALVE, MAK20QE2360
Unit: ea
Dealer: Knox Trailers
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Parts commonly needed alongside air system
