TM 9-2320-365-34-11-19. AIR SYSTEMFigure 1-19. Air SystemThe air system provides clean, dry air for use in the air brake system and the Central Tire Inflation System (CTIS). Theair system is pressurized by an engine driven air compressor (1, Figure 1-19) with a nominal output pressure of 125psi (862 kPa). The system pressure is controlled by an unloading type pressure governor (2) which maintains theoutput pressure between 105 psi (724 kPa) and 125 psi (862 kPa). Air is supplied to the air brake portion of the airsystem from the primary and secondary air tanks. Air for the CTIS comes from the wet tank (3) and is supplied to theaxles by the CTIS manifold valve (4). Air pressure in the tires is controlled by the CTIS Electronic Control Unit (ECU)(5). The CTIS ECU provides for four tire pressure settings.1-26 Change 1
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