TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
AIR SYSTEM (Vehicles S/N 11,438 to 99,999) - Continued
3. Air pressure in the tires is controlled by the CTIS ECU. The CTIS ECU provides for
four tire pressure settings: highway, cross-country, sand, and emergency. Run Flat is
an enhanced mode used in all four modes. Kneeling valves on the front tires allow
the front of the vehicle to be lowered for internal air transport (C-130 and
C-141). Air pressure is also used to keep the cab level through the use of air springs,
mounted below the rear cab support, and a cab leveling valve.
0003 00-49
