AIR SYSTEM (Vehicles S/N 11,438 thru 99,999)

TM 9-2320-391-10

M1078A1 SERIES THEORY OF OPERATION -

0003 00

Continued

AIR SYSTEM (Vehicles S/N 11,438 thru 99,999) Continued

Air pressure in the tires is controlled by the CTIS ECU. The CTIS ECU provides four

tire pressure settings: highway, cross-country, sand, and emergency. Run flat is an

enhance 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.

003 00 41