TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
BRAKE SYSTEM - Continued
4. The SYSTEM PARK control vents air pressure from the primary brake circuit and
applies the rear spring brakes. It also supplies air to the trailer supply valve. For
vehicles S/N 100,001 to 199,999 the SYSTEM PARK control is called the PARKING
BRAKE control and functions in the same way.
5. The TRAILER AIR SUPPLY control supplies brake air pressure to a towed vehicle or
trailer.
6. SERVICE gladhand and EMERGENCY gladhand provide the necessary connections to
supply a towed vehicle or trailer with brake air pressure.
0003 00-37
