TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
BRAKE SYSTEM (Vehicles S/N 11,438 to 18,549)- Continued
1. The air compressor supplies approximately 120 psi (827 kPa) to the air dryer.
2. The air dryer contains a heating element and a desiccant cartridge to remove
moisture from the air before it is delivered to the primary air tank and secondary air
tank.
3. The foot control valve receives pressurized air from both the primary and secondary
air tanks. The foot control valve is a two circuit design, with one set of ports directing
air to the front brakes from the secondary air tank and a second set of ports directing
air to the rear brakes from the primary air tank. The plumbing between the primary
and secondary air tanks is designed to allow controlled braking in the event of a
failure in the primary (rear brakes) or secondary (front brakes) brake circuit. When
brake air pressure falls below a preset limit, pressurized air from the wet tank,
normally used for the CTIS, fan solenoid, and differential lock solenoid, is redirected
to the primary brake circuit.
0003 00-34
