MAINTENANCE OF M939 SERIES VEHICLES - OD1661 - LESSON 1/TASK 1
COMPRESSED AIR AND BRAKE
(6) Secondary Air Reservoir.
Stores air pressure so that if
constant pressure system fails or the engine stalls, the operator can
make normal brake application before running out of air.
(7) Reservoir Draincocks.
Provides a drain for moisture and air
(8) Primary Air System Shutoff Valve. When closed, the valve will
isolate the primary system and maintain air pressure to enable the
operator to slow or stop the vehicle. For emergency only.