OPERATE NBC AIR FILTER SYSTEM (M548A3) Continued
Under arctic conditions, danger of frostbite exists. Put on protective mask, but do not connect
filtered air hose breakaway socket to protective mask canister unless carrier interior
temperature is above 20
Typically the M548A3 will have only four NBC stations. However, M548A3 vehicles converted
from M730 vehicles, may have five NBC stations.
Pull down sharply to remove air hose from orifice connector assembly. Hold your hand over air hose and feel if air flow
is warm. If air is too cold to breathe safely, turn heater control knob to right (clockwise).