M2A2 air purifier. The M2A2 air purifier assembly (5) has an M13 particulate filter, an M12A1 gas
filter, and an M1A1 air purifier precleaner in a steel housing. The M12A1 gas filter has a flow of up to
12 cubic feet per minute (0.34 cubic meters per minute). Four outlet sockets are provided for
attaching hoses. When less than four crew members use the unit, one of the airflow sockets is
covered by a control cap without a centerhole. The other sockets, when not in use, are covered with
control caps with a centerhole.
Spring clip. Spring clip (10) covers air holes (11) in the center of the housing during shipment,
storage, when not in use and when the vehicle is being cleaned. During operation, the spring clip
must be removed from the air intake holes by moving it down.
Hose assemblies. Each hose has two coupling halves. One end attaches to the unit and the other
attaches to a protective mask.
Cable assemblies. Four cables are required for each M8A3 filter unit. They connect the filter unit,
switch and circuit breaker to the dome light power receptacle.