REPLACE NBC M3 HEATER AND ADAPTER (M548A3) Continued
NBC agents can kill you. Do not service air cleaner or vent system after NBC attack until
carrier has been decontaminated and filters disposed of by NBC team. Unit commander or
officer in charge must assign NBC team to decontaminate system and dispose of filters. Unit
commander or officer in charge must prescribe necessary protective clothing and safety
measures for NBC team.
All five M3 heaters and adapters are removed the same way. If your carrier was converted from
a M730A2, it may have five heaters, otherwise the M548A3 will have only four heaters.
Remove clamp (1) and hose (2) from outlet adapter (3).
Remove clamp (4) and hose (5) from inlet adapter (6).
Disconnect electrical lead (7) of wiring harness from M3 heater lead (8).
Remove four lock nuts (9), lock washers (10), screws (11), and M3 heater (12) from manifold (13). Discard lock nuts
and lock washers.
Remove inlet adapter (6) and outlet adapter (3) from M3 heater (12).