REPLACE M3 NBC HEATERS AND CONTROLLERS (M113A3 ONLY) Continued
Before installing drivers station heater, make sure both end adapters are adjusted for routing
the hose under the welded bracket and toward the roadside hull. If installing a new heater,
remove the controller portion from the heater and adjust the adapters for routing.
To insure a good electrical ground, remove paint from around mounting hole. Install toothed
washer against surface where paint was removed, then ground lead terminal. The longer screw
is where the combined ground leads are secured. Do not include both ends of the drivers
heaters ground lead terminal to the same location.
If installing a new heater, disassemble the controller from the heater body. Discard the hardware securing the controller
to the heater and use the hardware listed in TM 9-2350-277-24P for securing the controller.
Install two screws (22), four washers (24), two lockwashers (26), two nuts (27), and drivers heater (4) on welded mount.
Install screw (22), ground lead terminal (23), new lockwasher (26), washer (24), new lock washer (26), and nut (27)
securing the drivers heater (4) on welded mount.
Install the longer screw (22), three ground lead terminals (23), new lock washer (26), washer (24), new lockwasher (26),
and nut (27) securing the drivers heater (4) on welded mount.
Install drivers outlet hose (20) and drivers inlet hose (21) on drivers heater (4) and tighten clamps (19).
If removed, install two screws (14), new lockwashers (15), washers (16), bracket (13) on bulkhead.
Install four screws (10), four new lockwashers (10), four washers (12), one ground lead terminal (6), one new lockwasher
(11) as shown in the art, and drivers controller (2) on bracket (13).
Connect two leads (3) to drivers controller (2) and drivers heater (4).
Connect lead 537B (1) to drivers controller (2).