ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
Section VI. RADIO INTERFERENCE SUPPRESSION
GENERAL METHODS USED TO ATTAIN PROPER SUPPRESSION
Suppression is attained by providing a low resistance path to ground for stray currents. The methods used include
shielding the ignition and high frequency wires, grounding the frame with bonding straps, and using filtering systems
lNTERFERENCE SUPPRESSION COMPONENTS
Primary, Suppression Components. Primary suppression components are those whose primary function is to
suppress electromagnetic interference.
The primary suppression components on this generator set are the output box access door EMI seal (outer seal),
paragraph 2-18, the load output terminal board EMI filters, paragraph 2-103, and the voltage reconnection terminal board
capacitors, paragraph 4-9.
Secondary Suppression Components. Secondary suppression components have electromagnetic interference
suppression functions which are incidental or secondary to their primary function. The only secondary suppression com-
ponent for the generator set is the housing, refer to Section IX, Maintenance of Housing for removal and installation
Section VII. SPECIAL INSTRUCTIONS
NUCLEAR. BIOLOGICAL. CHEMICAL CONTAMINATION. The generator set is capable of being operated by per-
sonnel wearing nuclear, biological, or chemical (NBC) protective clothing without special tools or support equipment Refer
to FM 3-5, NBC Decontamination for Information on decontamination procedures. Specific procedures for the generator
set are the following:
Control panel indicators sealing gaskets rubber sleeves, rope draw cords at output terminal access ports, con-
trol panel door gaskets, access door gaskets, rubber tubing and belts within the engine compartment, coverings for
electrical conduits, external water drain tubing, and retaining cords for slave receptaclecovers will absorb and retain chem-
ical agents Replacement of these items is the recommended method of decontamination.
Lubricants, fuel, coolant, or battery fluid may be present on the external surfaces of the generator set or compo-
nents due to leaks or normal operation These fluids will absorb NBC agents. The preferred method of decontamination
is removal of these fluids using conventional decontamination methods in accordance with FM 3-5.
Continued decontamination of external generator set surfaces with super-tropical bleach (STB)/ decontaminat-
ing solution number 2 (DS2) will degrade clear plastic indicator coverings to a point where reading indicators will become
impossible This problem will become more evident for soldiers wearing protective masks. Therefore, the use of STB or
DS2 decontaminants in these areas should be minimized. Indicators should be decontaminated with warm soapy water.
External surfaces of the control panel assembly that are marked with painted or stamped lettering will not with-
stand repeated decontamination with STB or DS2 without degradation of this lettering. The recommended method of
decontamination for these areas is warm soapy water.
Areas that will entrap contaminants, making efficient decontamination extremely difficult, include the following:
space behind knobs and switches on the control panel, exposed heads of screws, areas adjacent to and behind exposed
wiring conduits, hinged areas of access doors, spaces behind externally mounted equipment specification data plates,
areas around external oil drain valve, retaining chains for external receptacle covers, areas behind external receptacle
covers, access door locking mechanisms, recessed wells for access door handles, fuel caps, load output terminal board
access door, slave receptacles, frequency adjustment controls, areas around tie-down/lifting rings, crevices around ac-
cessdoors, external screens covering ventilation areas, and areas adjacent to the external fueldrain valve. Replacement
of these items, if available, is the preferred method of decontamination. Conventional decontamination methods should
be used on these areas, while stressing the importance of thoroughness and the probability of some degree of continuing
contact and vapor hazard.