ARMY TM 9-5115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
SECTION VI. RADIO INTERFERENCE SUPPRESSION
2-7 GENERAL MEHTODS USED TO ATTAIN PROPFR 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 trending straps, and using filtering systems.
2-8 INTERFERENCE SUPPRESSION COMPONENTS.
2-8.1 Primary Suppression Components.
The primary suppression components are those whose primary function
is to suppress radio interference. The only primary suppression components on this generator set are the load output
terminal board EMI filters. Refer to paragraph 2-97 for inspection and replacement procedures.
2-8. 2 Secondary Suppression Components. Secondary suppression components have radio interference suppres-
sion functions which are incidental or secondary to their primary function. The only secondary suppression component
for this generator set is the housing. Refer to SECTION IX for removal and installation procedures.
SECTION VII. SPECIAL INSTRUCTIONS
2-9
NUCLEAR, BIOLOGICAL, AND CHEMICAL CONTAMINATION.
The generator set is capable of being operated by personnel wearing nuclear, biological, or chemical (NBC) protective
clothing without special tools or support equipment. Refer to FM 3-5, NBC Decontamination for information on decontami-
nation procedures. Specific procedures for the generator set are the following:
2-9.1
Control panel indicators sealing gaskets, rubber sleeves and rope draw cords at output terminal access ports,
control 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 receptacle covers will absorb and retain
chemical agents. Replacement of these items is the recommended method of decontamination.
2-9.2
Lubricants, fuel, coolant, or battery fluid maybe 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.
2–9.3
Continued decontamination of external generator set surfaces with supertropical bleach (STB) or 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. The use of STB or DS2 decon-
taminants in these areas should be minimized. Indicators should be decontaminated with warm, soapy water.
2-9.4
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 de-
contamination for these areas is warm, soapy water.
2-9.5
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-
cess doors, external screens covering ventilation areas, and areas adjacent to the external fuel drain 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.
2-9.6
In an NBC contaminated environment, the generator set should be operated with all access doors closed to
reduce the effects of contamination.
2-9.7
The use of overhead shelters or chemical protective covers is recommended as an additional means of protec-
tion against contamination in accordance with FM 3-5. If using covers, care should be taken to provide adequate space
for air flow and exhaust, refer to FIGURE 2-1.
2-9.8 (A) For additionaI NBC information refer to FM 3-3 and 3-4. All other services will use their applicable directives.
2-25
