Side Voicemitter o loose lock ring o missing gasket o reversed voicemitter (four bee bees faced outward) 1 Lens o broken o cracked o scratched o discolored.

Side Voicemittero loose lock ringo missing gasketo reversed voicemitter(four bee bees faced outward)

1

Lenso brokeno crackedo scratchedo discolored

Drink TubeQuick Disconnect

o cloggingo leaking(see manual)

Canister and Porto damaged canistero loose canistero inlet valve body improperly installed/missing

Internal Drink Tubeo coupling sheared offo drinking tube missing

Outlet Valve Outlet Valve Seato damagedo dirtyo missing

o corrodedo damagedo dirty

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Front Voicemittero loose retainer

2

Operator’s Manuals Operator’s Manuals

M40A1/M40A2:TM 3-4240-346-10 (Aug 98)

M42A1:TM 3-4240-340-10 (Feb 94)

M40A1/M42A2TM 3-4240-346-23& (Aug 10)

M41 PATSTM 3-4240-349-12&P (Nov 99))

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Field Manuals Field Manuals

CBRN Protection:FM 3-14.4 (Jun 03)

CBRN Decontamination:FM 3-11.5 (Apr 06)

SMCT Warrior Skills Level 1STP 21-1 (Dec 06)

SMCT Warrior Skills Level 2-4 STP 21-1 (Sep 08)

3

For clarity, the operator may elect to explain the next test to the individual just beforethe Soldier must accomplish it (i.e., during exercise one explain that exercisetwo requires deep breathing (in through the nose and out through the mouth)).

Exercise 1: Normal breathing, keeping the head motionless. Exercise 2: Deep breathing, slowly but deeply inhaling through nose and exhalingfrom mouth. Exercise 3: Head movement side to side, looking over each shoulder in one-secondintervals. Ensure the canister does not touch shoulders while performing this exercise. Exercise 4: Ensure the canister does not touch chin while performing this exercise.Head movement up and down, looking at ceiling then floor in one-second intervals. Exercise 5: Rotate chin, moving the jaw in a circular pattern with mouth slightlyopen.

NOTEAfter the fifth exercise, you will hear a series of three beeps. An overall test result will then be displayed.

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M41 PATS 99.5% Pure Reagent Grade Isopropyl Alcohol: NSN 6810-01-382-2904 4

o Ensure lens are facing outwardo Never store a mask wet; air dry

Left-handed Storage Left-handed Storage Right-handed Storage Right-handed Storage

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Outlet Valve Body

o Remove any dirt.o Outlet valve body sealing surface should be smooth; feel for irregularities with fingernail.o Mask is unserviceable if damaged.

Outlet Valve Disc

o Remove any foreign objects from disc (i.e. dirt, sand, or hair).o Replace disc if damaged.

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Inspect facepiece for cuts or holes.

o Most commonly found inside the facepiece next to the internal drink tube.o Caused by improper storage in the carrier.o Mask is unserviceable if cuts or holes exist.

You Fold It…

You Break It!

Replace the head harness under the following conditions: When it does not hold the mask assembly firmly against your face. When it is cut, torn, or frayed. When it has missing buckles or tabs. When it is deteriorated or stretched out.

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(NS

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Front Voicemitter Front Voicemitter

Side Voicemitter Side Voicemitter

(Use the Carrier’s “D”Ring To Tighten)

Check Tightness by Hand.(Turn Clockwise- if it is loose,

the mask is unserviceable)

Canister Canister

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(Hand Tight)

o Perform maintenance according to technical manuals.o Use waterproof bag when requiredo Clean according to manualso Use your outserts.o Keep your mask clean.o Ensure your second skin is attached.o Replace worn out parts.

9

o Keep drinking system clear- ONLY DRINK WATER.o Fitted with M41 PATS.o Reference the TM every time.o Make sure you never store food in your mask carrier. o Use as a pillow.o Only perform 10 Level maintenance.

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10

o Sit or lay on the mask/carrier.o Remove side voicemitter assembly unless necessary.o Fold mask.o Store your mask when any of its parts are wet.o Dent the canister.o DO NOT PREFORM MAINTENANCE PAST 10 LEVEL.

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