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CHEMICAL-BIOLOGICAL MASK: FIELD M40
IAW TM 3-4240-339-10
CHEMICAL-BIOLOGICAL MASK: FIELD M40
CHARACTERISTICS
CAPABILITIES
FEATURES
PMCS
BATTLE DRESS OVERGARMENTS
CHARACTERISTICS
LIGHTWEIGHT
TRANSPORTED AND STORED IN CARRIER
FACEPIECE IS MADE OF SILICONE RUBBER WITH INTURNED SEALING SURFACE SO IT CAN FORM A SEAL ON YOUR FACE
SECOND SKIN FOR ADDITIONAL PROTECTION FROM LIQUID AGENTS (M40A1 ONLY)
QUICK DOFF HOOD FOR EASY DONNING OPERATION (M40A1 ONLY)
INCLUDES BOTH CLEAR AND NEUTRAL GRAY OUTSERTS
CANISTER QUICKLY AND EASILY REPLACED
CAPABILITIES
WHEN WORN WITH PROPER CANISTER INSTALLED, THE FACEPIECE PROTECTS FACE, EYES AND LUNGS FROM CONCENTRATIONS OF CHEMICAL-BIOLOGICAL (CB) AGENTS, TOXINS AND RADIOACTIVE FALLOUT PARTICLES. THE CANISTER MAY BE INSTALLED ON EITHER SIDE OF THE FACEPIECE
FEATURES
FACE PIECE: Provides a sealAgainst CB agents
HEADHARNESS: Consists of Head pad, forehead straps , templeStraps, cheek straps, and donningtab
INLET VALVE DISK:allows filtered air to enterthe face piece and preventsmoist exhaled air from enter-ing canister
NOSECUP VALVE DISK:allows filtered air to enterNose cup and prevent moistexhaled air from foggingEye lenses in cold weather
OUTLET VALVE DISK/COVER:releases exhaled air and pre-vents unfiltered air from enter-ing face piece
AIRFLOW DEFLECTOR:Directs inhaled air over eye-Lenses to prevent fogging
FRONT/SIDE VOICEMITTER:Transmit your voice outside the face-piece
CANNISTER:Filters out CB agentAnd other particlesFrom contaminated air
INTERNAL/EXTERNAL DRINK TUBE:Allows operator to drink while wearing thefacepiece
D D
O
CARRIER: Provides forstorage and carrying of mask.Shoulder strap, waiststrap, short strap, adjust-able strap
OUTSERTS: Fit overface piece eyelense rings to secure outserts to face pieceNeutral gray: reduces sun glare
HOOD: Rubber coatedfabric which protects neck and areas of head not coveredby your mask against CB agents
WATERPROOF BAG: Keeps mask drywhen required by climate and mission
PMCS
• WHY IS IT IMPORTANT?
Item Interval ITEM TO BE INSPECTED NMCB A W
1
Remove filter canister. Check Canister for cracks, dents or holes.
Check air intake to make sure it isNot clogged with dirt.
Canister isCracked orDented over¼ deep orDamaged on A seam, orHas holes.
Canister.
X X
X X
Check for damaged threads on canister
Threads areDamaged
Loose particlesRattle or dustFalls outShake canister and listen for loose
particles
x x
x x
Item Interval ITEM TO BE INSPECTED NMCB A W
2 . Eye lenses, Eye rings, Outserts
X X
x x
x x
Check eye lenses for cracks, cutsScratches, or discoloration
Check eye rings for corrosion
Check both set of outserts for chipsCracks or discoloration that affectvision
Eye lenses areCracked or cut
Eye rings areBent or corroded
Outserts areBroken orDistorted enoughTo affect vision
Item Interval ITEM TO BE INSPECTED NMCB A W
3 . Hood.
X X
x x
x x
Caution: When examining hood, avoidOpen flame and exposed light bulbs
Check for cuts, holes or tears
Sticky or gummy area, Peeled or worn coating
Hood has morethan two pinholes, cuts,holes or tears
Fabric is stickyor gummy
Fabric is peel-ing or worn
Straps or cordmissing, zipperis torn or broken
Check straps, zipper
Item Interval ITEM TO BE INSPECTED NMCB A W
4 . Face piece.
X X
x x
x x
Visually inspect inside surface fordirt,Mud, and greasy oily substance
Check for holes, tears by holdingIn front of light
Check silicone rubber next to Eye lenses to ensure they will notPull away from face piece
Face piece isdirty
Silicone rubberhas holes, tears, which will allow airto enter
Eye lenses orhousing pullsaway fromface piece
Item Interval ITEM TO BE INSPECTED NMCB A W
5 . Head harness.
x x Check for elasticity, Check strapsFor cut, tears or deterioration
Head harnessWill not holdFace pieceAgainst face
Harness is cutTorn or frayed
Item Interval ITEM TO BE INSPECTED NMCB A W
6 . Buckles.
X X
x x
Check for bends, cracks or Corrosion
Check for missing or brokenbuckles
Buckles areBent, crackedOr will not holdStraps
Buckles areMissing orbroken
Item Interval ITEM TO BE INSPECTED NMCB A W
7 . Outlet valve disk.
x x
Check to see if outlet valve disks are present
Check for nicks, tears or rips. Wipe off moisture
Outlet valveDisk is missing
Outlet valveDisk is nickedTorn, ripped,Or will notSeat properly
xx
Item Interval ITEM TO BE INSPECTED NMCB A W
8 . Internal/External Drink Tube.
x x
x x
Check that both tubes are present.
Check internal tube for alignment
Check external tube for solidconnections
xx
Either tube isMissing orCracked
Internal tubeMisaligned
External tubeConnectionloose
Item Interval ITEM TO BE INSPECTED NMCB A W
9 . Airflow Defector.
X X
x x
Check that deflector is securelyMounted and that flanges are inThe holes
Check mounting holes for cuts ortears
Deflector notMounted Correctly
Mounting holesAre cut or torn
Item Interval ITEM TO BE INSPECTED NMCB A W
10 . Inlet Valve.
x x
x x
Check that valve disk is present andProperly mounted
Check for cuts, holes or tears
Inlet valve Disk missing
Valve disk isTorn or cut
Item Interval ITEM TO BE INSPECTED NMCB A W
11 . Nose cup Assembly.
X X
x x
Check for disk.
Check that nose cup is not pulledAway from back of front voice-mitter
Nose cup diskAre missing
Nose cup Pulled awayFrom front Voicemitter housing
Item Interval ITEM TO BE INSPECTED NMCB A W
12 . Voicemitters.
x x
x x
Check retaining rings for corrosion,or cracks
Check for dents or punctures. Makesure the four beads in the center of the voicemitter is facing outward
Retaining ringsCorroded or Cracked
VoicemitterDented orInstalled back-wards
Item Interval ITEM TO BE INSPECTED NMCB A W
13 . Carrier.
x x
D D
O
Check for torn straps or missinghardware. Check for cleanliness, and mildew
Carrier isDirty. StrapsAre torn or Hardware isMissing
Mildew is present
Item Interval ITEM TO BE INSPECTED NMCB A W
14 . Waterproof Bag.
X X Check bag for tears, holes andcracks
Bag is Torn or hasholes
Item Interval ITEM TO BE INSPECTED NMCB A W
17 . Second Skin.
X X
x x
Check second for cuts, holes orTears
Check for dirt or greasy or oilysubstances
Second skinIs dirty
Second skinHas tears orSplits larger Than ¼ lengthOr diameter
PROTECTIVE GEAR
The BDO is a camouflage colored, woodland or desert two piece garment consisting of one coat and one pair of trousers. The BDO provides protection against chemical agent vapors, liquid droplets, biological agents, toxins, and radioactive alpha and beta particles. When remove from its vapor barrier bag it lasts for a minimum of 30 days. The wear time may be extended by the Commander. The key to its effectiveness is its serviceability. Upon exposure, it provides 24 hours of protection.
.
WITH PROTECTIVE GEAR
WITHOUT PROTECTIVE GEAR
SUMMARY
CHARACTERISTICS
CAPABILITIES
FEATURES
PMCS
BATTLE DRESS OVERGARMENTS
QUESTIONS