CHEMICAL-BIOLOGICAL MASK: FIELD M40 IAW TM 3-4240-339-10.

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