c4 mask nbc manual

8/17/2019 C4 Mask NBC Manual

1/36

I I

ational Defense C-n-267-000/MB-OOO

Defence nationale

OPERATOR S

INSTRUCTIONS

C4 MASK

NBC

NSN 4240-21-906-0613 EXTRA

SMALL}

NSN

4240-21-906-0614

(SMALL}

NSN 4240-21-906-0615 (MEDIUM)

NSN 4240-21-906-0616 (LARGE)

NSN 4240-21-908-1096 GENERIC

(Olive

Drab)

BILINGUAL)

INSTRUCTIONS DE L OPERATEUR

MASQUE

C4

NBC

NNO 4240-21-906-0613 (TRES PETIT)

NNO

4240-21-906-0614

(PETIT)

NNO 4240-21-906-0615

(MOYEN)

NNO 4240-21-906-0616 (G,RA,ND)

NNO

4240-21-908-1096

GENERIQUE

(Olive

Terne)

BILINGUE)

Issued

on authority

of

the Chief

of

the

Defence

Staff

Publiee avec l autoriaation

du

Chef

d etat-major

de la Defense

OPI:

DACMES

BPR: DMVMG 5

Canada

1993 11 30


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77 267 000/MB OOO

LIST OF EFFECTIVE P GES

Insert latest changed pages; dispose of superseded

pages n accordance with applicable orders.

NOTE

The portion of the text affected by the latest

change is indicated by a black vertical line

n

the margin of the page. Changes to

il-

lustrations are indicated by miniature point-

ing hands or black vertical lines.

Dates of issue for original and changed pages are:

Original O 1993 11 30

Change 1

Change 2

Change 3

Change 4

Change 5

A


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Zero in

Change

No. Column indicates an original

page

......_

The

use

of

the

letter E

or

F indicates

the change

is in

English

or French

only. Total

number of

pages in this

publication is 67 consisting of the following:

Page No. Change No.

Title

0

A

to D/E

0

i

to

vii/viii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O

1 1

to

1 11 / 1 1 2 . . . . . . . . . . . . . . . . . . . . . . . . . O

2 1

to

2 21/2 22 O

3 1

to 3 23/3 24

. . . . . . . . . . . . . . . . . . . . . . . . . O

Contact

Officer: OACME 5 5 2

©1993

ONO

Canada

c


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TABLE OF CONTENTS

TABLE

ES

M T l l ~ R E S


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CONTENTS

PAGE

PART 1

GENER L

DESCRIPTION . • • • • • • • • 1 1

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6

Ancillary Equipment . . . . . . . . . . . . . . . . . . . . . . . 1 10

PART 2 PREPARATION FOR USE • • . • • • • • •

2 1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2

Mask Fitting and Testing . . . . . . . . . . . . . . . . . . . . 2 2

Changing the Canister from one Side

to the Other . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4

STEM VALVES REPLACEMENT

PROCEDURES . . . . . . . . . . . . . . . . . . . . . . 2 12

Removal 2 12

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 16

NOSECUP BLANKING PLUG

REPLACEMENT/RELOCATING

PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . 2 16

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 16

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 18

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CONTENTS Cont)

PAGE

PART 3 - OPERATING PROCEDURES 3 1

Donning the Mask . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2

Using the Drinking Device . . . . . . . . . . . . . . . . . . . 3 4

Maintenance of the Mask 3 8

Hints for Mask Wearers . . . . . . . . . . . . . . . . . . . . 3 18

Operating in Cold Weather . . . . . . . . . . . . . . . . . 3 20

Sandy or Dusty Environment 3 20

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C-77-267-000/MB-OOO

LIST OF FIGURES

FIGURE TITLE

P GE

1 1

C4 Mask NBC - General View . . . . . . . 1-4

2 1

C4 Mask Airflow . . . . . . . . . . . . . . . . . . . . 2-8

2-2 Valve Location - Removal and

Installation 2-14

2-3 Nosecup Blanking Plug -

Relocating/Removal and

Installation . . . . . . . . . . . . . . . . . . . . . . 2-20

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8 000

PART 1

GENERAL DESCRIPTION

PARTIE 1

DESCRIPTION GENERALE

1 1


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C-77 267-000/M8 000

PURPOSE

PART1

GENERAL DESCRIPTION

WARNING

The Mask when equipped with the NBC

canister is not designed to replace oxygen

and will not protect against carbon monox

ide and ammonia fumes. It shall not be used

during fire fighting or as protection against

paint or dope-spraying fumes.

1 The C4 Mask NBC see Figure 1-1 and NBC

canister provide protection to the eyes nose throat

lungs and facial skin against the ingestion of field con

centrations of military chemical-biological warfare

agents screening smoke riot-control agents and ra

dio-active particles.

1 2


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C-77 267 -000/M8 000

REAR VIEW**

SIDE SPEECH TAANSMITl ER*

2 SIZE IDENTIACATION

3. EYEPIECE

4 FRONT SPEECH TRANSMITTER

5

SIDE CANISTER MOUNT

6

OUTLET VALVE COVER

7.

DRINKING DEVICE ELBOW

8.

NOSECUP

9

FACEPIECE

1 HEADHARNESS

11

ADJUSTEMENT STRAPS

12. TAB

13

DRINKING DEVICE

14

LUGS

6 TOTAL)

15

RE-ENTRY SEAL

16 MOUTHPIECE

17

DRINKING DEVICE HOLDER

INTERCHANGEABLE (RIGHT OR LEFn

NOSECUP ASSY AND HEADHARNESS ASSY NOT SHOWN

Figure

1-1

C4 Mask, NBC - General View

1-4


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C-77-267-000/MB-OOO

DESCRIPTION

2

The major components of the NBC kit are: the

C Mask,

NBC

protective; filter Canister with NATO

standard thread); Carrier; Carrier carrying Straps; and

Ancillary equipment.

a.

The

Mask has a silicone rubber

nosecup

{8),

see Figure 1-1, a bromobutyl facepiece 9)

with a re-entry seal 15), two polycarbonate

eyepieces 3), a front 4) and side 1) speech

transmitter, an outlet valve with cover 6), an

elasticized mesh headharness 10) with two

adjustable straps 11) and six lugs 14).

b. The Mask is also equipped with a drinking de

vice 13) which permits the drinking of water

from a water bottle, with a connector cap, with

out removing the Mask.

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C-77-267

-000/MB-OOO

• CAUTION •

Use of the drinking device for other than

cle n w terwill

leadtotheformation of fun

gus or other disease-causing bacteria. If

other fluids are allowed into the drinking

tube, clean and disinfect in accordance with

PART 3.

c. The Mask has a left and a right side mount 5)

which allows the Canister and side speech

transmitter 1) to be interchanged.

d. The Carrier is a rugged, agent resistant fabric

bag, designed to provide storage for the Mask

and Canister and to keep dirt and moisture

from the Mask, a dirty Mask is uncomfortable

and its performance may be reduced). A de

tachable and adjustable carrying strap set is

provided to allow the Carrier to be worn by the

individual. Velcro loops and plastic hooks on

the Carrier can be used to secure the strap set

or to attach the Carrier directly to the combat

webbing. Pockets on the outside of the bag

provide for storage of the Ancillary equipment.

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C-77-267-000/MB-OOO

NCILL RY EQUIPMENT

3. Whenever issued, Ancillary equipment, in the

quantities as outlined in the Equipment

heck

List

L-77-267-000/LC-OOO,

is

stowed in the carrier as fol

lows:

a.

Large Pocket.

1) Chemical agent detector paper.

2) Decontamination mitts.

3) RSDL

sachets.

4)

Nerve agent vapor detectors NAVO).

5) Pyridostigmine bromide tablets.

b. Small Pocket.

1) Nerve agent antidote injectors.

2) Anti-convulsant injectors.

c.

Underside pocket.

1)

Spare canister.

2) Plastic conversion tool.

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C-77-267-000/M B-000

PART

PREPARATION FOR USE

PARTIE 2

PREPARATIFS D EMPLOI

2 1


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C-77-267-000/MB-OOO

GENERAL

PART

PREPARATION FOR USE

1

To

ensure an air-tight and comfortable fit, the

correct size Mask must

be

selected, properly fitted,

and the headharness correctly adjusted. The correct

size should be established using the

C4

mask sizing

tool. The Mask

is

available in four sizes: extra small,

small, medium and large. When first issued, and peri

odically thereafter to confim the fit, the donned mask

shall be tested for air-tightness using the protective

mask leak detecting kit, or by going through the gas

hut.

MASK FITTING AND TESTING

2 When the mask is properly donned and the

headharness correctly adjusted, the wearer s eyes

should be located in the upper one-third

of

the eye

pieces. If the eyes are located too high or too low in the

eyepieces, exchange the Mask for a larger or smaller

size accordingly.

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C-77-267-000/MB-OOO

3. To test for air-tightness of the face-seal, proceed

... ...

as follows:

.......

a. Block the canister intake with the palm of your

hand, inhale, and hold breath for 5-10 se

conds. The Mask should collapse onto the

face and remain collapsed. If the Mask returns

to its normal shape, a leak is present. Remove

and redon the mask. Ensure it is positioned

and adjusted properly and there is no hair un

der the face-seal. Retest. If the Mask still

leaks, replace it with a new one.

b.

Whenever possible, a confidence test should

be performed using the Protective Mask Fit

Test Kit as per instructions inside cover of the

metal box), or CS gas hut.

CHANGING THE CANISTER FROM ONE SIDE TO

THE OTHER

4.

Under the supervision of NBC trained, or desig-

nated maintenance personnel:

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C-77-267-000/MB-OOO

a.

Remove the Canister by turning t counter-

clockwise, see Figure 2-1.

b. Remove the blue inlet valve, see Stem Valve

Replacement Procedures, paragraph

5.

c. Remove the side speech transmitter assem

bly by:

1) Using the plastic conversion tool, remove

the plastic retaining ring by turning it count

er-clockwise).

2)

Carefully removing the side speech trans

mitter assembly if difficult to remove, tap

the side mount against one hand to dis

lodge the assembly).

WARNING

I

Ensure that the rubber washers remain in

the side mounts whenever the Canister

and/or side speech transmitter is/are re

moved.

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C-77-267-000/MB-OOO

RIGHT SIDE

LEFT SIDE

RUBBER

~ W S H E R

\ ~ a N

•BLUEl f?)

ALVE NLET

\

CANISTER

*

INTERCHANGEABLE RIGHT OR LEFl)

Figure

2 1

C4

Mask Airflow

2-8


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77 267-000/MB-OOO

d. Install the side speech transmitter assembly

into the opposite side mount, ensuring the vis-

ible amber membrane

is

to the inside of the

Mask.

NOT

If the protector/cover of the assembly sepa

rate when removed, re-assemble and en

sure that the recessed side with the three

raised center bosses) is next to the speech

transmitter body.

e Replace the retaining ring by turning it clock

wise and tighten using the conversion tool do

not over-tighten; this may strip the thread).

f

Install the blue stem valve

in

the inlet mount

from the inside of the mask so that the stem

protrudes outward through the mount center

hole, see Stem Valve Replacement Proce

dures, paragraph

5

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77-267-000/MB-OOO

g. Exchange position of the nosecup black

blanking plug see Nosecup Blanking Plug -

i4

Relocating/Replacement Procedures para

graph

7

and the nosecup grey inlet valve see

Stem Valve Replacement Procedures para

graph 5.

NOTE

Ensure the nosecup grey inlet valve is posi

tioned such that the valve is

on

the inside of

the nosecup to allow the air to flow inward

see Figure 2-1.

h.

Install the canister. Ensure that the threads are

properly engaged then screw into the side

mount until firmly seated against the rubber

washer. Do not over-thighten.

STEM VALVES REPLACEMENT

PROCEDURES

REMOVAL

5

Proceed

as

follows:

2-12


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C-77-267-000/MB-OOO

a Locate the appropriate valve inside the a s k ~

see Figure 2-2 step 1.

b

Grasp the valve with your fingers and pull it

free see step 2

LEFT SIDE

STEP 1

RI HT£

STEP

NOSECUP

GREY

N L m ~

TEP3

Figure 2-2 Valve Location - Removal and Installation

NOT

Ensure that there are no parts of the valve

remaining in the side mount or the nosecup.

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C-77-267-000/MB-OOO

INSTALLATION

6.

Proceed as follows:

a. Wet the stern of the valve.

b.

Insert the stern through the center hole of the

appropriate mount see step 3 in the opposite

direction to the air flow see Figure 2-1 and

pull the stern until the collar is pulled through

the hole.

NOTE

Ensure the valve is properly seated on the

mount.

NOSECUP BLANKING PLUG

REPLACEMENT RELOCATING PROCEDURE

REMOVAL

7.

Proceed as follows:

a. Pull/push the blanking plug from the nosecup

see Figure 2-3 step 1.

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INSTALLATION

8. Proceed as follows:

a. Insert plug through the opposite if applicable)

nosecup mount, see step 2 such as the flat

surface is on the outside.

b Stretch the nosecup over the shoulders of the

plug .

• CAUTION •

Be careful not to damage the nosecup or

dislodge it from the outlet valve mount.

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STEP 1

STEP

Figure 2 3 Nosecup Blanking Plug Relocating/

Removal and Installation

2 20


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PART

OPERATING PROCEDURES

PARTIE 3

METHODES D UTILISATION

3 1


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C-77-267-000/MB-OOO

PART

OPERATING PROCEDURES

DONNING THE

MASK

1

The donning procedure is as follows:

a

Hold your breath.

b

Close your eyes.

c

Remove headgear.

d. Insert your chin in the Mask chin-cup and pull

headharness over head.

e Grasp the tab at the back of the headharness

and pull downward.

f

l ighten the two bottom adjustment straps but

do not over-tighten.

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C-77-267 000/MB OOO

USING THE DRINKING DEVICE

2. The procedure for drinking water with the drink-

ing device is as follows:

a. Insert the drinking device into the canteen

connector cap press firmly to ensure a proper

seal).

b. Grasp the mouthpiece with your teeth. To as

sist in locating the mouthpiece, place thumb

between the facepiece and the elbow of the

drinking assembly and lever it outward until

the mouthpiece can be grasped

• • • • • • •

• CAUTION •

Maneuver the elbow carefully so as not to

break the seal of the facepiece to the face.

c. Raise the water bottle and squeeze, the water

will then flow through the mouthpiece.

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C-77-267-000/MB-OOO

d. Periodically you must force air into the water ~

bottle by blowing into it or lowering it

to

reduce

the vacuum that is created.

e

When

finished, blow through

the

mouthpiece

to clear water from quick-disconnect, then dis

connect the drinking device and return it to the

holder on the chin of the facepiece.

3

Cleaning the

Drinking

Device Mask Doffed).

The drinking device shall be cleaned as follows:

a

Fill a water bottle with a solution of two parts

detergent washing detergent or equivalent)

to 100 parts water, at a temperature of 20-40

degrees Celsius.

b With the cap secured to the water bottle, insert

the

drinking device into the cap.

c Flush the solution through the drinking device,

with the inside of the Mask facing downward.

d

Remove drinking device from the cap of the

water bottle.

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77-267-000/MB-OOO

e. Fill water bottle with clean water. Repeat para-

graphs

b

c

and

d.

f. Fill water bottle with a solution of two parts

Dettol or equivalent) to 100 parts water, at a

temperature of 20-40 degrees Celsius. Re

peat paragraphs

b

c and d.

g. Rinse water bottle thoroughly with fresh water

then repeat paragraph e .

• C UTION •

These instructions assume that correct pro

cedures have been followed for the use of

the drinking device. If any fluids other than

fresh drinking water have been consumed

through the drinking device, it must be

flushed with clean water immediately there

after to avoid a residual bacteriological haz

ard.

M INTEN NCE OF THE M SK

4. The operational life and efficiency of your Mask

will be prolonged if it

is

well maintained. Each

individual

3-8


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C-77-267-000/MB-OOO

is

responsible for maintaining the Mask in a service-

... ...

able and ready to wear condition.

5. Periodic Inspection It

is

the user s responsi

bility to ensure that all mask components and ancillary

equipment are clean and damage free. Through your

supervisor, report any damage such as the following,

to your NBC Officer/NCO for further advice:

a.

Mask

- headharness: torn or stretched; buckles

damaged.

- facepiece: punctures, tears/cuts (especial

ly in the headharness lug areas and drink

ing assembly).

- plastic components: cracked, chipped, or

broken.

- valves or plug: missing or damaged.

b Canister

- dents, cracks

on

plastic canister, holes or

damaged threads.

- sound of loose carbon when canister is

shaken.

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77-267-000/MB-OOO

c.

Carrier

- tears split seams.

- broken belt mounting lugs.

- unserviceable closures.

6. Cleaning the Mask.

Using a clean cloth the

Mask shall be cleaned as follows:

a.

Wipe and dry the inside of the facepiece and

nosecup.

NOTE

Ensure that all the valves are in place and

seated correctly.

b. Clean the eyepieces inside and out.

c. Clean the outside of the facepiece and the

headharness.

7.

Periodic

Cleaning

Periodic cleaning where

by the Mask is also disinfected shall be performed at

intervals of not more than six months or when:

a. Personnel are suffering from or are in contact

with a contagious disease.

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C-77-267-000/MB-OOO

b

The

Mask is being returned for maintenance

~

or

inspection.

c 0 n direction of a medical officer.

8 Periodic cleaning will be carried out as follows:

a. Remove the Mask from the Carrier.

b Remove Canister.

c Open the outlet valve cover, and let it hang.

d. Wash the Mask

in

a solution of two parts deter

gent washing detergent or equivalent) to 100

parts water, at a temperature of 20 40 degrees

Celsius. Agitate the Mask for one minute by

hand. Remove Mask from the solution and

drain the outside and inside of the Mask.

NOT

To drain liquids from the inside of mask, tilt

the inside of the mask downward and at the

same time pull the re-entry seal of the face

piece away from the inside of the Mask, al

lowing the trapped liquid to escape.

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C-77-267

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e. Rinse the Mask thoroughly in clean water. Re-

move the Mask from the rinse container and

drain water from the inside and outside of

Mask.

f Disinfect the Mask

in

a solution

of

two parts

Dettol or equivalent) to 100 parts water, at a

temperature of 20-40 degrees Celsius. Agi

tate the Mask for thirty seconds by hand. Re

move Mask from the solution and drain the in

side and outside of Mask.

g. Rinse the Mask again, as per paragraph 4 e.

9. Drying th Mask. Using a clean cloth, wipe

the inside of the Mask, ensuring that the re-entry seal

is free of any excess moisture. Wipe the eyepieces

carefully with a soft dry cloth, making sure the water

stains are removed.

NOTE

Great care shall be taken to prevent

scratching the eyepieces.

3-16


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C-77-267-000/MB-OOO

• CAUTION •

Do not hang the Mask by the headharness

or straps), apply heat, or turn the facepiece

inside out to hasten drying.

10. Allow the Mask to dry, ensure that all the valves

are correctly seated, close the outlet valve cover,

install the Canister and store in the Carrier.

HINTS FOR MASK WEARERS

11

Shaving.

Beard growth can reduce the effi

ciency of the seal between the skin and the face-seal.

Daily shaving is desirable.

12.

Haircuts

Long hair makes donning difficult

and may result in leakage around the face-seal if hair

is

trapped between it and the face.

13.

Confidence.

The effects of some agents be

come apparent only after donning the Mask. The wear

er must have confidence

in

the Mask and resist the

urge to unmask if symptoms appear or persist after

donning. ._

3-18


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C-77-267-000/MB-OOO

14. Moisture Accumulation. The chin-cup and

nosecup may accumulate moisture. This can be ·

cleared by removing the outlet valve cover leaning for

ward and blowing the moisture out through the outlet

valve.

OPERATING IN COLD WEATHER

15. The wearer may experience a certain amount

of discomfort when masked in temperatures

below 20

degrees Celsius. Sticking of the outlet valve and fog

ging of the eyepieces can occur and affect the efficien

cy of the wearer. Provided that the valves are correctly

positioned and the mask is fitted properly the fogging

should clear after a few seconds. However the colder

the conditions the longer it will take to clear therefore

be patient.

16.

o

free a frozen outlet valve the Mask should

be held firmly against the face and the wearer should

blow hard and/or massage the outlet valve.

SANDY OR DUSTY ENVIRONMENT

17. When the Mask is worn or stored in a sandy or

dusty environment the possibility of leakage at the

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77 267 000/MB OOO

outlet valve exists. Leakage may occur due to a build

up of sand or dust particles between the outlet valve

mount and the outlet valve.

18. To clear the outlet valve of any particle build

up

the wearer should blow hard.

19. Keep your Mask clean

at

all times.

c4 mask nbc manual

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