TM 3-4240-280-10

TM 3-4240-280-10 

OPERATOR’S MANUAL 

For 

Mask, Chemical-Biological: 

Aircraft, ABC-M24 and Accessories 

Mask, Chemical-Biological: 

Tank, M25A1 and Accessories 

See back cover for warning, distribution, 

and destruction information. 

HEADQUARTERS 

DEPARTMENT OF THE ARMY 

15 MARCH 1988


WARNING 

The A6C-M24 or M25AI protective masks will not protect the wearer’ against 

ammonia of carbon monoxide gases. They are not effective in confined spaces 

where the oxygen antent of the air is too low. 

Stop breathing when putting on your facepiece. Toxic agents maybe in the 

surrounding air. Perform the steps for putting on your facepiece quickly. You 

must put cm your facepiece before you take another breath. 

The facepkce must be checked for leaks when it k initially fitted and each time it 

is usad. A leaky facepkace will not protect you from toxic agents. 

Do not break the seal between your facepkce and the side of your face when 

putting on your helmet or hood. This could cause leakage of toxic agents into the 

facepke. 

Do mm wear contact lenses with facepieca 

a

WARNING (CONT) 

Canister insert filter MUST be already installed in canister. Filter insert prevents 

leakage of dust particles during operational use. 

If you become overheated in very cold weather, do not remove your facepiece 

outdoors until your head cools and any sweat has dried. Frostbite may result if the 

facepiece is removed while your face is still wet. These precautions are not 

required if you are in a warm snelter. 

Keep mask dry. Moisture could clog the canistef and make it useless. Moisture 

could also short microphone connectors, which could cause a loss of communication 

in the tank or aircraft. 

Keep face clean shaven. An unshaven face could cause a bad seal between face 

and facepiece. 

Do not expose your facepiece to temperatures above 120”F 

(48.89°C). If facepiece is exposed to air or water 

temperatures above 120”F, allow lens to cool below 120”F 

for at least 15 minutes before flexing or stowing mask in 

carrier. After cooling, check lens carefully for cracks, 

especially around periphery. 

b


WARNING (CONT) 

Wash facec)ieca usina water below 120”F [48. 89” C). Extxxure of lens to 

ternperatu;es atxwe ~20”F (48.89-C) may cause lens to-crack and leak, 

FIRST AID 

For first aid,refertoFM21-11. 

c

WARNING 

HEALTH/ENVIRONflE NTAL HAZARD 

Filter canisters use ASC Nhetlerite Carbon which contains 

Chromium VI. Chromium VI is a known carcinogen i f inhaled 

or swal 1 owed. Damaged or unusable canisters are classi fled 

as hazardous waste: 

DO NOT throw away damaged or unusable canisters 

as ordinary trash. 

DO turn in damaged or unusable canisters to your 

hazardous waste mnagermnt office or Defense 

Reutilization and Harketing Office (DRHO). 

Canisters are completely safe to handle and use if they are 

not damaged in such a way that carbon leaks from them. 

In unlikely event that carbon should leak, use protection 

such as a dust respi rator to cover nose and nuuth and put 

carbon In container such as self-sealing plastic bag; turn 

in to hazardous waste management office or DRt+O. 

Oisposal of hazardous waste is restricted by the Resource 

Conservation and Recovery Act as amended (42 U. S.C.A 

sec 6901 et seq). Violation of these laws is subject 

to severe criml nal penalties. 

d 

Change 2

TM 3-4240-28010 

C3 

CHANGE 

HEADQUARTERS 


NO. 3 Washington, D.C., 9 May 1997 

OPERATOR’S MANUAL 

FOR 

MASK, CHEMICAL-BIOLOGICAL: AIRCRAFT, ABC-M24 

AND ACCESSORIES 

MASK, CHEMICAL-BIOLOGICAL: TANK, M25A1 AND ACCESSORIES 

DISTRIBUTION STATEMENT C: Distribution authorized to U.S. Government agencies and their contact to protect 

technical or operational information. This determination was made on 30 Jul 1987. Other requests for this document will 

be refereed to: Director, Armament and Chemical Acquisition and Logistic Activity, ATTN: AMSTAACNML, Rock Island, 

IL 61299-7630. 

DESTRUCTION NOTICE Destroy by any method that will prevent disclosure of contents or reconstruction of the 

document

TM 3-4240-280-10, 15 March 1988, is changed as follows: 

1. The purpose of this change is to update the Preventive Maintenance Checks and Services (PMCS) to the current table format. 

2. Remove old pages and insert new pages as Indicated below. New or changed material is indicated by a vertical bar. 

Remove Pages 

Insert Pages 

i and i, 

i and ii 

1-1 thru 1-4 1-1 thru 1-4 

2-21 thru 2-64 2-21 thru 2-64 

D-3 and D-4 D-3 and D-4 

DA Form 2028 ------------------ 

Back Cover 

Back Cover 

3. File this change sheet in front of the publication for reference purposes. 

By Order of the Secretary of the Army: 

Official: 

JOEL B. HUDSON 

Administrative Assistant to the 

Secretary of the Army 

03415 

DENNIS J. REIMER 

General, United States Army 

Chief of Staff 

DISTRIBUTION: To be distributed in accordance with the initial distribution number (IDN) 280425 requirements for TM 3-4240-280-10.


C 2 

CHANGE 

HEADQUARTERS 


No. 2 Washington, DC, 16 November 

1989 

WERATOR’S MANUAL 

Fcx? 

MASK, CHEMICAL-BIOLOGICAL: AIRCRAFT, ABC-M24 

AND ACCESSORIES 

MASK, CHEM[CAL-BIOLWICAL: TANK, M25AI AND ACCESSORIES 

TM 3-4240-280-10 is changed .3S fO[[OWS: 

1. Remove old pages and lnser~ new pages as indicated 

below. New or changed material is lndlca?ed by a vertical 

bar. 

Remove Pages I n s e r t P a g e s 

a thru c/(d blank) a t h r u d 

2-7 and 2-8 2-7 and 2-8 

2-19 and 2-20 2-19 and 2-20 

2-43 thru 2-46 2-43 thru 2-46 

2-63 and 2-64 2-63 and 2-64 

2-105 and 2-106 2-105 and 2-106 

C-3 and C-4 C-3 and C-4

2. File this change sheet In front of the pub 

reference purposes. 

Icatlon 

for 

By Order of the Secretary of the Army: 

CARL E. VUONO 

General, United States Army 

Chief of Staff 

OFFICIAL 

w LLIAM J. MEEHAN I 

Briaadier General. United States Armv 

The Adjuta;t General 

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-28 

(block 425), operator maintenance requirements for 

TM 3-4240-280-10.

*TM 3-4240-28010 

Technical Manual 

HEADOUARTERS 


No. 3-4240-280-10 Washington, D.C., 15 March 1988 

Operator’s Manual 

For 

Mask, Chemical-Biological: Aircraft, 

ABC-M24 and Accessories 

Mask, Chemical Biological: Tank, 

M25A1 and Accessories 

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS 

You can help Improve this manual. If you find any mistakes, or If you know of a way to Improve the procedures, please 

let us know. Mall your letter or DA Form 2028 (Recommended Changes to Publications and Blank Forms), direct to: 

Director, Amament and Chemical Acquisition and Logistics Activity, ATTN: AMSTA-AC-NML, Rock Island, IL 61299-7630. 

A reply will be furbished to you. 

*This manual supersedes TM 3-4240280-10, 15 June 1983, including all changes. 

Change 3 i

TABLE OF CONTENTS 

Page 

CHAPTER 1 INTRODUCTION 1 - 1 

Section 

I 

General Information . . . . . . . . . . . . . . . . . 1-1 

Section II 

Equipment Description 1-3 

CHAPTER 2 

OPERATING INSTRUCTIONS . . . . . . . . . . 2-0 

Section 

I 

Description and Use of Operator’s Controls and Indicators. 2-0 

Section II 

Preventive Maintenance Checks and Services (PMCS) 2-21 

Section 

III 

Operation Under Usual Conditions 2-65 

Section 

IV 

Operation Under Unusual Conditions 2-126 

ii

Page 

CHAPTER 3 MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 3-0 

Section I Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-0 

Section II Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-0 

Section III Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 

APPENDIX A REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 

APPENDIX B COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LIST..... B-1 

APPENDIX C ADDITIONAL AUTHORIZATION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 

APPENDIX D EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST . . . . . . D-1 

iii

1-0


CHAPTER 1 

INTRODUCTION 

Section I. GENERAL INFORMATION 

1-1. SCOPE. 

a. Typaof MarNJa/. Operator’s manual. 

b. Model Numbers and Equipment Names. Mask, Chemical-Biological, Aircraft, ABC- M24, 

and Mask, Chemical-Biological, Tank, M25A1. 

c. Purpose of Equipment. Your mask protects your face, eyes, and lungs from field concentrations 

of all known chemical-biological (CB) agents and riot control (RC) agents. 

d. Special Limfiations on Equipment. The mask does not protect the wearer against ammonia 

or carbon monoxide gases. Also it is not effective in confined spaces where the oxygen 

content of the air is too low. 

1-2. MAINTENANCE FORMS AND RECORDS. 

Department of the Army forms and procedures used for equipment maintenance will be those 

prescribed by DA PAM 738-750, The Army Maintenance Management System (TAMMS). 

1-1

1-3. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR’s). 

If your mask needs Improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us what you don’t like about your equipment. Let us 

know why you don’t like the design. Put It on an SF 368 (Quality Deficiency Report). Mall it to us at Commander, U.S. Army Armament Research, Development 

and Engineering Center, ATTN: AMSTA-AR-QAW-A (R)/Customer Feedback Center, Rock Island, IL 61299-7300. Well send you a reply. 

1-4. CORROSION DATA FEEDBACK. 

a. Corrosion Prevention and Control (CPC) of Army Materiel is a continuing concern. It Is important any corrosion problems with this item be reported so that 

the problem can be connected and Improvements can be made to prevent the problem in future Items. 

b. While corrosion is typically associated with rusting of metals, it can also Include deterioration of other materials such as rubber and plastic. Unusual 

cracking, softening, swelling, or breaking of these materials may be a corrosion problem. 

c. Such problems should be reported using SF368 (Quality Deficiency Report). Send the form to: 

Commander 

U.S. Army Armament Research, Development and Engineering Center 

ATTN: AMSTA-AR-QAW-A (R)/Customer Feedback Center 

Rock Island, IL 61299-7300 

Use of key words such as “corrosion,” “rust,” “deterioration” or “cracking” will assure that the information is identified as a CPC problem. 

1-2 Change 3

Section II. EQUIPMENT DESCRIPTION 


1-5. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES. 

a. Pupae. The mask is used as an individual respirato~ protection device to protect your 

face, eyes, end lungs from all known chemical-biological (CB) and riot control (RC) agents. 

b. Capabilities and Features. 

WARNING 

The ABC-M24 or M25A1 protective masks will not protect the wearer against 

ammonia or carbon monoxide gases. They are not effective in confined spaces 

where the oxygen content of the air is too low. 

(1) Facepieces are supplied in three sizes: small (S), medhrn (M), and large(L) sizes. You 

will befitted and issued the size which best fits your face by your unit NBC NCO. 

(2) When the M25A1 mask is worn in a tank equipped with a filter unit, it can be coupled 

to the vehws filter unit by an air hose. 

(3) When the ABC-M24 mask is worn inside an aircraft, an oxygen adapter can be 

inatak$d for use with the aircraft oxygen system. 

(4) The Ml OA1 canister can be worn either fastened inside the carrier or with the canister 

carrying sling. 

(5) The facepiece can be fitted with optical inserts for personnel who must wear glasses. 

TIM inserts are available by medical prescription. 

1-3

1-6. DIFFERENCES BETWEEN MODELS. 

a. Throughout this manual, the term “mask” refers to the ABC-M24 an M25A1 masks. When data applies to one model only, the model will be 

specifically identified. Physical differences in appearance are covered in illustrations by blowouts and notations. 

b. The following table indicates specific differences between the models of masks covered in this manual. 

MASK ABC4-M24 M25A1 

M1 Canister Coupling 

X 

M13A1 Curler 

X 

M17 Carrier 

X 

M116G Microphone 

X 

M133W Microphone 

X 

M2 Antiglare Eyelens Outserts 

X 

ADDITIONAL AUTHORIED ITEMS 

ABC-M5 Task Mask Hood 

X 

Deleted 

M7 Aircraft Mask Hood 

X 

M8 Oxygen Supply Adapter 

X 

M2 Antiglare Eyelens Outserts 

x 

1-4 Change 3

1-7. EQUIPMENT DATA. 


a. 

Tabulated Data. 

Weight (with carrier): 

ABC-M24/M25Al masks, . . . . ...6.25 lb (2.83 kg) 

Dimensions (in carrier): 

ABC-M24mask . . . . . . . . . . . . . . ..4.ODX 12.OWX 12.OH 

(10. 15 X 30.47 X 30.47 cm) 

M25Almask . . . . . . . . . . . . . . . . ..6.5DX 10.75WX12.4H 

(16.5 X 27.3 X 31.49 cm) 

b. Perforrrrarrce of ABC-hf24/M25A 1 Masks. Filters all known chemical-biolo~ ical (CB) and 

riot controi (RC) agents. The Ml OA1 canisters are replaced in accordance with crit&ia ih PMCS 

paragraph 2-5. 

1-5

CHAPTER 2 

OPERATING 

INSTRUCTIONS 

Section I. 

DESCRIPTION AND USE OF OPERATOR’S 

CONTROLS AND INDICATORS 

2-1. 

GENERAL. 

a. Before attempting to use the mask and additionally authorized items, make certain YOU are 

familiar with the location and operation of all parts. 

b. Functions of NBC NCO maybe performed by first line supervisor. 

2-2. DESCRIPTION OF MASK. 

a. Facepiece Asse,nb/y. 

l Rubber faceblank (1) covers face and chin providing an airtight seal. 

. Clear plastic lens (2) is permanently fixed into faceblank and permits clear vision. 

. Adjustable head harness (3) is made of elastic straps and secures facepiece on face and 

chin. 

2-0


2-1

2-2. DESCRIPTION OF MASK (CONT). 

a. Facepiece Assembly (Corrt). 

Two optical insert supports (4) are molded inside each side of faceblank. Two studs (5), 

one located on each side of the faceblank, are used to attach antiglare eyelens outserf 

and/or winterization eyelens. 

Inlet stem (6) provides attachment of hose to faceblank to permit passage of filtered air 

from canister. 

Cable stem (7) provides an airtight seal for entry of the microphone cable into the 

faceblank. 

Connector (8) plugs into tank or aircraft communication system and connects to microphone 

by a cable. 

2-2


2-3

2-2. 

b, 

DESCRIPTION OF MASK (CONT). 

Nosecup Assembly. 

l Nosecup (1) is a soft rubber cup 

which fits firmly over your nose and 

mouth. It contains two one-way 

valves and houses the microphone. 

l Nosecup valve seats and disks(2) 

are one-way valves which allow 

clean air to enter the nosecup for 

normal breathing but prevent moist 

exhaled air from contacting and fogging 

the lens in cold weather. 

l Microphone (3) fits into pocket in the 

nosecup to transmit your voice 

through the aircraft or tank communication 

system. 

2-4

c. Outlet Valve Assembly. 


0 Outlet valve (l)releases ”usedair’’ and 

consists of a metal valve seat (2), rubber 

outlet valve disk [3), and soft rubberwver 

(4). 

2-5


d. M1OA 1 Canister and Air Duct Hose. 

l Air duct hose (1) is flexible, about 2 feet long, and connects the faceblank to the Ml OA1 

canister. It carries clean air from canister to faceblank. 

. Ferrule (2) strengthens connection of air duct hose to faceblank. 

. Ml OA1 canister (3) is filled with filter material which removes all known CB and RC 

agents from air breathed by the operator. 

l Canister carrying sling (4) provides a method of carrying Ml OA1 canister when worn 

outside the carrier. 

. Ml canister coupling (5) adapts canister to connect to the vehicle gas patiiculate filter 

unit (GPFU) or M8 mask adapter to the aircraft oxygen supply when flying at altitudes 

requiring oxygen. 

2-6


2-7

2-2. 

e. 

DESCRIPTION OF MASK (CONT). 

Carriers. 

l 

l 

l 

l 

Ml 7 tamer (1) and Ml 3A1 carrier (2) are made of mildewproof, waterproof cotton duck 

and prowde for storage and carrying of mask and additionally authorized items. 

M17 came? (1), shoulder strap (3), and waist strap (4) are attached so the carrier is worn 

on the right side in the alrcratt. 

The Ml 3A1 carrier (2), shoulder straP (5), and waist stra~ (6) are attached so the tamer -- 

is worn on the left side in the tank or vehicle. 

Quick opening flaps (7), held closed by three snap fasteners (older style) (8), or hook and . 

pile fasteners (newer Style) (9), provide easy access to the contents of either carrier. 

l Inside the carriers is an area with fleece lining (1 O) to protect faceblank lens. The carriers 

also have several pockets for holding items.-PoCket(11 ) holds Ml Al antifogging kit. 

pocket (12) holds the winterization kit, and pocket(13) holds decontamination kit, and 

F18 agent detector paper. Holding straps ( 14) secure the canister. 

2-8 Change 2


2-9


f. MIA 1 Antifogging Kit 

l Ml Al arrtifogging kit (1) IS a plastic container holding a piece of chemically treated 

cloth (2). When the faceblank lens is wiped with the cloth, moisture will not form and 

block the wearer’s vision. 

2-10

g. M2 Antiglare Eyelens Outsert .’ 


0 M2 antiglare eyelens outsefl (1) is issued with the ABC-M24 mask because the protective 

flying helmet sun visor cannot be used when facepiece assembly is worn. 

l The M2 antiglare eyelens outsert snaps on two studs on facepiece assembly to cut 

down on sunglare. 

*Also issued as part of the M3 winterization kit and listed as an AAL item 

~for the M25A1 mask. 

2-11


h, M6A 1 Face form. 

NOTE 

Do not throw faceform away, Save for reuse. 

. The M6A1 faceform (1) is a fiberboard support placed in the facepiece assembly when it 

is stored in the carrier. . 

2-12


2-3. DESCRIPTION OF ADDITIONALLY AUTHORIZED ITEMS (APP C). 

a. ABC-M5 and M7 Hoods. 

l The ABC-M5 hood (1) is worn with the M25A1 tank mask. The M7 hood (2) is worn with 

the ABC-M24 aircraft’ mask, 

., 

2-13

2-3. DESCRIPTION OF ADDITIONALLY AUTHORIZED ITEMS (APP C) 

(CONT). 

a. ABC-M5 (1) and M7 (2) Hoods (Cent). 

. Both hoods are made of rubber-coated fabric, which protects the neck areas of the head 

from toxic vapors or droplets. 

. Lens opening (3) provides unobstructed vision. 

. Neck cord (4) draws the hood close to neck by using slide fastener (5). 

. Underarm straps (6) keep hood down on the shoulders. Underarm straps (6) are fastened 

on fastening cloth (7) by tabs (8). 

. Hose cord (9) ties around hose or outlet valve for supporl and temple straps (1 O) attach 

to the facepiece assembly temple straps. 

2-14


2-15


(CONT). 

b. M3 Wkrterization Kit. 

. M3 wintenzation kit (1) IS worn when the temperature falls below 200 F ( – 7°C). 

. Insulating jacket (2) is worn over chin portion of facepiece and upper end of hose to 

retain body heat inside the facepiece. 

. Winterization outsert (3) snaps on two adjustable studs on the facepiece and prevents 

the lens from frosting over. 

l Antiglare eyelens outsert (4) is worn to cut down on sunglare 

2-16


2-17


(CONT). 

c. Optics/Inserts. 

WARNING 

Do not wear contact lenses with facepiece. 

l 

l 

Optical insert (1) is available by medical prescription and takes the place of operator’s 

eyeglasses while facepiece (2) is being worn. 

Prongs (3) on optical insert fit into holes in rubber flanges inside the facepiece to hold the 

insert in place. 

2-18

d. M8 Aircraff Mask Adapter. 


o The M8 aircraft mask adapter(1) is used with ABC-M24 mask in aircraft at altitudes 

which require oxygen. 

l The M8 a“rcraft mask adapter consists of an aircraft oxygen supply connector assembly 

(2) and Ml canister coupling (3). 

2-19

2-3. 

e. 

DESCRIPTION OF ADDITIONALLY AUTHORIZED ITEMS (APP C) (CONT). 

M258A 7 LkonLmurrafmg fit. 

l Consists of six packets in a plastrc case. 

l Three packets mntam gauze pads 

soaked wrth deccmtanwatron sokrdon. 

Three packets mntam gauze pads and 

glass capsules filled wth decontamnanon 

solution. 

l The M258A1 kit is used to demntammate 

skin and individual equ!pment. 

l Instnmrons for use are printed on the 

container and packets. Refer to 

TM 34230-216-10. 

f. M8 Chem!cal Agent Detecfor Paper. 

l Consists of a bcmk of perforated sheets of cAemImily treated, dye- impregnated paper. 

A cclor comparison bar chart is printed inside the front rover. 

Chemicals in the paper cause specific 

color when paper contacts liquid 

nerve or blister agents. 

Instructions on how to use the M8 paper 

are on the cover of book containing 

the detector paper. 

l The M8 paper is stored in me lower out- 

2-20


Section II. PREVENTIVE MAINTENANCE CHECKS 

AND SERVICES (PMCS) 

2-4. GENERAL 

a. Before you Operate. Always keep In mind CAUTIONS and WARNINGS. Perform your BEFORE PMCS on all missions. 

b. After you Operate. Be sure to perform your AFTER PMCS on all missions. 

c. Weekly (in combat situations). Be sure to perform your WEEKLY PMCS in combat ready 

situations only. 

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS). 

The operator must perform scheduled services to ensure the mask will operate properly. The PMCS table lists required checks and services that must be done to 

ensure accurate performance of the mask and additionally authorized items. The first column contains the Item number which shall be used as a source of item 

numbers for the TM number column on DA Form 2404; the second column contains the PMCS interval; the third column contains the Item to be inspected; the 

fourth column contains the inspection procedures; and the fifth column contains conditions under which the mask and AAL Items are to be reported not ready. 

Change 3 2-21

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (CONT). 

ITEM TO 

NOT FULLY 

ITEM CHECK/ MISSION 

NO. INTERVAL SERVICE PROCEDURE CAPABLE IF: 

1 BEFORE, FACEPIECE a. Visually inspect outside and Facepiece is dirty 

AFTER, ASSEMBLY Inside surface of facepiece Clean per paragraph 

WEEKLY (1) for dirt, mud, and greasy or 3-1. 

only substances. 

BEFORE, b. Check facepiece (1) for Facepiece has taken a 

AFTER, permanent set which may permanent set. 

WEEKLY 

prevent an airtight fit. 

Facepiece (1) is permanently 

set when it is difficult to spread 

open, and there is unusual or 

too much stiffness in the 

facepiece sealing areas. 

2-22 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-23

2-5. PREVENTIVE AINTIENANCE CHECKS AND SERVICES (PMC8) (CONT). 

ITEM TO 

NOT FULLY 



1 BEFORE, c. Check facepiece(1) for hole, Facepiece has holes 

(nt) WEEKLY tear or splits. Check for tears, or splits which 

sticky or spongy areas. are deep an allow 

Facepiece has sticky 

or spongy area. 

BEFORE, d. Check facepiece (1) for dry rot Facepiece has stiff 

WEEKLY (stiff dry areas which crumble dry areas, which 

when rubbed between two crumble when rubbed 

fingers) or cracks that expand or crack which get 

when the rubber is stretched bigger when the 

rubber is stretched. 

2-24 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-25


ITEM TO 

NOT FULLY 



1 NOTE 

(cont) 

Dry rot in head harness tabs 

is not cause for recton f 

pull check Is withstood. 

BEFORE, e. Check for dry rot in head Pull check Is not 

WEEKLY harness tabs (2). Hold wtlfttood. 

facepiece as illustrated. Grasp 

metal buckle (3) and inside 

flange of rubber tab (2) 

between thumb and forefinger. 

Pull on rubber tab (2) until It 

extends 1/2 inch to 3/4 Inch 

(1.3 cm to 1.9 cm) from normal 

position. 

2-26 Change3


ITEM TO 

NOT FULLY 



BEFORE, f. Check rubber next to lens (4) to Lens pulls away from 

WEEKLY be sure lens will not pull away facepiece. 

From facepiece. 

Change 3 2-27

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PUCS) (CONT). 

ITEM TO 

NOT FULLY 



1 BEFORE, Check lens(4) for cracks, cuts, Lens has cracks, 

(cont) AFTER, team, scratches, or stains cur, tears, 

WEEKLY giving a different color or scratches, and stains 

haziness 

giving a different 

color or haziness 

which prevent normal 

vision. 

BEFORE h. Check lens (4) for presence of Lens has small black 

AFTER, small black dots which may dots that cannot be 

WEEKLY indicate organic growth removed by mask 

(fungus) 

cleaning/sanitizing. 

BEFORE, i.. Put on facepiece (1) to check Len is damaged 

WEEKLY that your vision Is dear. A lens causing severe 

(4) in a facepiece that causes distortion d vision. 

distorted vision may be used by 

a crewman but may not be 

suitable for a pilot or tan 

driver. 

2-28 Change 3


ITEM TO 

NOT FULLY 



BEFORE, j. Inspect optical outsert studs(5) Studs are loose or 

WEEKLY on each side of lens (4) to be rubber around holes 

sure they am secured to 

is torn. 

facepiece (1) and 

rubber around hole 

Is not tom. 

Change 3 2-29


ITEM TO 

NOT FULLY 



1A FACEFORM CAUTION 

For storage and shipment: 

Make sure facepiece (NSN 

424001-0321605) Is 

Installed in the facepiece to 

prevent damage to the lens 

and distortion to the mask. 

BEFORE, Check that faceform is not Faceform Is missing 

AFTER, missing or damaged. See or damaged. 

WEEKLY 

NBC NCO for replacement 

2-30 Change 3


ITEM TO 

NOT FULLY 



2 BUCKLE CAUTION 

ASSEMBLIES Over a period of time, copper 

poisoning migrating into the 

facepiec from an 

unlacquered buckle assembly 

will make the entire facepiece 

unserviceable. 

AFTER, a. Make sure finish (lacquer) on Finish (lacquer) Is 

WEEKLY buckle assembles (1) covers missing at point of 

all buckle assembly surfaces rubber contact. 

In contact with rubber. 

Change 3 2-30.1


ITEM TO 

NOT FULLY 



2 AFTER, b. Check that metal parts of Metal parts are 

(cont) WEEKLY buckle assemblies (1) for broken, corroded, 

burns, breaks, corrosion, or have burns, or we 

missing parts 

missing. 

2-30.2/(2-31 blank) Change 3


b. Check metal parts of buckle assemblies 

(1 ) for burrs, breaks, corrosion, 

or missing parts. 

Metal parts are broken, 

corroded, have burrs, or 

are missing. 

2-31

2-5. PREVENTIVE MAINTENANCE CHECK AND SERVICES (PMCS) (CONT). 

ITEM TO 

NOT FULLY 



3 BEFORE, HEAD a. Put on facepiece (1) and check Head harness will not 

WEEKLY HARNESS head harness (2) for loss of hold facepieces firmly 

elasticity. 

against face. 

BEFORE, b. Inspect head harness (2) Head harness straps 

WEEKLY straps for dirt, cuts, team, or are cut, tom, 

missing hardware. Check mildewed, rayed or 

straps for mildew or fraying has missing parts. 

Clean with a stiff bristle brush 

(item 3, app D) if dirty or 

mildewed. 

2-32 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-33

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (CONT) 

ITEM TO 

NOT FULLY 



4 OUTLET CAUTION 

VALVE Do no use paper to remove 

ASSEMBLY moisture. Paper may break 

up and lodge In valve. 

AFTER, a. Remove outlet valve cover (1) Outlet valve disk and 

WEEKLY and check outlet valve disk (2) seat cannot be 

and outlet valve seat (3) for cleaned with a 

dust dirt, or moisture 

lint-free cheesecloth. 

Carefully remove any dust, dirt 

or debris with a damp 

cheesecloth (Item 4, app D). 

Then remove excess moisture 

with a dry, lint-free 

cheesecloth. 

2-34 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-35

2-5. PREVENIVE UAINTENANCE CHECKS AND SERVICES (PMCS) (CONT). 

ITEM TO 

NOT FULLY 



4 BEFORE, b. Check outlet valve disk (2) for Outlet valve disk will 

(cont) WEEKLY proper seating, sticky rubber, not seat property or Is 

cracked or curled disk, tears, sticky, cracked, 

or cuts 

curled, tom, or cut 

BEFORE, c. Check outlet valve cover (1) for Cover is cut, tom, or 

WEEKLY permanent set and tears or has taken permanent 

cuts which might cause top of set. 

cover (1) to contact outlet 

valve disk. Signs of 

permanent set are defined In 

Item 1 of PMCS. 

BEFORE, d. Install outlet valve cover (1) Outlet valve cover is 

WEEKLY 

missing. 

2-36 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-37


ITEM TO 

NOT FULLY 



5 BEFORE, AIR DUCT a. Be sure air duct hose(1) Air duct hose 

WEEKLY HOSE connections (2) are tight connections are 

broke. 

BEFORE, b. Gently stretch the air duct Air duct hose has 

WEEKLY hose by pulling on facepiece holes, tears, cuts or 

(3) and M10A1 canister (4) is worn or frayed. 

While air duct hose (1) is Wire reinforcement is, 

stretched, examine ft for worn broken, crushed, or 

or frayed covering; broken or kinked. 

crushed wire reinforcement; 

kinks that may restrict 

breathing when mask is worn; 

holes, tears, cuts, dirt, and 

mildew. Use brush (item 1, 

app D) to clean off dirt and 

mildew from air duct hose. 

2-38 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-39


ITEM TO 

NOT FULLY 



6 AFTER, M9 CANISTER Examine canister carrying Strap are tom or 

WEEKLY CARRYING ding (1) for tears, broken missing. Hardware is 

SLING straps, missing hardware, dirt, missing. 

and mildew. Clean dirty straps 

with clear cool water. Brush 

off mildew with a stiff bristle 

brush. (Item 3, app D). 

2-40 Change 3


ITEM TO 

NOT FULLY 



7 AFTER, M1 CANISTER a. Remove canister coupling (1) Canister coupling Is 

WEEKLY COUPUNG and check rubber-cup portion cracked or has holes. 

for cracks or hoes. 

AFTER, b. Check nozzle (2) at end of M1 Nozzle Is burred, 

WEEKLY canister coupling (1) for burn, cracked, dented, or 

cracks, dents, or corrosion corroded. 

Change 3 2-41


ITEM TO 

NOT FULLY 



7 AFTER, c. Replace canister coupling (1) M1 canister coupling 

(cont) WEEKLY Be sure rubber-cup portion fit does not fit snugly 

snugly over bottom of canister over M1 OA canister 

(3) and i properly seated end does not seat 

properly. 

2-42 Change 3


ITEM TO 

NOT FULLY 



8 M10A1 WARNING 

CANISTER DO NOT throw away 

dammed or unusable 

canisters as ordinary trash. 

DO turn In damaged or 

unusable canisters to your 

hazardous waste 

management office or 

Defense Reutilization and 

Marketing Office (DRMO). 

NOTE 

Refer to paragraph 2-6 for 

canister replacement criteria. 

Change 3 2-43


ITEM TO 

NOT FULLY 



8 AFTER, a. Remove canister (1) Canister body has 

(cont) WEEKLY and slide canister carrying hole, splits, dents 

aling (2) o M10A1 canister 

over 1/4-nch deep, 

(3). Check canister (3) body rust over large areas, 

for holes, splits, dents over 

or rusted seams 

1/44nch deep, rust over large 

areas, and open or rusted 

seers. 

WARNING 

Canister insert filter MUST be 

installed In canister. Filter 

Insert prevents leakage of 

dust particles during 

operational use. 

2-44 Change 3


ITEM TO 

NOT FULLY 



BEFORE, b. Check that filter Inert has Canister not 

AFTER, been Installed In canister (3) marked “canister 

WEEKLY 

inset installed” or a 

black line has not 

been painted along 

the canister seem to 

Indicate filter Insert Is 

In place. See your 

unit NBC NCO. 

Change 3 2-45

2-5. PREVENTIVE MAIN TENANC CHECKS AND SERVICES (PMCS) (CONT’ 

ITEM TO 

NOT FULLY 



8 BEFORE, c. Check that valve disk (4) Valve disk does not 

(cont) WEEKLY completely covers canister air cover air We 

Inlet (5). 

NOTE 

A canister partially clogged 

with dust will increase 

breathing resistance, but will 

not impair the ability of the 

canister to filter out CB 

agents. Refer to para 2- or 

canister replacement criteria. 

BEFORE, d. Check canter (3) for Deleted 

AFTER, 

exposure to toxic chemical 

WEEKLY 

agent. Your unit NBC NCO 

will provide guidance. 

2-46 Change 3


ITEM TO 

NOT FULLY 



BEFORE, e. Check to see that rubber Rubber portion of 

AFTER, portion of canister coupling (1) canister coupling Is 

WEEKLY is not tom tom. 

Change 3 2-47


ITEM TO 

NOT FULLY 



9 BEFORE, NOSECUP a. Check nosecup value seat (1) Nosecup value seats 

WEEKLY ASSEMBLY to be sure the value seat have pulled apart 

have not pulled apart from from nosecup. Valve 

nosecup (2) and that valve disk locating stud is 

disks(3) are not curled. Turn missing or broken. 

each valve disk (3) to be sure 

it is not stuck on valve seat (1). 

2-46 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-49

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (CONT 

ITEM TO 

NOT FULLY 



9 BEFORE, b. Examine nosecup valve disks Valve disks are 

(cont) WEEKLY (3) or creases, spots, or punctured. 

Indentations. If they appear, 

carefully remove nosecup 

valve disks (3) and visually 

inspect the disks against a 

light source for punctures. 

NOTE 

Notify unit maintenance 

personnel to change valve 

disks if they are curled, tom, 

split, or punctured. 

2-50 Change 3


ITEM TO 

NOT FULLY 



BEFORE, c. Check nosecup (2) to be sure Buttons are broken or 

WEEKLY that its sides are buttoned to missing. 

facepiece (4). Rebutton H not 

Check that nosecup buttons 

(5) are not broken or missing. 

Change 3 2-51


ITEM TO 

NOT FULLY 



10 BEFORE, MICROPHONE a. Check that microphone (1) Microphone is not 

WEEKLY properly seated n pocket of seated properly. 

nosecup (2). Be sure there is Consult unit NBC 

a tight fit between 

NCO. 

Microphone (1) and 

nosecup (2). 

BEFORE, b. Check cable (3) for broken or Cable Is cut or wires 

WEEKLY loose connections and worn are bare. Connector 

insulation. Check connector plug Is cracked, 

plug (4) for cracks, chips, or chipped, or insulation 

broken Insulation. Plug is broken. 

microphone (1) Into 

Microphone does not 

communications system in work. 

helmet to make sure It s 

working properly. 

2-52 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-53

2-5. PREVENTIVE MAINTE NACE CHECK8 AND SERVICES (PMCS) (CONT). 

ITEM TO 

NOT FULLY 



11 BEFORE, CARRIER Remove faceplace and Carrier is ripped 

WEEKLY contents from carrier (1). Straps are missing, or 

Check carrier for dirt, mildew, torn. Hardware is 

rip, torn straps, and missing 

missing. 

Hardware. Remove dirt or 

mildew by brushing with a stiff 

fiber brush (item 1, app D). 

2-54 Change 3


ITEM TO 

NOT FULLY 



12 BEFORE, M1A1 Open MIA1 antifogging kit (1) Rubbed area 

WEEKLY ANTIFOGGING and nib a small area of becomes fogged 

KIT facepiece with cloth (2) Antifogging kit Is no 

Breathe on lens. Refer to 

good. 

Instructions on container. 

Change 3 2-55


ITEM TO 

NOT FULLY 



13 BEFORE, M2 Inspect antiglare eyelens Outsert has cracks, 

WEEKLY ANTIGLARE outer (1) for cracks, cuts, cuts, scratches, or 

EYELENS scratches, or bends which bends which prevent 

OUTSERT block or distort vision normal vision. 

2-56 Change 3


ITEM TO 

NOT FULLY 



ADDITIONALLY 

AUTHORIZED 

ITEMS 

NOTE 

Needle holes at the seams 

are acceptable 

14 BEFORE, ABC-M5 AND Check hood (1) for hoe, cuts, There are more than 

AFTER, M7 HOODS or teams two pin holes In any 

WEEKLY 

one panel. There are 

NOTE 

cuts or team in the 

Hoods unserviceable for 

hood 

protection against toxic 

agents may be used for 

training. 

Change 3 2-57


ITEM TO 

NOT FULLY 



15 BEFORE, M3 a. Check insulating jacket (1) for Insulating jacket is 

WEEKLY WINTERIZATION dirt, tears, missing ties, or dirty, torn, or has ties 

KIT fastening cloths (2). missing 

BEFORE, b. Check winterization eyelens Outserts will not 

WEEKLY outsert (3) and antiglare fasten to faceplece or 

eyelens outsert (4) for 

their lens distort or 

damaged snaps or cracked, prevent dear vision. 

scratched, or bent lens. 

2-58 Change 3


ITEM TO 

NOT FULLY 



Change 3 2-59


ITEM TO 

NOT FULLY 



16 BEFORE, OPTICAL Inspect optical insert (1), if Lens, hams, or 

WEEKLY INSERT Issued, for broken lens, frame, prongs are broken or 

or prongs or. missing lens or 

lens or prongs are 

prongs 

missing. 

2-60 Change 3


ITEM TO 

NOT FULLY 



17 BEFORE, M8 AIRCRAFT a Check oxygen connection (1) Oxygen connector 

WEEKLY MASK for burr, cracks, dents, or has burrs, dents, 

ADAPTER corrosion. Be sure oxygen cracks, corrosion, or 

(ABC-M24 supply adapter (2) is free of oil, is oily or greasy. 

MASK ONLY) grease, or dirt which will catch 

fire when In contact with 

oxygen under pressure. 

BEFORE, b. Examine M1 canister coupling Coupling Is cracked 

WEEKLY (3) for cracks or broken or connector Is 

connector (4). 

broken. 

Change 2-61


ITEM TO 

NOT FULLY 



18 DELETED 

2-62 Change 3


ITEM TO 

NOT FULLY 



19 BEFORE, M8 PAPER, Check M8 paper (1) for M8 paper s damp or 

AFTER, CHEMICAL dampness or water damage water damaged. 

WEEKLY AGENT 

DETECTOR 

Change 3 2-62.1/(2-62.2 blank)


2-6. M 10A1 CANISTER REPLACEMENT CRITERIA. 

a. The canister will be replaced under the following conditions when In use in a combat zone, rapid deployment unit (24 hours or less), or a special operation 

(e.g. Explosive Ordnance Disposal (EOD), Technical Escort, or Chemical Accident/Incident Response Association (CAIRA)). 

(1) If the nozzle Is damaged, heavily rusted or Insecurely fastened to the canister body. 

(2) if canister has been physically damaged (racks or breaks) or dents over 114 Inch deep, rust or pitting over large areas. 

(3) If over 10% of the same are corroded. 

(4) If canister has been immersed in water. 

(5) When excessive breathing resistance is expend and visual Inspection reveals that the canister is clogged with dust (A canister clogged with dust will 

Increase breathing resistance but will not Impair the ability of the canister to remove CB agents.) 

(6) If S-3-3-2 lists the lot number of the canister as unserviceable. 

(7) if the canister has been in service for two years. NBC NCO will notify solder. 

(8) Every 30 days after exposure to a toxic agent and after each confirmed attack with blood agents. 

Change 3 2-63

2-6. M10A1 CANSTER REPLACEMENT CRITERIA (CONT) 

(9) If a blood agent threat, change fitter In accordance with the table below: 

M10A1 canister change criteria for COMBAT/SPECIAL UNITS only, by climate 

Climate 

Replacement 

Climate Description Intervals (Weeks)* 

Hot Hot-dry 52 

Hot-humid 13 

War Moderate 52 

Cold Humid 52 

*Filter elements that exceed these Intervals remain serviceable for TRADOC training activities only. 

(10) If no blood agent threat exist, change filter annually. 

(11) When directed by unit commander or unit NBC NCO. 

b. For all other units not listed In paragraph a above, the canister shall be replaced In a with a(1) through a.(5) and in addition, when notified of deployment. 

c. Turn in damaged or unusable canisters to your hazardous waste management office or Defense Reutilization and Marketing Office (DRMO). 

2-64 Change 3

2-7. GENERAL. 

Section III. OPERATION UNDER USUAL CONDITIONS 


WARNING 

Do not expose your facepiece to temperatures above 120”F (48.89” C). If facepieca 

is exposed to temperatures above 120”F (48.89’’C), allow lens to cool 

below this temperature before flexing lens or stowing facepiece in carrier or lens 

may crack and leak. 

This section contains operator’s instructions to put on and use the mask and additionally authorized 

items under normal conditions. For operation under unusual conditions, see paragraph 2-20. 

2-8. PUTTING ON YOUR FACEPIECE FOR FIT AND LEAK CHECK. 

NOTE 

A trained unit NBC NCO will supervise size selection and initial fitting of your 

facepiec-e. However, it’s your responsibility to make sure your facepiece fits 

properly, has a good seal, and is as comfortable as possible. 

2-65

2-8. PUTTING ON YOUR FACEPIECE FOR FIT AND LEAK CHECK (CONT). 

a. Loosen only head harness cheek 

straps (1) within 1 inch (2.5 cm) of metal 

clip ends (2). 

b. If you are wearing headgear and eyeglasses, 

remove them. 

2-66


c. Spread open the facepiece. Place your 

thumbs under cheek straps (1) and temple 

straps (3) with your little fingers 

wrapped around cheek straps and index 

fingers over temple straps. Then 

your hands to open facepiece (4) 

2-67

2-8. PUTTING ON YOUR FACEPIECE FOR FIT AND LEAK CHECK (CONT). 

NOTE 

Always put your chin in the facepiece first and pull the head harness up over your 

head. 

d. 

e. 

Put chm in facepiece chin pocket ( 

Using both hands, slip head harne 

over your head and pull facepiece 

your face. Grasp ends of cheek st 

with both hands and adjust with a 

jerky motion. 

2-68


f. Using your fingers, smooth head harness 

straps to ensure they lie flat against 

your head and stroke the edges (7) of 

facepiece (4) to push them against your 

face. 

2-69

2-9. CHECKING THE FIT OF YOUR FACEPIECE. 

NOTE 

Although a qualified person has supervised the initial fitting of your mask, it is your 

responsibility to be sure you have the right size mask and that your mask fits properly 

Check the following items to ensure a proper fit: 

a. Top and side edges of facepiece (1 ) should come well up on your forehead and 

within 1 inch (2.5 cm) of your ear. 

b. The pupils of your eyes should be about 1 inch (2.5 cm) from top of lens (2). 

c. Head harness cheek and temple straps (3) should not cut into ears. 

d. The bottom of facepiece (4) should not cut into your throat. 

2-70


NOTE 

Make sure microphone is properly fitted into recess in nosecup. If not, nosecup 

will be distorted and will not fit properly over your nose. 

e. Nosecup (5) should not block your vision or press painfully on your nose. Microphone (6) is 

securely fitted into nosecup recess. 

2-71

2-10. CHECKING YOUR FACEPIECE FOR LEAKS. 

WARNING 

You must check the facepiece for leaks when it is fitted and each time you put it 

on. A leaky facepiece will not protect you from toxic agents. 

Keep face clean shaven. An unshaven face could cause a bad seal between face 

and facepiece. 

a. Check that canister (l) improperly 

fitted to air duct hose (2) by firmly 

grasping hose clamp (3) and 

attempting to twist air duct hose (2) 

with moderate pressure. If the air 

duct hose or clamo turns while 

applying moderate pressure, tighten 

clamp more securely. 

2-72


NOTE 

Tha following check is shown with canister removed from the carrier. If the 

canister coupling is attached, this check can be performed with the canister inside 

the carrier, since the end of the canister coupling sticks out of the back of the 

carrier. 

b. Press palm of your hand over Ml canister 

coupling (4). If canister coupling(4) is not on 

canister (1), cover entire canister inlet opening 

(5) with your palm. 

c. Then check for leaks by breathing in lightly 

and holding your breath for a few seconds. If 

fac%pieca (6) collapses, your facepieca is airtight 

and will protect you against toxic 

agents. 

2-73

2-10. CHECKING YOUR FACEPIECE FOR LEAKS (CONT). 

NOTE 

Leaks around the edge of your facepiece are usually caused by improper fit or wrong 

size. You may find a leak by feeling incoming air on your face, or you may feel a bulge at 

the edge of your facepiece with your finger, or a buddy may see a bulge. 

d. If facepiece (6) does not collapse and remain so, locate the leak 

e. After the leak has been located, tighten the appropriate straps to stop the leak. 

(1) To stop leaks at forehead, tighten temple straps (7). 

(2) To stop leaks at temple, ttghten forehead straps (8) and temple straps (7). 

(3) To stop leaks at cheek, lift the head harness higher on your head and tighten 

forehead straps (8), 

(4) To stop leaks at throat or under chin, lift mask higher on face and seat the chin 

firmly. Tightening cheek straps (9) may also help. 

2-74


2-75

2-10. CHECKING YOUR FACEPIECE FOR LEAKS (CONT). 

(5) Airleaks may becaused byafaulty outlet valve (l O)orbythe outlet valve Mingheld 

on by dirt or bloom (a waxy surface coating from rubber preservative). Breathe out 

forcefully several times. This will usually remove foreign matter or bloom. If not, pull 

down rubber outlet valve cover (11 ) and carefully remove any dust, ditl or debris on 

the valve disk and underside of the valve disk(12) with a damp cheesecloth (item 4, 

app D). Remove excess moisture with a dry cheesecloth. If outlet valve disk(12) is 

sticking, massage lightly with one finger. 

NOTE 

If you cannot stop leakage, see your unit NBC NCO for assistance, 

2-76


2-11. REMOVING YOUR FACEPIECE. 

a. Loosen cheek straps by rolling 

cheek strap buckles (1) forward. 

This relieves tension on facepiece 

cheek tabs (2). 

b. Remove facepiece by grasping 

facqkxe with both hands at 

chin (3) and pulling down, outward, 

and up. 

c. Install your hood (para 2-1 9) and 

stow facepiece with hood in carrier 

(para 2-16). 

2-77

2-12. MARKING YOUR MASK FOR IDENTIFICATION. 

NOTE 

Although a mask will be used only by the individual to whom it is issued and fitted, 

do not make permanent identification markings on either the facepiece or carrier 

(AR 700-84). 

a. Under supervision of your unit NBC NCO, attach a removable tape or tag marked with 

your name or a code number to your mask carrier. 

b. The code number, if required, may include date the facepiece was fitted and tested. Code 

number must not Identify parent organization or be similiar to a neighboring unit. 

2-78

2-13. PUTTING ON YOUR FACEPIECE, WITH HOOD ATTACHED, IN 

TRAINING OR COMBAT. 


WARNING 

Stop breathing when putting on your facepkce. Toxic agents maybe in the 

surrounding air. Perform the steps for putting on facepiece quickly. You must put 

the facepkce on before you take another breath. 

CAUTION 

Care must be taken not to scratch the clear plastic lens when handling the 

facepiece. 

NOTE 

If you are putthg on the facepiece without the hood, ignore the procedures 

relating to the hood. 

If the hood is attached to your facepiece, let it hang inside out on the front of the 

facepiace while putting on facepiece. 

2-79


TRAINING OR COMBAT (CONT). 

a. Stop breathing. 

b. Remove helmet(1) and place 

between your knees, or on your lap. 

c. If you are wearing eyglasses remove 

and store them. 

2-80


d. Pull open flap (2) on carrier (3). Grasp 

facepiecs (4) at top and remove from 

carrier. Allow hood (5) to hang inside 

out in front of facepke. 

2-81



CAUTION 

Do not snap facepiece wide 

e. 

2-82


NOTE 

Always put your chin in the 

facepiece first and pull the 

harness up over your head. 

f. 

Put your chin in facepiece chin pocket (8). 

Using both hands, slip head harness (9) 

over your head and pull facepiece (4) 

up onto your face. Grab ends of cheek 

straps (6] with both hands, and adjust 

with a short jerky motion. 

2-83



g. Using your fingers, smooth head 

harness straps to ensure they lie 

flat against your head and stroke 

the edges (1 O) of facepiece (4) to 

push them against your face. 

h. Clear your facepiece by covering 

openings at bottom of outlet valve 

cover (11 ) with the palm of your 

right hand and breathing out forcefully 

so that air escapes around 

edges of facepiece (4). 

2-84


i. Check your facepiece for leaks by 

pressing palm over opening in Ml canister 

mupling(12) or canister inlet(13) 

to seal M1OA1 canister (14) and 

breathe in Iiahtlv. 

(1) 

(2) 

If faoeati collapses 

against your face, and 

remains so while you hold 

your breath, facepiece is airtight. 

If mask doesn’t collapse, 

check for hair or clothing 

between facepiece and your 

face. Adjust straps of head 

harness (9) if necesary and 

recheck. 

i. 

Start breathing normally. 

2-85



WARNING 

Do not break the seal between your facepiece and the side of your face when 

putting on your helmet or pulling hood up over your head. This could cause 

leakage of toxic agents into the faceplece. 

NOTE 

Perform step k below if wearing ABC-M24 mask with M7 aircraft hood. Wearers 

of M25AI mask and ABC-M5 tank hood should skip step k and proceed to step I 

k. On ABC-M24 mask only, carefully put on helmet (1) and secure it with neck strap. Unplug 

boom microphone connector from receptacle (15) in helmet and plug mask microphone 

connector (16) into receptacle (1 5). 

2-86


2-87



1. Grasp lower rear portion of hood (5) with both hands and role hood inward a few turns. Pull 

hood over helmet/head and unroll the hood while pushing it down to cover your neck and 

shoulders. 

2-88

m. Pull slider(17) to tighten neck cord(18) to a snug yet comfortable fit. 


n. Fasten preadjusted underarm straps(19) to obtain a snug yet comfortable fit. 

2-89



NOTE 

If wearing ABC-M24 aircraft 

mask and M7 aircraft hood, skip 

to step r below. 

o. On M25A1 mask, grasp helmet(1) 

inside next to earcups. Spread your 

hands to flex helmet(1) open. Put helmet 

(1) over your head and tilt forward 

so that helmet first touches part of 

facepiece resting on your forehead. 

Lower helmet (1) back and down over 

your head until it is seated in position. 

Carefully slide your hands out so that 

seal between your face and facepiece 

is not broken. 

2-90


p. On M25A1 mask, pull out boom 

microphone connector from receptac!a 

(20) in he4met (1 ) and plug in 

mask microphone connector to 

WWta@3 (20) in helmet (l). 

q. On M25A1 mask, coupie filter air 

hose to connector (21) on Ml canister 

cou~Ing(12) if the mask is worn 

inaide a combat vehicle equipped 

with a filter unit. 

2-91



r, On ABC-M24 mask, couple connector (21) on Ml canister coupling(12) to M8 oxygen 

adapter (22) if the aircraft is equipped with oxygen. 

s. Snap carrier flap closed and continue with your mission. 

2-92


2-14. REMOVING YOUR M25A1 TANK MASK WITH HOOD. 

a. Pull out microphone connector(1) 

from helmet (2). 

b. Remove helmet(2) and place 

between your knees or on your 

lap. 

2-93

2-14. REMOVING YOUR M25A1 TANK MASK WITH HOOD (CONT). 

c. Remove hood, lfworn, bydoing the following: 

(1) Unfasten underarm straps(3), 

(2) Loosen neckcord (4). 

(3) Pull backofhood (5) fowardover yourhead. Leave hood(5) attached to frontof 

facepiece (6). 

2-94


d. Remove faCepieCe (6) bydoingthefol- 

~’%osen chaek straps by rolling 

cheek strap buckles (7) forward. 

(2) Grasp facepi-(6) withboth 

hands at the chin area and pull 

down, outward, and UP. 

e. Put on helmet. 

2-95

2-14. REMOVING YOUR M25A1 TANK MASK WITH HOOD (CONT). 

f. Plug boom microphone connector(8) 

into-socket (9) in helmet (2). ‘ ‘ 

g. Wipe facepiece with a clean cloth 

(item 4, app D) to remove any moisture 

or dampness, 

NOTE 


detailed instructions on how to 

stow the canister carrying straps 

when the canister is used outside 

the carrier, When not in use, stow 

your facepiece in carrier with eye- 

Iens outserts installed to protect 

eyelens, 

h. See paragraph 2-16 for detailed 

instructions for folding hood on facepiece 

and stowing both in carrier, 

2-96


2-15. REMOVING YOUR ABC-M24 AIRCRAFT MASK WITH HOOD. 

a. Remove hood, if worn, by doing the following: 

(1) Unfasten underarm straps (1) 

(2) Loosen neck cord (2). 

(3) Grasp the lower rear portion of hood (3) with both hands and roll hood outward a few 

turns. Pull hood forward over your helmet, Allow hoed (3) to hang on front of facepkxz 

(4). 

2-97

2-15. REMOVING YOUR ABC-M24 AIRCRAFT MASK WITH HOOD (CONT). 

b. Pull out mask microphone connector (5) 

from helmet (6), 

c, Remove helmet (6) and place between 

your knees or on your lap. 

2-98


d. Remove facepk?ce (4) by grasping 

the facepiece at chin area with 

both hands and pulling down, outward, 

and up. 

e. Put on helmet. 

2-99

2-15. REMOVING YOUR ABC-M24 AIRCRAFT MASK WITH HOOD (CONT). 

f. 

9 

Plug boom microphone connector (7) 

into socket (8) in helmet (6). 

Wipe facepiece with a clean cloth 

(item 4, app D) to remove any moisture 

or dampness. 

NOTE 


detailed instructions on how to 

stow the canister carrying straps 

when the canister is used outside 

the carrier. When not in use, stow 

your facepiece in carrier with eye- 

Iens outserts installed to protect 

eyelens. 

h 

See paragraph 2-16 for detailed instructions 

for folding hood on facepiece and 

stowing both in carrier, 

2-100


2-16. STOWING YOUR FACEPIECE WITH HOOD AND CANISTER 

ATTACHED. 

CAUTION 

Keep the carrier free 

of grit and other foreign 

matter that might 

scratch the lens or 

block the valves. 

a. 

b. 

Check that facepiece is free 

of oil, solvents, and moisture 

before stowing. 

Adjust neck cord leather 

slider (1) on neck cord (2) to 2 

inches (5. 12 cm) from end of 

cord and make sure shoulder 

straps (3) are detached from 

hook and pile fasteners (4). 



ATTACHED (CONT). 

c. If mask will not be used for several 

days or is being turned in, a 

faceform (5) must be usad to 

support facepiece (6). 

d. 

Turn hood (7) inside out 

and let it hang freely in 

front of facepiece (6). 



e. Hold the top front forehead area of facepiece (6) with one hand. Using your other hand, 

grasp the widest portion of your M7 hood (7), or area farthest from you on the M5 hood (7) 

and fold this material to the right side of your facepiece (6). Use your thumb to hold this 


2-104 


ATTACHED (CONT). 

f. With your other hand, reach down and grasp shoulder straps (3), neck cord (2), and 

microphone cable (8) and fold them up along the right side of facepiece (6). Use the same 

thumb holding the fold of hood (7) to hold these items.


g. With your free hand, fold the bottom of hood (7) 

up to me right of facepiece (6). The bulk of the 

fold of the hood is now at the bottom right side 

of facepiece (6). 

h. Make sure canister (9) is stowed in 

the bottom of the carrier (10) and 

secured with the two short straps 

which fasten around the hose to 

hold canister in place. 

i. Fold air duct hose (11) into facepiece 

(6) and insert facepiece (6) 

with folded hood (7) into carrier (10) 

chin area first with lens up. Snap or 

press carrier flap (12) closed. 


2-17. STOWING MASK AND ADDITIONALLY AUTHORIZED ITEMS 

IN CARRIER. 

a. Locations for Mask and AAL Items Inside Carrier. 

(1) The antifogging kit is stowed in 

the small pocket (1) in back of 

the carrier. 

(2) The M258A1 individual decontaminating 

kit, and M8 

agent detector paper is 

stowed in the small 

pocket (2) on the side 

of the carrier away from 

your body. 

(3) The winterization kit is stowed 

in the large pocket (3) on the 

side of the carrier next to you. 

(4) The canister is stowed in the 

bottom of the carrier where 

there are two short straps (4) 

which fasten around the hose 

to hold me canister in place. 

(5) The facepiece with folded hood 

and hose attached is stowed in 

the center area (5) of the carrier 

(para 2-16). 

2-106 Change 2


b. 

Folding M9 Canister Carrying Sling and Stowing M10A1 Canister (When Canister Is Used 

Outside the Carrier). 

(1) Fold short straps (1) under flaps (2). D-rings (3) should extend beyond edge of 

flaps (2). 


2-17. STOWING MASK AND ADDITIONALLY AUTHORIZED ITEMS IN 

CARRIER (CONT). 

b. Folding M9 Canister Carrying Sling and Stowing M10A1 Canister (When Canister is Used 

Outside the Carrier) (Cont). 

(2) Fold flaps (2) against M10A1 

canister (4). Wrap long 

straps (5) snugly over flaps (2) 

and around canister (4) body 

in opposite directions. Fasten 

snap hooks (6) together. 


(3) 

(4) 

Adjust long straps (5) so that 

when snap hooks (6) are fastened 

they should hold long 

straps (5) snugly around canister 

(4) body. 

Place canister (4) in bottom of 

carrier (7) and secure it with 

two short straps (8). 


NOTE 

Some straps may be narrow 

with a single set of snaps. On 

M10A1 canisters which have 

the M1 canister coupling 

attached, make sure the coupling 

extends through the hole 

in the back of the carrier. 


2-17. STOWING MASK AND ADDITIONALLY AUTHORIZED ITEMS IN 

CARRIER (CONT). 

CAUTION 

Do not store other items on top of your facepiece or place unauthorized items in 

the carrier. Damage to the facepiece might result. 

Dampness will reduce the life of the M10A1 canister. Be sure you store your mask 

in a dry place. 

c. Storing your Mask and Additionally Authorized Items. Store your mask and AAL items, in 

the carrier, in a cool, dry place. Do not hang carrier in direct sunlight. Hang it by shoulder 

strap or D-ring if possible. 

2-110

2-18. WEARING YOUR CARRIER AND CANISTER CARRYING SLING. 


a. Wearing Carrier the Shoulder Carry Method. 

(1) Hold carrier (1) on your left side (M25A1) or right side (ABC-M24) and with your other 

hand bring shoulder strap (2) from back to front up and over opposite shoulder. 

(2) Fasten shoulder strap (2) to D-ring (3) and adjust to a comfortable length. 

(3) Fasten waist strap (4) to D-ring (5) and adjust to a comfortable fit. 

2-111

2-18. WEARING YOUR CARRIER AND CANISTER CARRYING SLING (CONT). 

b. Wearing M9 Canister Carrying Sling. 

(1) When seating space is limited remove M10A1 canister (1), with canister carrying 

sling (2) attached, from carrier. 

(2) Find a comfortable fit, for your location in vehicle or aircraft, with the canister either in 

front, on your right, or on your left side. 

(3) Lengthen and fasten carrying sling shoulder strap (3) and waist strap (4). Adjust 

straps as necessary. 

2-112


2-113

2-19. INSTALLING ADDITIONAL AUTHORIZED ITEMS TO YOUR MASK. 

a. Installing and Adjusting Your Hood. 

2-114 

NOTE 

The following procedures may be used for 

either the ABC-M5 Tank Mask Hood or M7 

Aircraft Mask Hood. Where procedures differ, 

the specific hood is identified. 

(1) Spread hood (1) out flat with 

opening for eyelens facing up. 

(2) Adjust neck cord leather 

slider (2) to 2 inches (5.12cm) 

from end of neck cord (3). 

(3) Preadjust underarm straps (4) 

for a snug but comfortable fit 

then unfasten them. 

(4) Put facepiece (5) inside hood 

through lens opening. Leave 

hose (6) and microphone 

cable (7) outside hood (1) for 

M5 hood. Put microphone 

cable (7) inside hood (1) with 

hose (6) outside hood (1) for 

the M7 hood.

(5) On the ABC-M5 hood only, 

temple straps (8) in hood (1) 

should be next to temple 

straps (9) on the facepiece. 


(6) Adjust hood (1) opening 

around eyelens rubber 

flange (10), and under microphone 

cable stem (11) for M5 

hood. Fit hood (1) opening 

around eyelens rubber 

flange (10) and over microphone 

cable stem (11) for M7 

hood. 

2-115

2-19. INSTALLING ADDITIONAL AUTHORIZED ITEMS TO YOUR MASK 

(CONT). 

a. installing and Adjusting Your Hood (Cont). 

NOTE 

In very cold weather (below 32°F), keeping the outlet valve outside the hood 

prevents moisture in exhaled breath from condensing and freezing under the 

hood. In very warm weather (above 85°F), keeping the outlet valve outside the 

hood prevents heat from getting in the hood. 

(7) For outside temperatures above 85°F or below 32°F be sure outlet valve (12) is 

positioned outside hood (1). Between 32°F and 85°F, outlet valve (12) should be 

inside hood (1). 

(8) On the ABC-M5 hood only, perform the following steps: 

(a) Reach inside hood (1) and fasten hood temple straps (8) to facepiece temple 

straps (9). 

(b) Pull cords (13) tight to draw hood (1) opening around eyelens rubber flange (10). 

(c) Tie cords (13) around hose (14) or outlet valve (12). Be sure hood (1) will not pull 

away from eyelens rubber flange (10). 

2-116


2-117


(CONT). 

a. Installing and Adjusting Your Hood (Cont). 

(9) Reverse hood (1) by pulling 

back of hood up and over 

facepiece (5) so that it hangs 

inside out from facepiece (5). 

NOTE 

When the hood is not going 

to be used, leave it hanging 

on the hose. Fold the hood 

into the facepiece and stow 

the facepiece and hood in 

carrier (para 2-16). 

For instructions on wearing 

your hood, refer to paragraph 

2-13. 

2-118

. Installing and Adjusting Your M8 Aircraft 

(1) Loosen canister straps (1) and 

remove M10A1 canister (2) 

from carrier (3). Hold 

canister (2) in one hand. 

(2) Fit M1 canister coupling (4) 

over inlet end of canister (2) 

and press it on. 


Oxygen Supply Adapter (ABC-M24 Mask Only). 

2-119


(CONT). 

b. Installing and Adjusting Your M8 Aircraft Oxygen Supply Adapter (ABC-M24 Mask Only 

(Cont). 

NOTE 

Pilots wearing the mask in helicopters carry the canister with the canister carrying 

sling because the carrier takes up too much space in the pilot’s seat. 

(3) Make sure canister coupling connector (5) extends through hole (6) in carrier (3). 

Fasten canister straps (1) in carrier (3) around air duct hose (7). 

2-120


(4) Plug male end (8) of oxygen connector (9) into aircraft oxygen supply system. 

(5) Plug connector (5) of canister coupling into socket (10) of oxygen connector (9). Fit 

strap (11) around shoulder. 

2-121


(CONT). 

c. Installing Your Winterization Kit When Temperature Falls Below 20°F (-7°C.). 

(1) Line up eyelens outsert (1) over lens (2) of facepiece (3). Push snap fastener sockets 

of eyelens outsert (1) over studs (4) on facepiece. 

(2) Line up eyelens outsert (1) over lens rubber frame (5) of facepiece. Pull cords (6) tight 

and cross them behind air duct hose (7). Bring cords (6) forward and tie them in a bow 

knot. 

(3) Open insulating jacket (8) fully and lift tab (9) to uncover slit (10) underneath. Push 

microphone plug (11) and cable through slit (10) from inside. 

2-122


2-123


(CONT). 

(4) Fasten insulating jacket (8) to facepiece (3) by performing the following: 

(a) Center insulating jacket (8) over front of air duct hose (7) and over chin portion of 

facepiece (3). 

(b) Place upper edge of insulating jacket (8) under lower edge of lens rubber 

frame (5). 

(c) Draw tie cords (12) up around lens rubber frame (5) and tie in a bow knot. Tuck 

ends of tie cords (12) in back of lens rubber frame (5). 

(5) Fasten insulating jacket (8) around air duct hose and outlet valve assembly by pressing 

together fastening cloth (13) at sides of jacket and then pressing tab (14) down 

firmly over cable (15). 

NOTE 

As the temperature rises, open the lower end of the insulating jacket as needed to 

prevent the incoming air from being warmed too much. 

2-124


2-125

Section IV. OPERATION UNDER UNUSUAL CONDITIONS 

2-20. USING MASK IN COLD WEATHER. 

WARNING 

Keep mask dry. Moisture could clog the canister and make it useless. Moisture 

could also short microphone connectors, which could cause a loss of communication 

in the tank or aircraft. 

a. General Instructions You Must Follow in Cold Weather. 

(1) During time between repeated uses, remove your facepiece from carrier and shake or 

flex facepiece to remove ice and snow. 

(2) 

(3) 

(4) 

(5) 

(6) 

CAUTION 

Do not warm up facepiece near a heater or open flame. 

Warm facepiece whenever you can. 

In a warm indoor area, dry facepiece with a clean cloth. Carefully dry outlet and 

nosecup valves. 

Before entering subzero temperatures, install winterization kit (para 2-19). 

Before entering a warm area from subzero temperatures, remove frost and snow 

from facepiece. 

Use antifogging kit to reduce fogging of lens. 

2-126

. Putting on Your Facepiece, With Hood attached, in Cold Weather. 


NOTE 

Your unit NBC NCO supervisor will determine when winterization kit is required. 

Take off gloves or mittens before attempting to put on your facepiece. 

(1) 

(2) 

Follow procedures for putting 

on your facepiece (1) (para 2-13 

steps a thru g). 

Clear the facepiece by doing 

the following: 

(a) Unfasten winterization kit, 

if worn. 

(b) Cover openings at bottom 

of outlet valve cover (2) 

with the palm of your right 

hand. 

(c) Breathe out gently so that 

air escapes around sides of 

facepiece (1). Do not clear 

facepiece by exhaling a 

large volume of air because 

moist air will frost the lens. 

2-127

2-20. USING MASK IN COLD WEATHER (CONT). 

b. Putting on Your FacePiece, With Hood Attached, in Cold Weather (Cont). 

(3) Follow procedures for checking 

your facepiece for leaks 

(para 2-13, step i). 

(4) Start breathing normally. 

(5) If the outlet valve disk (3) sticks 

to valve seat (4), do the following: 

(a) Partially open insulating 

jacket (5). 

(b) Pull outlet valve cover (2) 

down and massage outlet 

valve disk (3) with one finger 

when you exhale only. Keep 

doing this until the valve 

functions properly. 

(c) Reseat cover (2) and close 

insulating jacket (5). 

(6) Follow steps for donning hood 

and helmet (para 2-13, steps k 

thru s). 

2-128

c. Removing Your Facepiece, With Hood, in Cold Weather. 


WARNING 

If you become overheated in very cold weather, do not remove your facepiece 

until your head cools and any sweat has dried. Frostbite may result if the facepiece 

is removed while your face is still wet. These precautions are not required if 

you are in warm shelter. 

(1) Brush ice or snow from facepiece before taking it off. 

(2) Remove mittens or gloves, as necessary to remove facepiece. 

(3) Remove facepiece with hood (para 2-14 for M25A1 mask or para 2-15 for ABC-M24 

mask). 

(4) Wipe moisture or frost from insulating jacket of winterization kit after you unmask. 

Remove winterization kit if directed by unit NBC NCO. 

(5) Shake ice buildup from facepiece after you unmask. 

(6) Stow facepiece and hood in carrier (para 2-16). 

2-129

CHAPTER 3 

MAINTENANCE INSTRUCTIONS 

Section I. LUBRICATION INSTRUCTIONS 

No lubrication is required for the ABC-M24 and M25A1 masks. 

Section Il. TROUBLESHOOTING PROCEDURES 

There are no troubleshooting procedures for the ABC-M24 and M25A1 masks. 

3-0

Section lll. MAINTENANCE PROCEDURES 


3-1. DECONTAMlNATING, CLEANING, AND SANITIZING YOUR MASK. 

a. Decontaminating. 

T O decontaminate your mask, use the M258A1 individual decontaminating kit (see Additional 

Authorization List, Appendix C). Instructions for using the kit are printed on the 

container. FM 3-5 gives detailed instructions for decontaminating your mask. 

b. Cleaning. 

(1) Position canister (1) higher than facepiece (2). 

3-1

3-1. DECONTAMINATING, CLEANING, AND SANITIZING YOUR MASK (CONT). 

b. Cleaning (Cont) 

WARNING 

Wash facepiece using water below 120°F (48.89°C). Exposure of lens to temperatures 

above 120°F (48.89°C) may cause lens to crack and leak. 

CAUTION 

Wash the mask carefully so that the canister and microphone do not get wet. 

(2) Using a cheesecloth (3) (item 4, app D) which has been dipped in a utility pail (4) 

(item 6, app D) of warm soapy water (5) (item 8, app D) and wrung out almost dry, 

wipe facepiece (2) and hood (6) inside and out. You can also use a soft brush (item 2, 

app D) to remove stains. 

(3) Wipe facepiece (2) and hood (6) with a clean cheesecloth (3) (item 4, app D) that has 

been dipped in warm potable water and wrung out almost dry. 

(4) Wipe facepiece (2) and hood (6) dry with lint-free cheesecloth or allow to air dry. 

3-2

TM 3-424O-28O-1O 

3-3

3-1. 

b. 

DECONTAMINATING, CLEANING, AND SANITIZING YOUR MASK (CONT). 

Cleaning (Cont). 

(5) Check nosecup valve 

disks (7) to ensure that 

they have not been dislodged 

during cleaning. 

3-4


(6) Clean and polish eyelens (8) 

with plastic polish (item 7, 

app D) and cheesecloth 

(item 4, app D) as follows: 

NOTE 

Remove rings or other 

hard objects from hands 

before cleaning plastic 

surfaces. Do not use 

naphtha solvent on lens 

as it may harm facepiece 

rubber. 

(a) Using your bare hand, 

remove dirt, sand, or 

mud from eyelens (8). 

Wipe lens with cheesecloth 

(item 4, app D) saturated 

with potable 

water. Dry lens. 

3-5

3-1. DECONTAMINATING, CLEANING, AND SANITIZING YOUR MASK (CONT). 

b. Cleaning (Cont). 

(b) Apply plastic polish (item 7, 

app D) evenly, let dry, then 

wipe clean. Rub vigorously 

to remove light scratches. 

Do not rub too long in one 

place. 

(c) Remove any persistent 

smudges on eyelens (8) or 

polish left on rubber surfaces 

using isopropyl alcohol 

(item 5, app D) on 

cheesecloth (item 4, app D) 

(d) If the scratches and 

smudges cannot be 

removed, turn your mask 

into unit maintenance for 

replacement. 

3-6


(7) Using cleaning brush (item 1, app D), brush off surface dirt or mildew from air duct 

hose (9), M10A1 canister (1), and canister carrying sling (10). 

3-7

3-1. 

b. 

c. 

DECONTAMINATING, CLEANING, AND SANITIZING YOUR MASK (CONT). 

Cleaning (Cont). 

(8) Using cleaning brush (item 1 app D), brush any dirt or grit from carrier (11). lf 

carrier (11) is soiled, clean using scrub brush (item 3, app D), utility pail (item 6, app D), 

and potable cool water. 

Sanitizing. 

3-8 

NOTE 

The ABC-M24/M25A1 mask cannot be dipped in a sanitizing solution or water 

because sanitizing solution or water can damage the microphone and loosen the 

tape seal around the outlet valve. 

Mask is sanitized when it is turned in for reassignment. 

Sanitization of your mask, if required, will be done under the direction of unit personnel. See your 

NBC NCO or officer for assistance.

APPENDIX 

A 

REFERENCES 


A-1. 

SCOPE. 

This appendix lists all forms, field manuals, technical manuals, and miscellaneous publications. 

A-2. FORMS. 

DA Form 2028 . . . . . . . . Recommended Changes to Publications and Blank Forms 

DA Form 2404 . . . . . . . . Equipment Inspection and Maintenance Worksheet 

SF 368 . . . . . . . . . . . . . . Quality Deficiency Report 

A-3. FIELD MANUALS. 

FM 3-5 . . . . . . . . . . . . . . NBC Decontamination 

FM 21-11 . . . . . . . First Aid for Soldiers 

A-4. TECHNICAL MANUALS. 

TM 3-4230-218-10 . . . . Operator’s Manual for Decontaminating Kit, Skin, M258A1 

A-1

A-5. COMMON TABLE OF ALLOWANCES. 

CTA 8-100 . . . . . . . . . . . Army Medical Department Expendable/Durable Items 

CTA 50-970 . . . . . . . . . . Expendable/Durable Items (Except Medical, Class V, Repair Parts, and 

Heraldic Items) 

A-6. MISCELLANEOUS PUBLICATIONS. 

AR 40-63 . . . . . . . . . . Opthalmic Services 

AR 70-38 . . . . . . . . . . . . Research, Development, Test, and Evaluation of Materiel for Extreme 

Climatic Conditions 

AR 700-84 . . . . . Issue and Sale of Personal Clothing 

DA PAM 738-750 . . . . . The Army Maintenance Management System (TAMMS) 

SB 3-30-2 . . . . . . . . . . . . Chemical-Biological Canisters and Filter Elements: Serviceability Lists 

SB 740-94-2 Training Aid, Skin Decontammating 

A-2

APPENDIX B 


COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LIST 

B-1. 

SCOPE. 

Section l. INTRODUCTION 

This appendix lists components of end item and basic issue items for the ABC-M24 aircraft and 

M25A1 tank masks to help you inventory items required for safe and efficient operation. 

B-2. GENERAL. 

The Components of End Item and Basic Issue items Lists are divided into the following sections: 

a. Section Il. Components of End Item. This listing is for informational purposes only, and is not 

authority to requisition replacements. These items are part of the end item, but are removed and 

separately packaged for transportation or shipment. AS part of the end item, these items must be 

with the end item whenever it is issued or transferred between property accounts. Illustrations 

are furnished to assist you in identifying the items. 

B-1

. Section III. Basic IssueItems. These are the minimum essential items required to place the 

M24 Aircraft Mask/M25A1 Tank Mask in operation, to operate it, and to perform emergency 

repairs. Although shipped separately packaged, Bll must be with the M24 Aircraft Mask/M25A1 

Tank Mask during operation and whenever it is transferred between property accounts. The 

illustrations will assist you with hard-to-identify items. This manual is your authority to request/ 

requisition replacement Bll, based on TOE/MTOE authorization of the end item. 

B-3. EXPLANATION OF COLUMNS. 

The following provides an explanation of columns found in the tabular listings: 

a. Column (1) - Illustration Number (IIIus Number). This column indicates the number of the 

illustration in which the item is shown. 

b. Column (2) - National Stock Number. Indicates the National stock number assigned to the 

item and will be used for requisitioning purposes. 

c. Column (3) - Description. Indicates the Federal item name and, if required, a minimum 

description to identify and locate the item. The last line for each item indicates the FSCM (in 

parentheses) followed by the part number. 

d. Column (4) - Unit of Measure (U/M). Indicates the measure used in performing the actual 

operational/maintenance function. This measure is expressed by a two-character alphabetical 

abbreviation (e.g., ea, in., pr). 

e. Column (5) - Quantity required (Qty rqr). Indicates the quantity of the item authorized to be 

used with/on the equipment. 

B-2

Section Il. COMPONENTS OF END ITEM 


There are no components of end item required 

B-3

Section Ill. BASIC ISSUE ITEMS LIST 

(1) 

Illus 

Number 

(2) 

National 

Stock 

Number 

Description 

FSCM and Part Number 

(3) 

Usable 

On Code 

(4) 

U/M 

(5) 

Qty 

Rqr 

1 

Operator’s Manual For, Mask, 

Chemical - Biological, Aircraft, 

ABC-M24, and Mask, Chemical - 

Biological, Tank, M25A1 

EA 

1 


B-4

APPENDIX C 

ADDITIONAL AUTHORIZATION LIST 


C-1. SCOPE. 


This appendix lists additional items you are authorized for the support of the mask. 

C-2. GENERAL. 

This list identifies items that do not have to accompany the mask and that do not have to be 

turned in with it. These items are all authorized to you by CTA, MTOE, TDA, or JTA. 

C-1

C-3. EXPLANATION OF LISTING. 

National stock numbers, descriptions, and quantities are provided to help you identify and 

request the additional items you require to support this equipment. The items are listed in 

alphabetical sequence by item name under the type document (i.e., CTA, MTOE, TDA, OR JTA) 

which authorizes the item(s) to you. If the item required differs for different models of this 

equipment, the model is shown under the “Usable On Code” heading in the description column. 

These codes are identified as: 

CODE 

USED ON 

32A, 32B, 332 Model ABC-M24 

41A, 41B, 541 Model M25A1 

C-2

Section Il. ADDITIONAL AUTHORIZATION LIST 


(1) 

National 

.%xX 

Nlmm?f 

Desencxim 

FSC?U4 and 

Pal? Nlu-ncef 

(2) 

Usable On Code 

(3) 

U/M 

(4) 

aty 

Auth 

CTA AUTHORIZED ITEMS 

4240-00-848-6074 

ADAPTER MASK. AFlCRAt7, 32A, 325.332 

M8 (81361) C5-82-13 

EA 

1 

4230-01-101-3984 

DECONT’AMINAITW3 KIT, 32A, 32B, 332 

SKIN, ?d258Al 41A, 418,541 

(81361) CM-77-2366 

EA 

1 

424MW21 -8695 

HOOD, MASK. Ah%TIAiW, 32A,320. 332 

M? (81 349)MLH512?0 

EA 

1 

. 

4240~0460d987 

HOOD, MASK. TANK A63C-M5 41A, 418,541 

[81349) MILH51 143 

G1 

1 

# 

C-3

(1) 

Nauonal 

Sfcd 

Numcer 

Descnpuon 

FSCM and 

Part Number 

(2) 

Usaole On Cede 

(3) 

U/M 

(4) 

a~ 

Au(h 

CTA AUTHORIZED ITEMS 

OPTICAL INSERT” 32A, 323,332 

41A. 41B, 541 

PR 

1 

b 

4240-00-961-1062 

OUTSERT, EYELENS, 41A, 41B, 541 

ANTIGL4RE, M2 

(81361 )D5-2-1602 

EA 

1 

y 

6665-00-050-8529 

PAPER, CHEMICAL AGENT DETECTOR, M8 

(81361) 05-67-266 

BK 

1 

4240-00-066-0181 

WINTERIZATION KIT, 324.325,332 

CHEMICAL-BIOLOGICAL 41A, 410,541 

MASK: h43 

:81361 )DL5-77-934 

EA 

1 

—- 

C-4 

“Issued by prescription only (AR 40-63). 

PIN : 031245-002 

,

APPENDIX D 


EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST 

D-1. 

SCOPE. 


This listing is for informational purposes only and is not authority to requisition the listed items. 

These items are authorized to you by CTA 50-970, Expendable/Durable Items (Except Medical, 

Class V, Repair Parts, and Heraldic Items), or CTA 8-100, Army Medical Department Expendable/Durable 

Items. 

D-2. EXPLANATION OF COLUMNS. 

a. Column 1 - Item Number. This number is assigned to the entry in the listing and is 

referenced in the narrative instructions to identify the material (e.g., “Use plastic polish, item 7, 

app D”). 

b. Column 2 - Level. This column identifies the lowest level of maintenance that requires the 

listed item. 

C-Operator/Crew 

D-1

D-2. EXPLANATION OF COLUMNS (CONT). 

c. Column 3 - National Stock Number. This is the National Stock Number assigned to the 

item; use it to request or requisition the item. 

d. Column 4 - Description. Indicates the Federal item name and, if required, a description to 

identify the item. The last line for each item indicates the Federal Supply Code for Manufacturer 

(FSCM) in parentheses followed by the part number. 

e. Column 5 - Unit of Measure (U/M). Indicates the measure used in performing the actual 

maintenance function. This measure is expressed by a two character alphabetical abbreviation 

(e.g., ea, in., pr). If the unit of measure differs from the unit of issue, requisition the lowest unit of 

issue that will satisfy your requirements. 

D-2


Section Il. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST 

(1) 

ITEM 

NUMBEF 

(2) 

LEVEL 

(3) 

NATIONAL 

STOCK NUMBER 

(4) 

DESCRIPTION 

1 

c 

1005-00-494-6602 

BRUSH, CLEANING SMALL 

(19204) 8448462 

EA 

2 

c 

7920-00-205-0565 

BRUSH, DUSTING, LENS AND 

PHOTOGRAPHIC NEGATIVE: 

camels hair, wood handle 

(81348) H-B-1654 

EA 

3 

4 

c 

c 

7920-00-061-0037 

8305-00-222-2423 

BRUSH, SCRUB: nylon bristle 

(81348) H-B-1490 

CLOTH, CHEESECLOTH: cotton, 

basic, type 1, class 1 

(81 348) CCC-C-440 

EA 

YD 

D-3

(1) (2) (3) (4) (5) 

NATIONAL 

ITEM 

STOCK 

NUMBER LEVEL NUMBER DESCRIPTION U/M 

5 C 6505-00-655-8366 ISOPROPVL RUBBING ALCOHOL PT 

bottle, plastic container 

(56287) PUREPAC 

6 C 7240-01-094305 PAIL, UTILITY: plank EA 

snap on id, 5.00 

gal (18.93 L) 

(5653s) A-332 

7 C 79s3-0 794 POUSH, PLASTIC: liquid PT 

type 1 

(81348) P-P560 

8 C 8520-00-2280598 SOAP, TOILET: nonmedicated GL 

liquid, type 1 

(81348) P-8-624 (or equivalent) 

9 C 4240-01-372-3078 WIPES, RESPIRATOR: cleaning BX 

(50378) 504 

D-4 Change 3 

*U.S.. GOVERNMENT PRINTNG OFFICE: I1" - 545039/4005

TM 3-4240-280-10

WARNING - This document contains export-controlled technical data whose export is 

restricted by the Army Export Control Act (Title 22, U. S. C., Sec 2751 et seq) or Executive 

Order 12470. Violation of these export laws are subject to severe criminal penalties. 

DISTRIBUTION STATEMENT C: Distribution authorized to U. S. Government agencies 

and their contractors to protect technical or operational information. This determination 

was made on 30 July 1987. Other requests for this document will be referred to: 

Commander, US Army Armament, Munitions and Chemical Command, ATTN: AMSMC- 

MAR-T (A), Aberdeen Proving Ground, MD 21010-5423. 

DESTRUCTION NOTICE - Destroy by any method that will prevent disclosure of contents 

of reconstruction of the document. 

PIN: 031245-000

TM 3-4240-280-10

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