CHEMICAL-BIOLOGICAL MASK: COMBAT VEHICLE, M42

Transcription

1 TM OPERATOR S MANUAL FOR CHEMICAL-BIOLOGICAL MASK: COMBAT VEHICLE, M42 ( SMALL) ( MEDIUM) ( LARGE) See back cover for warning, distribution statement, and destruction notice. HEADQUARTERS DEPARTMENT OF THE ARMY 30 AUGUST 1988

2 TM C3 CHANGE NO. 3 HEADQUARTERS DEPARTMENT OF THE ARMY Washington, DC, 31 JuIy 1992 OPERATOR S MANUAL FOR CHEMICAL-BIOLOGICAL MASK: COMBAT VEHICLE, M42 TM is changed as follows: 1. The purpose of this change is to correct a warning, add a warning, and improve head harness illustrations representing proper fit procedures. 2. Changed information in the text is indicated by a vertical bar in the margin. 3. Illustration changes are indicated by a miniature pointing hand.

3 4. Remove old pages and insert new pages as indicated below. Remove Pages Insert Pages c and d c and d 2-57 through through through through and and and and File this change sheet in front of the publication for reference purposes.

4 By Order of the Secretary of the Army: Official: GORDON R. SULLIVAN General, United Sfafes Army Chief of Staff MILTON H. HAMILTON Administrative Assistant to the Secretary of the Army DISTRIBUTION: To be distributed in accordance with DA Form E, (Block 0661) Operator Requirements for TM

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9 WARNING The mask will not protect the wearer against ammonia or carbon monoxide gases. It is not effective in confined spaces when the oxygen content of the air is too low. You must check your facepiece for leaks when fitted and each time facepiece is put on. A leaky facepiece will not protect you from toxic agents. Stop breathing and close your eyes when putting on your facepiece. Toxic agents may be in the surrounding air. Perform the steps for putting on your facepiece quickly. You must put the facepiece on before you take another breath. In cold weather,do not clear facepiece by exhaling a large volume of air. Moist air will frost eyelenses and impair vision. If you become overheated in extremely cold weather, do not remove your facepiece outdoors until your face and head have cooled and any sweat has dried. Frostbite may result if facepiece is removed while your face is still wet. To prevent loss of air supply do not kink your hose. In toxic atmosphere, do not break the seal between your facepiece and the side of your face when putting on your helmet. This could cause the facepiece to leak. a

10 WARNING-(Cont) Keep face clean shaven. and facepiece. An unshaven face could cause a bad seal between face Female soldiers shall remove all hairpins, combs, hair knots, buns, or braids that will interfere with the facepiece seal. Check canister mating surface of the facepiece and areas between these surfaces for dirt or foreign material which could allow contaminated air into your facepiece. If the drinking system leaks, pinch the external drink tube where it connects to the outlet valve body to prevent inhalation of agent vapors until a replacement facepiece is obtained or wearing of the facepiece is no longer required. Do not connect the drink tube to your canteen until all mating surfaces have been checked and are free of contamination. Chemical agents could be swallowed, resulting in sickness and death. Care should be taken not to break the facepiece seal when pressing in the outlet valve disk. Do not drink if resistance is not felt, your drinking system is leaking. Notify unit maintenance to replace facepiece as aeon as possible. b

11 Do not use facepiece if outlet valve cover or outlet valve disk is missing or damaged. The facepiece will leak. Do not wear contact lenses with your facepiece. Make sure the gasket is seated in the hose before connecting the hose to the canister carrier. A missing gasket will affect the seal and will allow the wearer to inhale contaminated air. If you feel looseness in the fit of your facepiece during the performance of your mission, adjust your straps in accordance with para 2-12,e. Any solid matter (even grass) under valve disks will cause fogged eyelenses, discomfort, and leakage. Foreign material (dirt or debris) in carrier may cause valves in facepiece to leak. Do not store food in waterproof bag because of possible toxic effects. If hose clamp connection between facepiece and hose assembly is loose or has been removed, the mask integrity has been broken and mask must be returned to depot. FIRST AID For first aid refer to FM Change 3 c

12 Warning HEALTH/ENVIRONMENTAL HAZARD Filter canisters use ASC Whetlerite Carbon which contains Chromium VI. Chromium VI is a known carcinogen if inhaled or swallowed. Damaged or unusable canisters are classified 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 management office or Defense Reutilization and Marketing Office (DRMO). 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 respirator to cover nose and mouth and put carbon in container such as self-sealing plastic bag; turn in to hazardous waste management office or DRMO. Disposal 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 criminal penalties. d

13 TECHNICAL MANUAL ) HEADQUARTERS ) DEPARTMENT OF THE ARMY NO ) WASHINGTON, D.C. 30 AUGUST 1988 OPERATOR S MANUAL FOR CHEMICAL-BIOLOGICAL MASK: COMBAT VEHICLE, M42 ( SMALL) ( MEDIUM) ( LARGE) 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. Mail your letter or DA Form 2028 (Recommended Changes to Publications and Blank Forms) direct to: Commander, US Army Armament, Munitions and Chemical Command, ATTN: AMSMC MAR-T(A), Aberdeen Proving Ground, MD A reply will be furnished to you. i

14 PAGE CHAPTER 1. Section I. Section II. CHAPTER 2. Section I. Section II. Section III. Section IV. INTRODUCTION General Information Equipment Description OPERATING INSTRUCTIONS Description and Use of Operator s Controls and Indicators Preventive Maintenance Checks and Services (PMCS).... Operation Under Usual Conditions Operation Under Unusual Conditions CHAPTER 3. MAINTENANCE INSTRUCTIONS Section I. Section II. Section III. Lubrication Instructions Troubleshooting Maintenance Procedures PAGE 3-1 ii

15 PAGE APPENDIX A. APPENDIX B. Section I. Section II. Section III. APPENDIX C. Section I. Section II. APPENDIX D. Section I. Section II. PAGE A-1 COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LIST Introduction B 1 Component of End Item B 3 Basic Issue Items List B 4 ADDITIONAL AUTHORIZATION LIST Introduction C 1 Additional Authorization List C 2 EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST Introduction D-1 Expendable/Durable Supplies and Materials List D-3 iii

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17 CHAPTER 1 INTRODUCTION SECTION 1. GENERAL INFORMATION 1-1. Scope a. Type of Manual. Operator s manual. b. Model Number and Equipment Name. M42 combat vehicle chemical-biological mask. c. Purpose of Equipment. To protect your face, eyes, and lungs from field concentrations of chemical-biological (CB) agents, toxins, and radioactive fallout particles. d. Special Limitations on Equipment. Does not protect against ammonia or carbon monoxide gases. Does not protect you in closed spaces where there is not enough oxygen in the air Maintenance Forms and Records Department of the Army those prescribed by DA forms and procedures used for equipment maintenance PAM , The Army Maintenance Management System will be (TAMMS). 1-1

18 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 or performance. Put it on an SF 368 (Quality Deficiency Report). Mail it to us at Commander, US Army Armament, Munitions and Chemical Command, ATTN: AMSMC-QAD(R), Rock Island, IL We ll send you a reply Corrosion Data Feedback Corrosion Prevention and It is important that any problem can be corrected future items. Control (CPC) of Army materiel is a continuing concern. corrosion problems with this item be reported so that the and improvements can be made to prevent the problem in the 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. If a corrosion problem is identified, it can be reported using Standard Form 368, Quality Deficiency or "deterioration" Report. Use of key words such as "corrosion" "rust", "cracking" will assure that the information is identified as a CPC problem. The form should be cal Command ATTN: 1-2 submitted to Commander, U.S. Army Armament, Munitions and Chemi - AMSMC-QAD, Rock Island, IL

19 SECTION Il. EQUIPMENT DESCRIPTION 1-5. Equipment Characteristic, Capabilities, and Features Characteristics. Lightweight. Transported and stored in carrier. Facepiece is made of silicone rubber with inturned sealing surface so it can form a seal on your face. Includes both clear and neutral gray outserts. Canister quickly and easily replaced. Capabilities. When worn with proper canister installed, the facepiece protects face, eyes, and lungs from field concentrations of CB agents, toxins, and radioactive fallout particles. The facepiece can by coupled directly to the vehicle Gas Particulate Filter Unit (GPFU) system. 1-3

20 1-5. Equipment Characteristics, Capabilities, and Features-(Cont) The facepiece can be coupled into the combat vehicle communication system by the microphone cable. c. Features. Major features of the mask are the silicone rubber facepiece which provides a seal against CB agents, a canister which filters particulate matter and agents from air, side and front voicemitters which transmit the user s voice outside the facepiece, and an outlet valve with a drink tube, which allows the soldier to drink while wearing the facepiece Equipment Data a. Tabulated Data. Weight (with carrier) Dimensions (in carrier) 4.53 LB (2.06 kg) 9 x 11 x 4.5 (22.9 x 28.0 x 11.4 cm) b. Shipping and Storage Data. Number and type of pack fiberboard boxes per fiberboard container Fiberboard box: 1-4 Dimensions x 8.00 x 8.00 in. (25.40 x x cm)

21 CHAPTER 2 OPERATING INSTRUCTIONS SECTION 1. DESCRIPTION AND USE OF OPERATOR S CONTROLS AND INDICATORS 2-1. General Before attempting to use the mask and addi tionally authorized items, make certain you are familiar with the location and operation of all parts Description of Mask a. Facepiece Assembly. FACEBLANK ASSEMBLY (1) fits closely against your face to form a seal. HEAD HARNESS (2) consists of a headpad, forehead straps, temple straps, cheek straps, and quick donning tab. Secures facepiece HOSE (3) connects canister and canister carrier to facepiece. 2-1

22 2-2 Description of Mask-(Cont) NOSECUP VALVE DISKS (4) allow filtered air to enter nosecup and prevent moist exhaled air from fogging eyelenses in cold weather. OUTLET VALVE entering the DISK (5) releases exhaled air and prevents unfiltered air from facepiece. OUTLET VALVE COVER (6) protects the outlet valve from damage. FRONT AND SIDE VOICEMITTERS (7) transmit your voice outside of the facepiece. MICROPHONE CABLE (8) connects microphone to communication system. INLET VALVE DISK (9) allows filtered air to enter the facepiece and prevents moist exhaled air from entering the canister. AIRFLOW DEFLECTOR (10) directs inhaled air over eyelenses to prevent fogging. 2-2

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24 2-2. Description of Mask - (Cont) MICROPHONE (11) allows personto-person and radio conversa tion in high noise situations. INTERNAL DRINK TUBE (12) allows the operator to drink while wearing the facepiece. EXTERNAL DRINK TUBE (13) con nects the facepiece to the Ml canteen cap to allow the opera- 2-4

25 b. Canister Filters out CB agents and other particles from contaminated air. c. Canister Carrier Holds the canister and attaches to facepiece hose and the combat vehicle collective protection system. 2-5

26 2-2. Description of Mask-(Cont) Provides for storage and carrying of mask and additionally authorized items. Consists of DECON POCKET (1) for the M258 Decon Kit, SHOULDER STRAP (2), WAIST STRAP (3), SHORT STRAP (4), SHORT ADJUST- ABLE STRAPS (5), ID PLATE (6), and CANISTER POCKET (7) to cover quick disconnect for M42 mask. QUICK-OPENING FLAP (8), with hook and pile fastener, provides for ready access to contents. 2-6

27 e..... Outserts. RUBBER RINGS (1) fit over facepiece eyelens rings to secure outserts to the facepiece. Both clear and neutral gray outserts are provided. Clear plastic OUTSERTS (2) pro tect eyelenses from scratches and other damage. Neutral gray OUTSERTS (3) reduce sun glare... Prevent eyelenses in cold weather. Separate outserts right eyelenses. from fogging for left and 2-7

28 2-2. Description of Mask-(Cont) f. Ml Waterproof Bag. WARNING Do not allow food to come in contact with waterproof bag because of possible toxic effects. CAUTION Storage of mask in waterproof bag can degrade protective capability of face piece. Remove facepiece from waterproof bag asa soon as protection of mask is no longer required. Keeps mask dry when required by climate and mission. Stowed in left end pocket of carrier. Includes rubber bands for sealing. 2-8

29 g. Hood Made of rubber-coated fabric which protects neck and area of head not covered by your mask against CB agents. EYELENS OPENINGS (1), FRONT VOICE- MITTER OPENING (2), SIDE VOICEMITTER OPENING (3), INLET VALVE OPENING (4), and OUTLET VALVE OPENING (5) provide for unobstructed vision and breathing. CORD (6) draws hood close to neck by use of SLIDER (7). ZIPPER (8) permits opening of the hood for ventilation or closing for protection in accordance with Mission Oriented Protection posture (MOPP) requirements. UNDERARM STRAPS (9) keep HOOD ( 10) down on shoulders and are fastened on HOOK AND PILE FASTENERS (11). 2-9

30 2-2. Description of Mask-(Cont) h. Faceform. 2-10

31 2-3. Description of Additionally Authorized ltems (App C) Optical Inserts. Available by medical prescription for personnel who must wear glasses. NOTE Optical inserts have small screws that may become loose. If they do, ask a technician in your unit to tighten them and apply a drop of ad hesive or clear nail polish to prevent screws from loosening again. 2 11

32 2-3. Description of Additionally Authorized ltems(app C)-(Cont) b. Canteen With M1 Canteen Cap.. Includes special cap with hole that allows external drink tube to be connected to the canteen. 2-12

33 c. M8 Chemical Agent Detector Paper. Consists of a book of perforated sheets of chemically treated, dye-impregnated paper. A color comparison bar chart is printed inside the front cover. Chemicals in paper cause specific color changes when paper contacts liquid nerve or blister agents. Instructions for use are on the cover of book containing the paper. Stored in inside left pocket of carrier with waterproof detector bag. 2-13

34 2-3. Description of Additionally Authorized Items (App C)-(Cont) M258A1 Decontaminating Kit. Consists of six packets in a plastic case. Three packets contain gauze pads soaked with decontamination solution. Three packets contain gauze pads and glass capsules filled with decontamination solution. Used to decontaminate skin and individual equipment. Instructions for use are printed on the container and packets. Refer to TM Stored in outside pocket of carrier. 2-14

35 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 (B) PMCS on all missions. b. After You Operate. Be sure to perform your after (A) PMCS on all missions. c. Weekly (in combat situations). Be sure to perform your weekly (W) PMCS in combat situations only PMCS Procedures a. Your preventive maintenance checks and services table lists the inspections and care of your equipment required to keep it in good operating condition. b. The Item No. column is column on DA Form 2404 used as a source of item numbers for in recording results of PMCS. the TM Number c. The interval column of or procedure. your PMCS table tells you when to do a certain check 2-15

36 2-5. PMCS Procedures-(Cont). The procedure column of your PMCS table tells you how to do the required checks and services. Carefully follow these instructions. If you do not have the tools, or if the procedure tells you to, have unit maintenance do the work. column tells you why your equip- The Equipment Is Not Ready/Available If: ment cannot be used. NOTE The terms ready/available and mission capable refer to the same status: equipment is on hand and is able to perform its mission (see DA PAM ). If your equipment does not perform as required, refer to chapter 3. Report any malfunctions or failures on the proper form DA 2404, or refer to DA PAM NOTE Within designated interval, the checks in the following table are to be done in the order listed. 2-16

37 TABLE B-Before combat or training mission 2-1. PREVENTIVE MAINTENANCE AND SERVICES (PMCS) A-After combat or training mission CHECKS W Weekly in combat situations only ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: Hose. a. Check hose (1) for splits, cracks, breaks, or damage. Hose is cracked, broken, or damaged. b. Check that stalled on on hose to pull loose hose (1) is properly in. facepiece. Pull gently make sure it will not from facepiece. Hose is not properly installed or will pull loose from facepiece. 2-17

38 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (Cont) B-Before combat or A After combat or W-Weekly in combat training mission training mission situations only Item No. ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: 2-18 c. Remove canister carrier (para 3-2a). Check that gasket (2) is present. d. Check threads on hose fitting (3) for damage. Gently pull on hose fitting to make sure it will not pull free from hose. Gasket is missing. Hose fitting threads are damaged, or hose fitting pulls free from hose.

39 B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: 2 Canister Carrier. a. Remove rest of canister carrier (6) from facepiece hose. Check that canister cover (4) and canister carrier (6) have no cracks, breaks, or other damage. Canister cover on carrier is cracked, broken, or damaged. b. Check that straps (5) are not cut, frayed, or broken. Straps are cut, frayed, or broken. 2-19

40 TABLE 2-1. PARAGRAPH 2-5 para Change 1

41 B-Before combat or training mission A-After combat or training mission W-Weekly in combat situations only Item No. ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if:.. b. Check canister (7), especially around seams, for cracks, dents, or holes. Check air intake to make sure it is not clogged with dirt. Canister is cracked or dented on a seam, or has holes. Air intake is clogged with dirt... c. Check for damaged threads on canister. Threads on canister are damaged. l. d. Shake canister (7) and listen for signs of loose absorbent particles. Loose particles rattle or dust falls out when canister is shaken. 2-21

42 2-5. PMCS Procedures- (Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only para 3-3a 2-22

43 2-23

44 TABLE 2-1. paragraph para 2-18.

45 2-25

46 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) 2-26

47 2-27

48 TABLE 2-1. paragraph

49 B-Before combat or A-After combat or W Weekly in combat training mission training mission situations only 2-29

50 2-5. PMCS Procedures - (Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W Weekly in combat training mission training mission situations only 2-30

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52 TABLE 2-1. paragraph

53 B-Before combat or A After combat or W Weekly in combat training mission training mission situations only 2-33

54 2-5. PMCS Procedure-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situation only 2-34

55 2-35

56 paragraph 2-5. TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-36

57 para

58 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A After combat or W-Weekly in combat training mission training mission situations only 2-38

59 B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-39

60 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-40

61 2-41

62 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A After combat or W-Weekly in combat training mission training mission situations only 2-42

63 B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-43

64 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (Cont) B Before combat or A After combat or W-Weekly in combat training mission training mission situations only

65 B Before combat or A-After combat or W-Weekly in combat training mission training mission situations only ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: c. d. Check that nosecup valve disks (31) are present. Rotate nosecup valve disks to be sure they are not stuck; check that nosecup valve disks are not curled or torn. Check that nosecup valve disks are seated on inside of nosecup. Nosecup valve disk are missing, curled, torn, or stuck to nosecup valve seat. Nosecup valve disks are seated on outside of nosecup. 2-45

66 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B Before combat or A-After combat or W-Weekly in combat training mission training mission situations only ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: Voicemitters. a. Check retaining rings (32) on front voicemitter (33) and side voicemitter (34) for corrosion, cracks, or nicks. retaining rings by for looseness. Try to tighten hand to check Retaining rings are corroded, cracked, nicked, or are loose. 2-46

67 B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-47

68 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-48

69 B Before combat or A-After combat or W Weekly in combat training mission training mission situations only ITEM TO BE INSPECTED PROCEDURE Equipment is not Ready/Available if: b. Check for mildew, solvents, or abrasive materials which might harm facepiece. Check seams for broken stitches. Mildew, solvents, or abrasive materials are present. Seams are broken or stitching is loose. c. Check hook and pile fasteners for dirt. If dirty, clean with a stiff-bristle brush (item 2, app D). Make sure hook and pile fasteners are secure on flap. Hook and pile fasteners are loose or clogged with dirt. 2-49

70 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-50

71 B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only ITEM TO BE INSPECTED PROCEDURE b. Check that rubber bands are not sticky, broken, or brittle. Equipment is not Ready/Available if: Rubber bands are sticky, broken, or brittle. Optical Inserts. Inspect optical inserts (38) for broken lens, frame, or disconnected from facepiece. Lena or frame is broken, or insert disconnected from facepiece. is 2-51

72 2-5. PMCS Procedures-(Cont) TABLE 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - (Cont) B-Before combat or A-After combat or W-Weekly in combat training mission training mission situations only 2-52

73 2-6. Canister Replacement Criteria WARNING Wear a protective mask and proper protective clothing in accordance with local SOP when replacing or disposing of a canister exposed to toxic agents. a. In a Combat Zone, Rapid Deployment Assignment (24 hours or less), or a Special Mission [e.g., Explosive Ordnance Disposal (EOD), Technical Escort, Nuclear and Chemical Accident/Incident Response and Assistance (NAIRA/CAIRA) Teams, Surety Sitesl, notify unit maintenance if one or more of the of following conditions exist. See table 2-2 for Canister Replacement Intervals By Climate. (1) Canister has been immersed in water. (2) Canister has splits or cuts, or a bent or split threaded connector. NOTE Dents less than 1/4 inch deep, not on edge of seal, will not impair performance of canister. (3) Canister has been crushed

74 2-6. Canister Replacement Criteria-(Cont) 2-54 (4) You feel excessive resistance to breathing and inspection shows that canister is clogged with foreign matter. (5) If after removing facepiece you see charcoal dust on your face. (6) When unit commander directs replacement of canister. (7) When SB reports the filter lot as unserviceable. (8) Every 30 days after initiation to toxic chemical operations and after each confirmed attack with blood agents. b. In all other units not covered in para 2-6a, replace canisters if one or more of the following conditions exist. (1) Canister has been immersed in water. (2) Canister has splits or cuts, or a bent or split threaded connector. NOTE Dents less than 1/4 inch deep, not on edge of seal, will not Impair performance of canister.

75 (3) Canister has been crushed. (4) You feel excessive breathing resistance and inspection shows that canister is clogged with foreign matter. (5) If after removing facepiece you see charcoal dust on your face. (6) When SB reports the filter lot is unserviceable. (7) When unit commander directs replacement of canister. c. Turn in damaged or unusable canisters to your hazardous waste management Office or Defense Reutilization and Marketing Office (DRMO). Change

76 2-6. Canister Replacement Criteria-(Cont) Table 2-2. CANISTER REPLACEMENT INTERVALS BY CLIMATE FOR COMBAT ZONE, RAPID DEPLOYMENT, AND/OR SPECIAL MISSION *Climate categories are defined in AR **Canisters that exceed these intervals remain serviceable for training only. 2-56

77 SECTION III. OPERATION UNDER USUAL CONDITIONS 2-7. General a. 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 b. For usual conditions, your facepiece shall be worn with hood attached Putting On Your Faceplate Without Hood To Verify Fit. WARNING Keep face clean shaven. An unshaven face could cause a bad seal between face and facepiece. Female soldiers shall remove all hairpins, combs, hair knots, buns, or braids that will interfere with facepiece seal. NOTE A trained unit NBC NCO will supervise size selection and initial fit ting of your facepiece. However, it s your responsibility to make sure your facepiece fits properly, has a good seal, and is as comfortable as possible. 2-57

78 2-8. Putting On Your Facepiece Without Hood To Verify Fit-(Cont) a. Put your chin in chin pocket and press facepiece snugly against your face. b. Cover openings at bottom of outlet valve (1) with palm of one hand. Breathe out hard so that air escapes around edges of facepiece (2). WARNING To prevent loss of air supply do not kink your hose. c. With palm of hand, cover inlet port of canister and breathe in. Facepiece (2) should collapse against your face, and remain so while you hold your breath. If it does, facepiece (2) is airtight. If facepiece (2) does not collapse, check for hair, clothing, or other matter between facepiece (2) and your face Change 3

79 d. Grasp tab (3) and pull head harness (4) over your head. Be sure your ears are between the temple straps (5) and cheek straps (6). NOTE Temple and forehead straps have already been adjusted during fitting. e. I f. g. h. While holding facepiece to face with one hand, maintain seal. Using other hand, tighten cheek straps (6) one at a time. Be sure headpad (7) at the back of your Straps (5, 6, and 8) against your head. is centered head. should lie flat Clear your facepiece again (step b) and recheck your facepiece for leaks (step c). Change

80 2-9. Checking the Fit of Your Facepiece following cri- Check for proper fit according to the teria: a. b. c. Edge (1) of facepiece comes well up on your forehead, but not into the hairline, and within 1 inch (2. 5 cm) of your ear. Temple straps (2) and cheek straps (3) do not cut into your ears. Head harnesss straps are flat against head, and are in a straight line with tabs (4). d. Pupils of your lenses (5). e. f. eyes are near center of eye- Facepiece does not press flesh so tightly that eyes partly close. Facepiece does not leak around edges (para 2-12) Change 3

81 2-10. Installing Hood On Facepiece a. b. c. d. Unfold and unzip hood (1 ) and lay it flat. Loosen cord (2). Unfasten underarm straps (3). Remove outserts from facepiece (para 3-3a). Remove canister and canister carrier from hose (para 3-2a). 2-61

82 2-10. Installing Hood On Facepiece-(Cont) 2-62

83 e. Insert facepiece (4) inside hood (1) and aline eyelenses (5) of facepiece with eyelens opening (6) in hood.. f. Unfasten hook and pile fasteners (7) on hood. hood facepiece. g. Aline front voicemitter (8) on facepiece with on hood. Feed microphone cable through front hood. CAUTION Feed hose through opening in front voicemitter opening (9) voicemitter opening (9) on Avoid over-stretching holes in the hood tear. h. Stretch bottom of opening in hood under facepiece. facepiece, hood fabric could outlet valve cover (10) on i. Aline sideport (11) on facepiece with sideport opening on hood, and aline side voicemitter (12) with side voicemitter opening on hood. j. Stretch openings in hood over hose adapter and sideport (11) and side voicemitter (12) on facepiece. 2-63

84 2-10. Installing Hood On Facepiece-(Cont) 2-64

85 k. Stretch eyelens openings and front voicemitter openings in hood over eyelenses and front voicemitter on facepiece by pulling hood fabric along sewn seams, and bending facepiece at eyelenses. l. Fasten hook and pile fasteners, making sure that opening in hood for outlet valve cover (10) is stretched over upper part of outlet valve cover. m. Install outserts (para 3-3c). Install canister and canister carrier on hose (para 3-2 b). 2-65

86 2-11. Putting On Your Facepiece WARNING When putting on your facepiece, stop breathing and close your eyes. Toxic agents may be in the surrounding air. Perform the steps for putting on your mask quickly. You must put the facepiece on before you take another breath. Do not wear contact lenses when wearing optical inserts Change 2

87 CAUTION DS2 may damage the voicemitter of the facepiece. When exposed to DS2, remove canister and rinse your facepiece and hood in clean water. Do not wet canister. Care must be taken not to scratch the clear plastic eyelenses when handling the facepiece. Change

88 2-11. Putting On Your Facepiece-(Cont) a. Stop breathing and close your eyes. b. Remove your helmet. Put helmet between your legs (above the knees) or hold your rifle between your legs and put helmet on the muzzle. If you drop your helmet, keep on masking; you can pick up your helmet later. WARNING Do not wear contact lenses with your facepiece. c. Take off your glasses or contact lenses, if you are wearing them. d. Open carrier (1) with your left hand and hold it open. e. With right hand, grasp facepiece (2) and remove from carrier (l) PIN: *U.S. GOVERMENT PRINTING OFFICE : (12295)

89 f. g. Put your chin in chin pocket and press facepiece snugly against your face. Cover openings at bottom of out let valve (3) with palm of one hand. Breathe out hard so that air eacapes around edges of facepiece (2). WARNING To prevent loss of supply do not kink hose. air your h. With palm of hand cover inlet port of canister and breathe in. Facepiece (2) should collapse against your face, and remain So while you hold your breath. If it doesa, facepiece (2) is airtight. If facepiece (2) does not collapse, check for hair, clothing, or other matter between facepiece (2) and your face. i. Grasp tab (4) and pull head harness (5) over your head. are between the temple straps (6) and cheek straps (7). Be sure your ears 2-69

90 2-11. Putting On Your Facepiece - (Cont) NOTE Temple and forehead straps have already been adjusted during fitting. j. I k. While holding facepiece to face with one hand, maintain seal. Using other hand, tighten cheek straps (7) one at a time. Be sure headpad (8) is centered at the back of your head. 1. Straps (6, 7, and 9) should flat against your head. lie m. Clear your facepiece again (step g) and recheck your facepiece for leaks (step h). n. Resume breathing Change 3

91 CAUTION Be very careful when pulling on hood. The hood could snag on the buckles of the head harness and tear. o. Grasp back edge of (10) and carefully hood skirt pull hood over your head so that hood covers the head, neck, and shoulders. 2-71

92 2-11. p. q. Putting On Your Facepiece-(Cont) Pull slider (11) downward and closed. Tighten cord (12). zip front r. s. t. u. NOTE After you have adjusted the underarm straps on your hood, do not loosen them. Fasten and adjust underarm straps (13) WARNING when putting on your helmet, be sure not to upset the seal between your facepiece and the side of your face. Toxic agent: could leak into your facepiece. Put on helmet and connect microphone cable. Close carrier. Continue your mission. WARNING If you feel looseness in the fit of your facepiece during the performance of your mission, adjust your straps in accordance with para 2-12,e Change 3

93 2-12. Checking Your Facepiece for Leaks WARNING You must check your facepiece for leaks when fitted and each time facepiece is put on. A leaky facepiece will not protect you from toxic agents. NOTE Helmet should be removed before checking facepiece for leaks, and should be donned when check is completed. a. Remove canister cover 3-2a). (1) (para b. c. d. Make sure canister (2) is screwed tightly into hose (3). Install canister cover (para 3-2 b). Press palm of your hand over canister cover opening. 2-73

94 2-12. Checking Your Facepiece for Leaks-(Cont) e. Breathe in lightly and hold your breath for a few seconds. If facepiece remains collapsed, facepiece is airtight and will protect you against toxic agents. NOTE Leaks around the edge of your facepiece are usually caused by bad fit. 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. f. Check for leaks at edge of facepiece by feeling for incoming air on your face. g. Check for bulge by running finger around edge of your facepiece. NOTE After each corrective action, retest. h. Get rid of leaks by adjusting straps: 2-74

95 TO stop leaks at forehead, adjust temple straps (6). To stop leaks at temple, adjust forehead (6). straps (7) and temple straps TO stop leaks at cheek, adjust cheek straps (8) and be sure headpad (9) is centered at the back of your head. To stop leaks at the throat or under the chin, lift facepiece higher on face, seating chin firmly- Adjusting forehead straps (7) and cheek straps (8) may also help. i. An air leak may be caused by an outlet valve (10) that is faulty or held open by dirt. Do the following steps: Change

96 2-12. Checking Your Facepiece for Leaks-(Cont) Breathe out forcefully several times ; this will usually remove the dirt. If breathing does not remove dirt, remove facepiece, pull up outlet valve cover (11), lift up outlet valve disk (12), and wipe underside of outlet valve disk (12) with a dry, lint-free cheesecloth (item 3, app D). If outlet valve disk (12) is sticking, massage lightly with one finger NOTE If you have a bad seal and cannot stop leak, notify unit maintenance to replace mask.

97 2-13. Connecting and Using the Drinking System WARNING Do not connect the drink tube to your canteen until all mating sur faces have been checked and are free of contamination. Chemical agents could be swallowed, resulting in sickness or death. NOTE To use the drink tube, canteen cap. your canteen must be equipped with an Ml a. Fill your canteen before entering contaminated area, or, if in a contaminated area, work inside a protective shelter. b. Use M8 chemical agent detector paper to check for contamination before using the drink tube. If contamination isa detected, decontaminate drink tube and Ml canteen cap, with M258A1 decontaminating kit and recheck with M8 detector paper. WARNING Care should be taken not to break the facepiece seal while pressing in on the outlet valve. 2-77

98 2-13. Connecting and Using the Drinking System-(Cont) NOTE Water may leak into facepiece if mouth is taken off internal drink tube while canteen is in the raised (drinking) position. c. d. e. f. g. Push in on top of outlet valve (1) and grasp internal drink tube between your teeth. Steady facepiece (2) and pull quick disconnect coupling (3) out of outlet valve cover (4). Remove canteen from canteen carrier. Flip open cover (5) on Ml canteen cap (6). Push quick disconnect coupling (3) into M1 canteen cap (6) so that pin (7) enters quick disconnect coupling (3). WARNING If resistance is not felt, your drinking system is leaking. Do not drink. Notify unit maintenance to replace mask as soon as possible. 2-78

99 h. Blow to create positive pressure You should feel some resistance. NOTE Do not tilt head back while drinking. i. If system does not leak, raise and invert canteen (8) and drink water from canteen. Change

100 paragraph 2-13 paragraph 2-14 Connecting end Using the Drinking System-(Cont) After several swallows, stop sucking and lower canteen. Blow into internal drink tube to prevent canteen from collapsing. Repeat drinking procedure as required. Disconnect drinking system (para 2-14). Disconnecting the Drinking System WARNING To prevent possible leakage around facepiece do not pull on external drink tube when removing canteen. Turn canteen upright. Blow into internal drink tube and pull quick disconnect coupling (1) out of canteen Change 3

101 c. d. e. f. g. Firmly grasp quick disconnect coupling and pull can teen down and away to disconnect coupling. Check your facepiece for leaks (para 2-12). Remove internal drink tube from mouth. Push quick disconnect coupling back into pocket on facepiece. Flip down cover (2) on Ml canteen cap (3) before stowing. 2-81

102 2-15. Checking Drinking System for Leaks WARNING You must check your facepiece for leaks when fitted and each time facepiece is put on. A leaky facepiece will not protect you from toxic agents. a. Pull quick disconnect coupling (1) out of pocket. b. Grasp internal drink tube between your teeth. 2-82

103 If the drinking system leaks, pinch the external drink tube where it connects to the outlet valve body to prevent inhalation of agent vapors until a replacement mask is obtained or the wearing of the facepiece is no longer required. c. Blow into internal drink tube. If resistance is not felt, drinking system is leaking. Notify unit maintenance and exchange mask as soon as possible. d. Grasp the internal drink tube between teeth and attempt to draw in air through drinking system. e. If You are able to draw in air, you have a faulty internal or external drink tube. Exchange mask as aeon as possible. 2-83

104 2-16. Removing Your Facepiece With Hood Attached a. Disconnect microphone cable and remove helmet. b. Unfasten underarm straps (l). CAUTION Be very careful when removing hood. The hood could snag on the buckles of the head harness and tear. c. Loosen cord (4). d. Unzip the zipper (2) by holding the lower part of the zipper and pulling the slider (3) upward. 2-84

105 e. f. g. Place both hands on back edge of hood skirt (5) and raise the hood above your head and pull over front of facepiece. Loosen cheek straps. Place one hand on the front voice mitter to hold facepiece on face and with other hand grasp head bar. ness tab and pull over the front of remove facepiece. the head harness the facepiece and h. Replace helmet. 2-85

106 2-17. Stowing Your Mask and Additional Authorized Items WARNING Any solid matter (even grass) under valve disks will cause fogged eyelenses, discomfort, and leakage. CAUTION Abrasives such as sand and grit will scratch eyelenses. outserts are installed on the facepiece in the carrier. Be sure the NOTE Facepiece can be stowed with or without the hood attached. hood from facepiece, refer to para To remove 2-86

107 a. Check that outserts are installed on facepiece (para 3-3c). b. Check that your facepiece is dry and free of oil and solvents before stowing. c. Check that interior of carrier is free of dirt and trash or other unauthorized items. CAUTION To avoid damage to facepiece, put only authorized items in your carrier. d. Stow the other outserts, waterproof bag, and operator s manual in inside pockets of carrier. e. If issued the following items, stow as follows: Detector paper stow in inside left pocket of carrier. M258A1 decontaminating kit - stow in outside bottom pocket of carrier. 2-87

108 2-17. Stowing Your Mask and Additional Authorized ltema-(cent) f. g. h. i. j. Install canister and canister carrier in carrier pocket with quick disconnect coupling through aide opening in carrier. Ensure that hose is pointing toward the opening. Fold canister carrier straps and place in pocket with canister. Close canister carrier pocket. Hold front of facepiece in a horizontal position and smooth the hood over it. 2-88

109 k. Pull head harness (1) over front of facepiece. 2-89

110 2-17. Stowing Your Mask and Additonal Authorized Items-(Cont) l. Fold the two edges of the hood over the outlet valve to create a V in the front of the hood. m. Store the ends of underarm straps and cord in the V. CAUTION To prevent crushing the microphone, do not apply force to microphone connection when stowing facepiece. 2-90

111 n. Grasp bottom of hood around hose and tuck into space beneath canister carrier pocket. 2-91

112 2-17. Stowing Your Mask and Additional Authorized Items-(Cont) O. Continue to feed as much as possible of the hood and hose into carrier. P. Place the facepiece over the canister carrier pocket with eyelenses facing toward carrier opening. At this point facepiece will be upside down. 2-92

113 NOTE To stow facepiece after hood has been removed, fold hood as in steps l and m. Place hood and facepiece in carrier as instructed in steps n, o, and p. q. Close carrier. r. s. t. Close outside canister pocket. Store your facepiece in closed carrier in a cool, dry, dark place. It is preferable to hang carrier (2) by shoulder strap (3) or hook (4) on short strap. 2-93

114 2-18. Removing Hood From Facpiece CAUTION Be very careful in removing hood. of head harness and tear. The hood could snag on the buckles To prevent damage to microphone cable and connections on facepiece, be careful when removing hood. NOTE The hood can be removed from the facepiece only after the facepiece and hood have been removed from the head. a. Remove canister and canister carrier from hose (para 3-2a). b. Remove outserts (para 3-3a). 2-94

115 c. d. e. f. g. h. i. Unfasten hook and pile fasteners (1) on hood. Starting with either eyelens, stretch the eyelens openings and remove from eyelenses (2). Stretch hood and pull away from side voicemitter (3). Gently remove hood from front voicemitter (4) on facepiece. Carefully remove facepiece from inside of hood while sliding the hood down and off of the hose (5). Reinstall outserts to facepiece (para 3-3c). Reinstall canister carrier and canister (para 3-2b). 2-95

116 2-19. Wearing Your Mask Carrier (Three Ways) a. The shoulder carry method is as follows:. Attach shoulder strap D-ring (1) to hook (2) on carrier and adjust.. Hook waist strap (3) to round ring (4) and adjust. 2-96

117 2-97

118 2-19. Wearing Your Mask Carrier (Three Ways)-(Cont) c. The pistol belt method is as follows: 2-98

119 2-20. a. b. c. Wearing the Canister Carrier Without the- Mask Carrier Remove the canister carrier from the mask carrier. Snap the shoulder strap hook (1) into the D-ring (2) and place the shoulder strap over the head and on the right shoulder and adjust the strap. Place the waist strap (3) around your waist and snap the hook (4) into the D-ring (5) and adjust. 2-99

120 2-21. Operation of Additionally Authorized ltems(appc) a. Optical Inserts. WARNING Do not lenses piece. wear contact with your face- NOTE Ensure head harness is over front of facepiece. Remove optical inserts before turning in mask. (1) Place inserts in facepiece with tips of lower portion (1) of wire frame pointing toward you

121 (2) Insert lower portion (1) of wire frame into bottom of lens cavities. (3) Insert and guide upper portion (2) of wire frame into top of lens cavities, ensuring that wire frames are seated beneath the four retainers (3) in each lens opening. HOOD NOT SHOWN FOR CLARITY. b. M8 Chemical Agent Detector Paper. Refer to cover of book containing M8 chemical agent detector paper for operating instructions. c. M258A1 Decontaminating Kit. Refer to TM for operating instructions

122 2-22. Operation In Unusual Weather SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS CAUTION Keep facepiece dry. Moisture could clog the canister or saturate absorbent material and make it useless. NOTE Always use facepiece with outserts installed when operating in cold climate to help prevent fogging. a. General Instructions You Must Follow In Cold Weather. (1) During periods between repeated uses, take facepiece out of carrier and shake or flex facepiece to remove ice and snow. CAUTION. Do not warm the facepiece near a heater or open flame. rubber parts of facepiece could melt. The silicone (2) Warm facepiece when you can

123 (3) Dry facepiece with cheesecloth (item 3, app D), in a warm indoor area. Carefully dry outlet and nosecup valves. (4) Before entering a warm area from subzero temperatures, remove frost and snow from facepiece. (1) Perform the normal procedure for putting on your facepiece and hood (para 2-11), but keep in mind the following points in cold weather. (2) Remove helmet, mittens, and gloves, and make other adjustments to your garments as necessary to put on your facepiece properly. WARNING In cold weather do not clear facepiece by exhaling a large volume of air. Moist air will frost eyelenses and impair vision. (3) Exhale slowly and lightly. If you feel resistance when exhaling, the outlet valve may be sticking

124 2-22.Operation In Unusual Weather-(Cont) (4) If outlet valve disk (1) sticks to outlet valve seat, do the following: Lift bottom of outlet valve cover (2). Massage outlet valve disk (1) with one finger, only when you exhale, until Outlet valve disk (1) functions properly. Reseat bottom of outlet valve cover (2). (5) Check your facepiece for leaks (para 2-12). (6) Resume normal breathing

125 WARNING In toxic atmosphere, do not break the seal between your facepiece and the side of your face when putting on your helmet. This could cause the facepiece to leak. (7) Put on gloves, mittens, and helmet as necessary. NOTE When wearing a facepiece in extremely cold weather, you will probably feel resistance to your breathing. This will lessen as you become accustomed to the facepiece. Resistance may increase while you are working and when you are tired. If you become overheated in extremely cold weather, do not remove your facepiece outdoors until your face and head have cooled and any sweat has dried. Frostbite may result if facepiece is removed while your face is still wet

126 2-22. Operation In Unusual Weather-(Cont) (1) Remove mittens and gloves as necessary. (2) Unfasten outer garment at neck and remove helmet. (3) Unmask and shake ice accumulation from facepiece. (4) Stow mask (para 2-17). (5) Put on helmet and fasten outer garment. (6) Put on gloves and mittens if necessary

127 CHAPTER 3 MAINTENANCE INSTRUCTIONS SECTION I LUBRICATION INSTRUCTIONS No lubrication is required for the mask. Perform PMCS procedures (table 2-1). SECTION II. TROUBLESHOOTING 3-1. General SECTION II. MAINTENANCE PROCEDURES a. This section contains step-by-step procedures for maintaining the mask and additionally authorized items. b. You, the operator, are authorized to inspect and service the mask and additionally authorized items. It is your responsibility to notify your NBC NCO or officer of all defects and of maintenance requirements not authorized in this manual. 3-1

128 3-2. Canister Servicing 3-2 a. Removal. (1) Remove canister cover (1) by pressing in and rotating counterclockwise. (2) Check the connectors of canister, mating surfaces of the facepiece and areas between these surfaces for dirt or other foreign material which could allow contaminated air into your facepiece. (3) Remove the canister (2) by unscrewing counterclockwise from the hose (3) and removing from canister carrier (4). b. Installation. (1) Insert canister (2) into canister carrier (4)

129 WARNING Make sure the gasket (5) is present in the hose fitting (6) before connecting the canister to the hose. A missing gasket will affect the seal and will allow the wearer to inhale contaminated air. (2) Position hose (3) on canister (2). Tighten canister (2) by screwing clockwise into hose (3) while holding hose securely. 3-3

130 3-2. Canister Servicing-(Cont) b. Installation - (Cont) (3) Position canister carrier cover (1) on canister carrier (4) and press in on canister carrier cover (1) while rotating clockwise Outserts Servicing Removal. (1) Lift rubber ring (1) of outsert (2) from behind eyering (3). (2) Pull outsert (2) from facepiece. 3-4 (3) Repeat steps 1 and 2 for other outsert.

131 b. Cleaning. Clean and polish outserts with polish (item 6, app D). c. Installation. NOTE Be sure to install right outsert on right eyelens and left outsert on left eyelens. (1) Fold rubber ring (1) forward all around edge of outsert (2). (2) Lay outsert (2) over eyering (3) and turn rubber ring (1) down all around eyering (3). (3) Repeat steps 1 and 2 for other outsert. 3-5

132 3-4. Mask Servicing a. Decontaminating. CAUTION DS2 may damage the voicemitters of the facepiece. When exposed to DS2, splash voicemitters with clean water. Do not wet the canister. (1) Use the M258A1 skin decontaminating kit according to instructions in TM (2) Refer to unit SOP for complete decontamination procedures. b. Cleaning. CAUTION Wash the facepiece carefully so that the microphone does not get wet. NOTE When you clean your mask, use only potable water. for supplies or assistance if needed. See your NBC NCO 3-6

133 You will need the following items to clean your facepiece: Alcohol (item 4, app D) Pail (item 5, app D) Brush (item 1, app D) Cheesecloth (item 3, app D) polish (item 6, app D) Soap (item 7, app D) (1) Remove canister (if instal led) (para 3 2a), outserts (para 3-3a), and hood (para 2-18). (2) Set canister aside, away from cleaning operations. (3) Pull quick disconnect coupling (1) out of retainer on side of outlet valve cover. 3-7