OPERATOR’S MANUAL FOR CHEMICAL …

1 TM 3-4240-339-10 operator S MANUALFORCHEMICAL- biological MASK: FIELD, M40(4240-01-258-0061 -- SMALL)(4240-01-258-0062 -- MEDIUM)(4240-01-258-0063 -- LARGE) CHEMICAL - biological MASK: FIELD, M40A1(4240-01-370-3821 -- SMALL)(4240-01-370-3822 -- MEDIUM)(4240-01-370-3823 -- LARGE)This TM supersedes TM 3-4240-300-10-1, JUNE 1988 Sea back cover for warning distribution statement, and destruction OF THE ARMY1 FEBRUARY 1994 WARNINGThe soldier s safety depends on proper fitting facepiece. Injury or death can occur if the followingwarnings are not observed:The mask will not be fully effective in confined spaces when the oxygen content of the air is too CB mask has only been tested and verified to protect against all known military must check you facepiece for leaks when fitted and each time facepiece is put on.

2 A leakyfacepiece will not protect you from toxic breathing and close your eyes when putting on your facepiece. Toxic agents may be in thesurrounding air. Perform the step for putting on your facepiece quickly. You must put he facepieceon before you take another cold weather, do not clear facepiece by exhaling a large volume of air. Moist air will frosteyelenses and impair you become overheated in extremely cold weather, do not remove your facepiece outdoors until youyour face and head have cooled and any sweat has dried. Frostbite may result if facepiece isremoved while your face is still toxic atmosphere, do not break the seal between your facepiece and the side of your face whenputting on your helmet. This could cause the facepiece to - (Cont)Keep face clean unshaven face could cause a bad seal between faceand shall remove all hairpins, combs, hair knots, buns, or braids that will interfere with thefacepiece canister mating surface of the facepiece and areas between these surfacesfor dirt or foreign material which could allow contaminated air into the drinking system leaks, pinch the external drink tube where it connectsto the outlet valve body to prevent inhalation of agent vapors until a replace-ment facepiece is obtained or wearing of the facepiece is no longer not connect the drink tube to your canteen until all resting surfaces havebeen checked and are free of agents could be swallow-ed.

3 Resulting in sickness and should be taken not to break the facepiece seal when pressing in the out-let valve you feel looseness in the fit of your facepiece duringthe performance of your mission, adjust your straps inaccordance with para not drink if resistance is not felt, your drinkingsystem is unit maintenance to replacefacepiece as soon as not use facepiece if outlet valve cover or outlet valvedisk is missing or facepiece will not wear contact lenses with your solid matter (even grass) under valve disks will causefogged eyelenses, discomfort, and material (dirt or debris) in carrier may causevalves in facepiece to not store food in waterproof bag because of possibletoxic AIDFor first aid refer to FM HAZARDF ilter canisters use ASC Whetlerite Carbon which containsChromium VI is a known carcinogen if inhaledor or unusable canisters are classifiedas hazardous waste:DO NOT throw away damaged or unusable canistersas ordinary turn in damaged or unusable canisters to yourhazardous waste management office or DefenseReutilization and Marketing Office (DRMO).

4 Canisters are completely safe to handle and use if they arenot damaged in such a way that carbon leaks from unlikely event that carbon should leak, use protectionsuch as a dust respirator to cover nose and mouth and putcarbon in container such as self-sealing plastic bag; turninto hazardous waste management office or of hazardous waste is restricted by the ResourceConservation and Recovery Act as amended (42 6901 et seq).Violation of these laws is subjectto severe criminal MANUALNO. 3-4240-339-10 HEADQUARTERSDEPARTMENT OF THE ARMYWASHINGTON, 1 FEBRUARY 1994 operator ' S MANUALFORCHEMICAL- biological MASK: FIELD, M40(4240-01-258-0061 - SMALL)(4240-01-258-0062 - MEDIUM)(4240-01-258-0063 - LARGE) CHEMICAL - biological MASK FIELD, M40A1(4240-01-370-3821 - SMALL)(4240-01-370-3822 - MEDIUM)(4240-01-370-3823 - LARGE)REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSYou can help improve this MANUAL .

5 If you find any mistakes or if you know of a way to improve theprocedures, please let us know. Mail your letter or DA Form 2028 (Recommended Changes toPubllcations and Blank Forms) direct to: Technical Director, US Army Edgewood Research ,Development and Engineering Center, ATTN: SCBRD-ENL-V, Aberdeen Proving Cround, MD21010-5423. A reply will be furnished to Information ..Equipment Description ..OPERATING INSTRUCTIONSD escription and Use of operator s Controls and Indicators .Preventive Maintenance Checks and Services (PMCS) ..Operation Under Usual Conditions ..Operation Under Unusual Conditions ..MAINTENANCE INSTRUCTIONSL ubrication Instructions ..Troubleshooting ..Maintenance Procedures ..1-11-32-12-112-512-1003-13-13-1iiPAGEA PPENDIX ..A-1 COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTI ntroduction.

6 B-1 Components of End Item ..B-3 Basic Issue Items List ..B-4 ADDITIONAL AUTHORIZATION LISTI ntroduction ..C-1 Additional Authorization List ..C-2 EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LISTI ntroduction ..D-1 Expendable/Durable Supplies and Materials List ..D-3iiiM40/M40A1 CHEMICAL biological MASK (FIELD)1-0 CHAPTER 1 INTRODUCTIONSECTION 1. GENERAL INFORMATION1-1. Scopea. Type of MANUAL . operator 's Manual1b. Model Number and Equipment Name. CHEMICAL - biological mask: field, M40 of Equipment. To protect your face, eyes, and lungs from field concentrations ofchemical- biological (CB) agents, toxins and radioactive fallout Special Limitations on Equipment. Does not protect against ammonia or carbon monoxide not protect you in closed spaces where there is not enough oxygen in the Maintenance Forms and RecordsDepartment of the Army forms and procedures used for equipment maintenance will be thoseprescribed by DA PAM 738-750, The Army Maintenance Management System (TAMMS).

7 1-11-3. Reporting Equipment Improvement Recommendations (EIR s)If your mask needs improvement, let us us an ,the user, arethe only one who can tell us what you don t like about your us knowwhy you don t like the design or it on an SF 368 (Quality Defi-ciency Report).Mail it to us at Commander, US Army Armament, Munitions and Chemi-cal Command, ATTN:AMSMC-QAD (R), Rock Island, IL ll send you Corrosion Prevention and ControlCorrosion Prevention and Control (CPC) of Army materiel is a continuing is important that any corrosion problems with this item be reported so that theproblem can be corrected and improvements can be made to prevent the problem in fu-ture corrosion is typically associated with rusting of metals, it can also includedeterioration of other materials such as rubber and cracking,softening,swelling, or breaking of these materials may be a corrosion a corrosion problem is identified,it can be reported using Standard Form 368,Quality Deficiency Report.

8 Use of key words such as corrosion , rust , "cracking or deterioration will assure that the information is identified as a CPC form should be submitted to Commander, U. S. Army Armament , Munitions and Chemi-cal Command ATTN:AMSMC-QAD, Rock Island, IL II. EQUIPMENT DESCRIPTION1-5. Equipment Characteristics, Capabilities, and Featuresa. and stored in carrierFacepiece is made of silicone rubber with inturned sealing surface so it can form a seal onyour skin for additional protection from liquid agents. (M40A1 only)Quick doff hood for easy donning/doffing operations. (M40A1 only)Includes both clear and neutral gray quickly and easily Capabilities. When worn with proper canister installed, the facepiece protects face, eyes, andlungs from concentrations of CHEMICAL - biological (CB) agents, toxins, and radioactive fallout canister may be installed on either side of the Features.

9 Major features of the mask are the silicone rubber facepiece which provides a sealagainst CB agents, a canister which filters particulate matter and agents from air, side and frontvoicemitters which transmit the user s voice outside the facepiece, an outlet valve, and a drink tubewhich allows the soldier to drink while wearing the facepiece, and quick doff hood that facilitates easydonning/doffing operations (M40A1 only).1-6. Equipment Dataa. Tabulated (with carrier) M40 and M40A1 lbs. ( )Dimensions (with carrier)9 x 11 x in. ( x x cm)b. Shipping and Storage DataNumber and type of pack .. 8 masks in individual fiberboard boxes per fiberboard containerFiberboard box Dimensions .. x x in.

10 ( x x cm)1-4 CHAPTER 2 OPERATING INSTRUCTIONSS ection l. DESCRIPTION AND USE OF operator S CONTROLS AND INDICATORS2-1. GeneralBefore attempting to use the mask and additionally authorized items, make certainyou are familiar with the location and operation of all Description of (1) fits closely againstyour face to form a ismade of silicone HARNESS (2) consists of a head-pad, forehead straps, temple straps,cheek straps,and donning facepiece to your VALVE DISK (3) allows filteredair to enter the facepiece and pre-vents moist exhaled air from enter-ing the Description of Mask - (Cont)NOSECUP VALVE DISK(4) allows filter-ed air to enternosecup and pre-vents moist exhaledair from foggingeyelenses in VALVE DISK(5) releases ex-haled air and pre-vents unfilteredair from enteringthe VALVE COVER(6) protects theoutlet valve AND SIDEVOICEMITTERS ( 7 )transmit your voiceoutside of DRINK TUBE (8)