technical manual operator instructions

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SECTION III. THEORY OF OPERATION (CONT) 1.12.2 Exhalation. As the soldier exhales, the inlet valve disk seats against the inlet valve gasket to prevent the soldier from inhaling exhaled air. Also, the nosecup valve disks seat against the nosecup seats to prevent exhaled air from entering the eye cavity which results in fogging of the eyelenses. Exhaled air is then directed to the outlet valve disk, which is forced open. The overall result of the outlet valve disk opening the nosecup and inlet valve disks closing is that the facial seal is maintained. Exhaled air flows past the outlet valve disk and into the outlet valve cover, where it is directed outside the mask 1-15 Figure 3. Exhalation
SECTION III. THEORY OF OPERATION (CONT) 1.12.3 Additional Features. The M45 mask also provides the user with face-to-face, phone and aircraft communication capabilities as well as a drinking capability. Face-toface and phone communication is provided by voicemitters, which contain grills and thin membranes. The grill protects the membrane, which allows sound to pass through it but not CB agents. Aircraft communication is provided by a microphone and microphone cable, which connect at the outlet valve housing. The microphone cable may be connected to the aircraft helmet to interface with aircraft communications. The drinking system consists of internal and external drink tubes. When connected to the M1 canteen cap, the external drink tube coupling plunger is pushed back by the cap pin. This creates an opening in the coupling, so that liquid may pass through it and into the soldier's mouth via the internal drink tube. When not in use, the plunger inside the external drink tube coupling seats to prevent air or liquids from entering the internal drink tube and facepiece. 1-16
Page 1 and 2: TM 3-4240-341-10 TECHNICAL MANUAL O
Page 3 and 4: WARNING SUMMARY This publication de
Page 5 and 6: WARNING SUMMARY (CONT) o You must c
Page 7 and 8: EXPLANATION OF SINGLE HAZARD SYMBOL
Page 9 and 10: HEALTH/ENVIRONMENTAL HAZARD Filter
Page 11 and 12: TABLE OF CONTENTS (CONT) APPENDIX A
Page 13 and 14: Fig 1. Mask, Chemical-Biological: M
Page 15 and 16: SECTION I. GENERAL INFORMATION (CON
Page 17 and 18: SECTION I. GENERAL INFORMATION (CON
Page 19 and 20: SECTION II. EQUIPMENT DESCRIPTION A
Page 27: SECTION III. THEORY OF OPERATION (C
Page 31 and 32: 2.1.1 General (CONT). a. Perform PM
Page 33 and 34: 2.1.2 PMCS Procedures (CONT). f. Th
Page 35 and 36: Table 2-1. PREVENTIVE MAINTENANCE C
Page 67 and 68: 2.2 MANDATORY REPLACEMENT PARTS. Th
Page 69 and 70: 2.4 DONNING YOUR MASK (CONT). c. Pu
Page 71 and 72: 2.4 DONNING YOUR MASK (CONT). f. Bl
Page 73 and 74: 2.5 FIT CRITERIA. a. Verify the fit
Page 75 and 76: 2.6 PUTTING YOUR MASK ON IN COLD WE
Page 77 and 78: 2.7.1 CONNECTING THE DRINKING SYSTE
Page 79 and 80:
2.7.1 CONNECTING THE DRINKING SYSTE
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2.8 REMOVING YOUR MASK. a. Disconne
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2.9 STOWING YOUR MASK AND ADDITIONA
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2.9 STOWING YOUR MASK AND ADDITIONA
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2.10 WEARING YOUR MASK CARRIER (CON
Page 89 and 90:
2.12 INSTALLATION OF HOOD. a. Remov
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2.13 WEAR AND LOCATION OF THE CANIS
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No lubrication is required for the
Page 95 and 96:
3.2 CHECKING YOUR MASK FOR LEAKS (C
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3.4 CLEANING (CONT). c. Soak brush
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3.4 CLEANING (CONT). m. Clean outsi
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APPENDIX A REFERENCES A-1. SCOPE. T
Page 103 and 104:
APPENDIX B COMPONENTS OF END ITEM A
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B-3. EXPLANATIONS OF COLUMNS (CONT)
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APPENDIX C ADDITIONAL AUTHORIZATION
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SECTION II. ADDITIONAL AUTHORIZATIO
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D-2. EXPLANATION OF COLUMNS (CONT).
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DID WE GOOF? DO YOU KNOW A BETTER W
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