M40 Series Protective Mask Outlet Valve Outlet Valve Seat PMCS Check List Side Voicemitter loose lock ring missing gasket reversed voicemitter (four bee bees faced outward) Lens broken cracked scratched discolored Drink Tube Quick Disconnect clogging leaking (see manual) Canister and Port damaged canister loose canister inlet valve body improperly installed/missing Outlet Valve Outlet Valve Seat damaged dirty missing corroded damaged dirty chemicaldragon.com © Internal Drink Tube coupling sheared off drinking tube missing Front Voicemitter loose retainer 1 2 SMCT Warrior Skills Level 2-4 STP 21-1 (Sep 08) STP 21-1 (Dec 06) SMCT Warrior Skills Level 1 FM 3-11.5 (Apr 06) CBRN Decontamination: FM 3-14.4 (Jun 03) CBRN Protection: Field Manuals TM 3-4240-349-12&P (Nov 99)) M41 PATS TM 3-4240-346-23& (Aug 10) M40A1/M42A2 TM 3-4240-340-10 (Feb 94) M42A1: TM 3-4240-346-10 (Aug 98) M40A1/M40A2: Operator’s Manuals chemicaldragon.com © References

Test / Fitting For Your Pro Mask For clarity, the operator may elect to explain the next test to the individual just before the Soldier must accomplish it (i.e., during exercise one explain that exercise two requires deep breathing (in through the nose and out through the mouth)). Exercise 1: Normal breathing, keeping the head motionless. Exercise 2: Deep breathing, slowly but deeply inhaling through nose and exhaling from mouth. Exercise 3: Head movement side to side, looking over each shoulder in one-second intervals. Ensure the canister does not touch shoulders while performing this exercise. Exercise 4: Ensure the canister does not touch chin while performing this exercise. Head movement up and down, looking at ceiling then floor in one-second intervals. Exercise 5: Rotate chin, moving the jaw in a circular pattern with mouth slightly open. NOTE After the fifth exercise, you will hear a series of three beeps. An overall test result will then be displayed. chemicaldragon.com © 3 M41 PATS 99.5% Pure Reagent Grade Isopropyl Alcohol: NSN 6810-01-382-2904 4 Never store a mask wet; air dry Ensure lens are facing outward Store It Right To Prevent Damage Left-handed Storage Right-handed Storage chemicaldragon.com ©

Will Cause Facepiece Cuts Folding The Mask In The Carrier Outlet Valve Will Leak If Not Clean Outlet Valve Body Remove any dirt. Outlet valve body sealing surface should be smooth; feel for irregularities with fingernail. Mask is unserviceable if damaged. Outlet Valve Disc Remove any foreign objects from disc (i.e. dirt, sand, or hair). Replace disc if damaged. chemicaldragon.com © 5 6 chemicaldragon.com © You Break It! You Fold It… Mask is unserviceable if cuts or holes exist. Caused by improper storage in the carrier. Most commonly found inside the facepiece next to the internal drink tube. Inspect facepiece for cuts or holes. Will Cause Facepiece Cuts Folding The Mask In The Carrier

Your Mask Won’t Seal With A Bad Head Harness Replace the head harness under the following conditions: When it does not hold the mask assembly firmly against your face. When it is cut, torn, or frayed. When it has missing buckles or tabs. When it is deteriorated or stretched out. (NSN: 4240-01-464-7839, part 5-1-2796) chemicaldragon.com © If Rubber Is Torn...The Mask Is Unserviceable! 7 8 Make Sure These Items Are Tight Front Voicemitter Side Voicemitter Ring To Tighten) (Use the Carrier’s “D” (Turn Clockwise- if it is loose, the mask is unserviceable) Check Tightness by Hand. Canister chemicaldragon.com © (Hand Tight)

DO DON’T Perform maintenance according to technical manuals. Use waterproof bag when required Clean according to manuals Use your outserts. Keep your mask clean. Ensure your second skin is attached. Replace worn out parts. Keep drinking system clear- ONLY DRINK WATER. Fitted with M41 PATS. Reference the TM every time. Make sure you never store food in your mask carrier. Use as a pillow. Only perform 10 Level maintenance. chemicaldragon.com © 9 10 PAST 10 LEVEL. DO NOT PREFORM MAINTENANCE Dent the canister. parts are wet. Store your mask when any of its Fold mask. unless necessary. Remove side voicemitter assembly Sit or lay on the mask/carrier. DON’T chemicaldragon.com ©