Air Cub Breathing Apparatus Pressure Demand Type BEFORE USE 1. THOROUGHLY CHECK OUT THIS APPARATUS ON RECEIPT PRIOR TO USE. 2. FOR USE ONLY BY QUALIFIED TRAINED PERSONNEL. 3. CAUTION:     WEAR     IMPERMEABLE          PROTECTIVE     CLOTHING     FOR EXPOSURE  TO  GASES  AND  VAPORS  WHICH  CAN  POISON  BY  SKIN ABSORPTION. 4. UNDER NO CIRCUMSTANCES SHOULD THIS APPARATUS BE USED AS AN UNDERWATER DEVICE. WARNING 1. This device may not provide satisfactory face seal with certain physical characteristics   (such   as   beards   or   gross   sideburns),   as   outlined   in ANSI Z88.2-1969, resulting in leakage in connection with the facepiece, which voids or limits the protection.  If such a condition exists, the user assumes all risks of death or serious bodily injury which may possibly result. 2. Never use any lubricated on any part of the apparatus and always keep all parts entirely free from oil and grease. INSTRUCTIONS FOR USE AND MAINTENANCE The  MSA  Pressure  Demand  Air  Cub  provides  complete  respiratory  protection and  is  approved  by  the  Mining  Enforcement  and  Safety  Administration  (MESA) and  National  Institute  for  Occupational  Safety  and  Health  (NIOSH)  as  a  "15- minute duration" unit.  This apparatus can be used at temperatures down to -25 F however a nosecup must be used at temperatures below +32° F.  The Air Cub also  provides  an  Audi-Larm  Signal  which  automatically  cocks  when  the  cylinder valve is opened.  Its loud clear warning signal provides sufficient time for safely leaving  hazardous  atmospheres.    The  Demand  Regulator  is  spring  loaded  to provide   a   positive   pressure   in   the   facepiece   during   inhalation   and   prevent possible inward leakage. The warranties made by MSA with respec t  to  this  product  are  voided  if  the product    is    not    used    and    serviced    (maintained)    in    accordance    with    these instructions for use and maintenance." PREPARATION FOR USE The   following   consecutive   steps   should   be   followed   In   putting   on   the apparatus before entering a toxic atmosphere: 1.      Check   the   pressure   gauge   In   the   cylinder   valve   to   Insure   that   the cylinder is full (2216 psi pressure).  If there is less pressure, the service life will be reduced accordingly. 2.    Put  on  the  apparatus  as  follows:  Grasp  the  large  round  ring  on  the harness  with  the  right  hand,  and  the  shoulder  pad  with  the  left  hand,  then  swing the  harness  over  the  head  so  the  shoulder  pad  is  on  the  right  shoulder.    Adjust the  regulator  strap  to  the  desired  tightness.    Fasten  the  loose  strap  (with  the snap) to the ring.  then tighten strap as much as desired. 3.  Close the By-Pass (red) handwheel on the demand regulator, then open the  cylinder  valve  handwheel  fully.    As  the  cylinder  valve  is  being  opened,  the Audi-Larm   will   ring   as   pressure   in   the   high   pressure   hose   increases.      This indicates   the   Audi-Larm   is   functional.      If   the   Audi-Larm   does   not   ring   the equipment should be checked and corrected before proceeding. 4.  Place palm of hand over the Demand Regulator outlet firmly to block it leak  tight.    This  is  necessary  as  the  Demand  Regulator  is  spring  loaded  and  air will flow automatically if the outlet is not blocked. 5.  Open the-Main-Line (yellow) handwheel fully and observe the pressure gauge on the Demand Regulator.  This gauge indicates continually the pressure in  the  cylinder  and  should  read  approximately  2200  psi  (2216  actually)  if  fully charged.    If  there  Is  less  pressure  in  the  cylinder  the  service  life  will  be  reduced accordingly.    Turn  off  the  cylinder  valve  and  watch  the  pressure  gauge  on  the regulator.  There should be no drop in pressure It the equipment is leaktight and if  there  is  noticeable  deflection  of  the  needle,  the  equipment  should  be  checked and   the   leak   corrected   before   entering   a   toxic   atmosphere.      Again   open   the cylinder valve handwheel fully.  and lock open with the lever.  Shut oft Main-Line Valve. 6.    The  facepiece  is  then  put  on  using  the  following  method:  Pull  out  the facepiece  headband  straps  so  that  the  ends  are  at  the  buckles  and  grip  the facepiece  between  thumb  and  finger  insert  the  chin  into  the  facepiece  and  pull headbands back over the head.  To obtain a firm and comfortable fit against the face at all points, adjust headband as follows: (a) See that straps lie flat against the head (b) Tighten lower or "neck" straps. (c) Tighten "side" straps (do not adjust forehead or "front strap". (d) Place both hands on headband pad and push in towards the neck. (e) Repeat operations (b) and (c). (f)  Tighten  forehead  or  "front"  strap,  if  necessary.    to  position  the  lens  for best vision. Test    the    mask    facepiece    for    tightness    by    squeezing    the    corrugated breathing tube tightly.  Inhale gently so that the facepiece collapses slightly and hold   breath   for   ten   seconds.      The   facepiece   will   remain   collapsed   while   the breath  is  held  providing  the  assembly  is  gas  tight.    If  any  leakage  is  detected around  the  facial  seal,  readjust  head  harness  straps.    If  other  than  facial  seal leakage  is  detected,  investigate  the  condition  and  correct.    The  facepiece  must be   subjected   to   a   tightness   test   before   each   use.      Connect   mask   hose   to regulator.  Open Main-Line Valve fully. 7.  Test the complete system for air flow from the cylinder to the facepiece by breathing normally.  The regulator should follow the normal breathing pattern. 8.    Test  the  By-Pass  (red)  valve  by  opening  it  briefly.    With  the  By-Pass valve open, a rush of air should be delivered to the facepiece.  If the rush of air is delivered, the apparatus is ready for use.  Close the By-Pass (red) valve. 9.    Breathe  normally  as  the   apparatus   automatically   satisfies   breathing requirements. SERVICE LIFE This  equipment  is  approved  by  MESA  and  NIOSH  as  a  "15-minute duration" unit, based on the tact that the equipment, when tested by NIOSH on  men  performing  moderate-to-heavy  work,  was  found  to  last  15  minutes or more in each of the different types of work tests. The  user  should  not  expect  to  obtain  exactly  15  minutes  service  life from this apparatus on each use.  The work being performed may be more or  less  strenuous  than  that  used  in  the  NIOSH  tests.    Where  work  is  more strenuous, the duration may be shorter, possibly as short as 8 minutes. The duration of the unit will depend on factors such as: (a) the degrees of physical activity of the user; (b) the physical condition of the user: (c)  the  degree  of  which  the  user's  breathing  is  increased  by  excitement, fear, or other emotional factors: (d) the degree of training or experience which the user has had with this or similar equipment: (e)  whether  or  not  the  cylinder  Is  fully  charged  at  the  start  of  the  work period: (f)    the    possible    presence    in    the    compressed    air    of    carbon    dioxide concentrations  greater  than  the  .04%  normally  found  In  atmospheric air: (g)  the  atmospheric  pressure:  if  used  in  a  pressurized  tunnel  caisson  at  2 atmospheres  (15  psi  gauge)  the  duration  will  be  one-halt  as  long  as when used at 1 atmosphere: and at 3 atmospheres will be one-third as long. (h) the condition of the apparatus. USE IN TOXIC ATMOSPHERE It  is  necessary  to  periodically  check  the  pressure  gauge  on  the  Demand Regulator   as   it   continually   indicates   the   pressure   in   the   cylinder.      When   the needle  reaches  approximately  540  psi  on  the  pressure  gauge.    the  Audi-Larm Signal   will   begin   ringing.      When   the   bell   starts   ringing   or   when   the   pressure reaches 540 psi.  it is time to return to fresh air. During normal use the By-Pass (red) valve is closed and is used only it the Automatic  Demand  Regulator  becomes  inoperative.    It  provides  a  continuous flow  and  should  be  opened  first,  the  Main-Line  (yellow)  handwheel  closed,  and the  By-Pass  valve  adjusted  to  provide  the  flow  desired  Leave  hazardous  area immediately  since  lite  of  apparatus  is  greatly  diminished  when  By-Pass  valve  is being used. Never  remove  the  facepiece  except  in  a  safe,  non-hazardous,  non-toxic atmosphere AFTER USE 1.  Unlock the lever on the cylinder valve and close the valve.  Do not use excessive force as the valve closes leaktight with little effort. 2.      Release   pressure   in   high   pressure   hose   by   breathing   until   air   is exhausted  and  then  remove  facepiece.    DO  NOT  USE  BY-PASS  VALVE  TO EXHAUST   AIR   PRESSURE.      Disconnect   the   hand   tight   coupling   nut   at   the cylinder valve    Do   not   disconnect   with   pressure   shown   on   the   demand regulator gauge. 3.    Loosen  the  cylinder  clamp  screw  on  the  band  with  key  screwdriver  (in strap loop).  and slide cylinder out. 4.    Replace  cylinder  with  a  lull  charged  one:  then  slide  the  cylinder,  valve end first through the band.  Place the spacer (without 0 ring) of the metal frame assembly In line with the pressure gauge on the cylinder, then tighten the screw on the band Connect the Hand Tight Coupling Nut at the Cylinder Valve. 5.    Remove  the  facepiece  assembly  and  clean  and  sanitize  it  with  MSA Cleaner-Sanitizer (Pt.  No.  34337). (a)  Add  one  package  (1  oz.)  of  powdered  Cleaner-Sanitizer  to  a  gallon  of warm water (about 120° F.) (b) Immerse facepiece and tube In the solution and scrub gently until clean. (c) Rinse in clear warm water and allow to air dry. 6.  CAUTION - Before placing mask in case.  release pressure from system as described In step No.  2 immediately above. 7.  Place cylinder in cradle of case.  Arrange harness around the lower right corner   and   front   of   case.      Place   regulator   face   down   in   plastic   dish.      Place facepiece   and   hose   assembly   on   its   side,   lens   away   from   cylinder,   between harness and cylinder. 8.  Store flat, in a cool, dry place where possible. REPAIR Replacement  or  repairs  shall  be  done  only  by  experienced  persons  with  parts designed for the apparatus.  No attempt shall be made to replace components or to make adjustment or repairs beyond the manufacturer's recommendations. Manufactured by MSA MINE SAFETY APPLIANCES COMPANY L-671 (L) Rev. 3 PITTSBURGH, PENNSYLVANIA, U.S.A..  15208 995696