TM 1-1500-204-23-3 (s)    Allow  finished  repair  to  air  cure  for 24 hours before use. (2) Visually   inspect   repair   for   workmanship, no loose edges, no voids and adhesive fully cured. g.  Repair/Replacement of Internal and External Support Fittings/Hangers. WARNING Acetone,    barrier    cement,    repair adhesives and its components are flammable   and   toxic.      They   can irritate skin and cause bums.  Use only with adequate ventilation and wear a NIOSH approved air- purifying    respirator    for    organic vapors.    Keep  away  from  heat  or open flame.  Wear safety glasses, gloves  and  protective  clothing  to avoid contact with skin, eyes and clothes.    If  contact  occurs,  flush areas  with  water  and  get  medical attention for eyes. Repair  or  replacement  of  internal  and  external  support fittings/hangers shall be performed as follows: (1) Clean  area  using  a  clean  cloth  (item  16, table 2-11) dampened with acetone (item 3, table 2-11). Wear gloves (item 4, table 2-11). NOTE Insure    hanger    is    reinstalled    in original  location.    Use  wax  pencil to  mark  location.    Mark  location by  drawing  outline  of  hanger  just beyond area to be buffed. (2) Buff    surface    of    fuel    cell    around    area where  hanger  is  to  be  installed,  3/8  inch  larger  in  all directions than hanger. (3) Buff hanger mounting surface. (4) Clean buffed area of fuel cell and hanger mounting surfaces with dean cloth (item 16, table 2-11) dampened   with   acetone   (item   3,   table   2-11).      Wear gloves (item 4, table 2-11). NOTE If innerliner barrier is damaged, perform innerliner barrier repair first. NOTE Mix adhesive according to manufacturer's kit instructions. (5) Prepare  repair  adhesive  (item  1,  table  2- 11)  by  transferring  entire  contents  of  Part  2  and  3  into can of Part 1.  Wear gloves (item 4, table 2-11). CAUTION Unmixed adhesive will not cure. (6) Stir adhesive mixture with tongue depressor   (item   5,   table   2-11)   for   approximately   5 minutes.      Make   certain   components   are   completely blended together. (7) Apply   a   light,   uniform   coat   of   adhesive mixture  over  buffed  area  to  no  more  than  1/8  inch  of O.D. of  buffed  are.  Use  a  brush  (item  6,  table  2-11). Remove  any  excess  from  unbuffed  area  using  a  dean cloth (item 16, table 2-11) dampened with acetone (item 3, table 2-11).  Wear gloves (item 4, table 2-11). (8) Immediately   following   step   (7),   apply   a light,  uniform  coat  of  adhesive  mixture  over  mounting surface  of  hanger.    Use  a  brush  (item  6,  table  2-11). Wear gloves (item 4, table 2-11). (9) Position   hanger   on   adhesived   fuel   cell surface.  Center hanger in area marked with wax pencil. Press  down  on  hanger  to  remove  any  air  bubbles  and insure there are no loose edges or voids under edge of flange. (10) With    gloved    fingers    wet    with    acetone (item  3,  table  2-11),  smooth  excess  adhesive  around edge of hanger. (11) Apply one strip of masking tape (item 10, table 2-11) in vertical direction first and then one strip of masking  tape  in  horizontal  direction  to  hold  hanger  in position. CAUTION Do not flex fuel cell repair area. (12) Place a 10 to 25 pound shot bag (item 23, table 2-11) on repair.  Polyethylene, waxed paper (item 24,  table  2-11)  should  be  placed  between  the  hanger and shot bag to prevent sticking of shot bag to repair. Change 2  2-53