TM 1-1510-224-10 2. Remove brake reservoir cap and fill reservoir to washer on dipstick with hydraulic fluid. 3. Install brake reservoir cap. b. Servicing Hydraulic Landing Gear System. Servicing the hydraulic landing gear extension/ retraction system consists of maintaining the correct fluid level and maintaining   the   correct   accumulator   precharge.      The accumulator  is  located  in  the  reservoir  access  area  and is  charged  to  800  ±50  PSI  using  bottled  nitrogen.    A charging   gage   is   mounted   on   the   accumulator.      A reservoir,   located   just   inboard   of   the   left   nacelle   and forward   of   the   main   spar,   has   a   lid   with   a   dipstick attached marked  FLUID  TEMP  0°F,  50°F,  100°F.    Add MIL-H-5606 hydraulic fluid (consumable materials list) as required to fill the system, corrected for temperature. 2-97. INFLATING TIRES. Inflate tires as follows: a. Inflate  nose  wheel  tires  to  a  pressure  between 55 and 60 PSI. b. Inflate  main  wheel  tires  to  a  pressure  between 73 and 77 PSI. 2-98. SERVICING THE CHEMICAL TOILET. The  toilet  should  be  serviced  during  routine  ground maintenance  of  the  aircraft  following  every  usage.    The waste storage container should be removed, emptied, its disposable    plastic    liner    replaced,    and    the    container replaced    in    the    toilet    cabinet.        Toilet    paper,    waste container   plastic   liners,   and   dry   chemical   deodorant packets    should    also    be    resupplied    within    the    toilet cabinet as needed. 2-99. SERVICING THE AIR CONDITIONING SYSTEM. Servicing   the   air   conditioning   system   consists   of checking  and  maintaining  the  correct  refrigerant  level, compressor  oil  level,  belt  tension  and  condition,  system leak   detection,   and   replacement   of   the   evaporator   air filters.      It   is   imperative   that   maintenance   of   the   air conditioning   system,   except   for   filter   replacement,   be accomplished     only     by     qualified     refrigerant     system technicians. 2-100. ANTI-ICING,    DEICING,    AND    DEFROSTING TREATMENT. NOTE Do  not  apply  anti-icing,  deicing,  and defrosting   fluid   to   exposed   aircraft surfaces if snow is expected.  Melting snow  will  dilute  the  defrosting  fluid and  form  a  slush  mixture  which  will freeze  in  place  and  become  difficult to remove. The  aircraft  is  protected  in  subfreezing  weather  by spraying   the   surfaces   (to   be   covered   with   protective covers) with defrosting fluid.  Spraying defrosting fluid on aircraft  surfaces  before  installing  protective  covers  will permit  protective  covers  to  be  removed  with  a  minimum of   sticking.      To   prevent   freezing   rain   and   snow   from blowing  under  protective  covers  and  diluting  the  fluid, ensure   that   protective   covers   are   fitted   tightly.      As  a deicing measure, keep exposed aircraft surface wet with fluid for protection against frost. Use undiluted anti-icing, deicing, and defrosting fluid (MIL-A-8243)   to   treat   aircraft   surfaces   for   protection against  freezing  rain  and  frost.    Spray  aircraft  surface sufficiently  to  wet  area,  but  without  excessive  drainage. A  fine  spray  is  recommended  to  prevent  waste.    Use diluted, hot fluid to remove ice accumulations. a. Remove  frost  or  ice  accumulations  from  aircraft surfaces  by  spraying  with  diluted  anti-icing,  deicing,  and defrosting fluid mixed in accordance with Table 2-12. b. Spray   diluted,   hot   fluid   in   a   solid   stream   (not over 15 gallons per minute).  Thoroughly saturate aircraft surface and remove loose ice.  Keep a sufficient quantity of diluted, hot fluid on aircraft surface coated with ice, to prevent   liquid   layer   from   freezing.      Diluted,   hot   fluid should be sprayed at a high pressure, but not exceeding 300 PSI. c. When  facilities  for  heating  are  not  available  and it   is   deemed   necessary   to   remove   ice   accumulations from  aircraft  surfaces,  undiluted  defrosting  fluid  may  be used.      Spray   undiluted   defrosting   fluid   at   15   minute intervals  to  assure  complete  coverage.    Removal  of  ice accumulations using undiluted defrosting fluid is expensive and slow. d. If    tires    are    frozen    to    ground,    use    undiluted defrosting  fluid  to  melt  ice  around  tire.    Move  aircraft  as soon as tires are free. NOTE Do  not  apply  anti-icing,  deicing,  and defrosting   fluid   to   exposed   aircraft surfaces if snow is expected.  Melting snow  will  dilute  the  defrosting  fluid and  form  a  slush  mixture  which  will freeze  in  place  and  become  difficult to remove. 2-101