TM  10-8110-201-14&P e. f. g. h. i. j. Install  coupler  valve. Install modified dust plug (fig. 5-16). Open coupler valve by turning handle to the left. Insert air nozzle on valve stem and inflate to 6 psig. Use standard air gage to determine air pressure. Install  lifting  yoke  (fig.  5-17)  and  move  drum  to leak  test  station. 5-18.  DELETED 5-19. Testing (All Drums). a. General. Testing  is  divided  into  two  separate  cate- gories:  Pressure  Testing  and  Hydrostatic  Testing.  These tests  will  be  conducted  as  outlined  in  b  below. b. Test Procedures. (1) Pressure Test. (a) Check  all  adapters  and  faucet  valves  to insure that they are tight and properly seated. (b) Check all end plate capscrews to insure that they have been torqued to 30 foot pounds (4.54 m-kg). (c) Install  the  air  inflation  and  gaging  equip- ment (fig. 5-16) and inflate the drum to 6 psi (0.42 kg/sq cm). (d) Spray the inflated drum thoroughly with a detergent and water solution. After allowing a time lapse of approximately 5 minutes for normal expansion, add air, as required, to bring the internal pressure back to 6 psi (0.42 kg/sq  cm). (e) Inspect  the  drum  surface  and  end  playes  for evidence of air leakage (frizzing or bubbling (fig. 5-18)). check the air pressure after a one hour time lapse and again after a two hour time lapse. Any loss of pressure from the original 6 psi (0.42 kg/sq cm) during the second hour will verify the presence of a leak and a requirement for repair. Serviceable  drums  will  be  drained  and  thoroughly  dried (para  5-20). (2) Hydrostatic Test. (a) Remove  air  inflation  and  gaging  equipment and deflate the drum. (b) Position  the  drum  with  the  opening  at  the  top and  fill  the  drum  with  water  (fig.  5-19). (c) Continue  falling  until  the  internal  pressure  of 30   psig   is   attained. (d) After allowing a time lapse of 5 minutes after filling to permit normal expansion, add air as required (fig.  5-16)  to  bring  the  internal  pressure  back  to  the  speci- fied  limit. (e) Allow the pressurized drums to stand for 30 minutes. (f) At the end of the specified stand period check the  external  surface  of  the  drum  for  obvious  evidence  of leakage  and  check  the  internal  pressure  for  pressure  drop (fig.  5-20). (g) Clearly mark any leak points and return the unserviceable drum for repair. Serviceable drums will be drained  and  thoroughly  dried  (para  5-20). 5-20.  Drying  Drum  After  Testing. Hot air must not exceed 150° F (66°C). a. Suspend drum by one end and dry interior with hot air for approximately 5 minutes, until interior of drum is completely dry (fig. 5-21). NOTE Water in depressions can be located by feeling the exterior of the drum. Where water has settled the temperature of the drum exte- rior will be cooler than the sur- rounding  area. b.  Insert  1/2  inch  (1.3  cm)  L-shaped  copper  tubing  in depressions  to  siphon  out  water.  The  internal  air  pressure will cause the water to flow through the tubing. 5-21. Fogging and Crating Drum (500 Gallon (1893 Liter) Fuel Drums Only). a. Inflate drum to approximately 1/2 of full size. b. Attach fogging equipment (fig. 5-22) and spray PE10 light  oil  into  the  drum  for  approximately  15  seconds. c. Allow drum to remain semi-inflated for 3 to 5 minutes so that the oil fog covers surface of the inner liner. d. Release air and fold drum into an S shape. The swivel plate should be opposite the valve end 5 - 2 4