TM  10-8110-201-14&P Section IV. MAINTENANCE OF DRUM ASSEMBLY (FUEL OR WATER) 3-5. General. This  section  contains  instructions  for  replace- ment   of   the   drum   assembly,   coupler   valve assembly,  check  valve  assembly,  adapter/faucet valve  assembly  and  emergency  repair  of  the  drum casing. 3-6. Drum Assembly. a. Removal.  Stop the pump assembly and pro- ceed  as  follows: (1) Turn handwheel (fig. 3-2) clockwise to close the  valve. (2) Disconnect  the  coupler  valve  assembly from the check valve assembly adapter. (3) Place  dust  cap  on  adapter. (4) Remove  the  drum  assembly. b.  Inspection  and  Cleaning. (1) Inspect  the  coupler  valve  assembly  (fig.  3-3) for loose or missing gaskets, corroded or stuck valve and cracked or missing parts. (2) Using  a  mild  soap  and  water  solution  with  a stiff bristle brush, remove any foreign matter from the exterior of the coupler valve assembly. Allow it to  dry. c. Coupler Valve Assembly and Check Valve Assembly Adapter Replacement. (1) Disconnect the hose assembly (fig. 3-4) from the coupler valve assembly. (2) Disconnect  the  coupler  valve  assembly from the check valve assembly adapter. NOTE Install the dust cap on the check valve assembly  adapter. (3) Using   a   pointed   instrument,   remove damaged  gaskets  (fig.  3-3)  from  the  coupler  valve assembly. (4) Using  a  blunt  instrument,  install  ser- viceable gaskets in the coupler valve assembly. (5)  Connect   serviceable   coupler   valve assembly to the check valve assembly adapter. (6) Connect the hose assembly (fig. 3-4) to the coupler  valve  assembly. d. Installation. (1) Remove the dust plug from the female coupling half on the pressure control (fig. 2-2) and connect and discharge hose to the pressure control. (2) Remove  the  dust  cap  from  the  main  coupl- ing half of the pressure control and connect the hose assembly to the pressure control. (3) Remove the dust plugs from the openings in the coupler valve assembly and close the valve by  turning  the  handwheel  (fig.  3-2)  clockwise. (4) Install  the  2  inch  (5.08  cm)  female  coupler of the coupler valve assembly on the check valve assembly   adapter. (5)  Install  the  main  coupler  of  the  hose assembly in the 1-1/2 inch (3.81 cm) female coupler valve  assembly. e.  Faucet  Valve  Assembly  Replacement. (1) Empty  drum. (2) Remove  defective  faucet  valve. (3) Clean  threads  in  drum  valve  boss. (4) Install serviceable faucet valve. 3-7. Drum Casing Emergency Repairs (Using Type I Repair Kit). a. Repair (Exterior). Holes in the drum casing not  greater  than  3/8  inch  (0.9525  cm)  will  be repaired as follows: (1) When necessary, insert a wood plug (6, fig. 3-5)  in  the  hole  to  temporarily  stop  the  leak. (2) Roll drum over to position the plugged hole at the highest point on the drum. (3) Put on the face protective hood (4). (Fuel drums  only). (4) Using the rotary cutter (5) cut a clean edge around  the  hole. (5) Push the conical end of a mechanical patch assembly (7) through the prepared hole, and pull the  patch  tight  against  the  interior  of  the  drum wall. (6) Using  the  pliers  (1)  tighten  the  nut  on  the patch  assembly  against  the  exterior  drum  wall. (7) Using the pliers, cut off the excess patch assembly  shank. 3-5