TM 10-3610-202-14 (12)  Using  a  suitable  wrench,  remove  the  sink drain  which  passes  through  the  sink  and  into  the  drain elbow.  Remove the drain and elbow. b.  Installation.  Install the sink assembly as follows: (1) Apply Alumalastic sealer to mating surfaces of new sink and sink drain. (2) Correctly position drain elbow on new sink and install sink drain.  Wipe away any excess sealer. (3)  Apply  blue  grade  C  Locktite  sealant  to  inner surfaces of new sink retaining rim and new sink lip. (4)  Insert  new  sink  through  counter  front  panel aperture  and  position  sink  below  sink  aperture  together with any necessary spacers. (5)  Position  retaining  rim  around  sink  on  counter top. (6)  Position  the  sink  mounting  fasteners  around the underside of the sink and secure evenly. (7) Excess sealant will be forced from both inner and outer edges of the retaining rim during the tightening process.    Wipe  away  any  excess  sealant  before  it  dries. Do not use any solvent. (8)   Position   rubber   hose   portion   of   sink   drain assembly and secure hose clamps.  (See fig. 10-2.) (9) Position the headliner counter front panel and install the attaching screws. (10) Install headliner counter top drawer. (11)   Position   the   sink   shield   on   the   headliner counter    with    aft    shield    positioned    behind    the    faucet bracket.  (See fig. 10-1.) (12) Secure the sink shield with blind rivets. (13) Position the faucet bracket on the sink shield and install attaching screws. 10-3.  Sink Drain Assembly. The   sink   drain   assembly   consists   of   an   internal drain  pipe  which  angles  toward  right  side  of  shelter  to outside  drain  opening,  and  a  drain  b  -se  with  attaching coupler.  The drain assembly used in conjunction with sink assembly   for   removal   of   water   and   other   liquids   from inside  of  shelter.    A  cap  is  also  provided  on  outside  of shelter   to   prevent   dirt   or   other   material   from   clogging drain assembly. a.  Inspection.  Inspect sink drain as follows: (1)   Inspect   all   portions   of   drain   assembly   for cracks which could cause leaks. (2)   Inspect   hoses   for   condition   and   clamps   for security. (3) Ensure drain assembly is properly aligned. (4)  Pour  water  into  sink  and  ensure  there  is  no clogging or blockage present in drain assembly. (5) Inspect all metal components for signs of rust or corrosion. (6) Inspect drain plug for proper fitting. b.  Removal. NOTE Assure   that   little   or   no   liquid   is present    in    sink    drain    assembly before removal. (1)  Remove  headliner  counter  drawer  IT  to  gain access to internal portion of drain. (2)  Loosen  two  hose  clamps  and  remove  rubber hose.  (See fig. 10-2.) (3) Using a wrench (sink adapter), remove elbow pipe from adapter drain plate. (4)   Remove   drain   assembly   cap   or   uncouple outside drain hose as necessary.  (See fig. 10-2.) (5)    Remove    nuts    and    screws    which    secure coupling adapter and reducer.  Remove coupling adapter and reducer from shelter wall. (6) Discard gasket. c.    Repair.      Repair   procedures   for   the   sink   drain assembly consist of replacement of defective parts. d.  Installation. (1)   Install   new   gasket   on   shelter   wall   adapter mounting point. (2)  Install  coupling  adapter  and  reducer.    Secure coupling adapter and reducer with nuts and screws.  (See fig. 10-2.) (3)   Install   drain   assembly   cap   or   outside   drain hose as necessary. (4)   Apply   sealer   to   elbow   pipe   and   secure   to adapter drain plate with wrench (sink adapter). NOTE Adjust elbow pipe to ensure proper alignment before connecting rubber hose. (5)   Install   rubber   hose   and   secure   with   hose clamps. 10-4