TM10-3930-660-10 3-5. ENGINE   OIL   SAMPLING   VALVE   -   SERVICE   (Cont.) c. d. e. f. g. Place  a  clean  container  under  the  valve (1)  opening  (or  hose  if  used). Push  down  or  pull  upon  the  lever  (3)  to drain  approximately  one  pint  of  oil  prior to  taking  a  sample. Place  a  sample  bottle  under  the  valve opening  (or  hose  if  used)  and  fill  it  to within  1/2”  from  top.  Cap  the  bottle immediately. Install  the  dust  cap  (2)  on  the  oil sampling  valve  (1).  Return  the  oil drained  into  container  during  step  d  to the   engine. Check   oil   level   and   add   oil   if   necessary. Refer   to   LO10-3930-660-12. 3-6. TRANSMISSION   OIL   SAMPLING   VALVE   -   SERVICE This   task   covers: Obtaining   a   transmission   oil   sample   for   the   Army   Oil   Analysis   Program   (AOAP). 1.   CLEAN   THE   TRANSMISSION   OIL SAMPLING   VALVE   (l). 2.   START   THE   ENGINE,   PARAGRAPH   2-6. DRIVE   THE   VEHICLE   APPROXIMATELY ONE  MILE  OR  ALLOW  TO  IDLE  IN  GEAR FOR  A  WHILE  TO  BRING  THE TRANSMISSION   TO   NORMAL OPERATING   TEMPERATURE. 3.   WITH   THE   ENGINE   RUNNING,   PLACE THE   TRAVEL   SELECT   CONTROL   LEVER IN   NEUTRAL.   APPLY   THE   PARKING BRAKE. 4.   OBTAIN   THE   OIL   SAMPLE. a. b. Remove  the  dust  cap  (2)  on  the transmission   oil   sampling   valve   (l). Attach  an  appropriate  size  hose  to  the valve,   if   desired. 3-7