TM  10-4320-344-10 Table   2-9. Description of Model US636HCCD-1 Engine and Trailer Controls and Indicators. Item Number 1 2 3 4 5 6 Description Oil  Dipstick Rear  Jack  Turncrank Tongue  Jack Turncrank Fuel  Tank  Cap Fuel  Level  Gauge Park  Brake  Lever Function Used  to  determine  oil  level  in  crankcase. Dipstick   is marked   with   two   lines. The  lower  mark  means  add  oil and  the  upper  mark  means  full. Used  to  raise  and  lower  rear  jacks  and  level  trailer for   operation   when   disconnected   from   towing   vehicle. Used   to   raise   and   lower   tongue   and   support   trailer when   disconnected   from   towing   vehicle. Also   used   to level   trailer   for   operation   and   to   facilitate connecting/disconnecting   trailer   to/from   towing vehicle. Prevents   entry   of   foreign   matter   into   fuel   tank. Remove   to   add   fuel   to   tank. Indicates   amount   of   fuel   in   tank. Range  is  E  (empty) to   F   (full). Used   to   lock   wheels   when   trailer   is   disconnected   from towing   vehicle. pull   lever   toward   front   of   trailer   to lock   wheels. Turn   lever   end   cap   to   adjust   brake   cable tension. SECTION   II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) 2.2   GENERAL. Figures   2-10,   2-11,  and  2-12,  PMCS  routing  diagrams,  and  Tables  2-10,  2-11,  and 2-12,   PMCS   tables,   have   been   provided   so   you   can   keep   your   equipment   in   good operating  condition  and  ready  for  its  primary  mission. 2.2.1 Warnings and Cautions. Remove   all   jewelry   prior   to   performing   PMCS. Always observe the WARNINGS and CAUTIONS appearing in cautions   appear   before   applicable   procedures. CAUTIONS   to   prevent   serious   injury   to   yourself from  being  damaged. your  PMCS  table. Warnings  and You must observe these WARNINGS and and   others   or   prevent   your   equipment 2.2.2  Explanation of Table Entries. 2.2.2.1   Item No. Column. Numbers   in   this   column   are   for   reference. When  completing  DA Form   2404   (Equipment   Inspection   and   Maintenance   Worksheet),   include   the   item   number for   the   check/service   indicating   a   fault. Item   numbers   also   appear   in   the   order that  you  must  do  checks  and  services  for  the  intervals  listed. 2.2.2.2  Interval Column. This   column   tells   you   when   you   must   do   the   procedure   in   the procedure   column. BEFORE   procedures  must  be  done  before  you  operate  the  equipment for   its   intended   mission. DURING   procedures  must  be  done  during  the  time  you  are operating  the  equipment  for  its  intended  mission. AFTER  procedures  must  be  done immediately  after  you  have  operated  the  equipment. 2.2.2.3    Location,  Check/Service  Column. This   column   provides   the   location   and   the   item to  be  checked  or  serviced. The   item   location   is   underlined. 2-15