TM    9-2350-238-10 c.  If   Your Troubleshoot Equipment   Fails   to   Operate. with   proper   equipment.   Report any  deficiencies  using  the  proper  forms.  See DA   PAM   738-750. PMCS   PROCEDURES a. Perform   PMCS   each   day   vehicle   is operated.  If  vehicle  is  not  being  operated regularly,  start  and  run  engine  for  approx- imately  1/2  hour  at  least  once  a  week.  While engine  is  running,  exercise  crane  controls. Perform  only  the  PMCS  required  for  running engine   and   checking   crane   controls. b.   Perform   weekly   as   well   as   before operations  PMCS  and  check  fluid  levels  if: (1)   You   are   the   assigned   operator   and have   not   ‘operated   the   item   since   the   last weekly. (2)   You   are   operating   the   item   for   the first   time. c.  While   you   perform   PMCS,   have “checker”   tools   with   you   and   keep   an   eye out   for   the   following: (1)   Loose   bolts.   A   loose   bolt   can   be   dif- ficult   to   spot   without   using   a   wrench. However,   you   can   often   identify   loose   bolts by  observing  loose  or  chipped  paint  around bolt   head   and   bare   metal   or   rust   at   its   base. Tighten   loose   bolts. (2)   Damaged   welds.   Damaged   welds may  be  detected  by  observing  rust  or  chipped paint   where   cracks   occur. (3)   Frayed   electrical   wires   and   loose connectors.   Check   electrical   wiring   for   cracks due  to  aging  and  exposed  wires  that  could cause  an  electrical  short.  Tighten  loose clamps   and   connectors. Equipment   operation   is   allow- able  with  minor  leakages  (class I  or  11).  Of  course,  you  must consider   the   fluid   capacity   in the   item/system   being   checked/ inspected.   When   in   doubt,   noti- fy   unit   maintenance   personnel, When  operating  with  class  I  or class  II  leaks,  continue  to  check fluid   levels   as   required   in   your PMCS. Class   Ill   leaks   should   be reported   to   unit   maintenance personnel. NOTE Fluid   leakage   classifications apply   only   to   hull   components. (4)   Fluid   leakage.   Leaks   are   divided   into three   classifications.   Compare   leak   with   the following    definitions: Class  I Seepage   of   fluid   (as   in- dicated   by   wetness   or discoloration)   not   great enough   to   form   drops. Class  II Leakage  of  fluid  great enough   to   form   drops   but not  enough  to  cause drops  to  drip  from  item being   checked/inspected. Class   Ill Leakage  of  fluid  great enough   to   form   drops   that fall   from   the   item   being checked/inspected. d.  If  your  equipment  does  not  perform  as required,   refer   to   troubleshooting   procedures in  chapter  3  for  possible  problems.  Report any  malfunctions  or  failures  on  the  proper  DA Form   2404,   or   refer   to   DA   PAM   738-750. e. If  an  assembly  must  be  removed  and/or disassembled  in  order  to  perform  PMCS,  refer to   the   maintenance   procedures   in   chapter   3. Change  1 2-19