TM  9-6115-641-10 TO  35C2-3-456-11 SECTION   II. ARMY AIR  FORCE PREVENTIVE   MAINTENANCE   CHECKS   AND   SERVICES   (PMCS) 2-5  GENERAL.   To  ensure  that  the  genera- tor  set  is  ready  for  operation  at  all  times,  it must  be  inspected  so  that  defects  can  be  dis- covered  and  corrected  before  they  result  in serious   damage   or   failure. 2–5.1  Before  You  Operate.  Always  keep  in mind   the   CAUTIONS   and   WARNINGS. Perform   your   before   (B)   PMCS. 2-5.2   While  You  Operate.  Always  keep  in mind   the   CAUTIONS   and   WARNINGS. Perform   your   during   (D)   PMCS. 2–5.3   After   You   Operate.   Be  sure  to  per- form  your  after  (A)  PMCS. 2-5.4  If  Your  Equipment  Fails  to  Operate. If  your  equipment  does  not  perform  as  re- quired,   refer   to   Chapter   3   under   Trouble- shooting   for   possible   problems.   Report   any malfunctions   or   failures   on   the   proper   DA Form  2404,  or  refer  to  DA  PAM  738–750. 2-6   PMCS   PROC EDURES. For  general  location  of  the  items  to  be  in- spected  in  TABLE  2-4,  refer  to  FIGURE 1-2   and   FIGURE   2–1. 2-6.1   Purpose   of   PMCS   Table.   Your Preventive   Maintenance   Checks   and   Ser- vices  (TABLE  2–4)  list  the  inspections  and care  of  your  equipment  required  to  keep  it  in good  operating  condition. 2-6.2  Purpose of Service Intervals.   The interval  column  of  your  PMCS  table  tells  you when  to  do  a  certain  check  or  service. 2–6.3  Special  Instructions.  The   follow- ing   guidelines   have   been   provided   to   help you   in   classifying   leaks   observed   while   per- forming   PMCS. Class  I.  Seepage  of  fluid(as  indi- cated   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   III.   Leakage   of   fluid   great enough  to  form  drops  that  fall  from  the  item being   checked/inspected. CAUTION Equipment operation is allowable with mi- nor  oil  and  coolant  leakage  (Class  I  or  II) and is able to perform its combat missions (refer  to  DA  PAM  738-750). Of course, you must consider the fluid ca- pacity in the item/system being cheeked/in- spected.  When  in  doubt,  notify  the  next higher level of maintenance. When  operating  with  Class  I  or  Class  II leaks, continue to check fluid levels as re- quired in your PMCS. All leaks should be reported to the next high- er level of maintenance. d.  Procedures  Column. The  procedures column  of  your  PMCS  table  tells  you  how  to do  the  required  checks  and  services.  Care- fully  follow  these  instructions.  If  you  do  not have  the’  tools,  or  tithe  procedures  indicate, complete  a  DA  FORM  2404  and  submit  it  to the  next  higher  level  of  maintenance. e.  The  “Equipment  is  not  ready/avail- able  if ”.   This column tells you when and why the  generator  set  cannot  be  used. NOTE The  terms’’  ready/available”  and  “mission capable”, refer to the same status: Genera- tor set is on hand and is able to perform its combat   missions,   refer   to   DA   PAM 738-750. f. Reporting  and Correcting Deficien- cies.  If  your  generator  set  does  not  perform as  required,  refer  to  Chapter  3  under  Trou- bleshooting  for  possible  problems.  Report any   malfunctions   or   failures   on   DA   Form 2404,  refer  to  DA  PAM  738-750. g.   RemovalofAssemblies/Equipment   to Perform PMCS.   There  is  no  requirement  to remove   assemblies/equipment   prior   to   per- forming  the  PMCS. 2-8 NOTE