TM  5-4930-207-34P Section  I.  INTRODUCTION 1.  Scope.   This   manual   lists   spares   and   repair parts;  special  tools;  special  test,  measurement,  and diagnostic   equipment   (TMDE),   and   other   special support   equipment   required   for   performance   of organizational,   direct   support,   and   general   sup- port  depot  maintenance  of  the  Lubricating  Unit.  It authorizes   the   requisitioning   and   issue   of   spares and   repair   parts   as   indicated   by   the   source   and maintenance   codes. 2.  General.   This   Repair   Parts   and   Special   Tools List is divided into the following sections: a.  Section  II.  Repair  Parts  List.  A  list  of  spares and   repair   parts   authorized   for   use   in   the   per- formance   of   maintenance.   The   list   also   includes parts   which   must   be   removed   for   replacement   of the   authorized   parts.   Parts   lists   are   composed   of functional  groups  in  ascending  numeric  sequence, with  the  parts  in  each  group  listed  in  figure  and item  number  sequence.  Bulk  materials  are  listed  in NSN  sequence. b.   Section   III.   Special   Tools   List.   A  list  of special   tools,   special   TMDE,   and   other   special support  equipment  authorized  for  the  performance of  maintenance. c.  Section  IV.  National  Stock  Number  and  Part Number  Index.  A  list,  in  National  Item  Identifica- tion   Number   (NIIN)   sequence,   of   all   National Stock   Numbers   (NSN)   appearing   in   the   listings, followed  by  a  list  in  alphanumeric  sequence  of  all part   numbers   appearing   in   the   listings.   National stock   numbers   and   part   numbers   are   cross- referenced   to   each   illustration   figure   and   item number   appearance.   This   index   is   followed   by   a cross-reference   list   of   reference   designators   to figure  and  item  numbers. 3. Explanation of Columns. a.  Illustration.  This   column   is   divided   as follows: (1)  Figure  Number. Indicates   the   figure number   of   the   illustration   on   which   the   item   is shown. (2)  Item  Number.  The  number  used  to  identify item  called  out  in  the  illustration. b.  Source, (SMR)  Codes. Maintenance   and   Recoverability (1)   Source   Code.   Source   codes   indicate   the manner o f    a c q u i r i n g    s u p p o r t    i t e m s    f or maintenance,   repair   or   overhaul   of   end   items. Source   codes   are   entered   in   the   first   and   second positions   of   the   Uniform   SMR   Code   format   as follows: Code PA PB PC PD PE PF PG KD KF KB Definition Item    procured a n d    s t o c k e d    f or anticipated  or  known  usage. Item  procured  and  stocked  for  insurance purposes   because   essentiality   dictates that  a  minimum  quantity  be  available  in the  supply  system. Item   procured   and   stocked   and   which otherwise   would   be   coded   PA   except that  it  is  deteriorative  in  nature. Support   item,   excluding   support equipment,   procured   for   initial   issue   or outfitting  and  stocked  only  for  subse- quent  or  additional  initial  issues  or  out- fitting. Not   subject   to   automatic replenishment. Support   equipment   procured   and stocked  for  initial  issue  or  outfitting  to specified   maintenance   repair   activities. Support   equipment   which   will   not   be stocked  but  which  will  be  centrally  pro- cured  on  demand. Item   procured   and   stocked   to   provide for  sustained  support  for  the  life  of  the equipment.   It   is   applied   to   an   item peculiar   to   the   equipment   which, because  of  probable  discontinuance  or shutdown  of  production  facilities,  would prove   uneconomical   to   reproduce   at   a later  time. An   item   of   a   depot   overhaul/repair   kit and  not  purchased  separately.  Depot  kit defined  as  a  kit  that  provides  items  re- quired  at  the  time  of  overhaul  or  repair. An   item   of   a   maintenance   kit   and   not purchased   separately.   Maintenance   kit defined   as   a   kit   that   provides   an   item that  can  be  replaced  at  organizational  or intermediate  levels  of  maintenance. I t e m    i n c l u d e d    i n    b o t h    a    d e p ot overhaul/repair   kit   and   a   maintenance kit. 1