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Section   L   INTRODUCTION
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TM-10-6640-219-13P Labline Explosion Proof Refrigerator (Model 3667) Manual
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Explanation   Of   Columns   In   Tool   And   Test   Equipment   Requirements,   Section   III.
T M 1 0 - 6 6 4 0 - 2 1 9 - 1 3 &P i.   Repair.   The   application   of   maintenance   services,   Including   fault   location/troubleshooting,2 removal/installation,   and   disassembly/assembly   procedures,³   and   maintenance   actions,4 to   identify troubles  and  restore  serviceability  to  an  item  by  correcting  specific  damage,  fault,  malfunction,  or  failure in   a   part,   subassembly,   module   (component   or   assembly),   end   item,   or   system. j.   Overhaul.   That   maintenance   effort   (service/action)   prescribed   to   restore   an   item   tO a   Completely serviceable/operational   condition   as   required   by   maintenance   standards   in   appropriate   technical publications   (i.e,   DMWR).   Overhaul   is   normally   the   highest   degree   of   maintenance   performed   by   the Army.   Overhaul   does   not   normally   return   an   item   to   like-new   condition. k.   Rebuild.   Consists   of   those   services/actions   necessary   for   the   restoration   of   unserviceable equipment   to   a   like-new   condition   in   accordance   with   original   manufacturing   standards.   Rebuild   is   the highest   degree   of   materiel   maintenance   applied   to   Army   equipment.   The   rebuild   operation   includes   the act   of   returning   to   zero   those   age   measurements   (hours/miles,   etc.)   considered   in   classifying   Army equipment/components. B-3. Explanation   Of   Columns   In   The   MAC,   Section   IL a. Column  1.  Group Number.  Column  1  lists  functional  group  code  numbers,  the  purpose  of  which  is to   identify   maintenance   significant   components,   assemblies,   subassemblies,   and   modules   with   the   next higher   assembly.   End   item   group   number   shall   be   “00.” b. Column  2.  Component/Asse mbly.  Column  2  contains  the  names  of  components,  assemblies, subassemblies,  and  modules  for  which  maintenance  is  authorized. c. Column  3.  Maintenance  Function.  Column  3  lists  the  functions  to  be  performed  on  the  item  listed in   column   2.   (For   a   detailed   explanation   of   these   functions,   see   paragraph   B–2.) d. Column   4.   Maintenance   Categorv -.  Column  4  specifies,  by  the  listing  of  a  work  time  figure  in  the appropriate   subcolumn(s),   the   category   of   maintenance   authorized   to   perform   the   function   listed   in column   3.   This   figure   represents   the   active   time   required   to   perform   that   maintenance   function   at   the indicated  category  of  maintenance.  If  the  number  or  complexity  of  the  tasks  within  the  listed  maintenance function   vary   at   different   maintenance   categories,   appropriate   work   time   figures   will   be   shown   for   each category.   The   work   time   figure   represents   the   average   time   required   to   restore   an   item   (assembly, subassembly,   component,   module,   end   item,   or   system)   to   a   serviceable   condition   under   typical   field operating   conditions.   This   time   includes   preparation   time   (including   any   necessary   disassembly/ assembly   time),   troubleshooting/fault   location   time,   and   quality   assurance/quality   control   time   in   addition to  the  time  required  to  perform  the  specific  tasks  identified  for  the  maintenance  functions  authorized  in  the maintenance   allocation   chart.   The   symbol   designations   for   the   various   maintenance   categories   are   as follows: 1 Services   –   inspect,   test,   service,   adjust,   align,   calibrate,   and/or   replace. 2 Fault Iocate/troubleshoot – the process of investigating and detecting the cause of equipment malfunctioning; the act of isolating a fault within a system or unit under test (UUT). 3 Disassemble/assemble-  encompasses  the  step-by-step  taking  apart  (or  breakdown)  of  a  spare/functional  group coded item to the Ievel of its least componency identified as maintenance significant (i. e., assigned an SMR code) for the category of maintenance under consideration. 4 Actions_ welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing. B -2

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