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APPENDIX B MAINTENANCE ALLOCATION CHART Section I.  INTRODUCTION
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TM-5-4210-229-14P Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III - TM-5-4210-229-14P_501
TM5-4210-229-14&P B-2. MAINTENANCE FUNCTIONS (Continued). h. Replace.    To  remove  an  unserviceable  item  and  install  a  serviceable  counterpart  in  its  place.    "Replace"  is authorized by the MAC. i. Repair.  The application of maintenance services 1, including fault location/ troubleshooting2, removal/installation, and   disassembly/assembly   3,   procedures,   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.        The    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 to 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   material 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 II. a. Column  1,  Group  Number.    Column  1  lists  functional  group  code  number,  the  purpose  of  which  is  to  identify maintenance  significant  components,  assemblies,  subassemblies,  and  modules  with  the  next  higher  assembly. End item group numbers shall be "001". b. Column 2, Component/Assembly.  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  Category.    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   tasks   within   a   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 locate/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 for the category of maintenance under consideration. 4 Actions - welding, grinding, riveting, straightening, facing remachinery, and/or resurfacing. B-2

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