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APPENDIX D - MAINTENANCE ALLOCATION CHART
GENERAL SUPPORT MAINTENANCE

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TM 5-3895-368-14&P d. Adjust. To maintain or regulate, within prescribed    limits,    by    bringing    into    proper    or    exact position,   or   by   setting   the   operating   characteristics   to specified parameters. e. Align.    To  adjust  specified  variable  elements  of an item to bring about optimum and desired performance. f. Calibrate.  To determine and cause correction to be   made   or   to   be   adjusted   on   instruments   or   test, measuring,  and diagnostic equipments used in precision measurement. Consists of comparisons of two instruments,   one   of   which   is   a   certified   standard   of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared. g. Remove/Install.  To remove and install the same item     when     required     to     perform     service     or     other maintenance    function.        Install    may    be    the    act    of emplacing, seating, or fixing into position a spare, repair part, or module (component or assembly) in a manner to allow the proper functioning of an equipment or system. h. Replace.  To remove an unserviceable item and install a serviceable counterpart in its place.  "Replace" is authorized by the MAC and is shown as the 3rd position code on the SMR code. i. Repair. The application of maintenance services, including fault location/troubleshooting, removal/installation, and disassembly/assembly procedures and maintenance actions 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 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   material   maintenance   applied   to   Army   equipment. The rebuild operation includes the act of returning to zero those age measurements (hour/miles, etc., considered in classifying Army equipment/components. D-6. THE ARMY MAINTENANCE SYSTEMS (TAMS). a. The  Army  maintenance  system  consist  of  four levels.    They  are  unit,  direct  support,  general  support, and depot levels of maintenance. b. The Maintenance Allocation Chart (MAC) will be the  primary  tool  for  assigning  tasks  within  the  levels  of the Army Maintenance System. D-6.1. UNIT LEVEL MAINTENANCE. a. Unit   maintenance   tasks   are   performed   by   the operator,    crew,    and/or    unit    maintenance    personnel. Equipment  operators  and  unit  mechanics  use  PMCS  to detect and correct faults. b. Maintenance   operations   assigned   to   the   unit level normally include the following:   (1) Performance of PMCS. (2) Inspection  by  sight  and  touch  of  external and other easily accessible components. (3) Lubrication, cleaning, preserving (to include    spot    painting),    tightening,    replacement,    and minor adjustments. (4) Replacement of easily accessible unserviceable parts and assemblies usually not requiring special tools or test equipment. (5) Replacement of modules as authorized by the Maintenance Allocation Chart. c. Unserviceable   reparables   (properly   preserved, protected,    and    tagged)    that    are    beyond    authorized capability or capacity to repair will be evacuated through the   appropriate   supply   support   activities   for   repair   or exchange. d. Performance  of  unit  level  maintenance  will  be documented using the forms and records  defined  in  DA PAM  738-750  and  DA  PAM  738-751.    This  information will assist commanders in evaluating and monitoring their maintenance program. e. Material condition status readiness reporting will be per AR 700-138. D-6.2. DIRECT SUPPORT MAINTENANCE. a. Direct support is characterized by: (1) One stop service to supported units. (2) Highly   mobile,   weapon   system   oriented maintenance. b. Direct Support Maintenance Divisional Maintenance  units  will  support  organic  elements  of  the division.      Attached   units   will   require   coordination   with parent unit for support.  Non-divisional maintenance units will   provide   support   on   an   area   basis   and   back-up support to divisional support units. D-3







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