B.2.7 Remove/Install.To remove and install the same item when required to performservice or other maintenance functions.Install may be the act of emplacing,seating, or fixing into position a spare, repair part, or module (component orassembly) in a manner to allow the proper functioning of an equipment or system.B.2.8 Replace.To remove an unserviceable item and install a serviceable counterparti n i t s p l a c e ."Replace" is authorized by the MAC and assigned maintenance level isshown as the 3d position code of the SMR code.B.2.9 Repair.The application of maintenance services1, including faultl o c a t i o n / t r o u b l e s h o o t i ng2, removal/installation, and disassembly/assembly3procedures, and maintenance actions4 to identify troubles and restoreserviceability to an item by correcting specific damage, fault, malfunction, orfailure in a part, subassembly, module (component or assembly) , end item, or system.B.2.1O Overhaul.That maintenance effort (service/action) prescribed to restore anitem to a completely serviceable/operational condition as required by maintenancestandards in appropriate technical publication (i.e., DMWR) .Overhaul is normallythe highest degree of maintenance performed by the Army.Overhaul does not normallyreturn an item to like new condition.B.2.11 Rebuild.Consists of those services/actions necessary for the restoration ofunserviceable equipment to a like new condition in accordance with originalmanufacturing standards.Rebuild is the highest degree of materiel maintenanceapplied to Army equipment.The rebuild operation includes the act of returning tozero those age measurement (e.g., hour/miles) considered in classifying Armyequipment/components.B.3 EXPLANATIONOFCOLWNSINTNEMAC,SECTIONII.B.3.1 Column 1, Group Number.Column 1 lists functional group code numbers, the purposeof which is to identify maintenance significant components, assemblies,subassemblies,and modules with the next higher assembly.B.3.2 Column 2. Component/Assembly.Column 2 contains the item names of components,assemblies,subassemblies, and modules for which maintenance is authorized.B.3.3 Column 3, Maintenance Function.Column 3 lists the functions to be performed onthe item listed in Column 2. (For detailed explanation of these functions, seeparagraph B.2.) B.3.4 Column 4, Maintenance Level.Column 4 specifies each level of maintenanceauthorized to perform each function listed in Column 3, by indicating work-timerequired (expressed as man-hours in whole hours or decimals) in the appropriatesubcolumn .This work-time figure represents the active time required to performthat maintenance function at the indicated level of maintenance.If the number orcomplexity of the tasks within the listed maintenance function vary at differentmaintenance levels, appropriate work-time figures are to be shown for each level.The work-time figure represents the average time required to restore an item(assembly, subassembly, component, module, end item, or system) to a serviceablecondition under typical field operating conditions.This time includes preparationtime (including any necessary disassembly/assembly time),troubleshooting/faultlocation time, and quality assurance time in addition to the time required toperform the specific tasks identified for the maintenance functions authorized in1Services - inspect, test, service, adjust, align, calibrate, and/or replace.2Fault location/trouble shooting - The process of investigating and detecting the cause ofequipment malfunctioning; the act of isolating a fault within a system or unit under test (UUT).3Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional groupcoded item to the level of its least component that is assigned an SMR code for the level ofmaintenance under consideration (i.e., identified as maintenance significant).4Actions - welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.B-2TM 10-4320-344-24
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