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TM 10-5430-1232-12&P
g. Remove/Install. To remove and install the same item when required to perform service or other
maintenance functions. 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 of the SMR code.
i. Repair. The application of maintenance services' including fault location/troubleshooting2,
removal/installation, and disassembly/assembly3 procedures, and maintenance actions4 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), and 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 in 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 (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 numbers, the purpose of which is to
identify maintenance significant components, assemblies, subassemblies, and modules with the next higher
assembly.
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 detailed explanation of these functions, see paragraph NO TAG-2.)
1Service - Inspect, test, service, adjust, aline, calibrate, and/or replace
2Fauit location/troubleshooting - The process of investigating and detecting the cause of equipment
malfunctioning; the act of isolating a fault within a system or unit undertest (UUT).
3Disassembly/assembly - The step-by-step breakdown (taking apart) of a saare/functional group coded
item to the level of its least component, that is assigned as SMR code for the level of maintenance under
consideration (ile/, identification as maintenance significant).
4Actions-Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.
B-2
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