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TM 9-2320-364-20-5
B-2
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/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.
(1).
Service includes inspection, testing, service, adjustment, alinement, calibration and/or replacement.
(2).
Fault locate/troubleshooting is 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 level of its least componency identified as maintenance significant (i.e., assigned
an SMR code) for the category of maintenance under consideration.
(4).
Actions include welding, grinding, riveting, straightening, facing, remachining and/or resurfacing.
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 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 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. End item group number shall be “OO.”
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.
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