TM 5-2330-325 14&P
MAINTENANCE FUNCTIONS (Continued).
Replace. To remove an unserviceable item and install a serviceable counterpart in its place.
"Replace" is authorized by the MAC and assigned maintenance level is shown as the 3rd position
code of the SMR code.
Repair. The application of maintenance services1 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), end item, or system.
Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely
serviceable/operational condition as required by maintenance standards in the 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.
of those services/actions necessary for the restoration
equipment to a like new condition in accordance with original manufacturing standards. Rebuild is
the highest degree of materiel maintenance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements (e.g., hours/miles) considered in
classifying Army equipment/components.
EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
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.
Column (2) - Component/Assembly. Column 2 contains the item names of components,
assemblies, subassemblies, and modules for which maintenance is authorized.
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 B-2).
When a complete replace or repair task performed at higher level maintenance
includes lower level maintenance tasks (equipment condition/follow-on
tasks), the lower level work time figures in the MAC must be added to the
higher level work time shown in the MAC to determine the total to accomplish
that maintenance function.
Services - Inspect, test, service, adjust, align, calibrate, and/or replace.
Fault location/troubleshooting - 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).
Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/function group coded item to the level of its least
component, that is assigned an SMR code for the level of maintenance under consideration (i.e., identified as maintenance
Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.