TM 9-2330-287-14&P
B-2. MAINTENANCE FUNCTIONS - CONTINUED.
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 a
piece of 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 shown as the third position code of the SMR code.
i. Repair. The application of maintenance services', including fault location/troubleshooting2,
removal/installation, disassembly/assembly3 procedures, and maintenance actions4 to identify
trouble 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 a com-
pletely serviceable/operational condition as required by maintenance standards in appropriate
technical publications (ie, 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 materiel 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 Il.
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 00.
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. (See paragraph B-2 for a detailed explanation of these functions.)
1
Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
2
Fault location/troubleshooting - The process of investigating and detecting the cause of equip-
ment malfunctioning; the act of isolating a fault within a system or Unit Under Test (UUT).
Disassembly/assembly encompasses the step-by-step taking apart (or breakdown) of a
spare/functional group code item to the level of its least componency identified as maintenance
significant (ie, assigned an SMR code) for the category of maintenance under consideration.
4
Actions Welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing.
B-2