TM 9-2330-371-14&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.
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i. Repair. The application of maintenance services , including fault Iocation/troubleshooting,
removal/installation, and disassembly/assembly procedures, and maintenance actions 2 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.
j. Overhaul. That maintenance effort (service or action) prescribed to restore an item to
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 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, Components/Assembly. Column 2 contains the name 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 B-2).
d. Column 4, Maintenance Category. Column 4 specifies, by the listing of a worktime figure in the
appropriate subcolumn(s), the category of maintenance authorized to perform the function listed in
column 3. This figure represents the active time required to perform that maintenance function at the
indicated category of maintenance. If the number or complexity of the tasks within the listed
maintenance function vary at different maintenance categories, appropriate worktime figures will be
shown for each category. The worktime figure represents the average time required to restore an item
`Services inspect, test, service, adjust, aline, calibrate, and/or replace.
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Actions welding, grinding, riveting, straightening, facing, remachinery, and/or
resurfacing.
B-2
