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TM 10-6630-247-13&P
B-2. MAINTENANCE FUNCTIONS - cont
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/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.
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 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 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 numbers are “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. (For a detailed explanation of these functions, see paragraph B-2).
d.
Column 4, Maintenance Level. Column 4 specifies, by the listing of a work time figure
(expressed as man-hours shown as whole hours or decimals) in the appropriate subcolumn(s), the
level 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 level
of maintenance, If the number or the complexity oft he tasks within the listed maintenance
function vary at different maintenance levels, appropriate work time figures will be shown for
each level. The work time figure represents the average time required to restore an item
(assembly, subassembly, component, module, end item, or system) to a serviceable condition
under typical field operating conditions, This time includes preparation item including any
necessary disassembly/assembly time), troubleshooting/fault location time, and quality
B-2
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