B.2.7 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.
B.2.8 Replace.
To remove an unserviceable item and install a serviceable counterpart
i n i t s p l a c e .
"Replace" is authorized by the MAC and assigned maintenance level is
shown as the 3d position code of the SMR code.
B.2.9 Repair.
The application of maintenance services1, including fault
l o c a t i o n / t r o u b l e s h o o t i ng2, 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.
B.2.1O 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 publication (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.
B.2.11 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 measurement (e.g., hour/miles) considered in classifying Army
equipment/components.
B.3 EXPLANATION OF COLWNS IN TNE MAC, SECTION II.
B.3.1 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.
B.3.2 Column 2. Component/Assembly.
Column 2 contains the item names of components,
assemblies,
subassemblies, and modules for which maintenance is authorized.
B.3.3 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.)
B.3.4 Column 4, Maintenance Level.
Column 4 specifies each level of maintenance
authorized to perform each function listed in Column 3, by indicating work-time
required (expressed as man-hours in whole hours or decimals) in the appropriate
subcolumn .
This work-time figure represents the active time required to perform
that maintenance function at the indicated level of maintenance.
If the number or
complexity of the tasks within the listed maintenance function vary at different
maintenance levels, appropriate work-time figures are to 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
time (including any necessary disassembly/assembly time),
troubleshooting/fault
location time, and quality assurance time in addition to the time required to
perform the specific tasks identified for the maintenance functions authorized in
1Services - inspect, test, service, adjust, align, calibrate, and/or replace.
2Fault location/trouble shooting - 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).
3Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional 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 significant).
4Actions - welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.
B-2
TM 10-4320-344-24
