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TM 5-4320-308-13
B-3. MAINTENANCE FUNCTIONS
Maintenance functions will be limited to and defined as follows:
a.
Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and or electrical
characteristics with established standards through examination (e. g. , by sight, sound, or feel)
b.
Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics
of an item and comparing those characteristics with prescribed standards
c.
Service. Operations required periodically to keep an item in proper operating condition, i. e. , to clean
(includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants,
chemical fluids, or gases
d.
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting
the operating characteristics to specified parameters
e.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance
f.
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test, measuring,
and diagnostic equipments used in precision measurement. Consists of comparisons of two instruments, one
of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the
instrument being compared
g.
Remove/lnstall. 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 3d 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) necessary to restore an item to a completely
serviceable/operational condition as prescribed 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 a 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-4. EXPLANATION OF COLUMNS IN THE MAC, SECTION II
a.
Group Number (Column 1). Column 1 lists functional group code numbers which are assigned to identify
maintenance significant components, assemblies, subassemblies, and modules to their next higher assembly
B-2
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