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B-3. MAINTENANCE FUNCTIONS.
a. lnspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electncal char-
acteristics 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 certi-
fied standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared.
g. Remove/Install. To remove and install the same item when required to perform service or other maintenance func-
tions. Install may be the act of replacing, seating, or fixing into position a spare, repair part, or module (component or assem-
bly) 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 autho-
rized by the MAC and is shown as the 3d position code of the SMR code.
i. Repair. The application of maintenance services1, including fault location, trouble shooting2, removal/installa-
tion, 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 apart, subassembly, module (component or assem-
bly), end item, or system.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/op-
erational 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 alike 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.
1 Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
2 Fault locate/troubleshoot - 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).
3 Disassemble/assemble – encompasses the step-by-step taking apart (or breakdown) of a spare/
functional group coded item to the level of its least componency identified as maintenance signifi-
cant (i.e., assigned an SMR code) for the category of maintenance under consideration.
4 Actions - welding, grinding, riveting, straightening, facing, remachining and/or resurfacing.
B-3
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