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 TM 55-1905-219-14-7
(3) Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean
(decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or compressed air
supplies.
(4) Adjust. To maintain within prescribed limits, by grinding into proper or exact position, or by setting the
operating characteristics to specified parameters.
(5) Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
(6) 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. Consist of comparison 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.
(7) Install. The act of emplacing, seating, or fixing into position an item, part, or module (component or
assembly) in a manner to allow the proper functioning of an equipment or system.
(8) Replace. The act of substituting a serviceable "like type" part, subassembly or module (component or
assembly) for an unserviceable counterpart.
(9) Repair. The application of maintenance services (inspect, test, servic , adjust, align, calibrate, or
e
replace) or other maintenance actions (welding, grinding, riveting, straightening, facing remachining or resurfacing) to
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.
(10) 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 manuals. Overhaul is
normally the highest degree of maintenance performed by the Army. Overhaul does not normally return an item to a like-
new condition.
(11) Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a
like-new condition in accordance with organizational 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 equipments/components.
B-2
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