B-2. EXPLANATION OF COLUMNS IN SECTION II . - Continued
(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
(4) Adjust. To maintain within prescribed limits, by bringing 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
(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. Consists 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
(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, service, adjust, align, calibrate, or
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.
Overhaul. That maintenance effort (service/action) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards (i.e., DMWR) in appropriate technical
publications. Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not
normally return an item to a like new condition.
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 equipments/components.