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 TM 55-1905-220-14-7
(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 equipment 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,
'm 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.
(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 equip-
ments/components.
B-2
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