TM 5-5430-212-13&P
(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 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. 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 being compared.
(7)
Install. The act of emplacing seating, or fixing into position an item, part of 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, sub-assembly, or module (component or
assembly) for an unserviceable counterpart.
(9)
Repair. The application of maintenance services (inspect, test, service, adjust, 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,
sub-assembly, 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 (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.
(11) 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 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
equipment/components.
d.
Column (4), Maintenance Category. This column is made up of sub-columns for each category of
maintenance. Work time figures are listed in these sub-columns for the lowest level of maintenance
authorized to perform the function listed in Column (3). These figures indicate the average active time
required to perform the maintenance function at the indicated category of maintenance under typical field
operating conditions:
B-2
