The application of maintenance services or other
maintenance actions2 to restore serviceability to an item by correcting
B-3. MAINTENANCE FUNCTIONS (cont)
specific damage, fault, malfunction, or failure in a part, subassembly,
module (component or assembly), end item, or system.
b. Test. To verify serviceability by measuring the mechanical or
electrical characteristics of an item and comparing those characteristics with
j. 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 publications
c. Service. Operations required periodically to keep an item in proper
(i.e., DMWR). Overhaul is normally the highest degree of maintenance
operating condition, i.e., to clean (includes decontaminate, when required),
performed by the Army. Overhaul does not normally return an item to like
to pre-serve, to drain, to paint, or to replenish fuel, lubricants, chemical
fluids, or gases.
k. Rebuild. Consists of those services/actions necessary for the
d. Adjust. To maintain, within prescribed limits, by bringing into proper
restoration of unserviceable equipment to a like new condition in accordance
or exact position, or by set-ting the operating characteristics to specified
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,
e. Aline. To adjust specified variable elements of an item to bring
etc.) considered in classifying Army equipments/components.
about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be
B-4. STANDARD GROUPS (COLUMNS 1 AND 2)
adjusted on instruments or test, measuring, and diagnostic equipment used
in precision measurement. Consists of comparisons of two instruments, one
a. Column 1, Group Number. Column 1 lists functional group code
of which is a certified standard of known accuracy, to detect and adjust any
numbers, the purpose of which is to identify components, assemblies,
discrepancy in the accuracy of the instrument being compared.
subassemblies, and modules with the next higher assembly.
g. 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.
1 Services--inspect, test, service, adjust, aline, calibrate, or replace.
h. Replace. The act of substituting a serviceable like type part,
2 Actions--welding, grinding, riveting, straightening, facing, remachining, or
subassembly, or module (component or assembly) for an unserviceable