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TM 5-4120-361-14
APPENDIX D
MAINTENANCE ALLOCATION CHART
Section I.
D-1.
General.
a.
This section provides a general
explanation of all maintenance and re-
pair functions authorized at various
maintenance levels.
b. The Maintenance Allocation Chart
(MAC) in Section II designates overall
responsibility for the performance of
maintenance functions on the identified
end item or component.
The implemen-
tation of the maintenance functions upon
the end item or component will be con-
sistent with the assigned maintenance
functions.
c.
Section III lists the special
tools and test equipment required for
each maintenance function as referenced
from Section II.
d.
Section IV contains supplemental
instructions on explanatory notes for a
particular maintenance function.
D-2 .
Maintenance Functions.
a. Inspect.
To determine the ser-
viceability of an item by comparing its
physical, mechanical and/or electrical
characteristics with established stan-
dards through examination.
b. Test.
To verify serviceability
and detect incipient failure by measur-
ing the mechanical or electrical char-
acteristics of an item and comparing
those characteristics with prescribed
standards.
c. Service. Operations required per-
iodically to keep an item in proper
operating condition, i.e., to clean (de-
contaminate), to preserve, to drain, to
paint, or to replenish fuel, lubricants,
hydraulic fluids, or compressed air
supplies.
d. Adjust. To maintain, within pre-
scribed limits, by bringing into proper
or exact position, or by setting the op-
erating characteristics to specified
parameters.
Introduction
e. Align.
To adjust specified vari-
able elements of an item to bring about
optimum or desired performance.
f. Calibrate.
To determine and cause
corrections to be made or to be adjusted
on instruments or test measuring and di-
agnostic equipments used in precision
measurement.
Consists of comparisons of
two instruments, one of which is a cer-
tified standard of known accuracy, to
detect and adjust any discrepancy in the
accuracy of the instrument being com-
pared.
g. Install. The act of emplacing,
seating, or fixing into position an
item, part, or module (component or as-
sembly) in a manner to allow the proper
functioning of an equipment or system.
h. Replace. The act of substituting
a serviceable like type part, subassem-
bly, or module (component or assembly)
for an unserviceable counterpart.
i. Repair.
The application of main-
tenance services (inspect, test, ser-
vice, adjust, align, calibrate, or re-
place) or other maintenance actions
(welding, grinding, riveting, straight-
eing, facing, remachining, or resurfac-
ing) to restore serviceability to an
item by correcting specific damage,
fault, malfunction, or failure in a
part, subassembly, module (component or
assembly), and item, or system.
j. Overhaul.
That maintenance effort
(services actions) necessary to restore
an item to a completely serviceable/op-
erational condition as prescribed by
maintenance standards (i.e., DMWR) in ap-
propriate technical publications. Over-
haul is normally the highest degree of
maintenance performed by the Army.
Overhaul does not normally return an
item to like new condition.
k. Rebuild.
Consists of those ser-
vices/actions necessary for the restora-
tion of unserviceable equipment to a
like new condition in accordance with
original manufacturing standards. Re-
build is the highest degree of materiel
D-1
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