TM 5-4310-373-14
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. GENERAL.
f. Calibrate. To determine and cause corrections to
be made or to be adjusted on instruments or test
measuring and diagnostic equipments used in pre-
a. This section provides a general explanation of all
maintenance and repair functions authorized at
cision measurement. Consists of comparisons of
various maintenance levels.
two instruments, one of which is a certified stan-
dard of known accuracy, to detect and adjust any
b. The Maintenance Allocation Chart (MAC) in Sec-
discrepancy in the accuracy of the instrument
tion II designates overall responsibility for the
being compared.
performance of maintenance functions on the
identified end item or component. The imple-
g. Install. The act of emplacing, seating, or fixing
mentation of the maintenance functions upon the
into position an item, part, or module (component
end item or component will be consistent with the
or assembly) in a manner to allow the proper func-
assigned maintenance functions.
tioning of an equipment or system.
c. Section III lists the special tools and test equip-
ment required for each maintenance function as
h. Replace. The act of substituting a serviceable like
referenced from Section II.
type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
d. Section IV contains supplemental instructions on
explanatory notes for a particular maintenance
i. Repair. The application of maintenance services
function.
(inspect, test, service, adjust, align, calibrate or
replace) or other maintenance actions (welding,
B-2. MAINTENANCE FUNCTIONS.
grinding, riveting, straightening, facing, remachin-
ing or resurfacing) to restore serviceability to an
a. Inspect. To determine the serviceability of an
item by correcting specific damage, fault, mal-
item by comparing its physical, mechanical and/or
function, or failure in a part, subassembly, module
electrical characteristics with established standards
(component or assembly), end item, or system.
through examination.
b. Test. To verify serviceability and detect incipient
j. Overhaul. That maintenance effort (services/
failure by measuring the mechanical or electrical
actions) necessary to restore an item to a com-
characteristics of an item and comparing those
pletely serviceable/operational condition as pre-
characteristics with prescribed standards.
scribed by maintenance standards (i.e., DMWR)
in appropriate technical publications. Overhaul
c. Service. Operations required periodically to keep
is normalIy the highest degree of maintenance per-
an item in proper operating condition, i.e., to
formed by the Army. Overhaul does not normally
clean (decontaminate), to preserve, to drain, to
return an item to like new condition.
paint, or to replenish fuel, lubricants, hydraulic
fluids, or compressed air supplies.
k. Rebuilt. Consists of those services/actions neces-
d. Adjust. To maintain, within prescribed limits, by
sary for the restoration of unserviceable equip-
bringing into proper or exact position, or by
ment to a like new condition in accordance with
setting the operating characteristics to specified
original manufacturing standards. Rebuild is the
parameters.
highest degree of material maintenance applied to
Army equipment The rebuild operation includes
e. Align. To adjust specified variable elements of an
the act of returning to zero those age measure-
item to bring about optimum or desired perform-
ments (hours/miles, etc.) considered in classifying
ance.
Army equipments/components.
