TM5-6675-296-14
MAINTENANCE
ALLOCATION
CHART
Section I. INTRODUCTION
g. Install. The act of emplacing, seating, or
fixing into position an item, part, or module
a. This section provides a general explanation of
(component or assembly) in a manner to allow the
all maintenance and repair functions authorized at
proper functioning of an equipment or system.
various maintenance levels.
h. Replace. The act of substituting a serviceable
b. The Maintenance Allocation Chart (MAC) in
like type part, subassembly, or module (component
Section II designates overall responsibility for the
or assembly) for an unserviceable counterpart.
performance of maintenance functions on the
i. Repair. T h e
a p p l i c a t i o n o f maintenance
identified end item or component. The im-
services or other maintenance actions to restore
plementation of the maintenance functions upon the
serviceability to an item by correcting specific
end item or component will be consistent with the
damage, fault, malfunction, or failure in a part,
assigned maintenance functions.
subassembly, module (component or assembly),
c. Section III lists the special tools and test
and item, or system.
equipment required for each maintenance function
as referenced from section II.
j. Overhaul. That maintenance effort (ser-
d. Section IV contains supplemental instructions
vices/actions) necessary to restore an item to a
on explanatory notes for a particular maintenance
completely serviceable/operational condition as
function.
prescribed by maintenance standards (i.e., DM-
WR.) in appropriate technical publications.
D-2. Maintenance Functions
O v e r h a u l is normally the highest degree of
a. Inspect. To determine the serviceability of an
maintenance performed by the Army. Overhaul
item by comparing its physical, mechanical and/or
does not normally return an item to like new
electrical characteristics with established standards
condition.
through examination.
h. Refold. Consists of those services/actions
b. Test. T O verify serviceability and detect
necessary for the restoration of unserviceable
incipient failure by measuring the mechanical or
equipment to a like new condition in accordance
electrical characteristics of an item and comparing
with original manufacturing standards. Rebuild is
those characteristics with prescribed standards.
the highest degree of materiel maintenance applied
c. Service. Operations required periodically to
to Army equipment. The rebuild operation includes
keep an item in proper operating condition, i.e., to
the act of returning to zero those age
clean (decontaminate), to preserve, to drain, to
measurement (hours/miles, etc.) considered in
paint, or to replenish fuel, lubricants, hydraulic
classifying Army equipment /components.
fluids, or compressed air supplies.
D-3. Column Entries Used in the MAC
d. Adjust. To maintain, within prescribed
Iimits, by bringing into proper or exact poeition, or
a. Column (1), G rOUP Number. Column (1) lists
by setting the operating characteristicsi to specified
group numbers, the purpose of which is to identify
parameters.
subassemblies, and
assemblies,
components,
e. Align. To adjust specified variable elements
modules with the next higher assembly.
of an item to bring about optimum or desired
b. Column (2), Component/Assembly. Column
performance.
(2) contains the names of component, assemblies,
f. Calibrate. To determine and cause corrections
subassemblies, and modules for which maintenance
to be made or to be adjusted on instruments or
is authorized.
test measuring and diagnostic equipments used in
c. Column (3), Maintenance Functions. Column
precision measurement.. Consists of comparisons of
(3) lists the functions to be performed on the item
o n e of which is a certified
listed in column (2). (For detailed explanation of
accuracy, to detect and adjust
these functions, see pare D-2.)
the accuracy of the instrument
d. Column (4), Maintenance Level. Column (4)
specifies, by the listing of a work time figure in the
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