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TM 5-4320-273-14
M A I N T E N A N C E ALLOCATION CHART
Section I. INTRODUCTION
B-1. General.
to be made or to be adjusted on instruments or test
a. This section provides a general explanation of
measuring and diagnostic equipments used in
all maintenance and repair functions authorized at
precision measurement, Consists of comparison of
various maintenance levels.
two instruments, one of which is a certified standard
b. Section II designates overall responsibility for
of known accuracy, to detect and adjust any
the performance of maintenance functions on the
discrepancy in the accuracy of the instrument being
identified end item or component and the work
compared.
measurement time required to perform the functions
(7) Install. The act of emplacing, seating, or
by the designated maintenance level, The im-
fixing into position an item, part or module (com-
plementation of the maintenance functions upon the
ponent or assembly) in a manner to allow the proper
end item or component will be consistent with the
functioning of an equipment or system.
assigned maintenance functions.
(8) Replace. The act of substituting a serviceable
c. Section III lists the tools and test equipment
like type part, subassembly, or module (component or
required for each maintenance function as referenc-
assembly) for an unserviceable counterpart.
ed from section II.
(9) Repair. The application of maintenance ser-
vices (inspect, test, service, adjust, align, calibrate, or
B-2. Explanation of Columns in Section Il.
replace) or other maintenance actions (welding,
a. Column (1) Group Number. Column 1 lists
g r i n d i n g , riveting, straightening, facing;
group numbers to identify related components,
remachining, or resurfacing) to restore serviceability
assemblies, subassemblies, and modules with their
to an item by correcting specific damage, fault,
next higher assembly. The applicable groups are list -
malfunction, or failure in a part, subassembly,
ed in the MAC in disassembly sequence beginning
module (component or assembly), end item, or system.
with the first group removed.
(10) Overhaul. That maintenance effort (ser-
b. Column (2) Component/Assembly. This column
vice/action) necessary to restore an item to a com-
contains the noun names of components, assemblies,
pletely serviceable/operational condition as
subassemblies and modules for which maintenance is
prescribed by maintenance standards (i.e., DMWR) in
authorized.
appropriate technical publications, Overhaul is nor-
c. Column (3) Maintenance Functions. This
mally the highest degree of maintenance performed
column lists the functions to be performed on the
by the Army. Overhaul does not normally return an
item listed in column 2. The maintenance functions
item to a like new condition,
are defined as follows
(11) Rebuild. Consists of those services/actions
(1) Inspect. To determine serviceability of an
necessary for the restoration of unserviceable equip-
item by comparing its physical, mechanical, and/or
ment to a like new condition in accordance with
electrical characteristic with established standards
original manufacturing standards. Rebuild is the
through examination,
highest degree of materiel maintenance applied to
(2) Test. To verify serviceability and detect in-
Army equipment. The rebuild operation includes the
cipient failure by measuring the mechanical or elec-
act of returning to zero those age measurement
trical characteristic of an item and comparing those
(hours, miles, etc.) considered in classifying Army
characteristic with prescribed standards,
equipment/components,
(8) Service. Operations required periodically to
d. Column (4) Maintenance Category. This column
keep an item in proper operating condition, i.e., to
is made up of subcolumns for each category of main-
clean (decontaminated), to preserve, to drain, to
tenance. Work time figures are listed in these sub-
paint, or to replenish fuel, lubricants, hydraulic
columns for the lowest level of maintenance
fluids, or compressed air supplies.
authorized to perform the function listed in column 8,
(4) Adjust. To maintain within prescribed limits,
These figures indicate the average active time
by bringing into proper or exact position, or by set-
required to perform the maintenance function at the
ting the operating characteristics to specified
indicated category of maintenance under typical
parameters,
field operating conditions,
(5) Align. To adjust specified variable elements
of an item to bring about optimum or desired per-
e, Column (5) Tools and Equipment. This column
formance.
is provided for referencing by code, the common tool
(6) Calibrate. To determine and cause corrections
sets (not individual tools), special tools, test and sup-

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