TM 5-4310-275-14
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
Adjust. To maintain within prescribed
B-1. General
(4)
limits, by bringing into proper or exact position,
a. This section provides a general explanation
or by setting the operating characteristics to
of all maintenance and repair functions authorized
specified parameters.
at various maintenance levels.
(5) Align. To adjust specified variable
b. Section II designates overall responsibility
elements of an item to bring about optimum or
for the performance of maintenance functions on
desired performance.
the identified end item or component and the
(6) Calibrate. To determine and cause
work measurement time required to perform the
corrections to be made or to be adjusted on in-
functions by the designated maintenance level.
struments or test measuring and diagnostic
The implementation of the maintenance functions
equipments used in precision measurement.
upon the end item or component will be consistent
Consists of comparison of two instruments, one of
with the assigned maintenance functions.
which is a certified standard of known accuracy,
c. Section III lists the tools and test equip-
to detect and adjust any discrepancy in the ac-
ment required for each maintenance function as
curacy of the instrument being compared.
referenced from Section II.
(7) Install. The act of emplacing, seating, or
B-2. Explanation of Columns in Section II
fixing into position an item, part or module
a. Column 1. Group Number. Column 1 lists
(component or assembly) in a manner to allow the
group numbers to identify related components,
proper functioning of an equipment or system.
assemblies, sub-assemblies, and modules with
(8) Replace. The act of substituting a
their next higher assembly. The applicable groups
serviceable like type part, sub-assembly, or
are listed in the MAC in disassembly sequence
module (component or assembly) for an un-
beginning with the first group removed.
serviceable counterpart.
b. Column 2. Component/Assembly. This
(9) Repair. The application of maintenance
column contains the noun names of components,
services (inspect, test, service, adjust, align,
assemblies, sub-assemblies and modules for
calibrate, or replace) or other maintenance actions
which maintenance is authorized.
(welding, grinding, riveting, straightening,
c. Column 3. Maintenance Functions. This
facing, remachining or resurfacing) to restore
column lists the functions to be performed on the
serviceability to an item by correcting specific
item listed in Column 2. The maintenance func-
damage, fault, malfunction, or failure in a part,
tions are defined as follows:
sub-assembly, module (component or assembly),
(1) Inspect. To determine serviceability of
end item, or system.
an item by comparing its physical, mechanical,
(10) Overhaul. That maintenance effort
and / or electrical characteristics with established
(service/action) necessary to restore an item to a
standards through examination.
completely serviceable/operational condition as
(2) Test. To verify serviceability and detect
prescribed by maintenance standards (i.e.,
incipient failure by measuring the mechanical or
DMWR) in appropriate technical publications.
electrical characteristics of an item and com-
Overhaul is normally the highest degree of
paring those characteristics with prescribed
maintenance performed by the Army. Overhaul
standards.
does not normally return an item to a like new
(3) Service. Operations required periodically
condition.
to keep an item in proper operating condition,
(11) Rebuild. C o n s i s t s of those ser-
i.e., to clean (decontaminated), to preserve, to
vices /actions necessary for the restoration of
drain, to paint, or to replenish fuel, lubricants,
unserviceable equipment to a like new condition
hydraulic fluids, or compressed air supplies.
in accordance with original manufacturing
