TM 5-4310-277-14
M A I N T E N A N C E ALLOCATION CHART
Section I. INTRODUCTION
(4) Adjust. To maintain within prescribed
B-1. General
limits, by bringing into proper or exact position, or
a. This section provides a general explanation of
by setting the operating characteristics to specified
all maintenance and repair functions authorized at
parameters.
various maintenance levels.
(5) Align. To adjust specified variable
b Section II designates overall responsibility for
elements of an item to bring about optimum or
the performance of maintenance functions on the
desired performance.
identified end item or component and the work
(6) C a l i b r a t e . To determine and cause
measurement time required to perform the functions
corrections to be made or to be adjusted on in-
by the designated maintenance level. The im-
struments or test measuring and diagnostic
plementation of the maintenance functions upon the
equipments used in precision measurements.
end item or component will be consistent with the
Consists of comparison of two instruments, one of
assigned maintenance functions.
which is a certified standard of known accuracy, to
c. Section III lists the tools and test equipment
detect and adjust any discrepancy in the accuracy of
required for each maintenance function as referenced
the instrument being compared.
from Section II.
(7) Install. The act of emplacing, seating, or
d. Section IV contains supplemental instructions,
fixing into position an item, part or module (com-
explanatory notes and/or illustrations required for a
ponent or assembly) in a manner to allow the proper
particular maintenance function.
functioning of an equipment or system.
(8) Replace. The act of substituting a ser-
a. Column (1.), Group Number. Column 1 lists
viceable like type part, sub-assembly, or module
group numbers to identify related components,
(component or assembly) for an unserviceable
assemblies, sub-assemblies, and modules with their
counterpart.
next higher assembly. The applicable groups are
(9) Repair. The application of maintenance
listed in the MAC in disassembly sequence begin-
services (inspect, test, service, adjust, align.
ning with the first group removed.
calibrate, or replace) or other maintenance actions
b. Column (2.), Component/Assembly. This
(welding, grinding, riveting, straightening, facing,
column contains the noun names of components,
remachining or resurfacing) to restore serviceability
assemblies, sub-assemblies and modules for which
to an item by correcting specific damage, fault,
maintenance is authorized.
malfunction, or failure in a part, sub-assembly,
c. Column (3), Maintenance Functions. This
module (component or assembly), end item, or
column lists the functions to be performed on the
system.
item listed in Column 2. The maintenance functions
(10) Overhaul. That maintenance effort
are defined as follows:
(service/action) necessary to restore an item to a
completely serviceable/operational condition as
(1) Inspect. To determine serviceability of an
item by comparing its physical, mechanical, and/or
prescribed by maintenance standards (i.e., DMWR)
electrical characteristics with established standards
in appropriate technical publications. Overhaul is
through examination.
normally the highest degree of maintenance per-
(2) Test. To verify serviceability and detect
formed by the Army. Overhaul does not normally
incipient failure by measuring the mechanical or
return an item to like new condition.
electrical characteristics of an item and comparing
(11) R e b u i l d . Consists of those ser-
those characteristics with prescribed standards.
vices/actions necessary for the restoration of un-
(3) Sevvice. Operations required periodically to
serviceable equipment to a like new condition in
keep an item in proper operating condition, i.e., to
accordance with original manufacturing standards.
clean (decontaminated), to preserve, to drain, to
Rebuild is the highest degree of materiel main-
paint, or to replenish fuel, lubricants, hydraulic
tenance applied to Army equipment. The rebuild
fluids, or compressed air supplies.
operation includes the act of returning to zero those
