TM 5-6350-255-13
APPENDIX B.
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. General
(6) Calibrate.
To determine and cause
a. This section provides a general explanation of all
corrections to be made or to be adjusted on instruments
maintenance and repair functions authorized at various
or test measuring and diagnostic equipments used in
maintenance levels.
precision measurement. Consists of comparison of two
instruments, one of which is a certified standard of
performance of maintenance functions on the identified
known accuracy, to detect and adjust any discrepancy in
end item or component and the work measurement time
the accuracy of the instrument being compared.
required to perform the functions by the designated
(7) Install. The act of emplacing, seating, or fixing
maintenance level.
The implementation of the
into position an item, part or module (component or
maintenance functions upon the end item or component
assembly) in a manner to allow the proper functioning of
will be consistent with the assigned maintenance
an equipment or system.
functions.
(8) Replace. The act of substituting a serviceable
like type part, subassembly, or module (component or
required for each maintenance function as referenced
assembly) for an unserviceable counterpart.
from Section II.
(9) Repair.
The application of maintenance
B-2. Explanation of Columns in Section II
a.
services (inspect, test, service, adjust, align, calibrate, or
Column (1), Group Number. Column 1 lists group
replace) or other maintenance actions (welding, grinding,
numbers to identify related components, assemblies,
riveting,
straightening,
facing,
remachining
or
subassemblies, and modules with their next higher
resurfacing) to restore serviceability to an item by
assembly. The applicable groups are listed in the MAC
correcting specific damage, fault, malfunction, or failure
in disassembly sequence beginning with the first group
in a part, subassembly, module (component or
removed.
assembly), end item, or system.
b. Column (2), Component/Assembly. This column
(10)Overhaul.
That
maintenance
effort
contains the noun names of components, assemblies,
(service/action) necessary to restore an item to a
subassemblies and modules for which maintenance is
completely
serviceable/operational
condition
as
authorized.
prescribed by maintenance standards (i.e., DMWR) in
c. Column (3), Maintenance Functions.
This
appropriate technical publications. Overhaul is normally
column lists the functions to be performed on the item
the highest degree of maintenance performed by the
listed in Column 2. The maintenance functions are
Army. Overhaul does not normally return an item to a
defined as follows:
like new condition.
(1) Inspect. To determine serviceability of an
(11) Rebuild.
Consists of those services/actions
item by comparing its physical, mechanical, and/or
necessary for the restoration of unserviceable equip-
electrical characteristics with established standards
ment to a like new condition in accordance with original
through examination.
manufacturing standards. Rebuild is the highest degree
of materiel maintenance applied to Army equipment.
(2) Test. To verify serviceability and detect
The rebuild operation includes the act of returning to zero
incipient failure by measuring the mechanical or
those age measurements (hours/miles, etc.) considered
electrical characteristics of an item and comparing those
in classifying Army equipment/components.
characteristics with prescribed standards.
d. Column (4), Maintenance Category. This column is
(3) Service. Operations required periodically
made up of subcolumns for each category of
to keep an item in proper operating condition, i.e., to
maintenance. Work time figures are listed in these
clean (decontaminate), to preserve, to drain, to paint, or
subcolumns for the lowest level of maintenance
to replenish fuel, lubricants, hydraulic fluids, or
authorized to perform the function listed in Column
compressed air supplies.
3. These figures indicate the average active time
(4) Adjust.
To maintain within prescribed
required to perform the maintenance function at the
limits, by bringing into proper or exact position, or by
indicated category of maintenance under typical field
setting the operating characteristics to specified
operating conditions. e.
Column (5), Tools and
parameters.
Equipment. This column
(5) Align.
To adjust specified variable
elements of an item to bring about optimum or desired
performance.
B-1
