MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
lubricating, be defined separately, they may be so listed.
a. This section provides a general explanation of all
D. ADJUST: To rectify to the extent necessary to
maintenance and repair functions authorized at various
bring into proper operating range.
E. ALINE: To adjust specified variable elements of
b. Section II designates overall responsibility for the
an item to bring to optimum performance.
performance of maintenance functions on the identified
F. CALIBRATE: To determine the corrections to be
end item or component. The implementation of the
made in the readings of instruments or test equipment
maintenance functions upon the end item or component
used in precise measurement.
Consists of the
will be consistent with the assigned maintenance
comparison of two instruments, one of which is a
certified standard of known accuracy, to detect and
c. Section III lists the special tools and test
adjust any discrepancy in the accuracy of the instrument
equipment required for each maintenance function as
being compared with the certified standard.
referenced from Section II.
G. INSTALL: To set up for use in an operational
d. Section IV contains supplemental instructions,
environment such as an emplacement, site, or vehicle.
explanatory notes and/or illustrations required for a
H. REPLACE: To replace unserviceable items with
particular maintenance function.
serviceable like items.
Those maintenance operations
C-2. Explanation of Columns in Section II
necessary to restore an item to serviceable condition
through correction of material damage or a specific
a. Group Number, Column (1). The assembly
failure. Repair may be accomplished at each category of
group is a numerical group assigned to each assembly in
a top down breakdown sequence.
J. OVERHAUL: Normally, the highest degree of
assembly groups are listed on the MAC in disassembly
maintenance performed by the Army in order to minimize
sequence beginning with the first assembly removed in a
time work in process is consistent with quality and
top down disassembly sequence.
economy of operation. It consists of that maintenance
b. Assembly Group, Column (2). This column
necessary to restore an item to completely serviceable
contains a brief description of the components of each
condition as prescribed by maintenance standards in
technical publications for each item of equipment.
c. Maintenance Functions, Column (S).
Overhaul normally does not return an item to like new,
column lists the various maintenance functions (A
zero mileage, or zero hour condition.
through K) and indicates the lowest maintenance
The highest degree of materiel
category authorized to perform these functions. The
maintenance. It consists of restoring equipment as
symbol designations for the various maintenance
nearly as possible to new condition in accordance with
categories are as follows:
original manufacturing standards. Rebuild is performed
C -Operator or crew
only when required by operational considerations or
O -Organizational maintenance
other paramount factors and then only at the depot
F -Direct support maintenance
maintenance category. Rebuild reduces to zero the
H -General support maintenance
hours or miles the equipment, or component thereof, has
D -Depot maintenance The maintenance functions are
been in use.
defined as follows:
A INSPECT: To determine serviceability of an
d. Tools and Equipment, Column (4). This column
item by comparing its physical, mechanical, and
is provided for referencing by code the special tools and
electrical characteristics with established standards.
test equipment, (sec III) required to perform the
B. TEST: To verify serviceability and to detect
maintenance functions (sec II).
electrical or mechanical failure by use of test equipment.
e. Remarks, Column (5). This column is provided
C. SERVICE: To clean, to preserve, to charge, and
for referencing by code the remarks (sec IV) pertinent to
to add fuel, lubricants, cooling agents, and air. If it is
desired that elements, such as painting and