MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
a. This section provides a general explanation of all
maintenance and repair functions authorized at various
b. Section II designates overall responsibility for
the performance of maintenance functions on the
identified end item or component. The implementation
of the maintenance functions upon the identified end
item or component will be consistent with the assigned
c. Section III lists the tools and test equipment
required for each maintenance function as refer-
enced from Section II.
d. Section IV contains supplemental instructions or
explanatory notes required for a particular mainten-
2. EXPLANATION OF COLUMNS IN SECTION II.
a. Group Number. Column 1. The assembly group
number is a numerical group assigned to each assem-
bly. The assembly groups are listed on the MAC in
disassembly sequence beginning with the first assem-
bly removed in a top down disassembly sequence.
b. Assembly Group. Column 2. This column con-
tains a brief description of the components of each
c. Maintenance Functions. Column 3. This column
lists the various maintenance functions (A through K).
The upper case letter placed in the appropriate
column indicates the lowest maintenance level author-
ized to perform these functions. The active repair
time required to perform the maintenance function is
included directly below the symbol identifying the
category of maintenance. The symbol designations for
the various maintenance levels are as follows:
C - Operator or Crew
O - Organizational Maintenance
F - Direct Support Maintenance
H - General Support Maintenance
D - Depot Maintenance
A - INSPECT.
functions are defined as follows:
To determine serviceability of an
item by comparing its physical, mechanical and
electrical characteristics with established standards.
B - TEST. To verify serviceability and to detect
electrical or mechanical failure by use of test equip-
C - SERVICE. To clean, to preserve, to charge and
to add fuel, lubricants, cooling agents and air. (If it is
desired that elements, such as painting and lubri-
cating, be defined separately, they may be so listed. )
D - ADJUST. To rectify to the extent necessary to
bring into proper operating range.
E - ALIGN. To adjust specified variable elements
of an item to bring to optimum performance.
F - CALIBRATE. To determine the corrections to
be made in the readings of instruments or test equip-
ment used in precise measurement. Consists of the
comparison of two instruments, one of which is a
certified standard of known accuracy, to detect and
adjust any discrepancy in the accuracy of the instru-
ment being compared with the certified standard.
G - INSTALL. To set-up for use in an operational
environment such as an emplacement, site or vehicle.
H - REPLACE. To replace unserviceable items with
serviceable like items.
I - REPAIR. Those maintenance operations neces-
sary to restrore an item to serviceable condition
through correction of material damage or a specific
failure. Repair may be accomplished at each level of
J - OVERHAUL. Normally, the highest degree of
maintenance performed by the Army in order to
minimize time work is in process consistent with
quality and economy of operation. It consists of that
maintenance necessary to restore an item to com-
pletely serviceable condition as prescribed by main-
tenance standards in technical publications for each
item of equipment. Overhaul normally does not return
an item to like new, zero mileage or zero hour con-
K - REBUILD. The highest degree of material
maintenance. It consists of restoring equipment as
nearly as possible to new condition in accordance with