Section I. INTRODUCTION
C -- Service. To clean, to preserve, to charge, and
a. This section provides a general explanation of
to add fuel, lubricants, cooling agents, and air. If it is
all maintenance and repair functions authorized at
desired that elements, such as painting and lubrica-
various maintenance levels.
ting, be defined separately, they may be so listed.
b. Section II (designates overall responsibility for
D - Adjust. To rectify to the extent necessary to
the performance of maintenance functions on the
bring into proper operating range.
identified end item or component. The implementa-
E -- Align. To adjust specified variable elements
tion of the maintenance functions upon the end item
of an item to bring to optimum performance.
or component will be consistent with the assigned
F -- Calibrate. To determine the corrections to be
made in the readings of instruments or test equip-
c. Section III lists the special tools and test equip-
ment used in precise measurement. Consists of the
ment required for each maintenance function as
comparison of two instruments, one of which is a
referenced from Section II.
certified standard of known accuracy, to detect and
d. section IV contains supplemental instructions,
adjust any discrepancy in the accuracy of the instru-
explanatory notes and/or illustrations required for
ment being compared with the certified standard.
a particular maintenance function.
G -- Install. To set up for use in an operational
e n v i r o n m e n t such as an e m p l a c e m e n t , site, or
C-2. Explanation of Columns in Section II
a. Group Number, Column (1), The assembly group
H -- Replace. To replace unserviceable items with
is a numerical group assigned to each assembly in a
serviceable like items.
top down breakdown sequence. The applicable as-
I -- Repair. Those maintenance operations neces-
sembly groups are listed on the MAC in diassembly
s a r y to restore an item to serviceable condition
sequence beginning with the first assembly removed
through correction of material damage or a specific
in a top down disassembly sequence.
failure. Repair may be accomplished at each cate-
b. Functional Group, Column (2). This column con-
gory of maintenance.
tains a brief description of the components of each
J -- Overhaul. Normally, the highest degree of
m a i n t e n a n c e performed by the Army in order to
c. Maintenance Functions, Column (3).
minimize time work in process is consistent with
u m n lists the various maintenance functions (A
quality and economy of operation. It consists of that
through K) and indicates the lowest maintenance
maintenance necessary to restore an item to com-
category - authorized to perform these functions. The
pletely serviceable condition as prescribed by mainte-
symbol designations f o r the various maintenance
nance standards in technical publications for each
categories are as follows:
item of equipment. Overhaul normally does not re-
-- Operator or crew
turn an item to like new, zero mileage, or zero hour
-- Organizational maintenance
-- Direct support maintenance
K -- Rebuild. The highest degree of materiel main-
-- General support maintenance
tenance. It consists of restoring equipment as nearly
-- Depot maintenance
as possible to new condition in accordance with
The maintenance functions are defined as follows:
A -- Inspect. To determine serviceability of an
original manufacturing standards. Rebuild is p e r -
formed only when required by operational considera-
item by comparing its physical, mechanical, and
tions or other paramount factors and then only at the
electrical characteristic with established standards.
depot maintenance category. Rebuild reduces to zero
B -- Test. To verify serviceability and to detect
t h e hours or miles the equipment, or component
electrical or mechanical failure by use of test equip
thereof, has been in use.