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MAINTENANCE ALLOCATION CHART
S e c t i o n I. INTRODUCTION
and air. (If it is desired that elements, such
B-1.
General
as  painting  and  lubricating,  be  defined
a. This section provides a general explanation of
separately, they may be so listed.)
all maintenance and repair functions authorized at
D-Adjust: To rectify to the extent necessary to
various  maintenance  levels.
bring into proper operating range.
b. Section II designates overall responsibility for
E-Aline: To adjust specified variable elements
the performance of maintenance functions on the
o f an item to bring to optimum performance.
identified  end  item  or  component.  The  im-
F-Calibrate: To determine the corrections to
plementation of the maintenance functions upon
be made in the readings of instruments or
the identified end item or component will be
teat equipment used in precise measurement.
c o n s i s t e n t with the assigned maintenance functions.
Consists of the comparison of two in-
c. S e c t i o n I I I . ( N o t a p p l i c a b l e ) .
struments,  one of which is a certified
d. S e c t i o n I V . ( N o t a p p l i c a b l e ) .
standard of known accuracy, to detect and
B-2. Explanation of Columns in Section II
adjust any discrepancy in the accuracy of
a. Group Number, Column (1). The  assembly
the instrument being compared with the
group number is a numerical group assigned to
certified standard.
each assembly. The assembly groups are listed on
G-Install: To set up for use in an operational
the MAC in disassembly sequence beginning with
e n v i r o n m e n t such as an emplacement, site, or
the first assembly removed in a top down
vehicle.
disassembly sequence.
H-Replace: To replace unserviceable items
b. Functional Group, Column (2). This column
with serviceable like items.
contains a brief description of the components of
I-Repair:  Those  maintenance  operations
each assembly group.
necessary to restore an item to serviceable
c. Maintenance Functions, Column (3). This
condition through correction of material
column lists the various maintenance functions (A
damage or a specific failure. Repair may be
through K). The upper caae letter placed in the
accomplished at each level of maintenance.
appropriate column indicates the lowest main-
J-Overhaul: Normally, the highest degree of
t e n a n c e level authorized to perform these functions.
maintenance performed by the Army in
The active repair time required to perform the
order to minimize time work is in process
m a i n t e n a n c e function is included directly below the
consistent with quality and economy of
symbol identifying the category of maintenance.
operation. It consists of that maintenance
The symbol designations for the various main-
necessary to restore an item to completely
tenance levels are as follows:
serviceable condition  a s  p r e s c r i b e d  b y
C-Operator or crew
in
technical
maintenance
standards
O-Organizational
maintenance
publications for each item of equipment.
F-Direct support maintenance
Overhaul normally does not return on item
H-General support maintenance
to like new, zero mileage, or zero hour
D - D e p o t maintenance
condition.
The  maintenance  functions  are  defined  as
K-Rebuild: The highest degree of materiel
follows:
maintenance.  It  consists  of  restoring
A-Inspect: To determine serviceability of an
equipment as nearly as possible to new
item by comparing its physical, mechanical,
with
original
condition
in
accordance
and
electrical
characteristics
with
manufacturing standards. Rebuild is per-
established standards.
formed only when required by operational
B-Test: To verify serviceability and to detect
considerations or other paramount factors
electrical or mechanical failure by use of text
and then only at the depot maintenance
equipment.
level. Rebuild reduces to zero the hours or
C-Service: To clean, to preserve, to charge,
miles the equipment. or component therof,
and to add fuel. lubricants, cooling agents,
has been in use.

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