MAINTENANCE ALLOCATION CHART
Section 1. INTRODUCTION
B-Test. To verify serviceability and to detect
electrical or mechanical failure by use of test
a. This section provides a general explanation
of all maintenance and repair functions authorized
C-Service. To clean, to preserve, to charge,
at various maintenance levels.
and to add fuel, lubricants, cooling agents, and air.
b. Section II designates overall responsibility
If it is desired that elements, such as painting and
for the performance of maintenance functions on
lubricating, be defined separately, they may be so
the identified end item or component. The imple-
mentation of the maintenance functions upon the
D-Adjust. To rectify to the extent necessary
end item or component will be consistent with the
to bring into proper operating range.
assigned maintenance functions.
E-Align. To adjust specified variable elements
c. Section 111 (Special Tools and Test Equip-
of an item to bring to optimum performance.
ment ) -Not applicable.
F-Calibrate. To determine the corrections to
d. Section IV contains supplemental instruc-
be made in the readings of instruments or test
t i o n s , explanatory notes and/or illustrations
equipment used in precise measurement. Consists
required for a particular maintenance function.
of the comparison of two instruments, one of
which is a certified standard of known accuracy,
B-2. Explanation of Coiumns in
to detect and adjust any discrepancy in the ac-
curacy of the instrument being compared with the
a. Group Number, Column (1). The assembly
group is a numerical group assigned to each as-
G-Install. To set up for use in an operational
sembly in a top down breakdown sequence. The
environment such as an emplacement, site, or
applicable assembly groups are listed on the MAC
in disassembly sequence beginning with the first
H-Replace. To replace unserviceable items
assembly removed in a top down disassembly
with serviceable like items.
I - R e p a i r . Those maintenance operations
b. Assembly Group, Column (2). This column
necessary to restore an item to serviceable condi-
contains a brief description of the components of
tion through correction of material damage or a
each assembly group.
specific failure. Repair may be accomplished at
each category of maintenance.
c. Maintenance Functions, Column (3). This
J-Overhaul, Normally, the highest degree of
column lists the various maintenance functions
maintenance performed by the Army in order to
(A through K) and indicates the lowest mainte-
minimize time work in process is consistent with
nance category authorized to perform these
quality and economy of operation. It consists of
functions. The symbol designations for the various
that maintenance necessary to restore an item to
maintenance categories are as follows:
completely serviceable condition as prescribed by
G--Operator or Crew
maintenance standards in technical publications
F--Direct Support Maintenance
for each item of equipment. Overhaul normally
H--General Support Maintenance
does not return an item to like new, zero mileage
or zero hour condition.
The maintenance functions are defined as follows:
K-Rebuild. The highest degree of materiel
maintenance. It consists of restoring equipment
A-Inspect. To determine serviceability of an
as nearly as possible to new condition in accord-
item by comparing its physical, mechanical, and
ance with original manufacturing standards.
electrical characteristics with established stand-
Rebuild is performed only when required by op-