APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
is desired that elements, such as painting and lubri-
B-1. General
cating, be defined separately, they may be so listed.
a. This section provides a general explanation of
D -- Adjust: To rectify to the extent necessary to
all maintenance and repair functions authorized at
bring into proper operating range.
various maintenance levels.
D -- Aline: To adjust specified variable elements of
b. Section II designates overall responsibility for
an item to bring to optimum performance.
the performance of maintenance functions on the
F -- Calibrate: To determine the corrections to be
identified end item or component. The implementa-
made in the readings of instruments or test equip-
tion of the maintenance functions upon the end item
ment used in precise measurement. Consists of the
or component will be consistent with the assigned
comparison of two instruments, one of which is a
maintenance functions.
certified standard of known accuracy, to detect and
c. Section III lists the special tools and test equip-
adjust any discrepancy in the accuracy of the instru-
ment required for each maintenance function as ref-
ment being compared with the certified standard.
erenced 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.
I -- Repair: Those maintenance operations neces-
B-2. Explanation of Columns in Section II
sary to restore an item to serviceable condition
a. Group Number, Column (1). The assembly group
through correction of material damage or a specific
is a numerical group assigned to each assembly in a
failure. Repair may be accomplished at each category
top down breakdown sequence. The applicable assem-
of maintenance.
bly groups are listed on the MAC in disassembly seq-
J -- Overhaul: Normally, the highest degree of
quence beginning with the first assembly removed
maintenance performed by the Army in order to
in a top down disassembly sequence.
minimize time work in process is consistent with
b. Functional Group, Column (2). This column con-
quality and economy of operation. It consists of that
tains a brief description of the components of each
maintenance necessary to restore an item to com-
assembly group.
pletely serviceable condition as prescribed by main-
c. Maintenance Functions, Column (3). This col-
tenance standards in technical publications for each
umn lists the various maintenance functions (A
item of equipment. Overhaul normally does not re-
through K) and indicates the lowest maintenance
turn an item to like new, zero mileage, or zero hour
category authorized to perform these functions. The
condition.
symbol designations for the various maintenance
K -- Rebuild: The highest degree of materiel main-
categories are as follows:
tenance. It consists of restoring equipment as nearly
C -- Operator or crew
as possible to new condition in accordance with orig-
O -- Organizational maintenance
inal manufacturing standards. Rebuild is performed
F -- Direct support maintenance
only when required by operational considerations
H -- General support maintenance
or other paramount factors and then only at the depot
The maintenance functions are defined as follows:
maintenance category. Rebuilt reduces to zero the
A -- Inspect: To determine serviceability of an
hours or miles the equipment, or component thereof,
item by comparing its physical, mechanical, and
has been in use.
electrical characteristics with established standards.
d. Tools and Equipment, Column (4). This column
B -- Test: To verify serviceability and to detect
is provided for referencing by code the special tools
electrical or mechanical failure by use of test equip-
and test equipment (see III), required to perform the
ment.
maintenance functions (see II).
C -- Service: To clean, to preserve, to charge, and
e. Remarks, Column (5). This column is provided
to add fuel, lubricants, cooling agents, and air. If it
