TM-9-2330-356-14
SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1
TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1990
TM-9-2330-356-14 - Page 471 of 528
TM 9-2330-356-14
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1.
General
a. This section provides a general explanation of all
maintenance and repair functions authorized at the
various maintenance levels.
b. The Maintenance Allocation Chart (MAC) in
Section II designates overall authority and responsibility
for the performance of maintenance functions on the
identified end item or component. The application of the
maintenance functions to the end item or component will
be consistent with the capacities and capabilities of the
designated maintenance levels.
c. Section III lists the tools and test equipment
(both special tools and common tool sets) required for
each maintenance function as referenced from Section II.
d. Section IV contains supplemental instructions
and explanatory notes for a particular maintenance func-
tion.
B-2.
Maintenance Functions
Maintenance functions will be limited to and defined as
follows:
a. Inspect.
To determine the serviceability of an item
by comparing its physical, mechanical, and/or electrical
characteristics with established standards through
examination (e.g., by sight, sound, or feel).
b. Test.
To verify serviceability by measuring the me-
chanical, pneumatic, hydraulic, or electrical characteris-
tics of an item and comparing those characteristics with
prescribed standards.
c. Service.
Operations required periodically to keep
an item in proper operating condition, i.e., to clean
(includes decontaminate, when required), to preserve, to
drain, to paint, or to replenish fuel, lubricants, chemical
fluids, or gases.
d. Adjust.
To maintain or regulate, within prescribed
limits, by bringing into proper or exact position, or by set-
ting the operating characteristics to specified parameters.
e. Aline.
To adjust specified variable elements of an
item to bring about optimum or desired performance.
f. Calibrate.
To determine and cause corrections to
be made or to be adjusted on instruments or test,
measuring, and diagnostic equipments used in precision
measurement.
Consists of comparisons of two
instruments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the
accuracy of the instrument being compared.
g. Removel/Install.
To remove and install the same
item when required to perform service or other
maintenance functions. Install may be the act of
emplacing, seating, or fixing into position a spare, repair
part, or module (component or assembly) in a manner to
allow the proper functioning of an equipment or system.
h. Replace.
To remove an unserviceable item and
install a serviceable counterpart in its place. “Replace” is
authorized by the MAC and is shown as the third position
of the SMR code.
i. Repair.
The application of maintenance services,
including fault location/troubleshooting, removal/ instal-
lation, and disassembly/assembly procedures, and mainte-
nance actions to identify troubles and restore
serviceability to an item by correcting specific damage,
fault, malfunction, or failure in a part, subassembly, mod-
ule (component or assembly), end item, or system.
j. Overhaul.
That maintenance effort (service/ac-
tion) prescribed to restore an item to a completely servi-
ceable/operational condition as required by maintenance
standards in appropriate technical publications (i.e.,
DMWR). Overhaul is normally the highest degree of
maintenance performed by the Army. Overhaul does not
normally return an item to like new condition.
k. Rebuild.
Consists of those services/actions
necessary for the restoration of unserviceable equipment
to a like new condition in accordance with original
manufacturing standards. Rebuild is the highest degree of
materiel maintenance applied to Army equipment. The
rebuild operation includes the act of returning to zero
those age measurements (hours/miles, etc.) considered in
classifying Army equipment/components.
B-3.
Explanation of Columns In the MAC,
Section II
a. Column 1, Group Number.
Column 1 lists
functional group code numbers, the purpose of which is to
identify maintenance significant components, assemblies,
subassemblies, and modules with the next higher
assembly. End item group number shall be “00.”
b. Column 2, Component/Assembly.
Column 2 con-
tains the names of components, assemblies, subassem-
blies, and modules for which maintenance is authorized.
B-1
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