TM 9-2330-294-14
MAINTENANCE
ALLOCATION
CHART
Section I. INTRODUCTION
electrical characteristics with established standards
C-1. General
through examination.
The purpsoe of the maintenance allocation chart
e. Install. The act of emplacing, seating, or fixing
(MAC) is to allocate specific maintenance operations
into position an item, part, module (component or
to the proper maintenance level and category.
assembly) in a manner to allow the proper func-
Allocation of maintenance operations is made on the
tioning of the equipment/system.
basis of time, tools, and skills normally available to
f. Overhaul. That, maintenance effort (ser-
the various maintenance categories in a combat
vice/action) necessary to restore an item to a
situation and influenced by maintenance policy and
completely serviceable/operational condition as
sound maintenance practices, as outlined in AR 750-
prescribed by maintenance standards (e.g. DMWR)
1.
in pertinent technical publications. Overhaul is
This appendix is divided into three sections as
normally the highest degree of maintenance per-
follows:
formed by the Army. Overhaul does not normally
Section I. Introduction
return an item to like-new condition.
Section II. Maintenance Allocation Chart
g. Rebuild. Consists of those services/actions
(MAC)
necessary for the restoration of unserviceable
S e c t i o n III. Tool and Test Equipment
equipment to a like-new condition in accordance with
Requirements
original manufacturing standards. Rebuild is the
C-2. Maintenance Functions
highest degree of materiel maintenance applied to
The maintenance allocation chart designates overall
Army equipment. The rebuild operation includes the
responsibility for the maintenance function on an
act of returning to zero those age measurements
end item or assembly. Repair and/or rebuild of
(hours, miles, etc.) considered in classifying Army
major assemblies is designated by authority of the
equipment/components.
Army Commander representative, except for the
h. Repair. The application of maintenance ser-
specific subfunctions listed in the maintenance
vices (inspect, test, service, adjust, aline, calibrate,
allocation chart. Deviations from maintenance
replace) or other maintenance actions (welding,
operations allocated in the maintenance allocation
g r i n d i n g , riveting, straightening, facing,
chart are authorized only upon approval of the Army
remachining or resurfacing) to restore serviceability
Commander representative. The maintenance
to an item by correcting specific damage, fault,
functions and definitions to be performed at the
malfunction or failure in a part, subassembly,
designated levels are listed below.
module (component or assembly), end item or
a. Adjust. Maintain within prescribed limits by
system.
bringing into proper or exact position, or by setting
i. Replace. The act of substituting a serviceable
the operating characteristics to the specified
like-type part, subassembly, module (component or
parameters.
assembly) in a manner to allow the proper func-
b. Aline. To adjust specified variable elements of
tioning of an equipment/system.
an item to bring about optimum or desired per-
j. Service. Operations required periodically to
formance.
keep an item in proper operating condition, ie; to
c. Calibrate. To determine and cause corrections
clean, preserve, drain, paint, or to replenish
to be made or to be adjusted on instruments or test
fuel/lubricants/hydraulic fluids or compressed air
measuring and diagnostic equipment. Consists of
supplies.
comparisons of two instmments, one of which is a
k. Test. To verify serviceability and to detect
cirtified standard of known accuracy, to detect and
incipient failure by measuring the mechanical or
adjust any discrepancy in the accuracy of the in-
electrical characteristics of an item and comparing
strument being compared.
those characteristics with prescribed standards.
d. Inspect. To determine the serviceability of an
l. Symbols. The uppercase letter placed in the
item by comparing its physical, mechanical, and/or
