TM 11-6125-220-20
APPENDIX B
MAINTENANCE ALLOCATION
Section I.
INTRODUCTION
type part, subassembly, or module (component or as-
B-1. General
This appendix provides a summary of the maintenance
sembly) for an unserviceable counterpart.
operations for PU-543( )/A. It authorizes categories of
maintenance for specific maintenance functions on re-
i. Repair. The application of maintenance services
(inspect, test, service, adjust, align, calibrate, replace)
pairable items and components and the tools and equip-
ment required to perform each function. This appendix
or other maintenance actions (welding, grinding, riveting,
may be used as an aid in planning maintenance opera-
straightening, facing, remachining, or resurfacing) to re-
tions.
store serviceability to an item by correcting specific dam-
age, fault, malfunction, or failure in a part, subassembly,
B-2. Maintenance Function
module (component or assembly), end item, or system.
Maintenance functions will be limited to and defined as
This function does not include the trial and error replace-
follows:
ment of running spare type items such as fuses, lamps,
a. Inspect. To determine the serviceability of an
or electron tubes.
item by comparing its physical, mechanical, and/or elec-
trical characteristics with established standards through
j. Overhaul. That maintenance effort (service/action)
examination.
necessary to restore an item to a completely serviceable/
operational condition as prescribed by maintenance stan-
b. Test. To verify serviceability and to detect inci-
dards (i.e., DMWR) in appropriate technical publications.
pient failure by measuring the mechanical or electrial
Overhaul is normally the highest degree of maintenance
characteristics of an item and comparing those char-
performed by the Army. Overhaul does not normally
acteristics with prescribed standards.
return an item to like new condition.
c. Service. Operations required periodically to keep
k. Rebuild. Consists of those services/actions ne-
an item in proper operating condition, i.e., to clean
cessary for the restoration of unserviceable equipment
(decontaminate), to preserve, to drain, to paint, or to
to a like new condition in accordance with original man-
replenish fuel, lubricants, hydraulic fluids, or compres-
ufacturing standards. Rebuild is the highest degree of
sed air supplies.
materiel maintenance applied to Army equipment. The
rebuild operation includes the act of returning to zero
d. Adjust. To maintain, within prescribed limits,
those age measurements (hours, miles, etc.) considered
by bringing into proper or exact position, or by setting
in classifying Army equipments/components.
the operating characteristics to the specified parameters.
B-3. Column Entries
a. Column 1, Group Number. Column 1 lists group
e. Align. To adjust specified variable elements
numbers, the purpose of which is to identify components,
of an item to bring about optimum or desired perfor-
assemblies, subassemblies, and modules with the next
mance.
higher assembly.
f. Calibrate. To determine and cause corrections
b. Column 2, Component/Assembly. Column 2
to be made or to be adjusted on instruments or test
contains the noun names of components, assemblies,
measuring and diagnostic equipments used in precision
subassemblies, and modules for which maintenance is
measurement. Consists of comparisons of two instru-
authorized.
ments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the
c. Column 3, Maintenance Functions. Column 3
accuracy of the instrument being compared.
lists the functions to be performed on the item listed in
column 2. When items are listed without maintenance
g. Install. The act of emplacing, seating, or fixing
functions, it is solely for purpose of having the group
into position an item, part, module (component or as-
numbers in the MAC and RPSTL coincide.
sembly) in a manner to allow the proper functioning
of the equipment or system.
d. Column 4, Maintenance Category. Column 4
specifies, by the listing of a "worktime" figure in the
h. Replace. The act of substituting a serviceable like
B-1
