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TM 11-5820-882-23/TM 06827A-23/2
Section I
B-l. General
to restore serviceability to an item by correcting
specific damage, fault, malfunction, or failure in a
This appendix provides a summary of the maintenance
part, subassembly, module (component or assembly),
operations for AN/PRC68. It authorizes categories of
end item, or system.
maintenance for specific maintenance functions on
Overhaul. That maintenance effort (service/act-
repairable items and components and the tools and
ion) necessary to restore an item to a completely ser-
equipment required to perform each function. This ap-
viceable/operational condition as prescribed by mainte-
pendix may be used as an aid in planning maintenance
nance standards (i.e., DMWR) in appropriate technical
publications. Overhaul is normally the highest degree of
B-2. Maintenance Function
maintenance performed by the Army. Overhaul does not
normally return an item to like new condition.
Maintenance functions will be limited to and
k. Rebuild. Consists of those services/actions
defined as follows:
necessary for the restoration of unserviceable equip-
a.  Inspect.  To determine the serviceability of an
ment to a like new condition in accordance with
item by comparing its physical, mechanical, and/or
original manufacturing standards. Rebuild is the highest
electrical characteristics with established standards
degree of materiel maintenance applied to Army equip-
through examination.
ment. The rebuild operation includes the act of return-
b. Test.  To verify serviceability and to detect inci-
ing to zero those age measurements (hours, miles, etc.)
pient failure by measuring the mechanical or electrical
considered in classifying Army equipments/com-
characteristics of an item and comparing those charac-
teristics with prescribed standards.
c. Service. Operations required periodically to
keep an item in proper operating condition, i.e., to
Column 1, Group Number. Column 1 lists
clean (decontaminate), to preserve, to drain, to paint, or
group numbers, the purpose of which is to identify com-
to replenish fuel, lubricants, hydraulic fluids, or com-
ponents, assemblies, subassemblies and modules with
pressed air supplies,
the next higher assembly,
d. Adjust.  To maintain, within prescribed limits,
b. Column 2, Component/Assembly. Column 2
by bringing into proper or exact position, or by setting
contains the noun names of components, asemblies,
the operating characteristics to the specified parameters.
subassemblies, and modules for which maintenance is
e.  Align.  To adjust specified variable elements of
an item to bring about optimum or desired perfor-
c. Column 3, Maintenance Functions. Column 3
lists the functions to be performed on the item listed in
f. Calibrate.  To determine and cause corrections
column 2. When items are listed without maintenance
to be made or to be adjusted on instruments or test
functions, it is solely for purpose of having the group
measuring and diagnostic equipments used in precision
numbers in the MAC and RPSTL coincide.
measurement. Consists of comparisons of two instru-
d. Column 4, Maintenance Category. column 4
ments, one of which is a certified standard of known ac-
specifies, by the listing of a "work time" figure in the
curacy, to detect and adjust any discrepancy in the ac-
appropriate subcolumn (s), the lowest level of mainte-
curacy of the instrument being compared.
nance authorized to perform the function listed in
g. Install. The act of emplacing, seating, or fixing
column 3. This figure represents the active time required
into position an item, part, module (component or
to perform that maintenance function at the indicated
assembly) in a manner to allow the proper functioning
category of maintenance. If the number or complexity
of the equipment or system.
of the tasks within the listed maintenance function vary
h. Replace.  The act of substituting a serviceable
at different maintenance categories, appropriate "work
like type part, subassembly, or module (component or
time" figures will be shown for each category. The
assembly) for an unserviceable counterpart.
number of task-hours specified by the "work time"
Repair. The application of maintenance services
figure represents the average time required to restore an
(inspect, test, service, adjust, align, calibrate, replace)
item (assembly, subassembly, component, module, end
or other maintenance actions (welding, grinding, rivet-
item or system) to a serviceable condition under typical
ing, straightening, facing, remachining, or resurfacing)

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