Section I. INTRODUCTION
not limited to welding, grinding, riveting, straightening,
and replacement of parts other than the trial and error
This appendix provides a summary of the maintenance
replacement of running spare type items such as fuses,
operations covered in the equipment literature for
lamps, or electron tubes.
Darkroom, Photographic, Transportable ES-82A.
j. Overhaul. Normally, the highest degree of
authorizes categories of maintenance for specific
maintenance performed by the Army in order to
maintenance functions on repairable items and
minimize time work in process is consistent with quality
components and the tools and equipment required to
and economy of operation.
It consists of that
perform each function. This appendix may be used as
maintenance necessary to restore an item to completely
an aid in planning maintenance operations.
serviceable condition as prescribed by maintenance
C-2. Maintenance Functions
standards in technical publications for each item of
equipment. Overhaul normally does not return an item
Maintenance functions will be limited to and defined as
to like new, zero mileage, or zero hour condition.
The highest degree of materiel
a. Inspect. To determine serviceability of an item
maintenance. It consists of restoring equipment as
by comparing its physical, mechanical, and electrical
nearly as possible to new condition in accordance with
characteristics with established standards.
original manufacturing standards. Rebuild is performed
b. Test. To verify serviceability and to detect
only when required by operational considerations or
incipient electrical or mechanical failure by use of
other paramount factors and then only at the depot
special equipment such as gages, meters, etc. This is
maintenance category. Rebuild reduces to zero the
accomplished with external test equipment and does not
hours or miles the equipment, or component thereof,
include operation of the equipment and operator type
has been in use.
tests using internal meters or indicating devices.
l. Symbols. The uppercase letter placed in the
c. Service. To clean, to preserve, to charge, and
appropriate column indicates the lowest level at which
to add fuel, lubricants, cooling agents, and air. If it is
that particular maintenance function is to be performed.
desired that elements, such as painting and lubricating,
be defined separately, they may be so listed.
C-3. Explanation of Format
d. Adjust. To rectify to the extent necessary to
a. Column 1, Group Number. Column 1 lists group
bring into proper operating range.
numbers, the purpose of which is to identify
e. Align. To adjust two or more components or
components, assemblies, subassemblies, and modules
assemblies of an electrical or mechanical system so that
with the next higher assembly.
their functions are properly synchronized. This does not
b. Column 2, Functional Group. Column 2 lists the
include setting the frequency control knob of radio
subassemblies, and modules on which maintenance is
f. Calibrate. To determine the corrections to be
made in the reading of instruments or test equipment
c. Column 3, Maintenance Functions. Column 3
used in precise measurement.
Consists of the
lists the maintenance category at which performance of
comparison of two instruments, one of which is a
the specific maintenance function is authorized.
certified standard of known accuracy, to detect and
Authorization to perform a function at any category also
adjust any discrepancy in the accuracy of the instrument
includes authorization to perform that function at higher
being compared with the certified standard.
categories. The codes used represent the various
g. Install. To set up for use in an operational
maintenance categories as follows:
environment such as an encampment, site, or vehicle.
h. Replace. To replace unserviceable items with
C .................................. Operator/Crew
serviceable like items.
O.................................. Organizational maintenance
F. ................................. Direct support maintenance
i. Repair. To restore an item to serviceable
H .................................. General support maintenance
condition through correction of a specific failure or
D .................................. Depot maintenance
unserviceable condition. This function includes, but is