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TM 11-5831-201-20
APPENDIX C
MAINTENANCE ALLOCATION
Section I. INTRODUCTION
curacy of the instrument being compared with
C-1. General
the certified standard.
This appendix provides a summary of the main-
g. Install. To set up for use in an operational
tenance operations covered in the equipment
environment such as an encampment, site, or
literature for Control, Intercommunication Set
vehicle.
C-1611D/AIC. It authorizes categories of main-
tenance for specific maintenance functions on re-
h. Replace. To replace unserviceable items with
pairable items and components and the tools and
serviceable like items.
equipment required to perform each function.
i. Repair. To restore an item to serviceable
This appendix maybe used as an aid in planning
condition through correction of a specific failure
maintenance operations.
or unserviceable condition. This function includes,
but is not limited to welding, grinding, riveting,
C-2. Maintenance Functions
straightening, and replacement of parts other
Maintenance functions will be limited to and de-
than the trial and error replacement of running
fined as follows:
spare type items such as fuses, lamps, or electron
tubes.
a. Inspect. To determine serviceability of an
item by comparing its physical, mechanical, and
j. Overhaul. Normally, the highest degree of
electrical characteristics with established stan-
maintenance performed by the Army in order to
dards.
minimize time work in process consistent with
quality and economy of operation. It consists of
b. Test. To verify serviceability and to detect
that maintenance necessary to restore an item to
incipient electrical or mechanical failure by use
completely serviceable condition as prescribed by
of special equipment such as gages, meters, etc.
maintenance standards in technical publications
This is accomplished with external test equipment
for each item of equipment. Overhaul normally
and does not include operation of the equipment
does not return an item to like new, zero mileage,
and operator type tests using internal meters or
or zero hour condition.
indicating devices.
k. Rebuild. The highest degree of materiel
c. Service. To clean, to preserve, to charge, and
maintenance. It consists of restoring equipment
to add fuel, lubricants, cooling agents, and air. If
as nearly as possible to new condition in accord-
it is desired that elements, such as painting and
a n c e with original manufacturing standards.
lubricating, be defined separately, they may be so
Rebuild is performed only when required by op-
listed.
erational considerations o r  o t h e r  p a r a m o u n t
d. Adjust. To rectify to the extent necessary to
factors and then only at the depot maintenance
bring into proper operating range.
category. Rebuild reduces to zero the hours or
e. Aligm To adjust two or more components or
miles the equipment, or component thereof, has
assemblies of an electrical or mechanical system
been in use.
so that their functions are properly synchronized.
l Symbols. The uppercase letter placed in the
This does not include setting the frequency control
appropriate column indicates the lowest level at
knob of radio receivers or transmitters to the
which that particular maintenance function is to
desired frequency.
be performed.
f. Calibrate. To determine the corrections to
C-3. Explanation of Format
be made in the readings of instruments or test
equipment used in precise measurement. Consists
a. Column 1, Group Number. Column 1 lists
of the comparison of two instruments, one of
group numbers, the purpose of which is to iden-
which is a certified standard of known accuracy,
tify components, assemblies, subassemblies, and
to detect and adjust any discrepancy in the ac-
modules with the next higher assembly.
C-1


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