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TM 3-6665-225-12
C1. General
C-3. Column entries
Entries for these columns are explained below:
The maintenance allocation chart, section II, lists
a. Column 1, Group Number. Column 1 lists
the authorized maintenance functions assigned
group numbers, the purpose of which is to
the maintenance categories for maintenance of the
identify components, assemblies, subassemblies,
M8 and M10 through M18 alarm systems. This
and modules with the next higher assembly.
chart is to be used by all levels of maintenance to
b. Column 2, Component/Assembly. Column 2
insure complete support of the equipment.
contains the noun names of components, assem-
C2. Maintenance functions.
blies, subassemblies, and modules for which
maintenance is authorized.
Maintenance functions are limited to and defined
c. Column 3, Maintenance Functions. Column
as follows:
3 lists the functions to be performed on the item
a. Inspect. To determine the serviceability of
listed in Column 2.
an item by comparing its physical, mechanical, or
d. Column 4. Maintenance Category. Column 4
electrical characteristics with established stand-
specifies, by the listing of a "work time" (WT)
ards through examination.
figure in the appropriate subcolumns, the lowest
b. Test. To verify serviceability and detect
level of maintenance authorized to perform the
incipient failure by measuring the mechanical or
function listed in Column 3. This figure represents
electrical characteristics of an item and comparing
the active time required to perform that mainte-
those characteristics with prescribed standards.
nance function at the indicated category of main-
c. Service. Operations required periodically to
tenance. If the number or complexity of the tasks
keep an item in proper operating condition, i.e., to
within the listed maintenance function vary at
clean, to paint, and replace M229 Refill Kit
components in the M43 Detector Kit.
different maintenance categories, appropriate
"work time" figures are shown for each category.
d. Adjust. To maintain, within prescribed
The number of man-hours specified by "work
limits, by bringing into proper or exact position,
time" figure represents the average time required
or by setting the operating characteristics to
to restore an item to a serviceable condition under
specified parameters.
typical field operating conditions. This time in-
e. Install. The act of emplacing, seating, or
fixing into position an item, part, or module in a
cludes preparation time, troubleshooting time,
manner to allow the proper functioning of an
and quality assurance/quality control time in
addition to the time required to perform the
equipment or system.
specific tasks identified for the maintenance func-
f. Replace. The act of substituting a service-
able like type assembly, or module for an unserv-
tions authorized in the maintenance allocation
chart. This time is expressed in man-hours and
iceable counterpart.
carried to one decimal place (tenths of hours).
g. Repair. The application of maintenance
e. Column 5. Tools and Equipment. Column 5
services or other maintenance actions to restore
specifies by code, those common tool sets and
serviceability to an item by correcting specific
special tools, test, and support equipment re-
damage, fault, malfunction, or failure in a part,
quired to perform the designated function.
subassembly, module end item, or system.
h. Overhaul.  T h a t m a i n t e n a n c e e f f o r t
C-4. Tool and Test Equipment Requirements
necessary to restore an item to a completely serv-
List -- Section Ill
iceable or operational condition as prescribed by
This list identifies all tools and test equipment re-
maintenance standards in appropriate technical
quired for maintenance and repair of the M8 and
publications. Overhaul is normally the highest
M10 through M18 Alarm Systems as specified in
degree of maintenance performed by the Army.
the maintenance allocation chart. The list gives
Overhaul does not normally return an item to like
tool or test equipment reference codes, user main-
new condition.

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