TM 11-6625-599-12, C4
supplies.
A2-3. Column Entries
d. Adjust. Maintain within prescribed limits by
a. Column 1, Group Number. Column 1 lists
bringing into proper or exact position, or by setting
group numbers, the purpose of which is to identify
the operating characteristics to the specified
components, assemblies, subassemblies, and
parameters.
modules with the next higher assembly.
e. Align. To adjust specified variable elements of
b. Column 2, Component/Assembly. Column 2
an item to about optimum or desired performance.
contains the noun names of components, assemblies,
f. Calibrate. To determine and cause corrections
subassemblies, and modules for which maintenance
to be made or to be adjusted on instruments or test
is authorized.
measuring and diagnostic equipment used in preci-
c. Column 3, Maintenance functions. Column 3
sion measurement. Consists of the comparison of
lists the functions to be performed on the item listed
two instruments, one of which is a certified standard
in column 2. When items are listed without mainte-
of known accuracy, to detect and adjust any discre-
nance functions, it is solely for purpose of having the
pancy in the accuracy of the instrument being com-
group numbers in the MAC and RPSTL coincide.
pared.
d. Column 4, Maintenance Category. Column 4
g. Install. The act of emplacing, seating, or fixing
specifies, by the listing of a ``worktime" figure in
into position an item, part, module (component or as-
the appropriate subcolumn(s), the lowest level of
sembly) in a manner to allow the proper functioning
maintenance authorized to perform the function
of the equipment/system.
listed in column 3. This figure represents the active
h. Replace. The act of substituting a serviceable
time required to perform that maintenance function
like-type part, subassembly, model (component or
at the indicated category of maintenance. If the
assembly) for an unserviceable counterpart.
number or complexity of the tasks within the listed
maintenance function vary at different mainte-
i. Repair. The application of maintenance services
nance categories, appropriate ``worktime" figures
(inspect, test, service, adjust, align, calibrate,
will be shown for each category. The number of
replace) or other maintenance actions (welding,
man-hours specified by the ``worktime" figure
grinding, riveting, straightening, facing, remachin-
represents the average time required to restore an
ing, or resurfacing) to restore serviceability to an
item (assembly, subassembly, component, module,
item by correcting specific damage, fault, malfunc-
end item or system) to a serviceable condition under
t i o n , or failure in a part, subassembly,
typical field operating conditions. This time in-
module/component/assembly, end item or system.
cludes preparation time, troubleshooting time and
This function does not include the trial and error
quality assurance/quality control time in addition to
replacement of running spare type items such as
the time required to perform the specific tasks iden-
fuses, lamps, or electron tubes.
tified for the maintenance functions authorized in
j. Overhaul. That periodic maintenance effort
the maintenance allocation chart. Subcolumns of
(service/action) necessary to restore an item to a
column 4 are as follows:
completely serviceable/operational condition as
prescribed by maintenance standards (e.g., DMWR)
C-Operator/Cmw
O-Organizational
in appropriate technical publications. Overhaul is
F--Direct Support
normally the highest degree of maintenance per-
H-General Support
formed by the Army. Overhaul does not normally
D-Depot
return an item to like-new condition.
e. Column 5, Tools and Equipment. Column 5
k. Rebuild. Consists of those services/actions
specifies by code, those common tool sets (not in-
necessary for the restoration of unserviceable equip-
dividual tools) and special tools, test, and support
ment to a like-new condition in accordance with
equipment required to perform the designated func-
original manufacturing standards. Rebuild is the
tion.
highest degree of material maintenance applied to
Army equipment. The rebuild operation includes the
A 2 - 4 . Tool and Test Equipment Require-
act of returning to zero those age measurements
ments (Table I)
(hours, miles, etc.) considered in classifying Army
a. Tool or Test Equipment Reference Code. The
equipment/components.
numbers in this column coincide with the numbers
2
