TM 3-4310-100-20 & P
Section I. INTRODUCTION
fault, malfunction, or failure in a part, subassembly,
module (component or assembly), end item, or system.
authorized maintenance functions assigned the
(service/action) necessary to restore an item to a
maintenance categories for maintenance of the AN-M4
prescribed by maintenance standards (i.e., DMWR) in
maintenance to insure complete support of the
appropriate technical publications. Overhaul is normally
the highest degree of maintenance performed by the
B-2. Maintenance functions
Army. Overhaul does not normally return and item to like
Maintenance functions will be limited to and defined as
k. Rebuild. Consists of those services/actions
a. Inspect. To determine the serviceability of an
necessary for the restoration of unserviceable equipment
item by comparing its physical, mechanical and/or
to a like new condition in accordance with original
electrical characteristics with established standards
manufacturing standards. Rebuild is the highest degree
of material maintenance applied to Army equipment.
To verify serviceability and detect
The rebuild operation includes the act of returning to zero
incipient failure by measuring the mechanical or
those age measurements (hours/miles, etc.) considered
electrical characteristics of an item and comparing those
in classifying Army equipments/components.
characteristics with prescribed standards.
c. Service. Operations required periodically to
keep an item in proper operating condition, i.e., to clean
B-3. Column entries
(decontaminate), to preserve, to drain, to paint, or to
a. Column 1, Group Number. Column 1 lists
replenish fuel, lubricants, hydraulic fluids, or compressed
group numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules
d. Adjust. To maintain, within prescribed limits,
with next higher assembly.
by bringing into proper or exact position, or by setting the
b. Column 2, Component/Assembly. Column 2
operating characteristics to specified parameters.
contains the noun names of components, assemblies,
e. Align. To adjust specified variable elements of
subassemblies, and modules for which maintenance is
an item to bring about optimum or desired performance.
c. Column 3, Maintenance Functions. Column
To determine and cause
3 lists the function to be performed on the item listed in
corrections to be made or to adjusted on instructions or
test measuring and diagnostic equipments used in
d. Column 4, Maintenance Category. Column 4
precision measurement. Consists of comparisons of two
instruments, one of which is a certified standard known
specifies, by the listing of a "work time" figure in the
accuracy, to detect and adjust any discrepancy in the
appropriate subcolumn(s), the lowest level of
accuracy of the instrument being impaired.
maintenance 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 to perform that maintenance function at the
into position an item, part, or module (component or
indicated category of maintenance. If the number or
assembly) in a manner to allow the proper functioning of
complexity of the tasks within the listed maintenance
an equipment or system.
function vary at different maintenance categories,
h. Replace. The act of substituting a serviceable
appropriate "work time"
like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
Repair. The application of maintenance
services or other maintenance actions to restore
serviceability to an item by correcting specific damage,