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TM 5-4120-369-14
MAINTENANCE ALLOCATION CHART
INTRODUCTION
Section I.
C-1.
GENERAL.
This section provides a general explanation of all maintenance and repair functions
a.
authorized at various maintenance levels.
The Maintenance Allocation Chart (MAC) in Section II designates overall responsibility
b.
for the performance of maintenance functions on the identified end item or component. The
implementation of the maintenance functions upon the end item or component will be consistent
with the assigned maintenance functions.
c. Section III list a the special tools and test equipment required for each maintenance
function as referenced from Section II.
d.
Section IV contains supplemental instructions on explanatory notes for a particular
maintenance function.
MAINTENANCE FUNCTIONS.
C-2.
To determine the serviceability of an item by comparing its physical,
a. Inspect.
mechanical and/or electrical characteristics with established standards through examination.
b . Test. To verify serviceability and detect incipient failure by measuring the mechanical or
electrical characteristics of an item and comparing those characteristics with prescribed standards.
Operations required periodically to keep an item in proper operating condition,
c . Service.
to clean (decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants,
hydraulic fluids, or compressed air supplies.
d. Adjust.
To maintain, within prescribed limits, by bringing into proper or exact
position, or by setting the operating characteristics to specified parameters.
e. Align.
To adjust specified variable elements of an item to bring about optimum or
desired performance.
f . Calibrate. To determine and cause corrections to be made or to be adjusted on
instruments os test measuring and diagnostic equipments used in precision measurement.
Consists of comparisons of two instruments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being
compared.
g. Install. The act of emplacing, seating, or fixing into position an item, part, or
module (component or assembly) in a manner to allow the proper functioning of an equipment
or system.
h . Replace. The act of substituting a serviceable like type part, subassembly, or
module (component or assembly) for an unserviceable counterpart.
i. Repair. The application of maintenance services (inspect, test, service, adjust,
align, calibrate, or replace) or other maintenance actions (welding, grinding, riveting,
straightening, facing, remachining, or resurfacing) to restore serviceability to an item by
correcting specific damage, fault, malfunction, or failure in a part, subassembly y, module
(component or assembly) , and item, or system.
j. Overhaul.
That maintenance effort (services/actions) necessary to restore an item
to a completely serviceable/operational condition as prescribed by maintenance standards (i.e.,
DMWR) in appropriate technical publications. Overhaul is normally the highest degree of
maintenance performed by the Army. Overhaul does not normally return en item to like new
condition.
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