MAINTENANCE ALLOCATION CHART
Section- I. INTRODUCTION
Service: Operations required periodically to keep an
explanation of all maintenance and repair functions
item in proper operating conditions, i.e., to clean, to preserve,
authorized at various maintenance levels.
to drain, to paint, or to replenish fuel, lubricants, hydraulic
Section II designates overall responsibility
fluids, or compressed air supplies.
for the performance of maintenance functions on the
Adjust: To maintain within prescribed limits, by
identified end item or component and the work
bringing into proper or exact position, or by setting the
measurement time required to perform the functions by
operating characteristics to specified parameters.
the designated maintenance level. The implementation
Aline: To adjust specified variable elements of an
of the maintenance functions upon the end item or
item to bring about optimum or desired performance.
component will be consistent with the assigned
Calibrate: To determine and cause corrections to be
made or to be adjusted on instruments or test measuring and
Section III Special Tools and Test
diagnostic equipments used in precision measurement.
Equipment Required for Each Maintenance Function
Consists of comparisons of two instruments, one of which is a
Referenced From Section II (Not Applicable).
certified standard of known accuracy, to detect and adjust any
discrepancy in the accuracy of the instrument being
instructions or explanatory notes for a particular
maintenance function (Not Applicable).
Install: The act of emplacing, seating, or fixing into
position an item, part, or module (component or assembly) in
Explanation of Columns in Section II
a manner to allow the proper functioning of an equipment or
Column (1), Group Number. A number is
assigned to each group in a top down breakdown
Replace: The act of substituting a serviceable like
sequence. The applicable groups are listed on the MAC
type part, subassembly, or module (component or assembly)
in disassembly sequence beginning with the first group
for an unserviceable counterpart.
Repair: The application of maintenance services
Column (2), Assembly Group.
(inspect, test, service, adjust, align, calibrate, or replace) or
column contains a brief description of the components
other maintenance actions (welding, grinding, riveting,
of each numerical group.
straightening, facing, remachining or resurfacing) to restore
Column (3), Maintenance Functions.
serviceability to an item by correcting specific damage, fault,
This column lists the various maintenance functions (A
malfunction, or failure in a part, subassembly, module
through K). The lowest maintenance level authorized to
(component or assembly), end item, or system.
perform these functions is indicated by a symbol in the
Overhaul: That maintenance effort (service/action)
appropriate column. Work measurement time standards
necessary, to restore an item to a completely
(the active repair time required to perform the
maintenance function) are shown directly below the
maintenance standards (i.e., DMWR) ill appropriate technical
symbol identifying the maintenance level. The symbol
publication. Overhaul is normally the highest degree of
designations for the various maintenance levels are as
maintenance performed by the Army. Overhaul does not
normally return an item to like new condition.
Consists of those services/actions
Operator or crew.
necessary, for the restoration of unserviceable equipment to a
like new condition in accordance with original manufacturing
Direct support maintenance.
General support maintenance.
Rebuild is the highest degree of material maintenance applied
to Army equipment. The rebuild operation includes the act of
returning to zero those age measurement (hours/miles, etc.)
The maintenance functions are defined as follows:
considered in classifying Army equipment/components.
Column (4), Tools and Equipment. This
column is provided for referencing by code the special
Inspect: To determine serviceability of an item by
tools and test equipment (sec III) required to perform the
comparing its physical, mechanical, and electrical
maintenance functions (sec II).
Column (5), Remarks. This column is
provided for referencing by code the remarks (sec IV)
Test: To verify serviceability and detect incipient
pertinent to the maintenance functions.
failure by measuring the mechanical or electrical
characteristics of an item and comparing those characteristics
with prescribed standards.