TM 10-8340-240-12&P
0020 00-1 Change 1
MODULAR GENERAL PURPOSE TENT SYSTEM (MGPTS) 0020 00
MAINTENANCE ALLOCATION CHART (MAC)
INTRODUCTION
The Army Maintenance System MAC
This introduction provides a general explanation of all maintenance and repair functions authorized at
various maintenance levels under the Standard Army maintenance System concept.
The MAC (immediately following the introduction) designates overall authority and responsibility for the
performance of maintenance functions on the identified end item or component. The application of the
maintenance functions to the end item or component will be consistent with the capacities and capabilities of
the designated maintenance levels, which are shown on the MAC in column (4) as:
Unit - includes two sub-columns, C (operator/crew) and O (unit) maintenance.
Direct Support - includes an F sub-column.
General Support - includes an H sub-column.
Depot - includes a D sub-column.
The tools and test equipment (immediately following the MAC) list the tools and test equipment (both
special tools and common tool sets) required for each maintenance function as referenced from the MAC.
The remarks (immediately following the tools and test equipment requirements) contains supplemental
instructions and explanatory notes for a particular maintenance function.
MAINTENANCE FUNCTIONS
Maintenance functions are limited to and defined as follows:
a. Inspect. To determine the serviceability of an item by comparing its physical,
mechanical and/or electrical characteristics with established standards through examination (e.g. by
sight, sound, or feel).
b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic,
or electrical characteristics of an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating
condition, e.g. to clean (includes decontaminate, when required), to preserve, to
drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases.
d. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper
position, or by setting the operating characteristics to specified parameters.
e. Align. To adjust specified variable elements of an item to bring about optimum
performance
f.
Calibrate. To determine and cause corrections to be made or to be adjusted on
instruments or test, measuring, and diagnostic equipment’s used in precision measurement.
