MAINTENANCE ALLOCATION CHART - TM-10-5430-238-12-P0143

TM 10-5430-238-12&P

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OPERATOR AND UNIT MAINTENANCE

(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

COLLAPSIBLE FABRIC TANK, FUEL STORAGE, 3,000, 10,000,

20,000, AND 50,000 GALLON TANKS

MAINTENANCE ALLOCATION CHART

MAINTENANCE ALLOCATION CHART (MAC)

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/Marine Corps 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 shall 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 requirements (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) contain supplemental

instructions and explanatory notes for a particular maintenance function.

Maintenance Functions

Maintenance functions will be limited to and defined as follows:

1. 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.

2. Test - To verify serviceability of an item by comparing its physical, mechanical, and/or electrical

characteristics with prescribed standards.

3. 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,

hydraulic fluids, or gases.

4. Adjust - To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting

the operating characteristics to specified parameters.

5. Align - To adjust specified variable elements of an item to bring out optimum or desired performance.

6. Calibrate - To determine and cause corrections to be made or to be adjusted on instruments or test,

measuring, and diagnostic equipment 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.

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