Appendix C. MAINTENANCE ALLOCATION CHART

APPENDIX C

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

C-1. General

Service. To clean, to preserve, to charge. and to add

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a. This section provides a general explanation of

fuel, lubricants, cooling agents, and air. if it is de-

all maintenance and repair functions authorized at

sired that elements, such as painting and lubricating,

various maintenance levels.

be defined separately, they may he so listed.

b. Section II designates overall responsibility for

Adjust. To rectify to the extent necessary to bring into

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proper operating range.

the performance of maintenance functions on the

Align. To adjust specified variable elements of an item

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identified end item or component. The implementa-

to bring to optimum performance.

tion of the maintenance functions upon the end item

Calibrate. To determine the corrections to he made in

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or component will be consistent with the assigned

the readings of instruments or test equipment used

maintenance functions.

in precise measurement. Consists of the comparison

of two instruments, one of which is a certified stand-

c. Section III lists the special tools and test equip-

ard of known accuracy, to detect and adjust any dis-

ment required for each maintenance function as

crepancy in the accuracy of the instrument being

referenced from Section II.

compared with the certified standard.

d. Section IV contains supplemental instructions,

Install. To set up for use in an operational environ-

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explanatory notes and/or illustrations required for a

ment such as an emplacement. site, or vehicle.

particular maintenance function.

To replace unserviceable items with serviceable like

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items.

C-2. Explanation of Columns in Section II

Repair. Those maintenance operations necessary to re-

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store an item to serviceable condition through cor-

a. Group Number, Column (1). The assembly group

rection of material damage or a specific failure. Re-

is a numerical group assigned to each assembly in a

pair may be accomplished at each category of main-

top down breakdown sequence. The applicable as-

tenance.

Overhaul. Normally, the highest degree of maintenance

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sembly groups are listed on the MAC in disassembly

performed by the Army in order to minimize time

sequence beginning with the first assembly removed

work in process is consistent with quality and econ-

in a top down disassembly sequence.

omy of operation. It consists of that maintenance

b. Functional Group, Column (2). This column

necessary to restore an item to completely service-

contains a brief description of the components of

able condition ax prescribed by maintenance stand-

ards in technical publications for each item of equip-

each assembly group.

ment. Overhaul normally does not return an item to

c. Maintenance Functions. Column (3). This col-

like new, zero mileage, or zero hour condition.

umn lists the various maintenance functions (A

Rebuild. The highest degree of material maintenance.

K-

through K) and indicates the lowest maintenance

It consists of restoring equipment as nearly as possi-

category authorized to perform these functions. The

ble to new condition in accordance with original

symbol designations for the various maintenance

manufacturing standards. Rebuild is performed only

when required by operational considerations or other

categories are as follows:

paramount factors and then only at the depot main-

- Operator or crew

tenance category. Rebuild reduces to zero the hours

- Organizational maintenance

or miles the equipment, or component thereof, has

- Direct support maintenance

been in use.

- General support maintenance

- Depot maintenance

The maintenance functions are defined as follows:

d. Tools and Equipment, Column (4). This column

is provided for referencing by code the special tools

and test equipment, (sec. III) required to perform

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Inspect. To determine serviceability of an item by com-

the maintenance functions (sec. II).

paring its physical. mechanical, and electrical charac-

e. Remarks, Column (5). This column is provided

teristics with established standards.

for reference by code the remarks (Section IV) perti-

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Test. To verify serviceability and to detect electrical

nent to the maintenance functions.

or mechanical failure by use of test equipment.

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