APPENDIX B MAINTENANCE ALLOCATION CHART

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

in the accuracy of the instrument being compared with

B-1. General

certified standard.

a. This section provides a general explanation of all

G-Install: To set up for use in an operational

maintenance and repair functions authorized at various

environment such as an emplacement, site or vehicle.

maintenance levels.

H-Replace: To replace unserviceable items with

b. Section II designates overall responsibility for the

serviceable like items.

performance of maintenance functions on the identified

I-Repair: Those maintenance operations necessary to

end item or component. The implementation of the

restore an item to serviceable condition through

maintenance functions upon the end item or component

correction of material damage or a specific failure.

will be consistent with the assigned maintenance

Repair may be accomplished at each category of

functions.

maintenance.

c. Section III-Not applicable.

.J-Overhaul:

Normally, the highest degree of

d. Section IV contains supplemental instructions,

maintenance performed by the Army in order to

and explanatory notes required for a particular

minimize time work in process is consistent with

maintenance function.

quality and economy of operation It consists of that

B-2. Explanation of Columns in Section II

maintenance necessary to restore an item to

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

completely serviceable condition as prescribed by

is a numerical group assigned to each assembly in a top

maintenance standards in technical publications for

down breakdown sequence. The applicable assembly

each item of equipment. Overhaul normally does not

groups are listed on the MAC (Maintenance Allocation

return an item to like new, zero mileage, or zero hour

Chart) is disassembly sequence beginning with the first

condition.

assembly removed in a top down disassembly

K-Rebuild:

The highest degree of material

sequence.

maintenance. It consists of restoring equipment as

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

nearly as possible to new condition in accordance

contains a brief description of the component of each

with original manufacturing standards. Rebuild is

assembly group.

performed only when required by operational

c. Maintenance Functions, Column (3). This

considerations or other paramount factors and then

column lists the various maintenance functions (A

only at the depot maintenance category. Rebuild

through K) and indicates the lowest maintenance

reduces to zero hours or miles the equipment, or

category authorized to perform these functions. The

component thereof, has been in use

symbol designations

for the various maintenance

L-Symbols:

The uppercase letter placed in the

categories are as follows:

appropriate column indicates the lowest level at which

C-Operator or crew

that particular maintenance function is to be

O-Organizational maintenance

performed.

F-Direct support maintenance

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

H-General support maintenance

provided for referencing by code the special tools and

D-Depot maintenance

test equipment (sec. III) required to perform the

The maintenance functions are defined as follows:

maintenance function (sec. II).

A-Inspect: To determine serviceability of an item by

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

comparing its physical, mechanical, and electrical

for referencing by code the remarks (sec. IV I pertinent

characteristics with established standards.

to the maintenance functions.

B-Test To verify serviceability and to detect electrical or

B-3 Explanations of Columns in Section III- Not

mechanical failure by use of test equipment.

Applicable.

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

B-4. Explanations of Columns in Section IV

fuel, lubricants, cooling agents, and air.

a. Reference Code. This column consists of two

D-Adjust- To rectify to the extent necessary to bring into

letters separated by a dash, both of which are

proper operating range.

references to section II. The first letter references

E-Align: To adjust specified variable elements of an item

column 5 and the second letter references a

to bring to optimum performance.

maintenance function, column 3, A through K.

F- Calibrate: To determine the corrections to be made in

b. Remarks. This column lists information pertinent

the readings of instruments or test equipment used in

to the maintenance function being performed, as

precise measurements. Consists of the comparison of

indicated on the MAC, section II.

two instruments, one of which is a certified standard of

known accuracy, to detect and adjust any discrepancy

B-1