Appendix C. MAINTENANCE ALLOCATION

TM 11-6780-225-12

APPENDIX C

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

not limited to welding, grinding, riveting, straightening,

C-1. General

and replacement of parts other than the trial and error

This appendix provides a summary of the maintenance

replacement of running spare type items such as fuses,

operations covered in the equipment literature for

lamps, or electron tubes.

Darkroom, Photographic, Transportable ES-82A.

j. Overhaul. Normally, the highest degree of

authorizes categories of maintenance for specific

maintenance performed by the Army in order to

maintenance functions on repairable items and

minimize time work in process is consistent with quality

components and the tools and equipment required to

and economy of operation.

It consists of that

perform each function. This appendix may be used as

maintenance necessary to restore an item to completely

an aid in planning maintenance operations.

serviceable condition as prescribed by maintenance

C-2. Maintenance Functions

standards in technical publications for each item of

equipment. Overhaul normally does not return an item

Maintenance functions will be limited to and defined as

to like new, zero mileage, or zero hour condition.

follows:

k. Rebuild.

The highest degree of materiel

a. Inspect. To determine serviceability of an item

maintenance. It consists of restoring equipment as

by comparing its physical, mechanical, and electrical

nearly as possible to new condition in accordance with

characteristics with established standards.

original manufacturing standards. Rebuild is performed

b. Test. To verify serviceability and to detect

only when required by operational considerations or

incipient electrical or mechanical failure by use of

other paramount factors and then only at the depot

special equipment such as gages, meters, etc. This is

maintenance category. Rebuild reduces to zero the

accomplished with external test equipment and does not

hours or miles the equipment, or component thereof,

include operation of the equipment and operator type

has been in use.

tests using internal meters or indicating devices.

l. Symbols. The uppercase letter placed in the

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

appropriate column indicates the lowest level at which

to add fuel, lubricants, cooling agents, and air. If it is

that particular maintenance function is to be performed.

desired that elements, such as painting and lubricating,

be defined separately, they may be so listed.

C-3. Explanation of Format

d. Adjust. To rectify to the extent necessary to

a. Column 1, Group Number. Column 1 lists group

bring into proper operating range.

numbers, the purpose of which is to identify

e. Align. To adjust two or more components or

components, assemblies, subassemblies, and modules

assemblies of an electrical or mechanical system so that

with the next higher assembly.

their functions are properly synchronized. This does not

b. Column 2, Functional Group. Column 2 lists the

include setting the frequency control knob of radio

noun

names

components,

assemblies,

receivers or transmitters to the desired frequency.

subassemblies, and modules on which maintenance is

f. Calibrate. To determine the corrections to be

authorized.

made in the reading of instruments or test equipment

c. Column 3, Maintenance Functions. Column 3

used in precise measurement.

Consists of the

lists the maintenance category at which performance of

comparison of two instruments, one of which is a

the specific maintenance function is authorized.

certified standard of known accuracy, to detect and

Authorization to perform a function at any category also

adjust any discrepancy in the accuracy of the instrument

includes authorization to perform that function at higher

being compared with the certified standard.

categories. The codes used represent the various

g. Install. To set up for use in an operational

maintenance categories as follows:

environment such as an encampment, site, or vehicle.

Code

Maintenance Category

h. Replace. To replace unserviceable items with

C .................................. Operator/Crew

serviceable like items.

O.................................. Organizational maintenance

F. ................................. Direct support maintenance

i. Repair. To restore an item to serviceable

H .................................. General support maintenance

condition through correction of a specific failure or

D .................................. Depot maintenance

unserviceable condition. This function includes, but is

Change 1

C-1