Appendix B. MAINTENANCE ALLOCATION - TM-11-6625-2478-120037

TM 11-6625-2478-12

APPENDIX B

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

B-1. General

j. Overhaul Normally, the highest degree of

maintenance performed by the Army in order to

This appendix provides a summary of the maintenance

minimize timework in process is consistent with quality

operations covered in the equipment literature.

and economy of operation.

It consists of that

authorizes categories of maintenance for specific

maintenance necessary to restore an item to completely

maintenance functions on repairable items and

serviceable condition as prescribed by maintenance

components and the tools and equipment required to

standards in technical publications for each item of

perform each function. This appendix may be used as

equipment Overhaul normally does not return an item to

an aid in planning maintenance operations.

B-2. Maintenance Functions

like new, zero mileage, or zero hour condition.

k. Rebuild.

The highest degree of materiel

Maintenance functions will be limited to and defined as

maintenance. It consists of restoring equipment as

follows

a. Inspect. To determine serviceability of an item by

nearly as possible to new condition in accordance with

original manufacturing standards. Rebuild is performed

comparing its physical, mechanical, and electrical

only when required by operational considerations or

characteristics with established standards.

b. Test.

other paramount factors and then only at the depot

To verify serviceability and to detect

maintenance category. Rebuild reduces to zero the

incipient electrical or mechanical failure by use of

hours or miles the equipment, or component thereof, has

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

been in use.

accomplished with external test equipment and does not

l. Symbol. The uppercase letter placed in the

include operation of the equipment and operator type

appropriate column indicates the lowest level at which

tests using internal meters or indicating devices.

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

that particular maintenance function is to be performed.

B-3. Explanation of Format

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

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

desired that elements, such as painting and lubricating,

numbers, the purpose of which is to identify

be defined separately, they may be so listed.

d. Adjust. To rectify to the extent necessary to bring

components, assemblies, subassemblies and modules

with the next higher assembly.

into proper operating range.

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

e. Align. To adjust two or more components or

noun names of components, assemblies, subassemblies

assemblies of an electrical or mechanical system so that

and modules on which maintenance is authorized.

their functions are properly synchronized. This does not

c. Column S Maintenance Functions. Column 3 lists

include setting the frequency control knob of radio

the maintenance category at which performance of the

receivers or transmitters to the desired frequency.

f: Calibrate. To determine the corrections to be

specific

maintenance

function

authorized.

Authorization to perform a function at any category also

made in the readings of instruments or test equipment

includes authorization to perform that function at higher

used in precise measurement.

Consists of the

categories. The codes used represent the various

comparison of two instruments, one of which is a

maintenance categories as follows:

certified standard of known accuracy, to detect and

adjust any discrepancy in the accuracy of the instrument

Code

Maintenance Category

being compared with the certified standard.

C................................................... Operator/crew

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

O................................................... Organizational

environment such as an encampment, site, or vehicle.

maintenance

h. Replace. To replace unserviceable items with

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

serviceable like item.

maintenance

i. Repair.

To restore an item to serviceable

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

condition through correction of a specific failure of

maintenance

unserviceable condition. This function includes, but is

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

not limited to welding, grinding, riveting, straightening,

and replacement of parts other than the trial and error

replacement of running spare type items such as fuses,

lamps, or electron tubes.

B-1