Appendix B. MAINTENANCE ALLOCATION CHART

TM 55-1670-259-20

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

j. Overhaul. To restore an item to completely

B-1. GENERAL.

serviceable condition as prescribed by maintenance

This appendix contains explanations of all main-

standards in technical publications for each item of

tenance and repair functions authorized the various

equipment.

categories of maintenance. The maintenance alloca-

tion chart assigns authorized maintenance functions

k . Rebuild. To restore equipment as nearly as

to the lowest maintenance category based on skills

possible to new condition in accordance with original

available, time required, tools and test equipment

manufacturing standards.

authorized.

l. Symbols. The upper case letter placed in the

B-2. MAINTENANCE FUNCTIONS.

appropriate column indicates the lowest category at

Maintenance functions will be limited to and defined

which that particular maintenance function is to be

as follows:

performed.

a. Inspect. To determine serviceability of an item

B-3. EXPLANATION OF FORMAT.

by comparing the physical, mechanical, and electrical

Purpose and use of the format are as follows:

characteristics with established standards.

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

b. Test. To verify serviceability and to detect

number, the purpose of which is to identify com-

electrical or mechanical failure by use of test equip-

p o n e n t s , assemblies, subassemblies, and modules

ment.

with the next higher assembly.

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

b. Column 2 - Functional Group. Column 2 lists

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

desired that elements, such as painting and lubri-

the noun names of components, assemblies, sub-

assemblies, and modules on which maintenance is

cating, be defined separately, they may be so listed.

authorized.

d. Adjust. To rectify to the extent necessary to

c. Column 3 - Maintenance Functions. Column 3 is

bring into proper operating range.

divided into subcolumns to indicate the maintenance

functions authorized for the components, assemblies,

e. Align. To adjust specified variable elements of

and subassemblies. Each maintenance function which

an item to bring to optimum performance.

is indicated for the entire assembly is applicable to

all major components , and each function indicated for

f. Calibrate. To determine the corrections to be

the major component is applicable to all items of the

made in the readings of instruments or test equipment

component, except that the term "replace" applies

used in precise measurement. Consists of the com-

only to the assembly, component, or item beside

parison of two instruments, one of which is a certified

which it appears.

standard of known accuracy, to detect and adjust any

discrepancy in the accuracy of the instrument being

d. Use of Symbols. The symbols used to indicate

compared with the certified standard.

the five categories of maintenance authorized for

Army material are as follows:

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

environment such as an emplacement, site, or vehicle.

(1) C - Operator or crew

(2) O - Organizational maintenance

(3) F - Direct support maintenance

h. Replace. To replace unserviceable items with

(4) H - General support maintenance

serviceable assemblies, subassemblies, or parts.

(5) D - Depot maintenance

i. Repair. To restore an item to serviceable condi-

e. Column 4 - Tools and Equipment. This column

tion through correction of material damage a a speci-

will be used to specify, by code, those tools and test

fied failure.

B-1