APPENDIX B. MAINTENANCE ALLOCATION CHART

TM 5-4320-273-14

APPENDIX B

M A I N T E N A N C E ALLOCATION CHART

Section I. INTRODUCTION

B-1. General.

to be made or to be adjusted on instruments or test

a. This section provides a general explanation of

measuring and diagnostic equipments used in

all maintenance and repair functions authorized at

precision measurement, Consists of comparison of

various maintenance levels.

two instruments, one of which is a certified standard

b. Section II designates overall responsibility for

of known accuracy, to detect and adjust any

the performance of maintenance functions on the

discrepancy in the accuracy of the instrument being

identified end item or component and the work

compared.

measurement time required to perform the functions

(7) Install. The act of emplacing, seating, or

by the designated maintenance level, The im-

fixing into position an item, part or module (com-

plementation of the maintenance functions upon the

ponent or assembly) in a manner to allow the proper

end item or component will be consistent with the

functioning of an equipment or system.

assigned maintenance functions.

(8) Replace. The act of substituting a serviceable

c. Section III lists the tools and test equipment

like type part, subassembly, or module (component or

required for each maintenance function as referenc-

assembly) for an unserviceable counterpart.

ed from section II.

(9) Repair. The application of maintenance ser-

vices (inspect, test, service, adjust, align, calibrate, or

B-2. Explanation of Columns in Section Il.

replace) or other maintenance actions (welding,

a. Column (1) Group Number. Column 1 lists

g r i n d i n g , riveting, straightening, facing;

group numbers to identify related components,

remachining, or resurfacing) to restore serviceability

assemblies, subassemblies, and modules with their

to an item by correcting specific damage, fault,

next higher assembly. The applicable groups are list -

malfunction, or failure in a part, subassembly,

ed in the MAC in disassembly sequence beginning

module (component or assembly), end item, or system.

with the first group removed.

(10) Overhaul. That maintenance effort (ser-

b. Column (2) Component/Assembly. This column

vice/action) necessary to restore an item to a com-

contains the noun names of components, assemblies,

pletely serviceable/operational condition as

subassemblies and modules for which maintenance is

prescribed by maintenance standards (i.e., DMWR) in

authorized.

appropriate technical publications, Overhaul is nor-

c. Column (3) Maintenance Functions. This

mally the highest degree of maintenance performed

column lists the functions to be performed on the

by the Army. Overhaul does not normally return an

item listed in column 2. The maintenance functions

item to a like new condition,

are defined as follows

(11) Rebuild. Consists of those services/actions

(1) Inspect. To determine serviceability of an

necessary for the restoration of unserviceable equip-

item by comparing its physical, mechanical, and/or

ment to a like new condition in accordance with

electrical characteristic with established standards

original manufacturing standards. Rebuild is the

through examination,

highest degree of materiel maintenance applied to

(2) Test. To verify serviceability and detect in-

Army equipment. The rebuild operation includes the

cipient failure by measuring the mechanical or elec-

act of returning to zero those age measurement

trical characteristic of an item and comparing those

(hours, miles, etc.) considered in classifying Army

characteristic with prescribed standards,

equipment/components,

(8) Service. Operations required periodically to

d. Column (4) Maintenance Category. This column

keep an item in proper operating condition, i.e., to

is made up of subcolumns for each category of main-

clean (decontaminated), to preserve, to drain, to

tenance. Work time figures are listed in these sub-

paint, or to replenish fuel, lubricants, hydraulic

columns for the lowest level of maintenance

fluids, or compressed air supplies.

authorized to perform the function listed in column 8,

(4) Adjust. To maintain within prescribed limits,

These figures indicate the average active time

by bringing into proper or exact position, or by set-

required to perform the maintenance function at the

ting the operating characteristics to specified

indicated category of maintenance under typical

parameters,

field operating conditions,

(5) Align. To adjust specified variable elements

of an item to bring about optimum or desired per-

e, Column (5) Tools and Equipment. This column

formance.

is provided for referencing by code, the common tool

(6) Calibrate. To determine and cause corrections

sets (not individual tools), special tools, test and sup-

B-1