APPENDIX C MAINTENANCE ALLOCATION CHART

TM 3-4240-201-13

APPENDIX C

MAINTENANCE ALLOCATION CHART

Section I.

INTRODUCTION

h. Replace. The act of substituting a serviceable

C-1. General

like-type part, subassembly, module (component or

The maintenance allocation chart (sec. II) lists the

assembly) in a manner to allow the proper functioning of

authorized maintenance functions assigned the

an equipment/system.

maintenance categories for maintenance of the ABC-

i. Repair. The application of maintenance services

M7A1 hospital gas-particulate filter unit. This chart is to

(inspect, test service, adjust, align, calibrate, replace) or

be used by all levels of maintenance to insure complete

other maintenance actions (welding, grinding, riveting,

support of the equipment.

straightening, facing, remachining, or resurfacing) to

restore serviceability to an item by correcting specific

C-2.

Maintenance Functions

damage, fault, malfunction, or failure in a part,

Maintenance functions authorized are limited to and

subassembly, module/component/assembly, end item or

defined as follows: a. Inspect. To determine the

system.

serviceability of an item by comparing its physical,

j. Overhaul. That maintenance effort (service/

mechanical and/or electrical characteristics with

action) necessary to restore an item to a completely

established standards through examination.

serviceable/operational condition as prescribed by

b. Test. To verify serviceability and to detect

maintenance standards (e.g., DMWR) in pertinent

incipient failure by measuring the mechanical or

technical publications. Overhaul is normally the highest

electrical characteristics of an item and comparing those

degree of maintenance performed by the Army.

characteristics with prescribed standards.

Overhaul does not normally return an item to like new

c. Service. Operations required periodically to

condition.

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

k. Rebuild. Consists of those services/actions

preserve, drain, paint, or to replenish fuel, lubricants,

necessary for the restoration of unserviceable equipment

hydraulic fluids, or compressed air supplies.

to a like-new condition in accordance with original

d. Adjust. To maintain, within prescribed limits, by

manufacturing standards. Rebuild is the highest degree

bringing into proper or exact position, or by setting the

of materiel maintenance applied to Army equipment.

operating characteristics to specified parameters.

The rebuild operation includes the act of returning to zero

e. Align. To adjust specified variable elements of

those age measurements (hours, miles, etc.) considered

an item to bring about optimum or desired performance.

in classifying Army equipment/components.

f. Calibrate. To determine and cause corrections

l. Symbols. The uppercase letter placed in the

to be made or to be adjusted on instruments or test

appropriate column indicates the lowest level at which

measuring and diagnostic equipments used in precision

that particular maintenance function is to be performed.

measurement.

Consists of comparisons of two

instruments, one of which is a certified standard of

known accuracy, to detect and adjust any discrepancy in

the accuracy of the instrument being compared.

g. Install. The act of emplacing, seating, or fixing

into position an item, part, or module (component or

assembly) in a manner to allow the proper functioning of

an equipment or system.

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