APPENDIX B MAINTENANCE ALLOCATION CHART

TM 5-4310-340-24

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

C-Service. Operations required periodically to keep an item in

B-1. General

proper operating condition, i.e., to clean, to preserve, to

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

a. This section provides a general explanation of all

fluids, or compressed air supplies.

maintenance and repair functions authorized at various

maintenance levels.

D-Adjust. To maintain within prescribed limits, by bringing

b. Section II designates overall responsibility for the

into proper or exact position, or by setting the operating

performance of maintenance functions on the identified end

characteristics to specified parameters.

item or component and the work measurement time required

to perform the functions by the designated maintenance level.

E-Align. To adjust specified variable elements of an item to

The implementation of the maintenance functions upon the

bring about optimum or desired performance.

end item or component will be consistent with the assigned

maintenance functions.

F-Calibrate. To determine and cause corrections to be made

c. Section III lists the special tools and test equipment

or to be adjusted on instruments to test measuring and

required for each maintenance function as referenced from

diagnostic equipments used in precision measurement.

Section II.

Consists of comparisons of two instruments, one of which

is a certified standard of known accuracy. to detect and

d. Section IV contains supplemental instructions or

adjust any discrepancy in the accuracy of the instrument.

explanatory notes for a particular maintenance function. (Not

being compared.

Applicable).

G-Install. The act of emplacing. seating, or fixing into

B-2. Explanation of Columns in Section II.

position an item.

part.

or module (component or

assembly) in a manner to allow the proper functioning of an

a. Column (1). Group Number. A number is assigned

equipment or system.

to each group in a top down breakdown sequence. The

applicable groups are listed on the MAC in disassembly

H-Replace. The act of substituting a serviceable like type

sequence beginning with the first group removed.

part. subassembly. or module (component or assembly)

for an unserviceable counterpart.

b. Column (2).

Functional Group.

This column

contains a brief description of the components of each

I-Repair. The application of maintenance services (inspect.

numerical group.

test. service. adjust. align. calibrate. or replace) or other

maintenance actions

welding.

grinding.

riveting.

c. Column (3). Maintenance Functions. This column

straightening, facing. remachining or resurfacing) to restore

lists the various maintenance functions IA through K). The

serviceability to an item by correcting specific damage.

lowest maintenance level authorized to perform these

fault. malfunction. or failure in a part. subassembly.

functions is indicated by a symbol in the appropriate column.

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

The symbol designations for the various maintenance levels

are as follows:

J-Overhaul. That maintenance effort (service / action )

necessary to restore an item to a completely serviceable/

C-Operator or crew

operational condition as prescribed by

maintenance

O-Organization maintenance.

standards (i.e., DMWR) in appropriate technical publication.

F-Direct support maintenance.

Overhaul is normally the highest degree of maintenance

H-General support maintenance.

performed by the Army. Overhaul does not normally return

D-Depot maintenance.

an item to like new condition.

The maintenance functions are defined as follows:

A-Inspect.

To determine serviceability of an item by

comparing its physical, mechanical. and

electrical

characteristics

with

established standards through

examination.

B-Test. To verify serviceability and detect incipient failure by

measuring the mechanical or electrical characteristics of an

item and comparing those characteristics with prescribed

standards.

B-1