APPENDIX B MAINTENANCE ALLOCATION CHART

TM 10-3930-630-12

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

B-1

General

c. Service. Operations required periodically

a. This section provides a general explanation

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

of all maintenance and repair functions authorized at

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

various maintenance levels.

b. Section II designates overall responsibility

lubricants, hydraulic fluids, or compressed air supplies.

d. Adjust.

To maintain within prescribed

for the performance of maintenance functions on the

limits, by bringing into proper exact position, or by

identified end item or component and the work

setting the operating characteristics to specified

measurement time required to perform the functions by

parameters.

the designated maintenance level The implementation

e. Align.

To adjust specified variable

of the maintenance functions upon the end item or

component will be consistent with the assigned

elements of an item to bring about optimum or desired

maintenance functions.

performance.

c. Section III lists the special tools and test

Calibrate.

To determine and cause

equipment required for each maintenance function.

corrections to be made or to be adjusted on instruments

d. Section

contains

supplementary

or test measuring and diagnostic equipment used in

instructions or explanatory notes for a particular

precision measurement. Consists of comparison of two

maintenance function.

instruments, one of which is a certified standard of

known accuracy, to detect and adjust any discrepancy in

B.2.

Explanation of Columns In Section II

the accuracy of the instrument being compared.

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

a. Column 1. Group Number. Column 1 lists

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

a group of numbers to identify related components,

or assembly) in a manner to allow the proper functioning

assemblies, subassemblies, and modules with their next

of an equipment or system.

higher assembly. The applicable groups are listed in the

h. Replace.

The act of substituting a

MAC in disassembly sequence beginning with the first

serviceable like type part, sub-assembly, or module

group removed.

b. Column 2. Functional Group. This column

(component or assembly) for an unserviceable

counterpart.

contains a brief description of the components of each

Repair. The application of maintenance

numerical group.

c. Column 3. Maintenance Functions. This

services (inspect, test, service, adjust, align, calibrate,

or replace) or other maintenance actions (welding,

column lists the various maintenance functions (A

grinding, reveting, straightening, facing, remachining or

through K). The lowest maintenance level authorized to

resurfacing) to restore serviceability to an item by

perform these functions is indicated by a symbol in the

correcting specific damage, fault, malfunction, or failure

appropriate column. Work measurement time standards

in a part, subassembly, modure (component or

(the active repair time required to perform the

assembly), end item, or system.

maintenance function) are shown directly below the

Overhaul.

That maintenance effort

symbol identifying the maintenance level The symbol

(service/ action) necessary to restore an item to a

designations for the various maintenance levels are as

completely

serviceable/operational

condition

follows:

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

C - Operator or crew

appropriate technical publication. Overhaul is normally

0 -- Organization maintenance

the highest degree of maintenance performed by the

F - Direct support maintenance

Army. Overhaul does not normally return an item to like

H - General support maintenance

new condition.

D - Depot maintenance

k. Rebuild. Consists of those services/actions

The maintenance functions are defined as follows:

a. Inspect. To determine serviceability of an

necessary for the restoration of unserviceable

equipment to a like new condition in accordance with

item by comparing its physical, mechanical, and

original manufacturing standards. Rebuild is the highest

electrical characteristics with established standards

degree of material maintenance applied to Army

through examination.

b. Test. To verify serviceability and detect

equipment. The rebuild operation includes the act of

returning to zero those age measurements (hours/miles,

incipient failure by measuring the mechanical or

etc.)

considered

classifying

Army

electrical characteristics of an item and comparing those

equipment/components.

characteristics with prescribed standards.

B-1