Appendix B. MAINTENANCE ALLOCATION CHART

TM 5-4110-217-14

APPENDIX B.

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

B-1. General

(4) Adjust. To maintain within prescribed

a. This section provides a general explanation of

limits, by bringing into proper or exact position, or by

all maintenance and repair functions authorized at

setting the operating characteristics to specified

various maintenance levels.

parameters.

b. Section II designates overall responsibility for

(5) Align. To adjust specified

variable

the performance of maintenance functions on the

elements of an item to bring about optimum or desired

identified end item or component and the work

performance.

measurement time required to perform the functions by

(6) Calibrate.

To determine and cause

the designated maintenance level. The implementation

corrections to be made or to be adjusted on instruments

of the maintenance functions upon the end item or

or test measuring and diagnostic equipments used in

component will be consistent with the assigned

precision measurement. Consists of comparison of two

maintenance functions.

instruments, one of which is a certified standard of

c. Section III lists the tools and test equipment

known accuracy, to detect and adjust any discrepancy in

required for each maintenance function as referenced

the accuracy of the instrument being compared.

from Section II.

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

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

B-2.

Explanation of Columns in Section II

assembly) in a manner to allow the proper functioning of

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

an equipment or system.

group numbers to identify related components,

(8) Replace.

The act of substituting a

assemblies, sub-assemblies, and modules with their next

serviceable like type part, sub-assembly, or module

higher assembly. The applicable groups are listed in the

(component or assembly) for an unserviceable

MAC in disassembly sequence beginning with the first

counterpart.

group removed.

(9) Repair. The application of maintenance

b. Column (2), Component/Assembly.

This

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

column contains the noun names of components,

replace) or other maintenance actions (welding, grinding,

assemblies, sub-assemblies and modules for which

riveting,

straightening,

facing,

remachining

maintenance is authorized.

resurfacing) to restore serviceability to an item by

c. Column (3), Maintenance Functions. This

correcting specific damage, fault, malfunction, or failure

column lists the functions to be performed on the item

in a part, sub-assembly, module (component or

listed In Column 2.

assembly), end item, or system.

The maintenance functions are defined as follows:

(10) Overhaul.

That maintenance effort

(1) Inspect. To determine serviceability of an

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

item by comparing its physical, mechanical, and/or

completely serviceable/operational

condition

electrical characteristics with established standards

as prescribed by maintenance standards (i.e.,

through examinations.

DMWR) in appropriate technical publications. Overhaul

(2) Test. To verify serviceability and detect

is normally the highest degree of maintenance per-

incipient failure by measuring the mechanical or

formed by the Army. Overhaul does not normally return

electrical characteristics of an item and comparing those

an item to like new condition.

characteristics with prescribed standards.

(11) Rebuild.

Consists

those

(3) Service. Operations required periodically

services/actions necessary for the restoration of

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

unserviceable equipment to a like new condition in

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

accordance with original manufacturing standards.

to replenish fuel, lubricants, hydraulic fluids, or

Rebuild is the highest degree of materiel maintenance

compressed air supplies.

applied to

B-1