Appendix B. Maintenance Allocation Chart

TM 5-4920-201-14

APPENDIX

MAINTENANCE

ALLOCATION

CHART

B-1. PURPOSE.

(9) Repair. To restore an item to ser-

viceable condition. This includes, but is not limited

The purpose of the maintenance allocation

to, inspection, cleaning, preserving, adjusting,

chart is to provide all activities with maintenance

replacing, welding, riveting, and strengthening.

functions to be performed at each level of main-

(10) Overhaul. To restore an item to a

tenance.

completely serviceable condition as prescribed by

B-2. DEFINITIONS.

maintenance serviceability standards prepared and

a. Column 1, Group Number. Column 1 lists

published for the specific item to be overhauled.

group numbers, the purpose of which is to identify

(11) Rebuild. To restore an item to a

components, assemblies, subassemblies, and

standard as nearly as possible to original or new

modules with the next higher assembly.

condition in appearance, performance, and life

b. Column 2, Functional Group. Column 2

expectancy. This is accomplished through complete

lists the noun names of components, assemblies,

disassembly of the item, inspection of all parts or

subassemblies, and modules on which maintenance

components, repair or replacement of worn or

is authorized.

unserviceable elements (items) using original

Column 3, Maintenance Functions.

manufacturing tolerances and specifications, and

Maintenance functions will be limited to and

subsequent reassembly of the item.

defined as follows:

(12) Symbols. The symbol O, F, H or D,

(1) Inspect: To determine serviceablity

placed in the appropriate column indicates the level

of an item by comparing its physical, mechanical,

responsible for performing that particular main-

and electrical characteristics with established

tenance function. The symbol "%%" which ap-

standards.

plies to organizational maintenance indicates the

(2) Test. To verify serviceablity and to

particular maintenance function may be performed

detect electrical or mechanical failure by use of test

provided it is specifically authorized by the direct

equipment.

support maintenance officer. Use of the symbol will

(3) Service. To clean, to preserve, to

apply only to replacement of major assemblies and

charge, and to add fuel, lubricants, cooling agents,

time-consuming operations which are within the

and air. If it is desired that elements, such as

capabilities of organization, but over which control

painting and lubricating, be defined separately,

by the commodity commands is considered

they may be so listed.

essential. In no case will the direct support

maintenance officer require the accomplishment of

(4) Adjust. To rectify to the extent

a "%%" maintenance function by an organization

necessary to bring into proper operating range.

or unit, and in no case will a "%%" function

(5) Align. To adjust specified variable

authorize stockage of parts at organizational level.

elements of an item to bring to optimum per-

d. Column 4, Tools and Equipment. This

formance.

column will be used to specify, by code, those tools

(6) Calibrate. To determine the

and test equipment required to perform the

corrections to be made in the readings of in-

designated function.

struments or test equipment used in precise

e. Column 5, Remarks. Self-explanatory.

measurement. Consists of the comparison of two

instruments, one of which is a certified standard of

B-3. GENERAL.

known accuracy, to detect and adjust any

a. A maintenance function assigned to a

discrepancy in the accuracy of the instrument being

maintenance level, which for any reason is beyond

compared with the certified standard.

its capability, becomes the responsibility of the next

(7) Install. To set up for use in an

higher maintenance level.

operational environment such as an emplacement,

b. The authority to perform a maintenance

site, or vehicle.

function does not constitute authority to requisition

(8) Replace. To replace unserviceable

or otherwise secure necessary repair parts as

items with serviceable assemblies, subassemblies,

specified in current supply directives.

or parts.

B-1