APPENDIX C. MAINTENANCE ALLOCATION - TM-11-5820-509-120040

TM 11-5820 509-12

APPENDIX C

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

h. Replace. The act of substituting a serviceable like-

C-1. General

type part, subassembly, module (component or assembly)

This appendix provides a summary of the maintenance

in a manner to allow the proper functioning of an

operations covered in the equipment literature.

equipment/system.

authorizes categories of maintenance for specific

i. Repair. The application of maintenance services

maintenance functions on repairable items and

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

components and the tools and equipment required to

other maintenance actions (welding, grinding, riveting,

perform each function. This appendix may be used as an

straightening, facing, remachining, or resurfacing) to

aid in planning maintenance operations.

restore serviceability to an item by correcting specific

C-2. Maintenance Functions

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

Maintenance functions will be limited to and defined as

subassembly, module/component/assembly, end item or

follows:

system.

a. Inspect. To determine the serviceability of an item

Overhaul.

That maintenance effort (service

by comparing its physical, mechanical, and/or electrical

necessary to restore an item to a completely

characteristics with established standards through

serviceable/operational condition as prescribed by

examination.

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

b. Test. To verify serviceability and to detect incipient

technical manuals. Overhaul is normally the highest

failure of measuring the mechanical or electrical

degree of maintenance performed by the Army. Overhaul

characteristics of an item and comparing those

does not normally return an item to like-new condition.

characteristics with prescribed standards.

k. Rebuild. Consists of those services/actions necessary

c. Service. Operations required periodically to keep an

for the restoration of unserviceable equipment to a like-

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

new condition in accordance with original manufacturing

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

standards. Rebuild is the highest degree of materiel

fluids or compressed air supplies.

maintenance applied to Army equipment. The rebuild

d. Adjust. Maintain within prescribed limits by

operation includes the act of returning to zero those age

bringing into proper or exact position, or by setting the

measurements {hours, miles, etc.) considered in

operating characteristics to the specified parameters.

classifying Army equipment/components.

e. Align. To adjust specified variable elements of an

1. Symbols. The uppercase letter placed in the

item to about optimum or desired performance.

appropriate column indicates the lowest level at which

f. Calibrate. To determine and cause corrections to be

that particular maintenance function is to be performed.

made or to be adjusted on instruments or test measuring

C-3. Explanation of Format

and diagnostic equipment used to precision measurement.

a. Group Number. Column l lists group numbers, the

Consists of the comparison of two instruments, one of

purpose of which is to match components, assemblies,

which is a certified standard of known accuracy, to detect

subassemblies and modules with the next higher

and adjust any discrepancy in the accuracy of the

assembly.

instrument being compared.

b. Functional Group. Column 2 lists the next higher

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

assembly group and the item names of components,

position an item, part, module (component or assembly}

assemblies, subassemblies and modules within the group

in a manner to allow the proper functioning of the

for which maintenance is authorized.

equipment/system.

c. Maintenance Functions. Column 3 lists the twelve

maintenance functions defined in C-2

C-1