APPENDIX B MAINTENANCE ALLOCATION - TM-11-5805-451-150099

TM 11-5805-451-15

APPENDIX B

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

to be made in the readings of instruments or test

B-1. General

equipment used in precise measurement. Consists

This appendix provides a summary of the mainte-

of the comparison of two instruments, one of

nance operations covered in the equipment litera-

which is a certified standard of known accuracy,

ture for Philco Express Orderwire Multidirection

to detect and adjust any discrepancy in the ac-

Unit. It authorizes categories of maintenance for

curacy of the instrument being compared with

specific maintenance functions on repairable

the certified standard.

items and components and the tools and equip-

ment required to perform each function. This ap-

g. INSTALL. TO set up for use in an operation-

pendix may be used as an aid in planning main-

al environment such as an encampment, site, or

tenance operations.

vehicle.

h. REPLACE. To replace unserviceable items

with serviceable like items.

B-2. Maintenance Functions

Maintenance functions will be limited to and de

i. REPAIR. To restore an item to serviceable

fined as follows :

condition through correction of a specific failure

or unserviceable condition. This function includes,

a. INSPECT. To determine serviceability of an

but is not limited to welding, grinding, riveting,

item by comparing its physical, mechanical, and

straightening, and replacement of parts other

electrical characteristics with established stand-

than the trial and error replacement of running

ards.

spare type items such as fuses, lamps, or electron

tubes.

b. TEST. To verify serviceability and to detect

incipient electrical or mechanical failure by use

j. OVERHAUL. Normally, the highest degree

of special equipment such as gages, meters, etc.

of maintenance performed by the Army in order

This is accomplished with external test equipment

to minimize time work in process is consistent

and does not include operation of the equipment

with quality and economy of operation. It consists

and operator type tests using internal meters or

of that maintenance necessary to restore an item

indicating devices.

to completely serviceable condition as prescribed

by maintenance standards in technical publica-

c. SERVICE. To clean, to preserve, to charge,

tions for each item of equipment. Overhaul nor-

and to add fuel, lubricants, cooling agents, and

mally does not return an item to like new, zero

air. If it is desired that elements, such as paint-

mileage, or zero hour condition.

ing and lubricating, be defined separately, they

may be so listed.

k. REBUILD. The highest degree of materiel

maintenance. It consists of restoring equipment

ct. ADJUST. To rectify to the extent necessary

to bring into proper operating range.

as nearly as possible to new condition in accord-

ance with original manufacturing standards. Re-

e. ALIGN. To adjust two or more components

build is performed only when required by opera-

or assemblies of an electrical or mechanical sys-

tional considerations or other paramount factors

tem so that their functions are properly synchro-

and then only at the depot maintenance category.

nized. This does not include setting the frequency

Rebuild reduces to zero the hours of miles the

control knob of radio receivers or transmitters

equipment, or component thereof, has been in use.

to the desired frequency.

f. CALIBRATE. To determine the corrections

i. SYMBOLS. The uppercase letter placed in

B-1