THEORY OF OPERATION - TM-55-1925-292-14-P0015

TM 55-1925-292-14&P

THEORY OF OPERATION

This work package contains the theory of operation for the system. Theory of operation is provided to familiarize

the user with system operating principles. Once the operating principles are understood, the user is better

equipped to operate, troubleshoot, and maintain the system.

DESCRIPTION AND USE OF OPERATOR CONTROLS AND INDICATORS

This work package describes all of the operator controls and indicators contained in the system. Use of the

operator controls and indicators is also described. Turn to the figure that shows the desired control or indicator.

Note the key number corresponding to the control or indicator. Refer to the table below the illustration and find

the desired key number in the column on the far left hand side. The center column contains the name of the

control or indicator and the right hand column briefly describes the control or indicator's function.

OPERATOR INSTRUCTIONS

Work packages are included in this manual to describe operation under usual conditions as well as operation

under unusual conditions. Prior to performing any operating procedure, perform the initial setup by obtaining the

expendables, tools, materials and other items listed prior to starting the task. Always perform the listed steps in

the listed order.

TROUBLESHOOTING PROCEDURES

A troubleshooting index work package is contained in this manual to permit easy location of troubleshooting

procedures. Full directions for using the troubleshooting index and the accompanying troubleshooting proce-

dures are contained in the troubleshooting index work packages. The troubleshooting procedure work package(s)

immediately follow the troubleshooting index.

MAINTENANCE PROCEDURES

To locate a maintenance procedure, consult the table of contents or the alphabetical index. Each level of

maintenance (operator, unit, direct support, and general support) has a chapter dedicated to maintenance pro-

cedures for the appropriate level of maintenance. Each maintenance work package contains complete mainte-

nance procedures, starting with initial setup and continuing through follow on service as appropriate. Always

ensure that all of the initial setup is complete before beginning a maintenance procedure and always ensure that

all warnings, cautions, and notes are heeded.

MAINTENANCE ALLOCATION CHART

The MAC lists all of the authorized maintenance for the system assigns that maintenance to the appropriate

maintenance level (operator, unit, direct support, general support). Use of the MAC is explained fully in the

Maintenance Allocation Chart Introduction work package.

REPAIR PARTS AND SPECIAL TOOLS LIST (RPSTL)

The RPSTL lists all of the repair parts authorized for the system. Illustrations are provided to assist in locating

the desired repair parts. Full instructions for use of the RPSTL are contained in the Repair Parts and Special

Tools List Introduction work package. Always follow the directions contained in this work package when using

the RPSTL.

ALPHABETICAL INDEX

The Alphabetical Index, located in the back of this manual, contains an alphabetical list of all sections of this

manual. For example, Location and Description of Major Components is found in section L. The work package

sequence number is found on the right side of the title where the Location and Description of Major Components

is located. Turn to the work package indicated to find the description and location of each component.

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