CHAPTER 1. INTRODUCTION -714530011

CORROSION PREVENTION AND CONTROL (CPC) -714530012

TM-9-1240-401-34-P Telescope Mount: M146 Elbow Telescope: M118A2 Elbow Telescope: M118A3 Telescope Mount: M145 Telescope Mount: M145A1 Manual
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TM 9-1240-401-34&P

CHAPTER 1

INTRODUCTION

CHAPTER INDEX

Page

1-1

GENERAL INFORMATION.......................................................................................

Section I.

1-1.

SCOPE ..........................................................................................................................

1-1

MAINTENANCE FORMS, RECORDS, AND REPORTS .............................................................

1-2.

OFFICIAL NOMENCLATURE, NAMES, AND DESIGNATIONS .................................................

1-1

1-3.

REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR's) ............................

1-2

1-4.

1-2

CORROSION PREVENTION AND CONTROL (CPC) ............................................................

1-4.1

EQUIPMENT DESCRIPTION AND DATA ...........................................................................

1-2

Section II.

1-5.

EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

1-18

LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.. ................................................

1-6.

DATA PLATES ................................................................................................................

1-7.

1-19

1-21

DIFFERENCES BETWEEN MODELS .....................................................................................

1-8.

EQUIPMENT DATA ............................................................................................................

1-22

1-9.

PRINCIPLES OF OPERATION .........................................................................................

Section Ill.

1-24

Section I. General Information

1-1. SCOPE

Type of manual: Direct and general support maintenance.

Model numbers and equipment name: M146 telescope mount, M118A2/M118A3 elbow telescope, M145/M145A1 telescope

mount, M117/M117A2 panoramic telescope, M15 fire control quadrant, M42 periscope, and linkage assembly.

Purpose of equipment: Used on the M109A2/M109A3/M109A4/M109A5/M109A6 howitzer to provide sighting and targeting

capabilities.

1-2. MAINTENANCE FORMS, RECORDS, AND REPORTS

Department of the Army forms and procedures used for equipment maintenance will be prescribed by DA PAM 738-750, The

Army Maintenance Management System (TAMMS).

1-3. OFFICIAL NOMENCLATURE, NAMES, AND DESIGNATIONS

COMMON NAME

OFFICIAL NOMENCLATURE

Howitzer

Howitzer, medium, self-propelled

155mm, M109A2/M109A3/M109A4/M109A5/M109A6

M42 periscope

M42 tank periscope

Preformed packing

O-ring

M15 quadrant

Quadrant, fire control, M15

Cross-level mechanism

Wormshaft housing

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