TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 32 of 828
TM 9–2350–311–20–2
1–1
CHAPTER 1
INTRODUCTION
GENERAL
This chapter provides a general introduction to the purposes, safe use, and capabilities of the howitzer. Section I describes
procedures for destroying equipment to prevent enemy use, references to other technical manuals, and forms to recom-
mend improvements. Sections II and Ill familiarize the mechanic with equipment data and operating principles of the howit-
zer’s systems.
CONTENTS
Page
Section I.
GENERAL INFORMATION
1–1
SCOPE
1–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2
MAINTENANCE FORMS, RECORDS, AND REPORTS
1–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
1–3
. . . . . . . . . . . . . . . . . . . . . . . . .
1–4
PREPARATION FOR STORAGE OR SHIPMENT
1–4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–5
QUALITY ASSURANCE (QA)
1–4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–6
OFFICIAL NOMENCLATURE, NAMES, AND DESIGNATIONS
1–4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–7
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)
1–6
. . . . . . . . . . . . . . . . . . .
1–8
WARRANTY INFORMATION
1–6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–9
SAFETY, CARE, AND HANDLING
1–6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–10
CORROSION PREVENTION AND CONTROL (CPC)
1–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–11
NUCLEAR HARDNESS
1–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–12
SECURITY MEASURES FOR ELECTRONIC DATA
1–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section II.
EQUIPMENT DESCRIPTION AND DATA
1–13
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
1–8
. . . . . . . . . . . . . . . . . . . . . . .
1–14
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
1–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–15
DIFFERENCES BETWEEN MODELS
1–17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–16
EQUIPMENT DATA
1–20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–17
EQUIPMENT CONFIGURATION
1–23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section III. PRINCIPLES OF OPERATION
1–18
EQUIPMENT OPERATION AND DESCRIPTION
1–23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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