TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 15 of 1275
TM 9-2350-311-20-1
CHAPTER 1
INTRODUCTION
GENERAL
This chapter provides information to familiarize the mechanic with the M109A2/M109A3/M109A4/M109A5 Medium,
Self-Propelled Howitzers’ hull, powerplant, drive controls, tracks, suspension, and other hull-related components. The
familiarization is provided through a physical description of major components that the mechanic at unit level is required
to inspect, service, replace, or repair.
CONTEN S
T
Section I
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
1-12
Section II
1-13
1-14
1-15
1-16
Section Ill
1-17
PAGE
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-5
SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-5
MAINTENANCE FORMS, RECORDS, AND REPORTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 1-5
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE . . . . . . . . . . . . . . . . . . . . . . . .
..1-5
PREPARATION FOR SHIPMENT AND STORAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-6
QUALITY ASSURANCE (QA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...1-6
OFFICIAL NOMENCLATURE, NAMES, AND DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-6
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIRs) . . . . . . . . . . . . . . . . . . . . 1-7
WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-7
SAFETY, CARE, AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
......
1-7
CORROSION PREVENTION AND CONTROL (CPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-8
NUCLEAR HARDNESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-9
SECURITY MEASURES FOR ELECTRONIC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-9
EQUIPMENT DESCRIPTION AND DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-9
CAPABILITIES AND FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-9
LOCATION OF MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-10
DIFFERENCES BETWEEN MODELS.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-14
EQUIPMENT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-15
PRINCIPLES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-17
EQUIPMENT OPERATION AND DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..1-18
1-1
Back to Top
