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 26 of 828
TM 9--2350--311--20--2
Change 4
i
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHINGTON, D.C., 24 December 1993
TECHNICAL MANUAL
No. 9--2350--311--20--2
UNIT MAINTENANCE MANUAL
FOR
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL,
ELEVATING AND TRAVERSING SYSTEMS, AND ASSOCIATED COMPONENTS
HOWITZER, MEDIUM, SELF-PROPELLED
155MM
M109A2 (2350--01--031--0586) (EIC: 3EZ)
M109A3 (2350--01--031--8851) (EIC: 3E2)
M109A4 (2350--01--277--5770) (EIC: 3E8)
M109A5 (2350--01--281--1719) (EIC: 3E7)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this publication. If you find any mistakes or if you know of a way to improve the procedures,
please let us know. Submit your DA Form 2028 (Recommended Changes to Equipment Technical Publications),
through the Internet, on the Army Electronic Product Support (AEPS) website. The Internet address is
https://aeps.ria.army.mil. The DA Form 2028 is located under the Public Applications section in the AEPS Public
Home Page. Fill out the form and click on SUBMIT. Using this form on the AEPS will enable us to respond quicker
to your comments and better manage the DA Form 2028 program. You may also mail, fax or E-mail your letter or
DA Form 2028 direct to: TACOM Life Cycle Management Command ATTN: AMSTA-LC-LMPP/TECH PUBS, 1
Rock Island Arsenal, Rock Island, IL 61299-7630. The email address is ROCK-TACOM-TECH-PUBS@conus.ar-
my.mil. The fax number is DSN 793-0726 or Commercial (309) 782-0726.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
TABLE OF CONTENTS
Page
HOW TO USE THIS MANUAL
iv
........................................................
CHAPTER 1
INTRODUCTION
1--1
.................................................................
Section I.
General Information
1--3
...............................................................
Section II.
Equipment Description and Data
1--8
....................................................
Section III.
Principles of Operation
1--23
............................................................
CHAPTER 2
GENERAL CAB MAINTENANCE
2--1
...................................................
Section I.
Repair Parts, Tools, Special Tools, Test, Measurement, and Diagnostic Equipment
(TMDE), and Support Equipment
2--2
....................................................
Section II.
Service Upon Receipt
2--3
.............................................................
Section III.
Preventive Maintenance Checks and Services (PMCS) and Lubrication Instructions
and Mandatory Replacement Parts
2--18
.................................................
Section IV.
General Maintenance Procedures
2--33
..................................................
Section V.
Preparation for Storage or Shipment
2--40
................................................
*This manual supersedes the following manual: TM 9--2350--311--20--2, June 1986, and all changes.
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