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 30 of 828
TM 9–2350–311–20–2
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HOW TO USE THIS MANUAL – CONTINUED
Indexing
Five major indexing procedures are used in this manual to help mechanics locate information rapidly.
1.
Cover Index: Lists sections of text and page number. Includes index mark which lines up with index marks on the actual
page of reference.
Example: Troubleshooting
3–1
2.
Table of Contents.
3.
Chapter and section indexes listing data/information covered within the chapter and section.
4.
Quick Guide to Troubleshooting identifies system malfunction and provides paragraph references for specific
troubleshooting procedures or maintenance action.
5.
Index: Alphabetical listing of information.
Maintenance Text and Illustrations (Chapters 4 through 19)
1.
Maintenance procedures are to be performed in the sequence shown in the text and illustrations. Step 1 must be per-
formed before Step 2. Procedure A must be performed before Procedure B, and so on.
2.
Equipment illustrations use numbers to identify parts of the system/components.
Example: Remove two cap screws (7) and two lockwashers (8).
3.
This manual is written to include all parts authorized to be used or repaired at the unit level using Repair Parts and
Special Tools List (RPSTL) (TM 9–2350–311–24P–2) as a guide. All parts with SMR code maintenance levels “O” are
mentioned in the order of functional group codes whenever possible, to enable location in the RPSTL.
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