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 110 of 828
TM 9–2350–311–20–2
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CHAPTER 3
TROUBLESHOOTING
GENERAL
This chapter contains troubleshooting, test, and repair information needed to correct equipment malfunctions of the M109
series howitzer at the unit maintenance level.
CONTENTS
Page
3–1
INITIAL SETUP
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QUICK GUIDE TO TROUBLESHOOTING
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TROUBLESHOOTING CHART
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INITIAL SETUP
3–1.1
Pre-Troubleshooting Procedures (TM 9–2350–311–10)
a.
Park the vehicle on level ground, place the transmission in NEUTRAL, and set the parking brake.
b.
Put the gun in TRAVEL LOCK position, set the cab in TRAVERSE LOCK position, and turn the engine off.
c.
Make sure all weapons have been unloaded, the bore is clear, and there is no primer.
d.
Walk around the vehicle and check to make sure there are no obstacles blocking the cab or vehicle.
3–1.2
Troubleshooting Task Initial Setup
Tools, materials/parts, and any conditions necessary to complete a troubleshooting task will be listed at the beginning of
each troubleshooting tree.
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QUICK GUIDE TO TROUBLESHOOTING
3–2.1
Contents of Quick Guide to Troubleshooting
The QUICK GUIDE TO TROUBLESHOOTING lists the items to check, possible symptoms with each item, and a reference
to a paragraph where a corrective action for the problem can be found.
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