Chapter 4. TROUBLESHOOTING

TM 9-2350-222-20-1-2

CHAPTER 4

TROUBLESHOOTING

GENERAL

Troubleshooting is the step-by-step process of identifying, locating, isolating, and repairing equipment

malfunctions or breakdowns. This section contains instructions and information which will assist the

technician in troubleshooting the M728 hull. The Detailed Troubleshooting Procedures cover the most

frequent failures and a wide variety of other failures that can be identified and dealt with effectively,

using the information in this section.

Page

CONTENTS

USER GUIDE

4-2

4-20

TROUBLESHOOTING SYSTEM INDEX

4-21

TROUBLESHOOTING SUBJECT INDEX

4-25

VEHICLE OPERATION SYMPTOM AND RESOURCE TABLE

INDICATOR SYMPTOM AND RESOURCE TABLE

4-28

4-30

SUPPORT SYSTEM SYMPTOM AND RESOURCE TABLE

4-32

USE OF AN/URM-105 OR ME-77 C/U MULTIMETER

USE OF SIMPLIFIED TEST EQUIPMENT/

INTERNAL COMBUSTION ENGINE (STE/ICE) SET

4-50

VTM GENERAL SET-UP CONFIDENCE AND IDENTIFICATION TEST NO. 66/60

4-59

CI POWER TEST NO. 13

4-64

COMPRESSION UNBALANCE TEST NO. 14

4-69

PRESSURE 0-1000 PSIG TEST NO. 50

4-71

CHARGING CIRCUIT AND BATTERY VOLTAGE TEST NO. 67

4-74

STARTER CURRENT FIRST PEAK TEST NO. 72

4-77

STARTER CIRCUIT RESISTANCE TEST NO. 74

4-80

BATTERY CONDITION TEST NO. 77/79

4-83

DC VOLTAGE TEST NO. 89

4-90

RESISTANCE AND CONTINUITY TEST NO. 91/92

4-92

AC VOLTAGE TEST NO. 93

4-95

HARNESS CIRCUIT DIAGRAMS

4-97

DETAILED TROUBLESHOOTING PROCEDURES

4-131

SYMPTOMS 1 THRU 87

Change 4

4-1