7.7.3 Fuel system – Venting 109
7.8 Fuel Filter 110
7.8.1 Fuel filter – Replacement 110
7.8.2 Fuel prefilter cleaning 112
7.8.3 Fuel prefilter – Differential pressure gauge
check and adjustment 113
7.8.4 Fuel prefilter – Draining 114
7.8.5 Fuel prefilter – Flushing 115
7.8.6 Fuel prefilter – Filter element replacement 117
7.9 Charge-Air Cooling General, Left-Hand
Side 119
7.9.1 Intercooler – Checking condensate drains for
coolant discharge and obstructions 119
7.10 Air Filter 120
7.10.1 Air filter – Replacement 120
7.11 Air Intake 121
7.11.1 Service indicator – Signal ring position check 121
7.12 Starting Equipment 122
7.12.1 Starter – Condition check 122
7.13 Lube Oil System, Lube Oil Circuit 123
7.13.1 Engine oil – Level check 123
7.13.2 Engine oil – Change 124
7.14 Oil Filtration / Cooling 125
7.14.1 Engine oil filter – Replacement 125
7.15 Coolant Circuit, General, High-
Temperature Circuit 127
7.15.1 Drain and venting points 127
7.15.2 Engine coolant – Level check 131
7.15.3 Engine coolant – Change 132
7.15.4 Engine coolant – Draining 133
7.15.5 Engine coolant – Filling 134
7.15.6 Coolant pump – Relief bore check 136
7.16 Low-Temperature Circuit 137
7.16.1 Charge-air coolant – Filling 137
7.16.2 Charge-air coolant – Draining 139
7.16.3 Charge-air coolant – Change 140
7.16.4 Charge-air coolant – Level check 141
7.17 Belt Drive 142
7.17.1 Drive belt – Condition check 142
7.18 Engine Mounting / Support 143
7.18.1 Engine mounts – Resilient elements check 143
7.19 Wiring (General) for Engine/Gearbox/Unit 144
7.19.1 Engine wiring – Check 144
7.20 Accessories for (Electronic) Engine
Governor / Control System 145
7.20.1 Engine governor and connectors – Cleaning 145
7.20.2 Engine monitoring unit and connectors –
Cleaning 146
7.20.3 Checking engine control unit plug connections 147
7.20.4 Engine monitoring unit – Plug connection
check 148
7.20.5 Engine control unit – Removal and installation 149
7.21 Emergency Instrumentation (Local
Operating Panel) 151
7.21.1 LOP – Visual inspection 151
7.21.2 LOP – Test procedures 154
8 Engine Governor Assignment and Circuitry
8.1 Engine Governor 156
8.1.1 Engine governor channel circuitry 156
8.1.2 MDEC governor assignment 165
8.2 Connector Assignment 167
8.2.1 Connector pin assignment 167
9 Appendix A
9.1 Abbreviations 176
9.2 MTU contact persons/service partners 179
10 Appendix B
10.1 Special Tools 180
10.2 Index 186
4 | Table of Contents | MS150025/02E 2012-10
DCL-ID: 0000009057 - 002
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