6.12.8 Coolant filter – Replacement 119
6.13 Low-Temperature Circuit 120
6.13.1 Intercooler – Vent and drain points 120
6.13.2 Charge-air coolant – Level check 121
6.13.3 Charge-air coolant – Change 122
6.13.4 Charge-air coolant – Filling 123
6.13.5 Charge-air coolant – Draining 125
6.13.6 Charge-air coolant pump – Relief bore check 126
6.14 Belt Drive 127
6.14.1 Drive belt – Condition check 127
6.14.2 Drive belt – Tension check 128
6.14.3 Drive belt – Tension adjustment 130
6.14.4 Drive belt – Replacement 132
6.15 Battery-Charging Generator 133
6.15.1 Battery-charging generator drive – Drive belt
replacement 133
6.16 Engine Governor 134
6.16.1 Engine governor – Overview 134
6.16.2 Engine governor – Removal 135
6.16.3 Engine governor – Installation 136
6.16.4 Engine governor plug connections – Check 137
6.17 Wiring (General) for Engine/Gearbox/Unit 138
6.17.1 Engine cabling – Check 138
6.17.2 Lambda, NOx and humidity sensors –
Overview 139
6.17.3 Lambda sensor – Replacement 140
6.17.4 NOx sensor – Replacement 142
6.17.5 Humidity sensor – Replacement 144
6.18 Accessories for (Electronic) Engine
Governor / Control System 146
6.18.1 Resetting CDC parameter and entering IIG
with DiaSys® 146
6.18.2 Engine governor and connector – Cleaning 147
6.18.3 Engine governor plug connections – Check 148
7 Appendix A
7.1 Abbreviations 149
7.2 MTU contact persons/service partners 151
8 Appendix B
8.1 Special Tools 152
8.2 Index 161
4 | Table of Contents | MS150094/02E 2015-05
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