Operating instructions

6.11.2 Centrifugal oil filter – Cleaning and filter
sleeve replacement 72
6.12 Coolant Circuit, General, High-
Temperature Circuit 74
6.12.1 Drain and vent points 74
6.12.2 Engine coolant – Level check 79
6.12.3 Engine coolant – Change 80
6.12.4 Engine coolant – Draining 81
6.12.5 Engine coolant – Filling 82
6.12.6 Engine coolant pump – Relief bore check 84
6.12.7 Engine coolant – Sample extraction and
analysis 85
6.12.8 Coolant filter – Replacement 86
6.13 Low-Temperature Circuit 87
6.13.1 Intercooler – Vent and drain points 87
6.13.2 Charge-air coolant – Level check 88
6.13.3 Charge-air coolant – Change 89
6.13.4 Charge-air coolant – Filling 90
6.13.5 Charge-air coolant – Draining 92
6.13.6 Charge-air coolant pump – Relief bore check 93
6.14 Belt Drive 94
6.14.1 Drive belt – Condition check 94
6.14.2 Drive belt – Tension check 95
6.14.3 Drive belt – Tension adjustment 96
6.14.4 Drive belt – Replacement 97
6.15 Battery-Charging Generator 98
6.15.1 Battery-charging generator drive – Drive belt
replacement 98
6.16 Fuel Supply System 99
6.16.1 Water drain valve – Check 99
6.16.2 Differential pressure gauge – Check 100
6.16.3 Water level probe (3-in-1 rod electrode) –
Check 101
6.16.4 Pump capacity – Check 102
6.16.5 Coalescer filter element – Replacement 103
6.17 Engine Governor 105
6.17.1 Engine governor – Checking plug-in
connections 105
6.18 Wiring (General) for Engine/Gearbox/Unit 106
6.18.1 Engine wiring – Check 106
6.18.2 Lambda, NOx and humidity sensors –
Overview 107
6.18.3 Lambda sensor – Replacement 108
6.18.4 NOx sensor – Replacement 110
6.18.5 Humidity sensor – Replacement 112
6.19 Accessories for (Electronic) Engine
Governor / Control System 114
6.19.1 CDC parameters – Reset with DiaSys® 114
6.19.2 Engine governor and connectors – Cleaning 115
6.19.3 Engine governor – Checking plug-in
connections 116
7 Appendix A
7.1 List of abbreviations 117
7.2 MTU contact persons/service partners 120
8 Appendix B
8.1 Special Tools 121
8.2 Index 131
4 | Table of Contents | MS150095/01E 2012-08
DCL-ID: 0000009637 - 003