Doosan D35S-5 Service Manual page 6

3. Engine Electrical System (D439E)
General ............................................................. 126
Specification ............................................... 126
Service Standards....................................... 128
Troubleshooting .......................................... 129
Charging System ............................................. 131
Description.................................................. 131
Adjustment.................................................. 132
Alternator ......................................................... 136
Components ............................................... 136
Disassembly ............................................... 137
Inspection ................................................... 139
Reassembly................................................ 140
Starting System ............................................... 141
Description.................................................. 141
Inspection ................................................... 142
Preheating System........................................... 144
Preheating Plug .......................................... 144
4. Fuel System
General ............................................................. 145
Specification ............................................... 145
Sealant ....................................................... 146
Tightening Torque....................................... 146
Troubleshooting .......................................... 146
Engine control............................................. 148
Engine Starting System............................... 148
Fuel Tank and Fuel Line.............................. 149
Troubleshooting Procedure ......................... 150
Troubleshooting Procedure ......................... 154
Engine Control System-Electronic.................. 167
Description.................................................. 167
Engine Control Unit (ECU)............................... 170
ECU Pin Connector..................................... 170
ECU Circuit Diagram........................................ 175
Removal ..................................................... 177
Inspection ................................................... 178
Intake Air Temperature Sensor ....................... 184
Inspection ................................................... 184
Intake Air Pressure Sensor ............................. 185
Inspection ................................................... 185
D439E Service Manual
Coolant Temperature Sensor...........................186
Inspection....................................................186
Installation ...................................................187
Camshaft Position Sensor ...............................188
Inspection....................................................188
Crankshaft Position Sensor .............................189
Inspection....................................................189
Rail Pressure Sensor........................................190
Inspection....................................................190
Supply Control Valve........................................191
Inspection....................................................191
Fuel Delivery System-Electronic......................192
Components ................................................192
Fuel Filter..........................................................193
Replacement ...............................................193
Inspection....................................................193
Assembly.....................................................193
Injector ..............................................................194
Components ................................................194
Cleaning ......................................................195
Removal ......................................................195
Replacement ...............................................196
Injector Replacement...................................197
ECU Replacement .......................................197
Installation ...................................................198
Common Rail Assembly...................................199
Removal ......................................................199
Installation ...................................................199
Injection Pump-Electronic................................200
Supply pump ...............................................200
4 Index