
4.1.1 Measuring method..................................................................................................................... 99
4.1.2 Understanding circuit diagrams................................................................................................ 104
4.1.3 Telemecanique switch.............................................................................................................. 115
4.1.4 Deutsch plug, series DT and DTM........................................................................................... 117
4.1.5 Magnetic coil plug.................................................................................................................... 121
4.1.6 Clip-on technology................................................................................................................... 123
4.2 Overview of electric system..................................................................................................... 127
4.2.1 Operator’s stand...................................................................................................................... 129
4.2.2 Wiring....................................................................................................................................... 131
4.2.3 CAN BUS overview.................................................................................................................. 137
4.2.4 Table of fuels and lubricants..................................................................................................... 138
4.3 Starting the engine with jump leads........................................................................................ 148
4.4 Installation locations of control units..................................................................................... 149
4.5 Fuse assignment....................................................................................................................... 154
4.5.1 Notes on safety........................................................................................................................ 154
4.5.2 Central electrics....................................................................................................................... 154
4.5.3 Main fuses................................................................................................................................ 155
4.5.4 Control console cabin............................................................................................................... 156
4.6 Description of electrical components..................................................................................... 157
4.6.1 Control console cabin .............................................................................................................. 163
4.6.2 Control unit for air conditioning, A72........................................................................................ 165
4.7 Training of electric system....................................................................................................... 168
4.8 Inspection and maintenance work.......................................................................................... 226
4.8.1 Maintenance Table................................................................................................................... 226
4.8.2 Every 500 operating hours....................................................................................................... 226
4.8.3 As required............................................................................................................................... 227
5 Hydraulic system.............................................................................................................................. 229
5.1 Basic principles......................................................................................................................... 231
5.1.1 Open and closed hydraulic circuit............................................................................................ 231
5.1.2 Swash plate principle, pump.................................................................................................... 233
5.1.3 Swash plate principle, motor.................................................................................................... 234
5.1.4 External gear pumps................................................................................................................ 236
5.2 Overview of hydraulics............................................................................................................. 238
5.3 Description of hydraulic components..................................................................................... 243
5.3.1 Travel pump, A4VG71 DA........................................................................................................ 243
5.3.2 Travel pump, A4VG71 DG....................................................................................................... 250
5.3.3 Fan pump, A4VG56 EF-EP...................................................................................................... 256
5.3.4 Steering and working pump, A10VO/VSO............................................................................... 261
5.3.5 Travel motor, A6VM HA2T....................................................................................................... 266
5.3.6 Fan motor................................................................................................................................. 270
5.4 Description of hydraulic circuits............................................................................................. 272
5.4.1 Charge circuit, engine hood, brake and travel speed range selection..................................... 273
5.4.2 Travel system........................................................................................................................... 280
5.4.3 Cooling system......................................................................................................................... 284
5.4.4 Working hydraulics................................................................................................................... 290
5.5 Tests and adjustments............................................................................................................. 294
Table of contents
BC 573 RB-3
4
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