Fayat Group BOMAG BC 672 RB-4 Service Manual page 5

4.7.1 Sequence of end position damping.......................................................................................... 205
4.8 Travel system............................................................................................................................ 209
4.9 Training of electric system....................................................................................................... 210
4.10 Inspection and maintenance work......................................................................................... 311
4.10.1 Maintenance Table................................................................................................................. 311
4.10.2 Every 500 operating hours..................................................................................................... 311
4.10.3 As required............................................................................................................................. 312
5 Hydraulic system.............................................................................................................................. 315
5.1 Basic principles......................................................................................................................... 316
5.1.1 Open and closed hydraulic circuit............................................................................................ 316
5.1.2 Swash plate principle, pump.................................................................................................... 318
5.1.3 Swash plate principle, motor.................................................................................................... 319
5.1.4 External gear pumps................................................................................................................ 321
5.2 Overview of hydraulics............................................................................................................. 323
5.3 Description of hydraulic components..................................................................................... 325
5.3.1 Travel pump, A4VG85 DA........................................................................................................ 325
5.3.2 Travel pump, A4VG85 HT........................................................................................................ 332
5.3.3 Fan pump, A4VG56 EF-EP...................................................................................................... 338
5.3.4 Steering and working pump, A10VO/VSO............................................................................... 343
5.3.5 Travel motor, A6VM215 EP...................................................................................................... 348
5.3.6 Fan motor................................................................................................................................. 352
5.3.7 Control valve block for steering and dozer blade..................................................................... 354
5.4 Description of hydraulic circuits............................................................................................. 365
5.4.1 Charge circuit........................................................................................................................... 366
5.4.2 Travel system........................................................................................................................... 367
5.4.3 Cooling system......................................................................................................................... 379
5.4.4 Working hydraulics................................................................................................................... 384
5.5 Inspection and maintenance work.......................................................................................... 398
5.5.1 Maintenance Table................................................................................................................... 398
5.5.2 Checks prior to start up............................................................................................................ 398
5.5.3 Every 500 operating hours....................................................................................................... 399
5.5.4 Every 1000 operating hours..................................................................................................... 401
5.5.5 Every 2000 operating hours..................................................................................................... 405
6 Machine assemblies.......................................................................................................................... 411
6.1 Diesel engine............................................................................................................................. 413
6.1.1 Overview of diesel engine........................................................................................................ 413
6.1.2 Coolant circuit.......................................................................................................................... 416
6.1.3 Fuel supply............................................................................................................................... 419
6.1.4 Lubrication oil circuit................................................................................................................. 424
6.1.5 Cylinder crankcase ventilation................................................................................................. 426
6.1.6 Exhaust gas recirculation (EGR).............................................................................................. 427
6.1.7 Exhaust gas aftertreatment (SCR)........................................................................................... 429
6.1.8 Engine electrics........................................................................................................................ 444
6.1.9 Inspection and maintenance work............................................................................................ 468
6.2 Oscillating articulated joint...................................................................................................... 488
6.2.1 Removing and installing live ring, oscillating articulated joint................................................... 488
BC 672 RB-4 / BC 772 RB-4 / BC 772 RS-4 / BC 772 EB-4
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