590D - EXCAVATOR 2160 Vehicle Hydraulics Parts group 2160 Vehicle Hydraulics 2160 Vehicle Hydraulics . MAIN HYDRAULIC PUMP AND DRIVE Main Hydraulic Pump MAIN PUMP CONTROL SECTION MAIN PUMP CONTROL SECTION COVER MAIN PUMP VALVE COVER MAIN PUMP CONTROL SECTION PARTS MAIN PUMP ROTARY GROUP MAIN PUMP ROTARY GROUP PILOT GEAR PUMP RESERVOIR Hydraulic Filter Restriction Indicator DIFFERENTIAL SWITCH