450H - BULLDOZER 2163 HYDRAULIC LINES AND HOSES Parts group 2163 HYDRAULIC LINES AND HOSES 2163 HYDRAULIC LINES AND HOSES . HYDRAULIC SUCTION HOSE (HYDRAULIC RESERVOIR TO HYDRAULIC PUMP) HYDRAULIC PRESSURE HOSE (HYDRAULIC PUMP TO CONTROL VALVE) HYDRAULIC FILTER HOSE HYDRAULIC SUCTION HOSE (DRIVE THRU PUMP)(RESERVOIR TO PUMP) ENVIRONMENTAL DRAIN