340D - SKIDDER, LOG 21 MAIN HYDRAULIC SYSTEM 21 Parts group 21 MAIN HYDRAULIC SYSTEM 21 HYDRAULIC SYSTEM 2160 . REPLACEMENT HYDRAULIC PUMP ASSEMBLY [02B06] HYDRAULIC PUMP - MODEL GD1-GH1 50 CM3 (3 IN.3) [02B07] HYDRAULIC PUMP STROKE CONTROL VALVE 50 CM3 (3 IN.3) [02B09] HYDRAULIC PUMP AND STROKE CONTROL VALVE OVERHAUL KIT 50 CM3 (3 IN.3) [02B11] HYDRAULIC PUMP DRIVE [02B13] OIL COOLER [02B14] OIL COOLER LINES AND HOSES [02B15] HYDRAULIC PUMP PRESSURE LINES [02B17] PRESSURE CONTROL VALVE [02B18] HYDRAULIC SYSTEM RETURN AND CHARGE LINES [02B19] PRESSURE CONTROL VALVE AND RELIEF VALVE LINES AND HOSES [02B21] RELIEF VALVE [02B23] REPLACEMENT RELIEF VALVE [02B24] Select group 21 MAIN HYDRAULIC SYSTEM 21 John Deere: HYDRAULIC SYSTEM 2160