John Deere 4.27 OEM Crankshaft Remachined 20/10 Rods & Mains 4 Cyl Diesel AR26428, R40570, R26540 4.270 ESN up to 280000. Includes balancer driver gear (R63326, R26521). | Flange: Flat, 4 Bolt Holes, 2 Dowel Holes | Snout: 1 Bolt Hole, 2 Key-ways | Stroke: 4.750 in | Rod Journal: 2.9980-2.9990 in | Main Journal: 3.3715-3.3725 in | 5 Mains | With 2 Helical Gears With 2 Helical Gears