OEM New Excavator Crankshaft Diesel Engine C4.2 C4.4 315D E312D Alloy Forged Steel 2964710 296-4710 Construction Machinery Parts Compatible with 312 M313D M315D 318 Excavator Crank Shaft Construction Machinery Parts. This high-quality crankshaft is designed for optimal performance in heavy-duty construction equipment. Crankshaft Overhaul Kit Components Main and Connecting Rod Bearings: Provide low-friction, wear-resistant surfaces between crankshaft journals and engine