16AS Coupling Assy 4393115 13Teeth For Hitachi EX50U John Deere Excavator 50ZTS. Application:For John Deere Excavator 50ZTS. Also For Hitachi Excavator EX50U. Please make sure it will fit your machine before purchasing it. Not 100% sure this is what you need, please find out your engine model. Series number and contact our Customer-service. If you have any questions or would like to know if the product is suitable. For your machine, please provide us with your engine nameplate and serial. Number and we will confirm this for you. Please check pictures for more details. Communication is the best way to solve the problem. If you have any. Opening a return or case. Please leave your home or office address address, not your P. It is only a replacement, an aftermarket part. But it can be used for you. The picture is for reference only, please refer to the real thing. Feedback & Customer Services. (30 days after receive the item). We will reply every message and solve your problem within 24 hours. We believe we can produce a positive outcome to any situation and will work hard to earn your praise. Our goal is to make sure you are a happy customer and pleasant shopping with us. Communication is the best way to solve problem.