This is a set of hydraulic oil coolers that we re-cored for a Hitachi EX5500 shovel for one of our mining customers. The original flat tube steel cores were leaking in several areas of the core due to cracks in the tubes. So we cut the tanks of off the original cores and then machined them up in our mill. We then welded the steel tanks to some new all copper round tubed cores. Once we got both hydraulic oil coolers all welded up we pressure tested both coolers in our test tank. Motor Mission Machine & Radiator 5435 Desert Point Dr. Las Vegas, Nv. 89118 Phone: (702) 649-2366 or (702) 649-0648 Fax: (702) 649-4133 www.MotorMission.com Facebook.com/MotorMission