These are a couple of shell-and-tube style oil coolers for a couple of cranes. When these coolers came in they had brass bundle center sections which were made by Young. The original mid-sections were leaking and no longer available so we ordered some new bundle center sections which were slightly off with their bolt patterns in relation to the bolt patterns of the bonnetts. We ended up plugging the bolt holes in the bundle flanges and re-machining threaded holes in the bundle flanges to the same pattern as the end bonnets.
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