All Northern RTF coolers feature fin turbulators in the tubes. This design meets industry standards specified in applications for RTF coolers.
Transmission and Hydraulic Oil Coolers
Northern round tube & fin (RTF) oil coolers are interchangeably used for cooling a variety of oils and fluids in a wide variety of truck, agricultural, and industrial equipment applications. Because the uses overlap and the coolers are the same, any given RTF style cooler may have hundreds of OEM part numbers. But unlike other parts, if you can identify the cooler by sight or dimension, you can easily find the replacement cooler.
Engine Oil Coolers for Heavy Duty Gasoline, Diesel, LP and Natural Gas Powered Engines
Northern RTF Oil Coolers may be used for all engine oil cooler applications for gasoline, diesel, LP or natural gas powered engines. All Northern RTF coolers' heat transfer performance is enhanced by the patented inner fin turbulator. Rated at 200 psi operating pressure, the RTF cooler offers a cost efficient high performance alternative to the light duty coolers used as OEM on thousands of pickups, SUVS, trucks, tractors and construction equipment. For best results, Northern recommends that the RTF Oil Cooler be mounted in front (on the grill side) of the radiator.
The most common RTF cooler used as an engine oil cooler is part # 191240
Agricultural and Industrial Hydraulic & Hyrdrostatic Oil Coolers
Hydraulic and Hydrostatic oil coolers are used in thousands of OEM applications and while each has an OEM part number, the coolers used are usually identified by visual features i.e. number of rows of tubes, physical size and inlet & outlet fitting requirements. Since tracking OEM part numbers of the various uses is an impossible task, we suggest you use physical appearance, product measurements and inlet/outlet characteristics to help you make your product selection.