#4286106 Radiator Hydraulic Oil Cooler For John Deere 790ELC Excavator Aluminum. High Performance Racing Spec. Type: Hydraulic Oil Cooler. Core Size(mm):745mm 890mm 50mm. Application: For John Deere 790ELC Excavator. Hydraulic oil coolers, also called heat exchangers, use air or water to cool fluid in hydraulic systems. They pass oil through a coil or core to cool the oil before it enters the system. Heated oil causes excess wear on seals, surfaces, and other components, which can cause particulate buildup, damage components, and shorten the system’s life span. Water oil coolers are compact and can be used in high-pressure applications such as those found in oil refineries and chemical processing plants. Air oil coolers pass heated fluid through a radiator-like core and use ambient air to cool hydraulic fluid. They do not require access to a power source, making them suitable for mobile applications where access to a power source is limited. These air-cooled oil coolers pass heated oil through a radiator-like heat exchanger and use ambient air to cool the oil. Ambient temperature affects the cooling capacity of these coolers. They are used in agricultural equipment, construction, sites, and other areas where access to a power source is limited. Please keep in mind that spending time before purchasing the part to confirm it is indeed exactly what you need can help prevent you from ordering the wrong part. Replace/return are available if buyers receive wrong/damaged/defective items. Anyway, by nice communications, we can find a way to make you satisfied. Very appreciated for your support. Feedback is very important to us. We will do our best to solve your problem as soon as possible. We appreciate your continued patience and willingness to work with us. Thank you for choosing us and have a great day!