Ensure your semi is Ready for the Road Ahead with enhanced hydraulic oil cooling, with the Thermaflow 9.2" 30 gpm Hydraulic Cooler Assembly. With a series of fans that rapidly cool the hydraulic oil, this replacement cooler assembly is the ideal option to increase overall hydraulic performance. Crafted with a thin and compact body and electric fan motor to be suitable for a wide variety of vehicles. FleetPride is your First Click in Heavy Duty .