Variable Pump Fan
System Illustrations

A variable pump hydraulic fan drive system continuously varies fan speed according to cooling demand. The variable hydraulic system saves power for applied work, fuel savings, or both. This becomes increasingly important as regulations require engines to run hotter.  A compact fixed displacement fan motor allows for these systems to be used on machines where there is less space between the radiator and engine.  Turolla OpenCircuitGear has compact fixed displacement offerings in the SGM and D Series fan drive motors.