Abstract: A water-cooled remote fan assembly 59, 100 having an extra pulley set mounted between a water drive mechanism 81, 122 and a cooling fan 68, 114 for creating a second overdrive mechanism used to increase the rotational speed of the fan 68, 114 relative to the engine input speed. This provides the pulley-driven engine cooling system with improved cooling capabilities at low engine speeds. By decreasing the radius of one of the pair of auxiliary pulleys 62, 102, 87, 104 mounted to a transfer drive mechanism 66, 116 relative to the radius of a crankshaft pulley 80, 130, the transfer drive mechanism 66, 116 can rotate at a faster rate than the crankshaft pulley 80, 130. One or both of the pair of auxiliary pulleys 102, 104 may be mounted on a shroud 106 of the radiator 108 to provide better fan orientation and higher efficiencies for fan performance.

Abstract: A water-cooled remote fan assembly 59, 100 having an extra pulley set mounted between a water drive mechanism 81, 122 and a cooling fan 68, 114 for creating a second overdrive mechanism used to increase the rotational speed of the fan 68, 114 relative to the engine input speed. This provides the pulley-driven engine cooling system with improved cooling capabilities at low engine speeds. By decreasing the radius of one of the pair of auxiliary pulleys 62, 102, 87, 104 mounted to a transfer drive mechanism 66, 116 relative to the radius of a crankshaft pulley 80, 130, the transfer drive mechanism 66, 116 can rotate at a faster rate than the crankshaft pulley 80, 130. One or both of the pair of auxiliary pulleys 102, 104 may be mounted on a shroud 106 of the radiator 108 to provide better fan orientation and higher efficiencies for fan performance.