Viscous fan drives are the economical choice for efficiency, performance and quiet operation. BorgWarner fan drives offer the latest in engineering innovations, including fully modulating, cost-effective fan drives that control fan speed in direct proportion to engine cooling needs. The Kysor on off fan drive assemble provides substantially more torque. In fact, it has been proven to have the most dynamic torque capacity in the market. Fans Hubs and Controls get higher performance which translates into more power to the engine. Unlike the competition, the Kysor fan clutch is easily serviced due to its modular design. There is no need to remove the assembly since the clutch can simply be removed from the hub. Less time results in substantially reduced maintenance costs.