VISCOUS AIR-SENSING FAN DRIVE Viscous air-sensing fan drives from Horton Sachs are equipped with a temperature sensor, which constantly senses the coolant temperature indirectly. At low temperatures, the viscous air-sensing fan drive runs in no-load operation and at high temperatures, it turns on. The fan, driven by the fan drive, achieves the maximum speed and provides the radiator with the necessary airflow and cooling. The viscous air-sensing fan drive prevents the constant and often unnecessary running of the fan, and it drives the fan only when necessary. A fan that operates when needed may result in fuel saving up to 10,000 liters (2,500 gallons), depending on the lifespan of the vehicle. FEATURES AND BENEFITS Lightweight - The viscous air-sensing fan drive from Horton Sachs has a lightweight design. Modulating fan speed - The temperature-dependent control, low hysteresis and fan speed modulation allow for optimum adjustment to external conditions. The regulating action is also ensured in cooler outside temperatures. Heavy-duty applications - The viscous air-sensing fan drive is available for heavy-duty applications. Completely sealed - Thanks to complete sealing, no regulation of storage or assembly is necessary. Variable fan use - The fan drive can be used with fans from Horton Sachs and other manufacturers. Stability - The viscous air-sensing fan drive comes without a vibration damper, crankshaft stable. Advantageous Cost/Benefit Ratio - The features of the design combined with our production technology allow for a competitive price. Modular Solution - We have designed our fan on a modular basis (fan drive plus fan). Accordingly Horton Sachs fan modules comply with individual customer requirements. Customer Samples - Test our fan drive. We will provide you with a sample according to your specifications.