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VS Air Fan Drives

The VS Air is an air-sensing fan drive that works smarter so your engine can work harder.

Equipped with a bimetal precision sensor, the viscous air-sensing fan drive delivers the right amount of cooling required. A fan that operates at maximum speed only when cooling requirements demand it can cut fuel costs significantly over the life of the vehicle. Modulation enables the drive to regulate the fan speed between idle and maximum rotational speed depending on the air temperature, quickly responding to even small temperature fluctuations.


  • Compressors
  • Compactors
  • Forklifts & Telehandlers
  • Generator sets
  • Agricultural tractors
  • Backhoe loaders
  • Excavators
  • Construction equipment
  • Heavy-duty trucks
  • Medium-duty trucks
  • Light-duty trucks
  • Automotive
  • Variety of other off-highway equipment
  • Variety of on-highway trucks and vehicles


Maximum torque60 N-m [531 in.-lbs.]120 N-m [1062 in.-lbs.]150 N-m [1327 in.-lbs.]
Typical Fan Diameter500-700mm (20-28 in.)680-850mm (27-34 in.)700-1016mm (28-40 in.)
Typical Horsepower Range37-93 kW [50-125 HP]90-300 kW [125-400 HP]90-300 kW [125-400 HP]
ActuationAir SensingAir SensingAir Sensing

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MS Series

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Shogun Modular Fans

Ideal for reduced-emission engines with flexibility in terms of blade counts and bolt circles fastened by rivets to a durably-constructed center disk. Available diameter range: 406.4 – 559 mm [16” – 22”]