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A winding highway takes a turnA winding highway takes a turn

On-Highway Drives MSC2® Multispeed Fan Drives

MSC2 Multispeed Fan Clutch

In the low-speed mode, the MSC2 draws significantly less horsepower than an engaged on/off fan clutch. This helps when hauling on steep inclines in moderate climates by increasing the horsepower available to the drivetrain. The MSC2's transition from low- to high-speed also creates less change in available horsepower than an on/off fan clutch.


  • Buses and motor coaches
  • Off-highway equipment
  • Cranes
  • Cement mixers
  • Variety of off-highway equipment


Eddy current at low-speed with pneumatic lock-up*
Horsepower range
Up to 375 HP [280 KW]
Fan blade capacity
Up to 30 [76.2 cm]
Air pressure requirements
Minimum 90 psi [620.5 KPA]

* 3-speed version also available

Features & Benefits

  • Two-speed design provides optimal cooling in low mode for increased available horsepower, up to 50% less noise and reduced debris pulled into radiator
  • Simple design for lower maintenance requirements
  • Precise temperature control for maximum efficiency
  • Design enhances cab cooling and heating for operator and passenger comfort

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