DM Advantage On/Off Pneumatic Fan Drives

On/Off Fan Drives

DM Advantage On/Off Fan Drives are spring-engaged and air-disengaged for maximum efficiency. They are lighter, have high torque for turning larger fans, a fail-safe design and a low parts count for simplicity.

The advantage is yours with the best, proven solution for the highest-heat under-hood applications. Horton’s latest innovations assure you of maximum reliability and long-life performance. Field tests were performed on over 410 trucks, which were driven more than a total of 85 million miles during product development*. Hundreds of thousands of OEM-installed DM Advantage Fan Drives have performed flawlessly in the highest-heat under-hood applications.


  • Maximum reliability
  • Longer operating life
  • Fuel savings
  • Reduced noise
  • Better engine performance
  • Engine coolant temperatures kept at optimum operating efficiency
  • Increased reliability in high-horsepower applications
  • Easy to install and maintain


  • Premium sheave bearing
  • Improved air cartridge
  • Long-wearing friction liner
  • Spring-engaged and air-disengaged
  • Lighter
  • High torque for turning larger fans
  • Fail-safe design
  • Low parts count for simplicity


  • Heavy-duty trucks
  • Medium-duty trucks
  • Buses
  • Off-highway equipment


Actuation: Spring-engaged, air disengaged
Minimum air pressure to disengage: 90 psi [620.5 KPA]
Out of box torque: 2400 in.-lbs. [271 N-m]
Friction disc diameter: 7.9 in. [200.6 mm]
Fan blade capacity (diameter): 32 in. [813 mm]
Engine horsepower range: 250-600 HP [186-447 KW]
Friction liner wear limit, minimum thickness: 0.23 in. [5.76 mm]

Premium Bearing vs. Deep Groove Hub Bearing

DM Advantage Bearing

• 14 rolling elements per row
• Highest load capacity
• High contact angle – withstands more thrust load
• Dual-lip Viton® seals
• Highly heat-resistant grease
• Size: 45 mm ID x 85 mm OD x 39 mm length

Previous Technology

• Deep groove bearings (2 needed)
• 10 rolling elements per row
• Preloaded to increase stiffness
• Dual-lip Viton seals
• Size: 45 mm ID x 85 mm OD x 19 mm length

Competitive Rear (Current Hub Bearing)

• Deep groove bearings
• 9 rolling elements per row
• Low load capacity
• Not preloaded
• Size: 45 mm ID x 85 mm OD x 19 mm length

Competitive Front (Current Hub Bearing)

• Deep groove bearings
• 9 rolling elements
• Not preloaded
• Lowest load capacity
• Size: 35 mm ID x 72 mm OD x 17 mm length

*Field test data is from January 2010.