Featuring modular design, DuroSpeed™ Fan Drive delivers reliable cooling for severe operating and vocational truck applications such as construction vehicles and municipal trucks. Pneumatically actuated drive has high disengaged fan speed to prevent engine temperatures from rising too quickly. Because fan drive engages and disengages less often, clutch life increases, noise decreases, and dust buildup in radiator is minimized. Drive has no spinning air connections to wear, inspect, or service.