Dana’s new suspended front-drive steer axle improves on-highway performance for off-highway vehicles.

The suspended axle consists of an existing axle with a modified housing, coupled with a four-bar linkage design, a pair of double-acting hydraulic lift cylinders, and a Hall-effect suspension position sensor. The axle is connected to an electro-hydraulic control system, which constantly monitors the vertical suspension position and adjusts it accordingly, based on front axle load variations. This results in better position control, superior shock absorption, self-stabilization and control at various load levels, and self-leveling benefits.

The suspended axle adds energy absorption and damping capabilities. These provide increased safety, better driver comfort, extended component life, and improved handling and traction at higher highway speeds. 

“We took the lead in this case, and our engineers developed this product specifically for the market – before there was interest or demand,” says Bob Brazeau, director of engineering in Dana’s Spicer Off-Highway Products Division. “Once we introduced the concept to our customers, there was a natural evolution of the design to meet their specific needs.”

Initially, two models with oscillation and vertical suspension capabilities have been made available to the OE market. The larger suspended steer and drive axle has a carrying capacity of 13,300 pounds and is suited to tractor engines rated up to 270 horsepower. The smaller version is for engines rated up to 140 horsepower.

Dana’s new suspended axle is connected to an electro-hydraulic
control system that monitors the vertical suspension position and
adjusts it based on front axle load variations.