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Jul 1, 2003 12:00 PM

Hendrickson's new Primaax air suspension is designed for the demands of vocational and heavy-haul truck and tractor applications. It features a suspension geometry that reduces suspension-induced driveline vibration.

Primaax has been field-tested in applications with peak engine torques as high as 2,200 ft-lb, resulting in elimination or reduction of frame rise during peak driveline torque often found in trailing arm air suspensions. This reduction of frame rise and suspension geometry combine to maintain pinion angles throughout axle travel.

The suspension geometry in Primaax also boosts stability. Forged support beams, outboard-mounted torque rods, and a highly engineered crossbeam combine to deliver up to twice the amount of roll stiffness of other air-ride suspensions.

Primaax has large-volume air springs and heavy-duty shock absorbers. The improved ride quality also reduces noise, vibration, and harshness for longer life of truck components and body equipment. Air springs and shock absorbers are packaged within the envelope of the tire.

With a 46,000-lb tandem rating, Primaax is available for use with multiple lift axles and GCWR of 180,000 pounds. It also offers up to 8" of axle travel for improved suspension articulation.

Primaax comes in single-, tandem-, and tridem-axle ratings of 23,000, 46,000, and 69,000 pounds. It should be available in April 2003. For more details, contact Hendrickson, 800 S Frontage Rd, Woodridge IL 60517-4904.