Hendrickson Truck Systems Group recently announced availability of Primaax heavy-duty air-ride rear suspension on International trucks. International offers Primaax 46,000-pound capacity (PAX 460) and Primaax 23,000-pound capacity (PAX 230) suspensions on all PayStar and WorkStar series trucks.
Launched in 2003, Primaax is suited for vocational trucks in a variety of applications, from dump trucks to heavy-haul tractors, and from truck-mounted cranes to logging trucks. With a significant number of trucks built today with specialized equipment susceptible to damage from prolonged exposure to vibration and road inputs, the smooth air-ride of Primaax proves especially beneficial, according to Hendrickson. Primaax is designed to deliver a smooth ride on the highway while traveling to jobsites, while providing outstanding handling and stability after leaving the paved road.
Heavy-duty forged support beams, premium outboard mounted torque rods and a highly engineered cross brace combine to deliver greater roll stiffness as compared to other rear air-ride suspensions, Hendrickson says; Primaax features large volume air springs and premium heavy-duty shock absorbers for outstanding handling characteristics that can provide the driver with greater control during lane changes, highway ramp operation and tight road maneuvers. Delivering up to 12 inches of diagonal articulation and eight inches of axle travel, Primaax helps improve traction and provide greater off-road mobility, while up to 10.75 inches of ground clearance enhances maneuverability over rough terrain, according to the company.
Primaax is designed to provide numerous maintenance-saving features, such as premium rubber bushings that eliminate lubrication requirements; while Hendrickson’s proprietary Quik-Align system is engineered to simplify axle alignment without welding or drop-in shims. Hendrickson says its premium torque rods feature bonded rubber bushings for longer service life, and the outboard mounted longitudinal rods improve serviceability.