Hendrickson enhances Primaax vocational air suspension

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For expanded application capabilities, Hendrickson says its Primaax EX system — an enhanced version of the Primaax heavy-duty vocational truck air suspension — improves durability and performance while delivering substantial weight savings.

Primaax air suspensions are suited for a variety of vocational and construction applications, including concrete mixers, dump trucks, heavy-haul tractors, refuse vehicles, truck-mounted cranes and logging trucks. Refinements in the Primaax EX system, according to the company, include enhanced joint integrity and durability, improved handling, increased air spring capacity, greater disc brake compatibility and improved resistance to torque rod bushing walk-out.

The Primaax EX system features the company’s cast-austempered and shot-peened ductile iron support beams that integrate the attachment points to facilitate greater reliability. Primaax EX geometry features a new frame hanger and torque rod configuration designed to provide increased roll stiffness, reduced roll steer for improved handling, and reduced suspension-induced driveline vibration.

Expanded offerings of the longitudinal torque rods help provide extended bushing life, ease of serviceability and improved compatibility to package with disc brakes. The Primaax EX air springs feature improvements to the air spring piston shape and beam interface to help lift and support the load with less air pressure; furthermore, packaging improvements help reduce potential damage to the air spring.

Primaax EX will be available in capacities ranging from 23,000 to 26,000 pounds for single-axle applications; 46,000 to 52,000 pounds for tandem-axle; and 69,000 to 78,000 pounds for tridem-axle. For more information, go to www.hendrickson-intl.com.