PRIMAAX EX - Hendrickson
PRIMAAX® EX is a premium, heavy-duty air suspension designed specifically for the rigorous demands of vocational, severe-service and heavy-haul applications. PRIMAAX EX provides the same benefits as the original PRIMAAX system with additional features designed to increase durability, reliability and handling characteristics. The optimized geometry features a new frame hanger and torque rod configuration that provides increased roll stiffness and reduced roll steer for improved handling. Suspension-induced driveline vibration is significantly reduced with PRIMAAX EX compared to competitive trailing-arm air suspensions.
  • Redesigned cast structural beams utilize premium materials to improve durability more than 350%*
  • New, more robust frame hanger design to meet a variety of grueling vocational and severe-duty applications
  • Optimized suspension geometry contributes to more than twice the roll stability of competitive air suspensions, helps improve handling and roll stiffness for expanded applications and significantly controls suspension-induced driveline vibration
  • Structural beams include integrated end caps that form a solid connection with the square cross brace to form a rigid torsion system for improved stability and control
  • Superior off-road mobility with up to 12.5 inches of diagonal wheel travel and 8 inches of vertical axle travel
  • Advanced-design air springs lift and support the load with less air pressure, while providing superb ride quality
  • Premium, heavy-duty bushings require no lubrication for reduced maintenance
  • QUIK-ALIGN® system helps simplify axle alignment for reduced maintenance time and extended tire life

    *Based on lab testing
Model PAX 232 PAX 262 PAX 462 PAX 522 PAX 692 PAX 782
Capacity (lbs.) 23,000 26,000 46,000 52,000 69,000 78,000
Installed Weight1 (lbs.) 542 651 1,078 1,292 1,629 1,931
Axle Configuration Single Single Tandem Tandem Tridem Tridem
GCW Approval2 (lbs.) 90,000 140,000 190,000 245,000 See6 See6
Site Travel Rating3 (lbs.) 30,000 33,000 60,000 66,000 90,000 99,000
Axle Travel4 (in.) 8 8 8 8 8 8.5
Ground Clearance (in.) 10.75 10.5 10.75 10.5 10.75 10.5
Lift Axles Approved Approved Approved Approved Approved Approved
Ride Heights5 (in.) 8.5 to 10.5
12.5 to 15.5		 8.5 to 10.5
12.5 to 15.5		 8.5 to 10.5
12.5 to 15.5		 8.5 to 10.5
12.5 to 15.5		 8.5 to 10.5
12.5 to 15.5		 8.5 to 10.5
12.5 to 15.5
Engine Torque Restrictions None None None None None None
Axle Spacing (in.) N/A N/A 52 to 72.5 54 to 72.5 52 to 60 54 to 60

• PRIMAAX® EX is approved for vocational and heavy-haul vehicle applications including, but not limited to: truck, tractor, dump, front and rear discharge mixer, logging, crane mounted, platform, fire / rescue, specialty and vehicles equipped with outriggers. All applications must comply with applicable Hendrickson specifications and must also be approved by the respective vehicle manufacturer with the vehicle in its original, as-built configuration. Contact Hendrickson and the respective vehicle manufacturer for approval of additional applications.

• For additional details regarding specifications, applications, capacities, and operating, service and maintenance instructions, refer to applicable Hendrickson technical literature.

1. Installed weight includes complete suspension, torque rods, axle and frame brackets and all hardware. Published weight is for standard PRIMAAX EX suspension using 10.0-inch ride height. Other configurations may change weight.

2. Contact Hendrickson or original equipment manufacturer for applications that may exceed GVW / GCW approval ratings.

3. Site Travel Rating — Operators using vehicles equipped with liftable push or tag axles must not exceed published ratings. Ratings are limited to no more than five percent of vehicle operation at a speed not to exceed five mph. Liftable pusher or tax axles should be raised (or unloaded) to improve vehicle maneuverability in off-road use or when vehicle is empty. Site travel ratings are consistent with specifications and must not be exceeded.

4. Axle travel may be limited by vehicle manufacturer; axle stop settings and shock stroke may restrict suspension's articulation. Varying ride heights and configurations may restrict travel.

5. For different ride height options, please contact Hendrickson, your truck manufacturer or dealer for further information.

6. Refer to axle manufacturer's recommendation.

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Saturday, March 13, 2010