PRIMAAX - Hendrickson
The PRIMAAX® is a premium heavy-duty air suspension designed specifically for the rigorous demands of vocational and heavy haul applications. PRIMAAX features a parallelogram suspension geometry that eliminates suspension induced driveline vibration, a phenomenon often found in trailing arm air suspensions with high torque engines. This geometry also results in greater stability for high center of gravity applications, such as dump, ready-mix, refuse and logging applications.
  • Improved ride and handling for on/off road applications.
  • Driveline vibration reduced or eliminated.
  • Up to 12.5 inches of diagonal wheel articulation for improved mobility.
  • Integrated stabilizer design results in greater stability than conventional air suspensions.
  • Suspension geometry reduces stress input to axle housing by transferring torsional forces within suspension components.
  • Premium, heavy-duty rubber bushings require no lubrication.
  • Air springs and shock absorbers designed to package within tire envelope for protection from external damage.
  • QUIK-ALIGN® system simplifies axle alignment for longer tire wear.
  • Heavy-duty torque rods and bushings are performance tested for longer service life.
  • Higher gross weight ratings with greater versatility.
Model PAX 230 PAX 260 PAX 460 PAX 520 PRIMAAX 6901
Capacity 23,000 LBS. 26,000 LBS. 46,000 LBS. 52,000 LBS. 69,000 LBS.
Installed Weight 2 525 LBS. 650 LBS. 1,030 LBS. 1,288 LBS. 1,555 LBS.
Axle Configuration Single Single Tandem Tandem Tridem
GCW Approval  3 90,000 LBS.. 140,000 LBS.. 180,000 LBS. 245,000 LBS. See7
Site Travel Rating 4 30,000 LBS. 33,000 LBS. 60,000 LBS. 66,000 LBS. 76,000 LBS.
Axle Travel 5 8 in. 8 in. 8 in. 8 in. 8 in.
Ground Clearance 10.75 in. 10.5 in. 10.75 in. 10.5 in. 10.75 in.
Lift Axles Approved Approved Approved Approved Approved
Ride Heights 6 8.5 / 10.0" to 15.5" 10.0" 8.5 / 10.0" to 15.5" 10.0 in. 8.5 / 10.0" to 15.5"
Engine Torque Restrictions None None None None None
Axle Spacing  N/A N/A 52 in. to 72.5 in 54 in. to 72.5 in. 52 in. to 60 in.
1. PAX 780 available upon request.

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

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

4. Site Travel Rating - Operations 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 m.p.h. 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.

5. Axle travel may be limited by vehicle manufacturer; axle stop settings may restrict suspension's articulation.

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

7. See axle manufacturer 's recommendation.

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© 2008 Hendrickson USA, L.L.C. (U.S. Rights) Hendrickson International Corporation (Rights Outside U.S.) All Rights Reserved
Friday, October 10, 2008