ULTIMAAX®

Advanced severe-duty rear rubber suspension system

ULTIMAAX Advanced Severe-Duty Rear Rubber Suspension

In addition to its excellent durability, ULTIMAAX® delivers enhanced stability, handling and ride quality even in the most severe-duty environments where vehicles encounter harsh and unexpected ground conditions. The integration of Hendrickson's proven walking (equalizing) beam technology, with its patented progressive rate spring, provides a balance of loaded stability and unloaded ride quality even in the most rugged environments.


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ULTIMAAX Advanced Severe-Duty Rear Rubber Suspension

Features and Benefits

  • Recommended for fire/rescue, dump, logging, refuse, mixer, oil field, military and mining applications
  • Optimized design to balance robust durability and weight savings
  • Progressive rate springs provide a unique balance of unloaded ride quality and loaded stability
  • Fabricated walking-beam design equalizes axle loading while providing optimal clearance, axle travel and weight
  • Capacities up to 70K lbs.

Specifications

Suspension Rating (lbs.) 46,000 52,000 60,000 70,000
Installed Weight1 1,179 lbs. 1,198 lbs. 1,407 lbs. 1,750 lbs.
GVWR Approval(lbs.) Contact vehicle OEM2 Contact vehicle OEM2 Contact vehicle OEM2 Contact vehicle OEM2
GCWR Approval2 (lbs.) 400,000 400,000 450,000 450,000
Site Travel Rating3 (lbs.) 70,000 75,000 85,000 95,000
Diagonal Articulation4(in.) 17.5 17.5 17.5 17.5
Lift Axles Approved Approved Approved Approved
Ride Heights5 (in.) 9.5 to 13 9.5 to 13 9.5 to 13 12 in.+
Axle Spacing6 (in.) 52, 54, 56, 60 52, 54, 56, 60 54, 56, 60 56, 60

 

Hendrickson approves the use of HAULMAAX® EX in the following vocational truck applications: dump, concrete mixer, refuse, logging, crane / boom and platform. All such 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.
  1. Installed weight includes complete suspension, torque rods, axle brackets and frame brackets; add 31 lbs. for shock absorbers
  2. Suspension must be paired with appropriate axle rating
  3. Site travel rating – operators using vehicles equipped with liftable pusher or tag axles must not exceed published ratings. Site ratings are limited to no more than five percent of vehicle operation at speed not to exceed five mph. Liftable pusher or tag axles should only be raised (or unloaded) to improve vehicle maneuverability in job site applications or when vehicle is empty. Site travel ratings are consistent with published axle manufacturer’s limitations. Axle and suspension site travel ratings must not be exceeded.
  4. Suspension articulation may exceed vehicle’s capability and may be limited by vehicle manufacturer; vehicle manufacturer installed axle stops may restrict suspension’s articulation
  5. HAULMAAX EX ride height measurements are taken from the centerline of the axle to the bottom of the truck frame
  6. Contact Hendrickson for availability of beam lengths
  7. Shock absorbers are required in tractor and logging applications. Ride and traction may be improved in other applications with shock absorbers. Ride performance can be subjective and may be dependent on many factors beyond the suspension design, such as cab suspension, road conditions, body / auxiliary equipment, frame specifications, etc. Contact Hendrickson or your truck manufacturer / dealer for further information.
  8. HAULMAAX EX at 52,000 pound capacity installed weight includes complete suspension, dual rebound straps, longitudinal torque rods, Hendrickson TRAAX ROD® transverse torque rods, axle brackets and frame brackets; add 31 lbs. for shock absorbers

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