The HAULMAAX EX suspension geometry is optimized to provide better site rating, increased capacity ranges and improved durability. Utilizing industry leading validation techniques, high strength materials, and advanced manufacturing methods, HAULMAAX EX meets the increasing rigorous application demands by delivering the reliability and quality you’ve come to expect from Hendrickson, the leader in suspension technology.
HAULMAAX EX features a unique spring design that balances empty-ride quality and loaded stability. Angled bolster springs and a unique progressive load spring provide exceptional stability for
demanding applications such as refuse, concrete mixers and dump.
Among vocational customers, HAULMAAX EX is the rear rubber tandem suspension of choice because of its efficient lightweight fabricated design, progressive rate rubber spring system, load distributing waling beam and durable performance.
| Model | HMX EX 400 | HMX EX 460 | HMX EX 520 |
|---|---|---|---|
| Installed Weight 1 (lbs.) | 855 | 864 | 9588 |
| Suspension Rating (lbs.) | 40,000 | 46,000 | 52,000 |
| GVW Approval 2(lbs.) | 83,000 | 88,000 | 93,000 |
| GCW Approval (lbs.) | 160,000 | 190,000 | 245,000 |
| Job-Site Travel Rating 3 (lbs.) | 60,000 | 70,000 | 75,000 |
| Diagonal Articulation 4(in.) | 17 | 17 | 17 |
| Lift Axles | Approved | Approved | Approved |
| Ride Heights5 (in.) | 8 - 13.25 | 8 - 13.25 | 8 - 13.25 |
| Axle Spacing 6 (in.) | 52, 54 | 52 - 72.5 | 52, 54, 60 |
| Shock Absorbers 7 | Tractors, Logging | Tractors, Logging | Tractors, Logging |
Hendrickson approves the use of HAULMAAX® EX in the following vocational truck applications: dump, concrete mixer, refuse, logging, crane / boom, platform and fire / rescue.
1. Installed weight includes complete suspension, torque rods, axle brackets and frame brackets;
add 31 lbs. for shock absorbers.
2. Contact Hendrickson for applications that may exceed GVW approval ratings.
3. Job-site travel rating — operators using vehicles equipped with liftable pusher or tag axles must not
exceed published ratings. Job-site ratings are limited to no more than five percent of vehicle operation
at speeds 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. Job-site travel ratings
are consistent with published axle manufacturer’s limitations. Axle and suspension job-site travel
specifications 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. 52K installed weight includes complete suspension, double rebound straps, longitudinal torque rods,
Hendrickson TRAAX ROD™ transverse torque rods, axle brackets and frame brackets; add 31 lbs. for shock absorbers.
Technical literature available at www.hendrickson-intl.com or contact Hendrickson at 855.743.3733.
International
Kenworth
Peterbilt
Western Star
Freightliner
Autocar
Mack
Volvo
Hino