Mack® LR and Mack TerraPro® Models Now Available with HAULMAXX EX Suspension


GREENSBORO, NC (August 9, 2022) – Mack Trucks announced today that the Mack® LR and Mack TerraPro® models are available to order with the optional HAULMAXX EX suspension system, improving capability, uptime, and total cost of ownership.

“The newly available HAULMAXX EX suspension on our cab-over models gives our customers more choice and offers increased capability offering capacities of 40,000 pounds, 46,000 pounds, and now 52,000 pounds, with up to a 75,000-pound site rating,” said Josh Seiferth, Mack Trucks cabover product manager. “The heavy-duty rubber suspension also increases durability and maximizes the life of the components for improved uptime and total cost of ownership for the customer.”

The HAULMAXX EX features a unique progressive load spring system that easily adjusts to the load for an enhanced combination of empty-ride quality and loaded stability. Angled bolster springs and unique progressive load springs provide exceptional stability for demanding applications.

The suspension design delivers an improved ride, reduced road shock, wheel hop and vibrations to the vehicle for longer service life and fewer repairs. The design requires no lubrication, has fewer bushings to maintain and features an integrated jounce stop that protects the rubber components from compression, ultimately reinforcing the vehicle’s durability. 

Mack LR and TerraPro models equipped with the HAULMAXX EX suspension offer increased tire clearance and up to 17 inches of diagonal wheel articulation for excellent off-road mobility on the challenging terrain often encountered by vocational trucks. The tire clearance was improved on the HAULMAAX EX to include packages with 315 tires and nine-inch steel wheels, while continuing to meet the SAE standard for tire chain clearance. 

The Mack LR model is designed to meet the challenges of refuse customers needing superior maneuverability, increased productivity, and improved visibility. The LR model comes standard with the Mack 11-liter MP®7 engine, delivering up to 355 horsepower and 1,260 lb.-ft. of torque. 

Mack’s rugged TerraPro model enables customers to pack maximum payload into a compact footprint. The TerraPro is available with the Mack MP7 and 13-liter Mack MP®8 engine with up to 505 horsepower and 1,869 lb.-ft of torque, as well as the Mack mDRIVE™ automated manual transmission. 

The HAULMAXX EX suspension replaces the HAULMAAX and HN suspensions previously available on these models. 
Both the LR and TerraPro models are standard with Mack GuardDog® Connect integrated telematics solution that proactively monitors the truck to help prevent unplanned downtime events.

For more information, visit your local Mack Trucks dealer or

HAULMAXX EX-Suspension

CAPTION:  Mack Trucks announced today that the Mack® LR refuse and Mack TerraPro® refuse, dump and concrete pumper models are available to order with the optional HAULMAXX EX suspension system, improving capability, uptime, and total cost of ownership.

Mack® trucks are sold and serviced through an extensive distribution network in more than 45 countries. Mack trucks, diesel engines and transmissions sold in North America are assembled in the United States. Mack manufacturing locations are certified to the internationally recognized ISO 9001 standard for quality, ISO 14001 standard for environmental management systems and OHSAS 18001 standard for health and safety management systems. Mack is also a proud sponsor of Share the Road, an American Trucking Associations public information campaign aimed at enhancing the safety of our nation's roadways.

Mack Trucks is part of the Volvo Group, which is driving prosperity through transport and infrastructure solutions, offering trucks, buses, construction equipment, power solutions for marine and industrial applications, financing and services that increase customer uptime and productivity. Founded in 1927, the Volvo Group is committed to shaping the future landscape of sustainable transport and infrastructure solutions. The Volvo Group is headquartered in Gothenburg, Sweden, employs almost 100,000 people and serves customers in more than 190 markets. In 2020, net sales amounted to about $36.8 billion. For more information, please visit