Hendrickson Truck Suspensions

Hendrickson AR2 Air Over Walking Beam Suspension


AR2™ delivers a lighter weight for more payload capacity, long life, and better ride for improved durability for less downtime, high articulation capabilities for on/off road applications and designed and manufactured components that deliver more comfort and even better system performance.

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Primaax EX

PRIMAAX® EX is a severe-duty vocational air suspension that  features a robust structural design with optimized suspension geometry for exceptional stability, handling and ride. Advanced suspension technology for the rigorous demands of vocational, severe-service, and heavy-haul applications. The system suspension-induced driveline vibration is significantly reduced with PRIMAAX EX compared to competitive trailing-arm air suspensions, resulting in higher driver comfort and less premature wear on expensive truck and body equipment.

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Hendrickson Primaax EX Severe duty Vocational Air Suspension
Hendrickson ULTIMAAX-Advanced Severe-duty Rubber Suspension


ULTIMAAX® is recommended for dump, logging, refuse, mixer, oil field and mining applications. 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. 

Capacities up to 60,000 lbs. with additional capacities under development.

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Both HAS 40K and HAS 46K are approved for use with lift axles and up to 25 percent off-highway operation. HAS™ 40K/46K air suspensions provide excellent on- and off-highway performance, ride quality, and cargo protection. In addition, the HAS family of suspensions is available with optional EDGE System to help reduce driveline vibration.

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Hendrickson HAS Light-duty Vocational Air Suspension
Hendrickson HN VariRate Spring System

HN Series

The VariRate® Spring System provides a unique balance between unloaded ride quality and loaded stability and eliminates the need for center bushings, making the HN maintenance-free. The HN offers significant weight savings versus competitive suspensions. Applications include dump, rufuse, mixer, logging and military. HN® is designed to reduce weight and improve ride quality without sacrificing durability and stability in vocational applications.

Capacities of 40,000, 46,000 and 52,000 lbs.

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RT/RTE Series

Hendrickson-designed springs provide a consistent spring rate for longer life as the equalizing beams distribute load equally between both axles for improved traction. The system performs well in a variety of vocational truck applications such as dump, refuse, mixer and military applications. RT™/RTE™ is a durable steel spring suspension with a legacy of over 90 years of reliability in the most severe applications.

RT capacities up to 65,000 lbs. and RTE capacities up to 50,000 lbs.

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Hendrickson HAS Light-duty Vocational Air Suspension

Hendrickson Truck Suspension Systems

BrandModelInfoParts ManualSales ManualService Manual
HendricksonAR2View Page AR2 Parts ManualAR2 Sales ManualAR2 Service Manual
HendricksonHAS 40LH-400 Tandem AxleView Page HAS 40LH-400 Tandem Axle Parts ManualHAS 40LH-400 Tandem Axle Sales ManualHAS 40LH-400 Tandem Axle Service Manual
HendricksonHASView Page HAS Sales ManualHAS Maintenance Manual
HendricksonHAS single Axle SpartanView Page HAS-single-Axle-Spartan-Parts-ManualHAS single Axle Service Manual
HendricksonHN FRView Page HN-FR-Parts-ManualHN-FR-Sales-ManualHN FR Service Manual
HendricksonHNView Page HN Parts ManualHN Sales ManualHN Service Manual
HendricksonPrimaax EXView Page Primaax EX Sales Manual
HendricksonPrimaax EX - Army Heavy Dump TruckView Page Primaax EX - Army Heavy Dump Truck Sales Manual
HendricksonPrimaax EX - CaterpillarView Page Primaax EX - Caterpillar Parts ManualPrimaax EX - Caterpillar Service Manual
HendricksonPrimaax EC Composilite SC MixerView Page Primaax EC Composilite SC Mixer Sales Manual
HendricksonPrimaax EX-Firemaax EXView Page Primaax EX-Firemaax EX Parts ManualPrimaax EX-Firemaax EX Service Manual
HendricksonPrimaax EX-FreightlinerView Page Primaax EX-Freightliner Parts ManualPrimaax EX-Freightliner Sales Manual
HendricksonPrimaax EX-InternationalView Page Primaax EX-International Parts ManualPrimaax EX-International Sales ManualPrimaax EX-International Service Manual
HendricksonPrimaax EX-KenworthView Page Primaax EX-Kenworth Parts ManualPrimaax EX-Kenworth Sales ManualPrimaax EX-Kenworth Service Manual
HendricksonPrimaax EX-MackView Page Primaax EX-Mack Parts ManualPrimaax EX-Mack Service Manual
HendricksonPrimaax EX-MilitaryView Page Primaax EX-Military Sales Manual
HendricksonPrimaax EX-TridemView Page Primaax EX-Tridem Sales Manual
HendricksonPrimaax EX-VolvoView Page Primaax EX-Volvo Parts ManualPrimaax EX-Volvo Sales ManualPrimaax EX-Volvo Service Manual
HendricksonRT-RTE Heavy DutyView Page RT-RTE Heavy Duty Sales ManualRT-RTE Heavy Duty Service Manual
HendricksonRT-RTE InternationalView Page RT-RTE International Sales Manual
HendricksonRT-RTE MilitaryView Page RT-RTE Military Sales Manual
HendricksonRT-RTEView Page RT-RTE Parts ManualRT-RTE Sales ManualRT-RTE Service Manual
HendricksonUltimaaxView Page Ultimaax Sales Manual
HendricksonUltimaax Fire RescueView Page Ultimaax Fire Rescue Parts ManualUltimaax Fire Rescue Sales ManualUltimaax Fire Rescue Service Manual
HendricksonUltimaax InternationalView Page Ultimaax International Parts ManualUltimaax International Service Manual
HendricksonUltimaax KenworthView Page Ultimaax Kenworth Parts ManualUltimaax Kenworth Service Manual
HendricksonUltimaax MilitaryView Page Ultimaax Military Sales Manual
HendricksonUltimaax Western StarView Page Ultimaax Western Star Sales ManualUltimaax Western Star Service Manual

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transmission warranty

Differentials, Transmissions, Transfer Cases & PTOs are new and rebuilt by Pro Gear and covered with a one year, unlimited mileage warranty. *See warranty. All other warranties are that of the manufacturer.