Hendrickson — Intraax/Vantraax


Hendrickson — Intraax/Vantraax

Description

The Intraax is an integrated trailer air suspension, axle and brake system introduced in 1995. It is widely used and can be found on platforms, tankers, dumps, grain hoppers, specialty trailers — both on-highway and off-road.

The Vantraax is a tandem air slider system for dry-freight, refrigerated and specialty van trailers and has been available since 1998.

Intraax Vantraax Suspension System

Fast Facts

Hendrickson — Intraax/Vantraax
Type Intraax is an integrated trailer air suspension, axle and brake system
Vantraax is a tandem air slider system.
Features These suspensions feature a “tri-functional” bushing.
Problem Areas
ATRO Solutions

 Tech Tips and Additional Resources

ATRO’s installation tools will install/remove OE bushings and/or ATRO bushings. Remove the alignment pins when installing/removing the ATRO “Easy Install” bushings which don’t have voids. Conversely, the OE tool can be used to install/remove both OE and ATRO; simply remove alignment pins from the rear drive plate before attempting ATRO “Easy Install” installation/removal.

These suspensions feature a “tri-functional” bushing. It controls three road forces:

  • Vertical forces absorbed to reduce stress on the axle
  • Horizontal movement during braking and acceleration
  • Roll stability to maintain control while turning

Problem: The OE rubber bushing can be difficult to install because it has an oversized outer diameter in order to achieve a press fit into the axle beam and to compress the rubber to a hardness that will carry the load. The voids then allow for movement in the bushing.

Solution: ATRO replacement bushings simplify installation with a unique “Easy Install” solid bushing that requires less compression to install and allows free-rotation of the pin to eliminate torsional stress instead of using voids.

Benefits: ATRO Intraax/Vantraax bushings perform better, last longer, and are backed by a 3-year warranty.

ATRO Intraax/Vantraax Bushing Replacement

We offer two options for parts.

1) "Easy Install" replacement bushings
  • Solid bushing without voids
  • Outer diameter significantly smaller than OE rubber bushings (nearly 1" smaller O.D.)
  • The inner sleeve freely rotates to eliminate torsional stress (eliminating the need for voids)
  • Chemically-resistant polyurethane material

 Key Parts: "Easy Install" Replacement Bushings

ATRO Pivot Bushing Kit Standard Bolt PB50-36000-EI
Pivot Bushing Kit Standard Bolt

PB50-36000-EI Standard Bolt

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ATRO Pivot Bushing Kit Shear Bolt PB50-36001-EI
Pivot Bushing Kit Shear Bolt

PB50-36001-EI Shear Bolt

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ATRO Pivot Bushing Kit No Bolt PB50-36100-EI
Pivot Bushing Kit No Bolt

PB50-36100-EI No Bolt

All Products
ATRO Pivot Bushing Kit Standard Bolt w/Bolt Sleeve PB50-36914-EI
Pivot Bushing Kit Standard Bolt

PB50-36914-EI Standard Bolt w/Bolt Sleeve

All Products
2) Direct replacement bushings
  • Voids like the standard rubber bushing
  • Outer diameter is slightly smaller than OE rubber bushings
  • The inner sleeve is bonded in place
  • Chemically-resistant polyurethane material

 Key Parts: Direct Replacement Bushings

ATRO Pivot Bushing Kit Standard Bolt PB50-36000
Pivot Bushing Kit Standard Bolt

PB50-36000

All Products
ATRO Pivot Bushing Kit Shear Bolt PB50-36001
Pivot Bushing Kit Shear Bolt

PB50-36001

All Products
ATRO Pivot Bushing Kit No Bolt PB50-36100
Pivot Bushing Kit No Bolt

PB50-36100

All Products
ATRO Pivot Bushing Kit Standard Bolt w/Bolt Sleeve PB50-36914
Pivot Bushing Kit Standard Bolt

PB50-36914 w/Bolt Sleeve

All Products

 Key Parts: Narrow Bushings

ATRO Narrow Bushing Kit Standard Bolt PB50-36321
Narrow Bushing Kit Standard Bolt

PB50-36321

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ATRO Narrow Bushing Kit Shear Bolt PB50-36322
Narrow Bushing Kit Shear Bolt

PB50-36322

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Narrow Bushing Kit 6-3/4 Bushing PT50-59307
Narrow Bushing Kit 6 3/4" Bushing

PT50-59307 6 3/4" Bushing
PT50-59376 305/8" Bushing

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Key Replacement Parts

Hendrickson Key Parts—Suspension


Hendrickson Key Parts—Torque Rod

 Wear Items

Tri-functional bushing

  • Mode of failure: bushing tube spacers melt, inner sleeve separated from rubber.
  • Cause: excessive vertical movement of suspension arm caused buildup of excessive heat
  • Note: check to see if tires are out of balance or if shocks have failed

 Key Parts

Parts Identification Table

 Swipe table right for columns.

ATRO Part Number OE Bushing Easy Install* Voids Inner Pin Rotation Bolt Type Hardware Included Alignment Install Tool Quantity Per/Axle
PB50-36000 S-24691 No Yes No Hex Head Yes Quick-Align PT50-59307 2
PB50-36000-EI S-24691 Yes No - Solid Yes Hex Head Yes Quick-Align PT50-59307 2
PB50-36001 S-24691 No Yes No Shear Bolt Yes Quick-Align PT50-59307 2
PB50-36001-EI S-24691 Yes No - Solid Yes Shear Bolt Yes Quick-Align PT50-59307 2
PB50-36100 S-24691 No Yes No n/a Wear Washers Only Quick-Align PT50-59307 2
PB50-36100-EI S-24691 Yes No - Solid Yes n/a Wear Washers Only Quick-Align PT50-59307 2
PB50-36321 S-26321 No Yes No Hex Head Yes Quick-Align PT50-59307 1
PB50-36322 S-26321 No Yes No Shear Bolt Yes Quick-Align PT50-59307 1
PB50-36914 A-6914 No Yes No Hex Head Yes Welded Alignment PT50-59307 2
PB50-36914-EI A-6914 Yes No - Solid Yes Hex Head Yes Welded Alignment PT50-59307 2

Details

Hendrickson Intraax/Vantraax suspension details
Hendrickson Intraax/Vantraax

Suspension details showing frame bracket and pivot bushing.