Hendrickson — HN


Hendrickson — HN

Description

This walking beam suspension features bar pin end bushings with no center bushings for the beams to pivot on. The traditional center bushing is replaced by 2 large bolster springs (4 per vehicle.).

Hendrickson HN

Fast Facts

Hendrickson — HN
Type Walking beam suspension with bar pin end bushings.
Features
Problem Areas No center bushings for the beams to pivot on. The transverse rod is critical, especially in high center of gravity applications like dump trucks, and concrete mixers.
ATRO Solutions

 Tech Tips and Additional Resources

The proper number of shims for the auxiliary spring can vary according to application and unladen tandem weight. Refer to ATRO Technical Bulletin TB001-012418.


 Wear Items

  • The transverse rod is critical, especially in high center of gravity applications like dump trucks, concrete mixers. Check periodically for wear.
  • Check bolsters for cracks/debonds
    • Replace if material is cut 1" length or 3/8" in depth
    • Replace if bond separation is >1/2" deep
  • Auxiliary spring should be replaced if the spring itself measures less than 3 1/2" in height when the truck is unloaded.

Failure Analysis:

Location Possible Primary Failure Point
Debond at top plate Check torque rods for bushing failure
Debond at lower plate Check bar pin end bushing for failure

 Key Parts

ATRO Bar Pin Bushing Kit EB50-21013
Bar Pin Bushing Kit

EB50-21013

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ATRO Bolster Spring Kit LP50-24000
Bolster Spring Kit

LP50-24000

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ATRO Auxillary Load Spring Kit LP50-24974
Auxillary Load Spring Kit

LP50-24974

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ATRO Torque Rod Bushing TS38000
Torque Rod Bushing

TS38000

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ATRO Tapered Torque Rod Bushing
Tapered Torque Rod Bushing

TT38000

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ATRO Two-Piece Torque Rod TR71000, TR75000, TR76000
Two-Piece Torque Rod

TR71000 Female
TR75000 Male
TR76000 Male

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Details

Hendrickson HN suspension details
Hendrickson HN

Auxillary load spring, LP50-2400 Bolster Spring, "V" bracket, equalizing beam.