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Service bulletin 1630

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10017105
Published by NHTSA2005-10-24
Manufacturer's number1630
NHTSA componentSUSPENSION

NHTSA's summary

54 INCH HENDRICKSON HAULMAAX SUSPENSION CAMPAIGN. SUSPENSION BEAMS INSTALLED ON THE ATTACHED CHASSIS LIST WERE MANUFACTURED WITH STEEL THAT DOES NOT MEET HEAT TREAT SPECIFICATIONS. 120 T800S AND W900S MANUFACTURED BETWEEN 04/14/05-05/31/05 AND EQUIPPED WITH HENDRICKSON HAULMAAX SUSPENSIONS. KENWORTH *SC

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Suspension

Vehicles listed
UNKNOWN UNKNOWN

Listing a model year does not mean every vehicle of it is concerned: the document says which.