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Service bulletin 4628

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 id10000233
Published by NHTSA2003-02-20
Manufacturer's number4628
Manufacturer's date2002-10-01
NHTSA componentSTEERING:HYDRAULIC POWER ASSIST SYSTEM

NHTSA's summary

NELSON SEE-THROUGH POWER STEERING RESERVOIR COVER REPLACEMENT. *TT

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

Steering, Power steering

Vehicles listed
FREIGHTLINER ARGOSY
FREIGHTLINER BUSINESS CLASS
FREIGHTLINER CENTURY
FREIGHTLINER COLUMBIA
FREIGHTLINER CORONADO

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