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Service bulletin 99WS001

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 id610465
Published by NHTSA2000-05-02
Manufacturer's number99WS001
Manufacturer's date1999-11-26
NHTSA componentSTEERING:HYDRAULIC POWER ASSIST SYSTEM

NHTSA's summary

CONCERNS WITH THE DRIVE GEARS FOR POWER STEERING ASSIST PUMPS FAILING ON VEHICLES WITH CAT 3406E ENGINES AND VICKERS V20F PUMPS. *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
WESTERN STAR WESTERN STAR

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