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Service bulletin 15-027

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 id10161167
Published by NHTSA2019-06-11
Manufacturer's number15-027
Manufacturer's date2019-06-10
NHTSA componentSTEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

Non Safety Campaign: ZF (supplier) steering gear boxes may have a sealing plug not seated corrected allowing power steering fluid loss.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories, Steering, Power steering

Vehicles listed
KENWORTH T6802019
KENWORTH T8802019
PETERBILT 5672019, 2020
PETERBILT 5792019, 2020

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