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Service bulletin TIB-13-038

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 id10056316
Published by NHTSA2014-10-29
Manufacturer's numberTIB-13-038
Manufacturer's date2014-08-22
NHTSA componentEQUIPMENT

NHTSA's summary

KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. MANUFACTURED WRONG O RING INSTALLED, RESULTING IN MUCH SHORTER LIFE THAN CORRECT PART AND WILL FAIL EARLY IN LIFE OF THE VALVE FOR PARK BRAKE. *PE

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

Equipment and accessories

Vehicles listed
KENWORTH KENWORTH

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