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Service bulletin WB13-29

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 id10131530
Published by NHTSA2018-04-02
Manufacturer's numberWB13-29
Manufacturer's date2013-05-13
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

NHTSA's summary

On the vehicles affected by this bulletin, a corrective measure is required due to bolts coming loose at the radiator fan clutch tripod attachment to the radiator. Addition of four (4) locknuts (jam nuts) will prevent bolts to loosen.

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

Engine, Cooling system, Radiator

Vehicles listed
PREVOST H3-412011 to 2013
PREVOST H3-452011 to 2013
PREVOST H3-VIP2011 to 2013
PREVOST WE2011 to 2013
PREVOST X32011 to 2013

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