WenmarOpen by Wenmar Pro

Service bulletin FSB-284-048

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 id10055201
Published by NHTSA2014-04-22
Manufacturer's numberFSB-284-048
Manufacturer's date2014-02-01
NHTSA componentEQUIPMENT; ENGINE

NHTSA's summary

MACK TRUCK: DUE TO OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAIN OIL GALLERY PRESSURE SENSOR OR PISTON COOLING JET PRESSURE SENSOR HAS FAILED AND NEW ANTI WICKING JUMPER HARNESS IS AVAILABLE TO STOP OIL FROM WICKING BACK AND CAUSING DAMAGE TO NEW SENSOR. MODEL CHU, CXU, GU, LEU, MRU, TD. *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

Engine, Equipment and accessories

Vehicles listed
MACK CHU2006 to 2010
MACK CHU2013
MACK CXU2006 to 2010
MACK GRANITE (GU)2012 to 2013
MACK GU2006 to 2011
MACK LEU2007 to 2013
MACK MRU2007 to 2013
MACK PINNACLE (CHU)2011 to 2012
MACK PINNACLE (CXU)2011 to 2013
MACK TD2010 to 2012

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