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Service bulletin FSB 561-023

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 id10083023
Published by NHTSA2016-10-20
Manufacturer's numberFSB 561-023
Manufacturer's date2013-07-17
NHTSA componentENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

NHTSA's summary

THE INCOMPATIBILITY OF HOSE ID AND COMPRESSOR FITTING SIZE HAS CAUSED THE COMPRESSOR HOSES TO COME LOOSE/BLOW OUT FROM THE AIR COMPRESSOR FITTINGS.

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, Cooling system

Vehicles listed
MACK GU2010 to 2014

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