WenmarOpen by Wenmar Pro

Service bulletin FSB-874-051

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 id10034966
Published by NHTSA2011-02-02
Manufacturer's numberFSB-874-051
Manufacturer's date2010-09-01
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

MACK TRUCK: A/C HOSE CONDENSATION REMEDIATION. THE LOW PRESSURE A/C HOSE USED ON THE OPTIONAL REDDOT ROOF MOUNTED AIR CONDITIONING UNIT MAY DRIP CONDENSATION ONTO THE ELECTRONICS AND OPERATOR CONTROLS MOUNTED ON THE ENGINE TUNNEL. MODELS LEU, MRU. NO MODEL YEARS LISTED. *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, Heating and air conditioning

Vehicles listed
MACK LEU2007 to 2010
MACK MRU2007 to 2011

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