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Service bulletin FSB-49-34

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 id10055471
Published by NHTSA2014-05-30
Manufacturer's numberFSB-49-34
Manufacturer's date2014-03-01
NHTSA componentFUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY

NHTSA's summary

FREIGHTLINER: DUE TO COMPRESSION SET, A LEAKAGE MAY OCCUR DURING EXTREME COLD CONDITIONS, FROM THE O RINGS IN COOLANT SOLENOID VALVE 13 AND 23 GALLON DEF TANKS. KIT IS AVAILABLE FOR REPLACING O RINGS IN VALVE. *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

Fuel system, Fuel tank

Vehicles listed
FREIGHTLINER 108SD2014
FREIGHTLINER 114SD2014, 2015
FREIGHTLINER 122SD2014
FREIGHTLINER BUSINESS CLASS M22014
FREIGHTLINER CASCADIA2014, 2015

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

Recalls for the same vehicles and component
14V6800002014-10-29. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
FL721A-E2019-04-08. Service bulletin. FL721 CNG Fuel Tank and CPDM Mounting Location
ICI17-0182019-04-08. Service bulletin. FL721 Fifth Revised Bulletin
0607-172019-04-08. Service bulletin. SPN 96 (MCM) (GHG17)
611-132018-06-18. Service bulletin. 611-13 Removal and Installation of the GHG14 Six-Gallon Diesel Exhaust Fluid Tank Header
0127-172018-04-16. Service bulletin. 0127-17 SPN 1077 FMI 14 (GHG14) (GHG17) (MCM)
1110-142017-10-21. Service bulletin. 1110-14 EPA10 DOC Inlet Pressure Sensor
FSB-49-352014-06-04. Service bulletin. FREIGHTLINER: DURING EXTREME COLD TEMPERATURES, THE RETURN FITTING OF THE 6 GALLON DEF TANK HAS PROBLEM WITH DEF FREEZING. MODEL 122SD, CORONADO, BUSINESS CLASS M2, CASCADIA, 108SD, 114SD. *PE