WenmarOpen by Wenmar Pro

Service bulletin FL721A-E

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 id10158056
Published by NHTSA2019-04-08
Manufacturer's numberFL721A-E
Manufacturer's date2017-07-28
NHTSA componentFUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY

NHTSA's summary

FL721 CNG Fuel Tank and CPDM Mounting Location

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

Fuel system, Fuel tank

Vehicles listed
FREIGHTLINER CASCADIA2013, 2014, 2015, 2016

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
ICI17-0182019-04-08. Service bulletin. FL721 Fifth Revised Bulletin
0607-172019-04-08. Service bulletin. SPN 96 (MCM) (GHG17)
0312-172018-06-18. Service bulletin. (MCM) GHG17
0320-172018-06-18. Service bulletin. (MCM)(GHG17)
706-132018-06-18. Service bulletin. 706-13 SPN 157-FMI 10, 15, 17, 18 - GHG14
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
FSB-49-342014-05-30. Service bulletin. 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