WenmarOpen by Wenmar Pro

Service bulletin FL721

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 id10141965
Published by NHTSA2018-06-18
Manufacturer's numberFL721
Manufacturer's date2017-02-01
NHTSA componentFUEL SYSTEM, GASOLINE

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

Vehicles listed
FREIGHTLINER 114SD2012, 2013, 2014, 2015, 2016
FREIGHTLINER 122SD2012 to 2016
FREIGHTLINER BUSINESS CLASS M22012 to 2016
FREIGHTLINER CASCADIA2012, 2013, 2014, 2015, 2016
WESTERN STAR 47002012, 2013, 2014, 2015, 2016
WESTERN STAR 49002012, 2013, 2014, 2015, 2016
WESTERN STAR 57002012, 2013, 2014, 2015, 2016
WESTERN STAR 69002012, 2013, 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
20164412016-09-09. Fuel System
20154832015-10-16. Fuel System
15V1050002015-02-23. FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
14V6800002014-10-29. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
14V5660002014-09-17. FUEL SYSTEM, DIESEL
20120802012-02-27. Fuel System

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
SS10330942021-06-09. Service bulletin. Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
FAB1532021-05-18. Service bulletin. Freightliner Action Bulletin FAB153 New Harness Highway for Cascadia
FTLCAE139-20132021-05-12. Service bulletin. INTERIOR STORAGE - Side Storage Bins Removed from Certain Cascadia Sleepers. SEAT BELTS - Height Adjustment Removed from Cascadia Passenger Side Seat Belt. FUEL TANKS - Fuel Tank Changes for 25" and 23" Tanks for Model Year 2015. TRANSMISSION - Correction to Allison 5th Gen Module 84L Definition Example. ADMINISTRATION - Model Year 2015 Changeover Date Established. APPENDIX A - 25" and 23" Diameter Cylindrical Fuel Tank Changes. APPENDIX B - Revised Allison 5th Gen New Modules and Definitions
TechTalk566541K2021-05-07. Service bulletin. Tech Talk discussion on Needing regen in same area every time.
TechTalk566596K2021-05-07. Service bulletin. Tech Talk discussion on DD15 injector cups.
18SP7452020-12-08. Service bulletin. Special Publication Letter for EPA07 EPA10 Three-Filter Fuel System DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit
18SP7442020-12-08. Service bulletin. Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit.
TechTalk77332020-11-03. Service bulletin. Tech Talk discussion on Engine dies, shuts off, no CEL no faults, due to clogged vent.
TechTalk27362020-09-30. Service bulletin. Tech Talk discussion about fuel economy with ICU4Me
TS10330142020-07-31. Service bulletin. Training Solutions for Fuel Leak Found at High Pressure Fuel Pump Weep Hole for Heavy Duty DD Engines. Occasionally we see trucks come in with fuel leaking from the high pressure fuel pump weep hole. This is NOT a defect in the pump and further diagnostics need to be performed to find the root cause.