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Service bulletin sb2050

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 id10141691
Published by NHTSA2018-06-18
Manufacturer's numbersb2050
Manufacturer's date2018-02-26
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

sb2050 Surge-Tank Cap Replacement

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

Engine, Cooling system

Vehicles listed
FREIGHTLINER ARGOSY2004, 2005, 2006, 2007, 2008, 2009, 2010
FREIGHTLINER CENTURY CLASS2004 to 2010
FREIGHTLINER COLUMBIA2005, 2006, 2007, 2008, 2009, 2010

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

Other bulletins for the same vehicles and component
sb20802018-06-18. Service bulletin. sb2080 Australian CST M1400 Isolated Radiator RetrofitB
sb20742018-06-18. Service bulletin. sb2074 Kysor Fan Clutch Rocking Runout Inspection
sb20692018-06-18. Service bulletin. sb2069 Kysor Fan Clutch Sticking
sb20582018-06-18. Service bulletin. sb2058 Early EPA07 QLD Radiator Replacement
sb20532018-06-18. Service bulletin. sb2053 New Stainless Steel Lower Radiator Tubes
20-732018-02-12. Service bulletin. 20-73 - CANCELED: Cascadia Radiator Update?EPA10 with DDC Engines
sb20802017-11-17. Service bulletin. sb2080 Australian CST M1400 Isolated Radiator Retrofit
FSB-83-1352011-11-28. Service bulletin. FREIGHTLINER: BULLETIN PERTAINING TO THE REPLACEMENT OF AIR CONDITION HIGH PRESSURE (FAN CYCLING) SWITCH ON CERTAIN MODEL TRUCKS. *PE
SB-20-642011-04-04. Service bulletin. FREIGHTLINER: FAN CLUTCH NUTS. ALWAYS USE NEW NYLOC NUTS WHEN INSTALLING THE ENGINE COOLING FAN ON A BORG WARNER (KYSOR) FAN CLUTCH. FAILURE MAY LEAD TO A LOOSE OR LOST FAN, AND DAMAGE TO THE FAN CLUTCH OR TRUCK. *PE
SF383A2008-03-19. Service bulletin. FREIGHTLINER - MODINE RADIATOR MOUNTING JOINTS. MODELS AFFECTED: SPECIFIC FREIGHTLINER CENTURY CLASS S/T AND COLUMBIA VEHICLES, STERLING L-LINE VEHICLES AND WESTERN STAR 4900 VEHICLES MANUFACTURED BETWEEN AUG. 28, 2006 AND JAN. 29, 2007. *NJ