Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 440 bulletins for KENWORTH
TIB-02-121
Sep 28, 2012
151300 SEAT BELTS:FRONT:RETRACTOR
KENWORTH: DUE TO DESIGN OF SEAT BELTS, AN EXTREME MOVEMENTS OR POSITIONS, BELTS DESIGNED FOR POSSIBLE CRASH AND WILL LOCK BELT RETRACTORS IN POSITION BECAUSE OF EXTREME ANGLE OF RETRACTOR OR TOO MUCH MATERIAL FED INTO MECHANISM. NO MODEL
ESA-34-045
Sep 14, 2012
114000 ELECTRICAL SYSTEM:WIRING
KENWORTH: INFORMATION REGARDING POSSIBLE CORRUPTION OF ENGINE SETTINGS IF CURRENT VERSION ESA 4.1.0.17 IS USED AND NOT FUNCTION PROPERLY AND A SPECIAL VERSION IS POSSIBLY REQUIRED FOR CHASSIS. MODELS 2012 T270, 370, 470,660, 800 AND W900
SB-45-045
Sep 11, 2012
060000 ENGINE (PWS)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN TRUCKS, WITH CNG FUELED ENGINE, AND WITH ENGINE BRAKE, PROGRAMMING FAILED TO EFFICIENTLY COORDINATE ABS DEPLOYMENT AND NOT GET UPLOADED ON CHASSIS. MODEL 2011 T660.
TIB-13-035
Sep 11, 2012
102000 POWER TRAIN:MANUAL TRANSMISSION
KENWORTH: SEE DOCUMENT SEARCH BUTON FOR OWNER LETTER. INFORMATION REGARDING RETROFIT ROUTING OF HARNESS BUNDLE HAS CHANGED FOR PREVIOUSLY BUILT MEDIUM DUTY CHASSIS, WITH ULTRASHIFT TRANSMISSIONS, TO NEW SPECIFICATION. MODELS 2011-2012
TIB-26-022
Aug 24, 2012
060000 ENGINE (PWS)
KENWORTH: SOME TRUCKS HAVE MISMATCH OF ENGINE CALIBRATION SOFTWARE AND ALLISON HARDWARE RESULTING IN HYDRAULIC PRESSURE BEING IMPROPER FOR SHIFT CONTROL. MODELS 2010 T270S AND T370S. *PE
TIB-34-043
Aug 13, 2012
110000 ELECTRICAL SYSTEM
KENWORTH: CERTAIN TRUCKS HAVE ISSUES WITH DOOR MODULE WAKE UP, MIRROR JITTERINESS AND HEAD AND PARK LAMPS SWITCH POSITIONS TIED TOGETHER. MODEL 2012 T680. *PE
TIB-02-120
Aug 10, 2012
220000 SEATS
KENWORTH: TESTING PROCEDURES SHOWS C- SCISSOR LINKAGE EXHIBITED EXCESSIVE RELATIVE MOTION AND INSTALLING NON CRITICAL SUPPORT BRACKET TO MINIMIZE RELATIVE MOTION OF C- SCISSOR LINKAGE. MODELS 39 QV AND VV T680S.. NO MODEL YEARS LISTED.
TIB-44-024
Jul 18, 2012
030000 BRAKES (PWS)
KENWORTH: REGARDING UPDATE INFORMATION FOR ENGINE BRAKE AND THROTTLE PEDAL POSITION RETURN RANGE, WHICH WAS TOO NARROW TO ENGAGE AND ENGINE BRAKE WAS NOT ENGAGING. *PE
TIB-E-055
Jul 9, 2012
061120 ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
KENWORTH: OIL COLLECTION AT CAC INTAKE PIPE IS CAUSED BY AN IMBALANCE IN TURBOCHARGER PRESSURES. MODELS T660, T800, T700, AND W900. *PE
TIB-03-047
Jul 2, 2012
092000 FUEL SYSTEM, OTHER:DELIVERY
KENWORTH: DIAGNOSTICS INDICATE FAILED FUEL LEVEL SENSOR FUNCTION IN REPAIRS AND BEFORE COMPONENT IS REPLACED, DIAL FACE SHOULD BE CLEANED AND FAILURE VERIFIED. ALL KENWORTH MODELS WITH OHM DIAL OR OPEN CARD STYLE FUEL SENDERS. *
TIB-E-053
Jun 21, 2012
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. LINE FATIGUE FAILURE MAY BE DUE TO EXCESSIVE VIBRATIONS OF HIGH PRESSURE FUEL LINES AND DIESEL FUEL LEAK AND MALFUNCTION INDICATOR LAMP. *PE
TIB-E-054
Jun 18, 2012
060000 ENGINE (PWS)
KENWORTH: DUE TO LOSS OF POWER AND HIGH FAILURE RATE, THE VALVES WILL BE REPLACED IN THE ENGINE FUEL CONTROL. MODELS T600, T700, T800 AND W900. MODEL YEAR 2011. *PE
TIB-34-042
Jun 1, 2012
117000 ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
KENWORTH: ON SOME TRUCKS, COMMUNICATION ISSUES LOGGED BY ECU, MAY CAUSE INSTRUMENT PANEL TO EXPERIENCE SWEEPING GAUGE NEEDLES, ENGINE FAULT CODES RELATED TO J1939 AND WARNING LIGHTS WOULD COME ON. *PE
TIB-E-056
May 17, 2012
060000 ENGINE (PWS)
KENWORTH (PACCAR): ENGINE SOFTWARE UPDATE REQUIRED FOR INSTALLATION OF HC DOSER SHIELDS AND/OR EGR CLEANING FOR CHASSIS. *PE
TIB-15-021
Apr 20, 2012
017210 STEERING:LINKAGES:DRAG:LINK:CONNECTION
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE CHASSIS MAY NOT HAVE THE PROPER ASSEMBLY CONTROLS IN PLACE FOR DRAGLINK CONNECTIONS TORQUE. MODELS C500, K500, T660, T800 AND W900 2011-2012. *PE
TIB-16-036
Mar 29, 2012
045000 SERVICE BRAKES, AIR:DISC
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN TRUCKS EQUIPPED WITH AIR DISC BRAKES (ADB) OR WITH REDUCED STOPPING DISTANCE (RSD), THE WRONG SIZE FRONT SPRING STOPPER WAS INSTALLED WHEN BUILT. *PE
TIB-E-052
Mar 26, 2012
062200 ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOFTWARE CORRECTION AND FAN CLUTCH LININGS REPLACEMENT MAY HAVE BEEN DAMAGED DUE TO OE PROGRAMMING. *PE
TIB-36-003
Mar 15, 2012
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN CHASSIS, THE TRANSMISSION TEMPERATURE FAILS TO BE ON THE NAVPLUS DRIVER DISPLAY AND CERTAIN CAUTIONS AND WARNINGS APPROPRIATE FOR HIGHWAYS NEEDS TO BE DISABLED FOR RESIDEN
TIB-43-027
Mar 5, 2012
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN TRUCKS, ON THE CHASSIS, CERTIFIED CLEAN IDLE DECALS WERE MISTAKENLY INSTALLED AND NEED TO BE REMOVED. *PE
TIB-14-022
Feb 29, 2012
060000 ENGINE AND ENGINE COOLING
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE SUPPORT BOLT TORQUE CAMPAIGN. *KB
TIB-01-057
Feb 6, 2012
357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CAMPAIGN TO REPLACE EXPANSION VALVES IN THE SLEEPER OF 470 CHASSIS LISTED. *KB
TIB-34-041
Jan 26, 2012
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: INFORMATION FOR AFTERTREATMENT, PMCI OR RELATED ISSUES, CAUSED BY CORROSION FOR WATER IN FUEL (WIF) SENSOR, AT ENGINE HARNESS J175 CONNECTOR. *PE
TIB-43-025
Jan 26, 2012
980000 UNKNOWN OR OTHER
KENWORTH: THE STANDARD PRODUCTION COMPONENTS ARE REPLACING THE PRE-PRODUCTION COMPONENTS. *PE
TIB-E-046
Jan 24, 2012
071110 FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE ORIGINAL STYLE OIL FILTER CAP SYSTEM IS BEING REPLACED BY AN IMPROVED OIL FILTER CAP LOCK SYSTEM. *PE
TIB-02-119
Jan 23, 2012
162810 STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE SINGLE TORSION BAR HINGE ASSEMBLIES IS BEING REPLACED WITH DOUBLE TORSION BAR ASSEMBLIES, NEW RUBBER HOLD DOWN STRAPS AND HOOD STOP CABLES TO IMPROVE HOOD LIFT ASSIST. *PE