Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 440 bulletins for KENWORTH
TIB-27-003
Nov 4, 2013
103000 POWER TRAIN:AUTOMATIC TRANSMISSION
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. DUE TO THE LENGTH OF THE DIPSTICK (TOO LONG), BEING INCORRECT, IN SOME TRUCKS/CHASSIS, IT FAILS TO GIVE AN INACCURATE READING FOR FLUID LEVEL IN THE TRANSMISSION. MODELS 2012 K270,
TIB-42-050
Nov 1, 2013
114000 ELECTRICAL SYSTEM:WIRING
KENWORTH: PROCEDURAL INFORMATION REGARDING THE EXAMINATION OF COOLANT SENSOR WIRING WHEN CHASSIS RECEIVES FAULT CODES. MODEL ALL EPA 2013 CHASSIS BEFORE 9/17/13. *PE UPDATED 12/17/13. *PE
TIB-02-132
Oct 30, 2013
220000 SEATS
KENWORTH: IN SOME VEHICLES THE FRAME OF THE STATIC SEAT BASE MAY EXHIBIT FATIGUE AND CRACK AT THE WELDED JOINT. REFER TO THE ATTACHED PROCEDURE TO REPLACE TO THE PASSENGER SEAT BASE WITH A TOOLBOX. MODEL INCLUDES T680 CHASSIS MANUFACTURE
TIB-02-133
Oct 30, 2013
355100 EQUIPMENT:OTHER:LABELS
KENWORTH:THE WEIGHT RATING LABEL IN THE SLEEPER STORAGE IS INCORRECT AND MUST BE REPLACED. MODEL T680 CHASSIS MANUFACTURED BEGINNING 9/30/2013 ENDING 10/11/2013. *JS
TIB-43-033
Oct 11, 2013
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
KENWORTH: ON SOME VEHICLES THE EXHAUST HANGER BRACKETS CAN FATIGUE AND CRACK WHERE THEY ARE ATTACHED TO THE FRAME. USE THE ATTACHED PROCEDURE TO REPLACE THE BRACKETS WITH SLOTS TO BRACKETS HAVE ONLY HOLES. MODELS INCLUDE T680 CHASSIS MAN
TIB-43-032
Oct 7, 2013
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
KENWORTH: SOME VEHICLES HAVE DEF LINES ROUTED INCORRECTLY. ERROR CODES P3859 (MX ENGINE) AND P3568 (CUMMINS), DEF DOSER IS NOT RESPONDING OR IS OUT OF ADJUSTMENT FAULT. MODEL INCLUDES T660/T700 AERO MANUFACTURED BEGINNING 04/08/2013 ENDING
TIB-02-131
Aug 23, 2013
130000 VISIBILITY
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOME VEHICLES MAY EXPERIENCE A MALFUNCTION WITH THE SUN VISOR. THE SUN VISOR MAY FLUTTER IN CERTAIN CONDITIONS. THIS CAN CAUSE THE ROOF PANELS TO CRACK. *JS
TIB-02-130
Aug 22, 2013
160000 STRUCTURE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION CONCERNING THE UNDER CAB CLOSEOUTS. EXHAUSTS CAN CONTACT DPF HARNESS. THIS CAN CAUSE A FAULT CODE OR THE VEHICLE TO GO IN TO LIMP MODE DEPENDING ON THE SEVERITY OF THE IN
TIB-27-002
Aug 22, 2013
103700 POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER
KENWORTH: INFORMATION CONCERNING THE ALLISON TRANSMISSION WHICH HAS THE INCORRECT TORQUE CONVERTER FOR THE APPLICATION. APPLIED VEHICLES 26 T800S, W900S, AND C500S MANUFACTURED BETWEEN 1/25/2013 AND 7/15/2013 WITH ISX ENGINE AND ALLISON AUT
SB-E-072
Aug 2, 2013
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION INVOLVING A CHASSIS SOFTWARE UPDATE. BUILT BETWEEN 1/1/2013 AND 7/26/2013 OPERATED BY PACCAR MX-13 EPA2013 ENGINES. *JS
TIB-32-006
Jul 2, 2013
111000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
KENWORTH: INFORMATION ON THE VERIFICATION OF THE BATTERY TORQUE SETTING. THE TORQUE CAN BECOME UNDERTORQUED AFTER SITTING. AFFECTED CHASSIS: 3080 WITH EPA 2013 PACCAR MX-13 ENGINES. MANUFACTURED BEFORE 06/21/2013. *JS
TIB-34-049
Jun 18, 2013
114000 ELECTRICAL SYSTEM:WIRING
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOFTWARE NEEDS TO BE UPDATED (P30-1011-108), DUE TO RECALLED REMOVAL AND DISABLING OF 13KWB, TO FIX PRE TRIP LIGHT INSPECTION FUNCTION ISSUE AND REINSTALL SWITCH. MODELS 2013 T680, T8
TIB-43-030
Jun 18, 2013
060000 ENGINE (PWS)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON SOME TRUCKS, CHASSIS WERE INCORRECTLY PROGRAMMED FOR DIESEL EXHAUST FLUID (DEF) LEVEL SETTING AND CREATES A SITUATION WHERE WARNINGS ILLUMINATES LOW DEF SOONER THAN DESIRED. NO
TIB-43-031
Jun 17, 2013
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
KENWORTH: SEE DOCUMENT SEARCH BUTTON SEARCH BUTTON FOR OWNER LETTER. DUE TO DEF DOSER NOT RESPONDING OR IS OUT OF FAULT ADJUSTMENT, THE COOLANT LINES (CROSSOVER EXHAUSTS) ARE ROUTED INCORRECTLY, IN SOME CHASSIS, AND MAY CAUSE ERROR CODES
TIB-E-068
Jun 5, 2013
060000 ENGINE (PWS)
KENWORTH: INFORMATION REGARDING CERTAIN TRUCKS TO HAVE INSTALLED IMPROVED UPDATED CRANK CASE VENTILATOR (CCV) FOR PACCAR MX-13 2013 EMISSIONS ENGINES. MODELS CHASSIS 365794, 964059. NO MODEL YEARS LISTED. *PE
E065
Feb 4, 2013
061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
MX RC5-RC14 SOFTWARE UPDATE CAMPAIGN. SOFTWARE UPDATES ARE SAID TO BENEFIT THE ENGINES IN RC5 AND RC14 KENWORTH ENGINES. PACCAR/KENWORTH. *KB
TIB-14-023
Jan 30, 2013
061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
KENWORTH: ON SOME MANUFACTURED CHASSIS, THE CLEARANCE BETWEEN FRAME RAIL AND CHARGE AIR COOLER PIPE MAY BE INADEQUATE AND CONDITION NEEDS TO BE INSPECTED AND CORRECTED, IF REQUIRED. MODELS 2011-2012 K270, K370.
TIB-52-021
Jan 30, 2013
114200 ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH
KENWORTH: CERTAIN CHASSIS WERE MANUFACTURED, INCORRECTLY, WITH CAB POWER OUTLET AND CABLE COIL, UNDER DASH. MODELS 2011-2012 K270, K370. *PE
TIB-45-048
Jan 16, 2013
061110 ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS
KENWORTH: AN ERROR IN MANUFACTURING OF COOLANT PUMP PULLEY RESULTED IN A DECREASE IN PULLEY STRENGTH. MODELS MX-13 ENGINE. *PE
TIB-45-046
Jan 3, 2013
114000 ELECTRICAL SYSTEM:WIRING
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE WIRES FOR THE TEMPERATURE AND BAROMETRIC PRESSURE (TBAP) SENSOR HARNESS, MAY BE EXPOSE TO CHAFING OR RUBBING ON CHASSIS, AND WOULD NEED TO BE INSPECTED. MODELS 2012 K270, 370,
TIB-E-062
Jan 3, 2013
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
KENWORTH: ON SOME CHASSIS, FUEL LINE ROUTING CLAMP WAS OMITTED AND CORRECTIVE ACTION IS REQUIRED. MODELS 2012 T800, W900. *PE
TIB-E063
Nov 16, 2012
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TRUCK CHASSIS MANUFACTURED WITH AIR COMPRESSOR SUCTION HOSE SUPPORT CLIP AND INFORMATION IS PROVIDED FOR REPAIR TO CORRECT SHORTAGE. MODELS 2012 T660, T700. *PE
TIB-E061
Nov 9, 2012
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SPECIFIC PRODUCT IMPROVEMENT ELEMENTS ARE DESCRIBED IN BULLETIN FOR CHASSIS BENEFITING FROM ENGINE SOFTWARE UPDATES. MODELS 2010-2012 T660, T700, T800, W900. *PE
TIB-26-023
Nov 6, 2012
060000 ENGINE (PWS)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TRANSMISSION DOES NOT AUTOMATICALLY UPSHIFT WHEN HIGH IDLE SPEED OF ENGINE IS EXCEEDED DUE TO LACK OF PROPER CALIBRATION OF TRANSMISSION FOR-ENGINE. MODELS 2010-2012 T660, T700 AND T
TIB-16-037
Oct 26, 2012
021500 SUSPENSION:FRONT:CONTROL ARM
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CORRECTION ON LISTED CHASSIS, AFTER NEWAY SUSPENSION CONTROL ARM PIVOT JOINT BOLT TORQUE WAS CHECKED AND INSPECTED. MODELS 2012 C500S, T800S, W900S. *PE