Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 440 bulletins for KENWORTH
ESB E131
Sep 28, 2015
072100 FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
REPAIR PROCEDURE - INCORRECT INSTALLATION OF DEF PUMP MODULE.
E126
Sep 24, 2015
350000 EQUIPMENT
MX-13 EPA2013 MY2015 Replacement of Expiring Emissions Labels Chassis have a test exemption EPA/CARB label that must be replaced with a certified EPA/CARB label because the exemption expires on December 31, 2015.
TIB-32-008
Jul 28, 2015
060000 ENGINE (PWS)
KENWORTH: AN ULTRACAPACITOR ENGINE START MODULES (ESM), IN SOME TRUCKS, ARE NOT TREATED LIKE REGULAR BATTERY, DUE TO ELECTRICAL ENERGY STORAGE AND INTERNAL RESISTANCE IS EXTREMELY LOW AND ENERGY IS PROVIDED FASTER THAN BATTERY. MODEL T680
44-025
Jul 15, 2015
092300 FUEL SYSTEM, OTHER:FUEL FILTER
KENWORTH PACCAR: BULLETIN INFORMATION REGARDING PACCAR NEW FUEL FILTER FOR THE MX-13 ENGINE STARTING IN JANUARY 2015 TO COINCIDE WITH 2016 VEHICLES. *LJ
63-002
Jul 15, 2015
350000 EQUIPMENT
KENWORTH PACCAR CHASSIS 7U.S., T660, T880, AND W900 TRUCK TECH : BULLETIN INFORMATION INVOLVING NEW PRODUCTION MODEM BEING INSTALLED. *LJ
TIB-99-030
Apr 29, 2015
350000 EQUIPMENT
KENWORTH: INFORMATION PROVIDED ON CERTAIN REQUIRED TOOLS, FOR DEALERS, FOR THE REPAIRS ON TRUCKS. *PE
E117
Apr 24, 2015
060000 ENGINE (PWS)
PRODUCT IMPROVEMENTS AVAILABLE FRONT ENGINE ACCESSORY DRIVE (FEAD) UPDATE - IMPROVE THE LIFE OF AIR CONDITIONING COM0RESSOR CLUTCH BEARING.
TIB-01-063
Apr 24, 2015
350000 EQUIPMENT
KENWORTH: SOME TRUCKS SLEEPER HEATERS ARE EXPERIENCING A LEAKAGE FROM SLEEPER HEATER CORE O RING COOLANT. MODEL 2012-13 T680, T880. *PE
TIB-E-117
Apr 24, 2015
060000 ENGINE (PWS)
KENWORTH: TO EXTEND THE LIFE OF THE AIR CONDITIONER COMPRESSOR CLUTCH BEARING, NEW FEAD COMPONENTS HAS BEEN DESIGNED. *PE
TIB-E-118
Apr 24, 2015
357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
KENWORTH: SOME TRUCK CHASSIS NEED AIR CONDITIONING COMPRESSOR AND RECEIVER DRYER REPLACED WITH UPDATED COMPRESSOR CLUTCH BEARING AND PROCEDURE INFORMATION IS AVAILABLE. *PE
TIB-13-041
Apr 3, 2015
046000 SERVICE BRAKES, AIR:ANTILOCK
KENWORTH: ON TRUCKS, INSTEAD OF CORRECT ABS 6 UNIT BEING INSTALLED, THE BENDIX ABS 8 ECU WAS INSTALLED, INCORRECTLY ON GLIDER CHASSIS. *PE
13-040
Feb 27, 2015
040000 SERVICE BRAKES, AIR
KENWORTH: INFORMATION REGARDING THE TRUCKS EXCEEDING FMVSS 121 STANDARDS BUT FAILS TO MEET QUALITY STANDARDS BY KENWORTH. *LJ
TIB-13-040
Feb 27, 2015
023000 SUSPENSION:MULTIPLE AXLE
KENWORTH: SOME TRUCKS FAILED TO MEET COMPANY STANDARDS FOR AIR VOLUME LIFT AXLE AND THE COMPANY WILL INCREASE AIR VOLUME FOR WORTHWHILE IMPROVEMENT TO EXCEED GOVERNMENT FMVSS 121. MODEL T800, W900. *PE SEE DOCUMENT SEARCH BUTT
TIB-E-110
Feb 17, 2015
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: A NEW SOFTWARE IS AVAILABLE FOR THE DRIVER PERFORMANCE ASSISTANT (DPA) FOR RETROFITTING TRUCKS TO IMPROVE FUEL ECONOMY AND HAVE MAINTENANCE COSTS REDUCED. MODEL T680, 880. *PE
TIB01-062
Nov 20, 2014
351150 EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:LPG SYSTEMS:WATER HEATER
KENWORTH:PACCAR COMPANY: ESPAR SLEEPER HEATERS OVERHEATING, FREQUENTLY. MODELS T680/880. *LJ
43-043
Oct 2, 2014
171100 LATCHES/LOCKS/LINKAGES:DOORS:LATCH
KENWORTH CHASSIS: INFORMATION REGARDING MISAPPLIED GHG DOOR LABELS MAY NOT HAVE BEEN INSTALLED AT ALL, ON SOME TRUCKS, OR POSSIBLY APPLIED TO INCORRECT TRUCK. *LJ SEE DOCUMENT SEARCH BUTTON FOR OWNERS LETTER. *LJ
TIB-E-101
Sep 22, 2014
355100 EQUIPMENT:OTHER:LABELS
KENWORTH: A CERTIFIED EPA/CARB LABEL MUST REPLACED THE PREVIOUS TEST EXEMPTION EPA/CARB LABEL, WHICH WILL EXPIRE. MODEL 2013-2013 T680, T880. *PE
TIB-E-100
Aug 28, 2014
060000 ENGINE (PWS)
KENWORTH: THE 7 STEPS AND CLOSING ENGINE SUPPORT CENTER CASES ON DEALER PERFORMANCE REPORT. *PE
TIB-13-038
Aug 22, 2014
350000 EQUIPMENT
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. MANUFACTURED WRONG O RING INSTALLED, RESULTING IN MUCH SHORTER LIFE THAN CORRECT PART AND WILL FAIL EARLY IN LIFE OF THE VALVE FOR PARK BRAKE. *PE
TIB-23-001
Aug 20, 2014
101100 POWER TRAIN:CLUTCH ASSEMBLY:PEDAL/HAND LEVER(MOTORCYCLE)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. DUE TO DEVELOPING BORATE SALT CRYSTALS FROM A BATCH OF DOT4 FLUID, CAUSING A BLOCKAGE IN CLUTCH MASTER CYLINDER AND NOT ABLE TO COMPRESS CLUTCH OR POOR PEDAL FEEL. MODEL 2013 T680, 8
TIB-E-096
Aug 20, 2014
061320 ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. WHEN TRUCK WAS AT ENGINE PLANT, THE DRAIN LINES OF OIL AND COOLANT ATTACHED TO TURBOCHARGER, WAS UNDER TORQUED. *PE
TIB-26-025
Aug 6, 2014
103000 POWER TRAIN:AUTOMATIC TRANSMISSION
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. DURING ASSEMBLY, OIL SUPPLY LINE HAD NOT BEEN PROPERLY SEATED AND RESULTED IN OIL PRESSURE TO BEARINGS BEING REDUCED. MODEL 2014 T680. *PE
TIB-090
Jun 30, 2014
060000 ENGINE (PWS)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON SOME TRUCKS, THE LOGIC WAS REVERSED FOR PEB ENABLED/DISABLED, RESULTING IN TRUCKS BEING NON FUNCTIONAL WHEN PEB IS REQUIRED. *PE
TIB-E-087
Jun 30, 2014
060000 ENGINE (PWS)
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. A MAX GOVERNED CC SPEED, ON SOME TRUCKS, WAS PROGRAMMED INCORRECTLY AND LIMITS MAXIMUM DEFAULT SPEED TO 63 MPH. *PE
TIB-E-090
Jun 30, 2014
350000 EQUIPMENT
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON THE NEW CHASSIS, THE PEB FAILS TO WORK OR IS WEAK AND NEEDS UPDATING OF SOFTWARE. *PE