2014 Kenworth T800 TSBs
24 Technical Service Bulletins across 11 categories
Categories
Engine
6 bulletinsKenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid over-repairs and to...
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provide warrantable repair guidance. Oil leaks, if not repaired, can lead to severe engine damage.
An engine software update is required to resolve OBD system readiness, DEF doser diagnostics, and otherOBD system...
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software related issues.
Eaton ultrashift plus excessive engine over-speed lamp on.
FIX-AS-FAIL - ENGINE OVER-SPEED LAMP COULD COME ON AFTER A DOWNSHIFT WITH THE EATON ULTRASHIFT PLUS TRANSMISSION.
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THIS DOES NOT AFFECT THE FUNCTION OF THE VEHICLE.
E-ONE VEHICLES ARE DESIGNED WITH ELECTRICAL CIRCUIT PROTECTION (E.G.
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FUSES), TO PROVIDE OVERCURRENT PROTECTION DURING SHORT-CIRCUIT CONDITIONS OR MALFUNCTION OF COMPONENTS. FUSES ARE SOMETIMES SHARED AMONGST DIFFERENT CIRCUITS. FOR EXAMPLE, THE CIRCUITS FOR THE PUMP PRIMER MOTOR AND CHASSIS POWER SHARE A COMMON 300AMP FUSE. IF EITHER OF THESE CIRCUITS EXPERIENCES AN ELECTRICAL OVERLOAD, THE FUSE WILL ACT AS DESIGNED TO PROTECT THE USERS AND THE VEHICLE FROM FURTHER DAMAGE. AS SUCH, AN OVERCURRENT CONDITION IN THE PUMP PRIMER CIRCUIT WILL ALSO DISCONNECT MAIN POWER FROM THE CAB AND CHASSIS AND CAUSE THE ENGINE TO SHUT DOWN.
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER.
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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, 880. *PE UPDATED 1/6/15. *PE
Other
4 bulletins"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes.
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2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
KENWORTH: INFORMATION REGARDING THE TRUCKS EXCEEDING FMVSS 121 STANDARDS BUT FAILS TO MEET QUALITY STANDARDS BY KENWORTH.
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*LJ
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER.
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A MAX GOVERNED CC SPEED, ON SOME TRUCKS, WAS PROGRAMMED INCORRECTLY AND LIMITS MAXIMUM DEFAULT SPEED TO 63 MPH. *PE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER.
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THERE IS AN INCORRECT FAMILY NAME ON GREENHOUSE GAS COMPLIANCE LABEL AND NEEDS TO BE REPLACED. MODEL T370, T440, T660, T800. *PE
Body & Paint
3 bulletinsInformation Only Windshield washer pumps have a high No Trouble Found rate.
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Washer pumps may fail to spray due to a clogged filter.
KENWORTH CHASSIS: INFORMATION REGARDING MISAPPLIED GHG DOOR LABELS MAY NOT HAVE BEEN INSTALLED AT ALL, ON SOME...
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TRUCKS, OR POSSIBLY APPLIED TO INCORRECT TRUCK. *LJ SEE DOCUMENT SEARCH BUTTON FOR OWNERS LETTER. *LJ
KENWORTH: PROCEDURAL INFORMATION PROVIDED REGARDING THE REPLACEMENT OF HOOD WHERE THERE ARE DAMAGED HOOD POCKETS.
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MODEL T800. *PE
Electrical
3 bulletinsInformation Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the...
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appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
Information Only Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead...
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to water intrusion and corrosion in some vehicles.
Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
Suspension
2 bulletinsFix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
Fix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
Brakes
1 bulletinCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume...
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requirements per FMVSS/CMVSS 121 Air Brake Systems. This bulletin will be updated when repair parts and procedures are available.
Transmission
1 bulletinFix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator...
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(LCA) fault codes leading to possible LCA hardware replacement.
Software & Calibration
1 bulletinInformation Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer.
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The issue can be temporarily resolved using any one of the included procedures.
HVAC & Climate
1 bulletinInformation Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the...
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A/C compressor.
Pre-Delivery & Maintenance
1 bulletinInformation Only This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke...
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Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
Lighting
1 bulletinKENWORTH: SOME TRUCKS FAILED TO MEET COMPANY STANDARDS FOR AIR VOLUME LIFT AXLE AND THE COMPANY WILL INCREASE AIR...
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VOLUME FOR WORTHWHILE IMPROVEMENT TO EXCEED GOVERNMENT FMVSS 121. MODEL T800, W900. *PE