2013 Kenworth T800 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Oct 13, 2026 Service bulletinDue to supplier constraints, an authorized aftermarket surge tank has been made available.
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Apr 9, 2024 Service bulletinCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
• Aug 3, 2022 Service bulletinKenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid...
• Feb 10, 2021 Service bulletinInformation Only – Windshield washer pumps have a high No Trouble Found rate
• Dec 18, 2020 Service bulletinFix-As-Fail
• Jun 8, 2020 Service bulletinInformation Only:
• Mar 17, 2020 Service bulletinInformation Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
• Mar 3, 2020 Service bulletinInformation Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed,...
• Dec 18, 2019 Service bulletinInformation Only
• Nov 6, 2019 Service bulletinInformation Only:
• Sep 27, 2019 Service bulletinInformation Only –
• Jul 28, 2016 Service bulletinFix-as-fail - engine over-speed lamp could come on after a downshift with the eaton ultrashift plus...
• Jul 28, 2016 Service bulletinEaton ultrashift plus excessive engine over-speed lamp on.
• Apr 24, 2015 Service bulletinKenworth: some trucks sleeper heaters are experiencing a leakage from sleeper heater core o ring coolant
• Feb 27, 2015 Service bulletinKenworth: some trucks failed to meet company standards for air volume lift axle and the company will...
• Aug 20, 2014 Service bulletinKenworth: due to developing borate salt crystals from a batch of DOT4 fluid, causing a blockage in clutch...
• Jun 24, 2014 Service bulletinKenworth: there is an incorrect family name on greenhouse gas compliance label and needs to be replaced
• May 9, 2014 Service bulletinKenworth: procedural information provided regarding the replacement of hood where there are damaged hood...
• Oct 2, 2013 Service bulletinTech Tip concerning Transmission Control Module (TCM) Recalibration for Kenworth
• Aug 22, 2013 Service bulletinKenworth: information concerning the allison transmission which has the incorrect torque converter for the...
• Feb 4, 2013 Service bulletinMx RC5-RC14 software update campaign
• Jun 21, 2012 Service bulletinKenworth: line fatigue failure may be due to excessive vibrations of high pressure fuel lines and diesel...