2011 Kenworth T440 technical service bulletins

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

• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Feb 10, 2021 Service bulletinInformation Only – Windshield washer pumps have a high No Trouble Found rate
• 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 –
• Feb 4, 2014 Service bulletinTech Tip concerning Kenworth Vehicle Configuration May Allow the Engine to Start in Range
• Jul 2, 2012 Service bulletinKenworth: diagnostics indicate failed fuel level sensor function in repairs and before component is...
• Mar 5, 2012 Service bulletinKenworth: on certain trucks, on the chassis, certified clean idle decals were mistakenly installed and...
• Jan 23, 2012 Service bulletinKenworth: the single torsion bar hinge assemblies is being replaced with double torsion bar assemblies,...
• Nov 22, 2011 Service bulletinKenworth: information regarding original equipment fittings not mating perfectly and result in leaks...
• Sep 16, 2011 Service bulletinKenworth: the front axle u bolts were manufactured on certain T3 and T4 series trucks with insufficient...
• Sep 12, 2011 Service bulletinKenworth: on certain trucks, the eaton transmissions may be susceptible to having water intrusion which...
• Aug 12, 2011 Service bulletinPaccar: water may seep between the wire insulation and potting of the fuel sensor
• Aug 5, 2011 Service bulletinPaccar: shackle links may have been manufactured incorrectly and have premature cracking and/or a possible...
• Aug 1, 2011 Service bulletinPaccar: there are cooling modules that may have a loose connection at the charge air cooler mounting
• Aug 1, 2011 Service bulletinPaccar: information on fan hub bearings inspection and warranty extension due to a higher than normal...
• Jul 6, 2011 Service bulletinPaccar: information on premature fan clutch lining wear
• Feb 1, 2011 Service bulletinPaccar: two rear cab fasteners may not have the proper torque