2014 Kenworth T680 technical service bulletins
44 technical service bulletins and manufacturer communications cover the 2014 Kenworth T680.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- Troubleshooting procedures for 2.1m cab power windows are now available.
- Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
- Certain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual...
- Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid...
- Information Only – C hassis equipped with MY2021 B EPA emission s standards will be shipped through...
- An engine software update is required to resolve OBD system readiness, DEF doser diagnostics, and otherOBD...
- Non-Safety Campaign – The batteries may drain quickly due to the VECU not going to sleep
- Non-Safety Campaign – Chassis with the City Horn option may generate unexpected alerts
- Information Only – Windshield washer pumps have a high No Trouble Found rate
- Fix-As-Fail
- Information Only:
- Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
- Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed,...
- Information Only: The AutoStart System Test does not recognize the hood opening and closing when running...
- Emissions Campaign â The Engine Overspeed lamp may illuminate during a smoke opacity test
- Information Only
- Fix-As-Fail The evaporator core may crack in vehicles with the ISX-15 engine
- Information Only:
- Information Only â
- Fix-As-Fail: Two separate causes have been identified as root
- Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have...
- Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
- Information: J1939 CAN BUS Best Practices
- Information only
- Fix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
- Non Safety Campaign: The circuit for the Trailer Hotline/Trailer Power may not be properly protected on...
- Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
- Non-safety campaign: replace the molded air intake pipe, which CAN crack and allow road debris into the engine
- Non-safety campaign: watson & chalin lift axle frame brackets with slotted lower mounting holes may...
- Fix-as-fail: an internal issue may cause some HVAC mode door actuators to fail
- Fix-as-fail: the heat-stake mounting studs used to retain the fixed panel cover CAN fatigue
- Fix-as-fail - engine over-speed lamp could come on after a downshift with the eaton ultrashift plus...
- Eaton ultrashift plus excessive engine over-speed lamp on.
- T680 predictive cruise control(PCC) incompatibility with cummins engine.
- Product improvements available front engine accessory drive (FEAD) update - improve the life of air...
- Kenworth: due to developing borate salt crystals from a batch of DOT4 fluid, causing a blockage in clutch...
- Kenworth: during assembly, oil supply line had not been properly seated and resulted in oil pressure to...
- Kenworth: a max governed cc speed, on some trucks, was programmed incorrectly and limits maximum default...
- Kenworth: while driving some trucks, the combination overdoor lamp will flicker and defective lamps will...
- Kenworth: on some trucks, the air dryer bracket will crack and become loose, resulting in failure
- Kenworth: two related issues concerning misdiagnose low coolant condition and unnecessary coolant pump...
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