2020 Kenworth T680 technical service bulletins
70 technical service bulletins and manufacturer communications cover the 2020 Kenworth T680, including one warranty extension.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Kw & pb DEF
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Certain chassis equipped with an engine model year 2019
- This optional software update is expected to be available after 10/30/2026 for chassis equipped with EMY...
- This bulletin, the troubleshooting procedure, and the BMS Troubleshooting Checklist have been updated to...
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
- The procedure has been updated to include additional steps for verifying the software level on the vehicle...
- This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and...
- Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson...
- The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to...
- The software is not yet available
- Updated Eaton's TAIB0885EN Bulletin link.
- An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR...
- The PACCAR Powertrain Prognostics Webcast video link has been removed
- Kenworth
- Troubleshooting procedures for 2.1m cab power windows are now available.
- Procedures have been updated to include additional truck models in the service intervals table.
- Fix-as-Fail On certain Kenworth T680 chassis equipped with PACCAR MX-13 engines, wiring to the Horton...
- The attached procedures document has been updated with more detail and explanations
- Bogie Crossmember Torque Value Update
- EPA17-24 mx
- Engine Air Filter Servicing UPDATE
- EPA17-24 MX-13
- Procedure pictures updated for clarity
- Certain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis...
- Safety recall
- Condition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be...
- Campaign Certain PACCAR MX-13 engines contain bolts for the main bearing caps which may fail under certain...
- Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
- Certain T680 Next Gen Cummins X15 have fan hub bracket hardware that is under torqued and could become...
- Replacement fuel bezels are available for T680 Next Gen fairings
- Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins...
- Certain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual...
- This campaign is the final opportunity to replace the oil filter screw cap to reduce occurrences of broken...
- Info Only
- Certain T680 NextGen air filter elements that may have been damaged due to excessive vibration were...
- Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid...
- Safety Recall â Interim Notification
- Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
- Retrofit
- Non-Safety Campaign:Â Eaton Endurant transmissions may experience premature Main Drive Gear damage due to...
- Non-Safety Campaign: Drivers of vehicles equipped with PACCAR TX-12 transmissions may experience harsh...
- Non-Safety Campaign âÃÂàVehicles with a Cummins X15 engine and Horton fan drive may set...
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
- Information Only
- Information Only – C hassis equipped with MY2021 B EPA emission s standards will be shipped through...
- 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
- Non-Safety Campaign
- Fix-As-Fail
- Fix-As-Fail – The Battery Management System (BMS) may report the incorrect battery condition
- Information only: In 2020, Peterbilt and Kenworth began using the same M10, M12, M16, and M20 frame...
- Fix-As-Fail – The Master Switch Module (MSM) may lose dash switch memory and functionality when the...
- Non-Safety Campaign – The end cap welds on certain fuel tanks may not meet internal quality standards due...
- Information Only:
- Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
- Fix-As-Fail: The seal on T680, T880, and W990 windshields may be delaminated
- Information Only
- Information Only: The AutoStart System Test does not recognize the hood opening and closing when running...
- Information Only
- This bulletin has been obsoleted and replaced by Safety Recall 19KWE.
- Fix As Fail-Shudder sensation near the governed vehicle speed when using cruise control due to excessive...
- Information Only:
- Information Only â
- Fix-As-Fail: Two separate causes have been identified as root
- Non Safety Campaign: Holland Series FW17 fifth wheel handles may remain in an unlocked position when...
- Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
- T680 predictive cruise control(PCC) incompatibility with cummins engine.
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