2021 Kenworth T800B technical service bulletins
30 technical service bulletins and manufacturer communications cover the 2021 Kenworth T800B.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- 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...
- Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- The verbiage in the Introduction section has been updated.
- The attached procedures document has been updated with more detail and explanations
- Bogie Crossmember Torque Value Update
- Procedure pictures updated for clarity
- Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
- Safety Recall Repair parts and procedures are now available
- Safety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900...
- Fix-as-fail
- Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins...
- PACCAR will reimburse customers for the local purchase of in-tank fuel additive for EPA2021 compliant MX...
- This campaign is the final opportunity to replace the oil filter screw cap to reduce occurrences of broken...
- Info Only
- Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid...
- Safety Recall â Interim Notification
- Nformation Only – New Level 1 required tools are available to support MY21B MX engines.
- Non-Safety Campaign – Sun Visors are available
- Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines,...
- Non-Safety Campaign
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
- Information Only
- Safety Recall â Cummins Fuel Rail Leak â the federal safety agency ID: 21V391 / TC: 2021-323, Cummins...
- Information Only – Windshield washer pumps have a high No Trouble Found rate
- Fix-As-Fail
- Fix-As-Fail – The Battery Management System (BMS) may report the incorrect battery condition
- Information Only:
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