There have been 2 technical service bulletins issued for the 2023 Peterbilt 579.
| Bulletin Date: | Sep. 18, 2023 |
| Component: | Electrical system. |
| Bulletin Summary: | For all peterbilt chassis equipped with an air shifted pto. Oil from the air shift cover of the pto may leak into the air line, causing the eoa solenoid to become inoperative. |
| Vehicles covered in this TSB: |
2015 Peterbilt 579,
2016 Peterbilt 579,
2017 Peterbilt 579,
2018 Peterbilt 579,
2019 Peterbilt 579,
2020 Peterbilt 579,
2021 Peterbilt 579,
2022 Peterbilt 579,
2023 Peterbilt 579,
2024 Peterbilt 579.
|
| Bulletin Date: | Sep. 1, 2023 |
| Component: | Engine and engine cooling. |
| Bulletin Summary: | Certain 579 mlu chassis equipped with cummins x15 engines have fan hub bracket hardware that are incorrect for the application and/or under torqued and could become loose and/or fail. Procedures are available to replace and properly torque |
| Vehicles covered in this TSB: |
2020 Peterbilt 579,
2021 Peterbilt 579,
2022 Peterbilt 579,
2023 Peterbilt 579.
|
| Bulletin Date: | Sep. 1, 2023 |
| Component: | Power train. |
| Bulletin Summary: | Certain 579 mlu chassis equipped with cummins x15 engines have fan hub bracket hardware that are incorrect for the application and/or under torqued and could become loose and/or fail. Procedures are available to replace and properly torque |
| Vehicles covered in this TSB: |
2020 Peterbilt 579,
2021 Peterbilt 579,
2022 Peterbilt 579,
2023 Peterbilt 579.
|