Freightliner 114SD 2018–2021 — technical service bulletin
Bulletin 18SP736 · NHTSA communication 10180517 · issued Sep 30, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2021
model years
36
vehicle entries
Official summary
Detroit Diesel Special Publication informing about Heavy Duty Friction Style Belt Tensioner Kit. This heavy duty friction style belt tensioner kit contains the belt tensioner and two M10 bolts to correctly pin the friction style belt tensioner. The M10x80mm bolt is used to pin the engine cooling fan drive arm. The M10x50mm bolt is used to pin the engine accessory drive arm.
Vehicles covered
- 2018 Freightliner 114SD
- 2019 Freightliner 114SD
- 2020 Freightliner 114SD
- 2021 Freightliner 114SD
- 2018 Freightliner 122SD
- 2019 Freightliner 122SD
- 2020 Freightliner 122SD
- 2021 Freightliner 122SD
- 2018 Freightliner Business Class M2
- 2019 Freightliner Business Class M2
- 2020 Freightliner Business Class M2
- 2021 Freightliner Business Class M2
- 2018 Freightliner Cascadia
- 2019 Freightliner Cascadia
- 2020 Freightliner Cascadia
- 2021 Freightliner Cascadia
- 2018 Western Star 4700
- 2019 Western Star 4700
- 2020 Western Star 4700
- 2021 Western Star 4700
- 2018 Western Star 4800
- 2019 Western Star 4800
- 2020 Western Star 4800
- 2021 Western Star 4800
- 2018 Western Star 4900
- 2019 Western Star 4900
- 2020 Western Star 4900
- 2021 Western Star 4900
- 2018 Western Star 5700
- 2019 Western Star 5700
- 2020 Western Star 5700
- 2021 Western Star 5700
- 2018 Western Star 6900
- 2019 Western Star 6900
- 2020 Western Star 6900
- 2021 Western Star 6900
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.