Power train
Kenworth technical service bulletin A003 for 2018-2021 Kenworth T880 and 2019-2021 Kenworth W990.
- Bulletin number
- A003
- Component
- Power train
- Summary
- PACCAR has determined that all Set Forward Front Axle (SFFA) models with the PACCAR 20K front steer axle and wide-based tires have the potential to experience a shimmy or shake in the front axle. Wide-based tires include any series tires with widths of 385 mm or higher. This is due a lack of friction in the current axle rotating components. Replacing the thrust roller bearing with a thrust washer assembly creates enough friction to eliminate the shimmy.
Vehicles covered
- Kenworth T880 2018-2021 2018201920202021
- Kenworth W990 2019-2021 201920202021
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