Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve
Peterbilt technical service bulletin 21 PBK for 2019-2021 Peterbilt 520.
- Bulletin number
- 21 PBK
- Component
- Service brakes, air
- Summary
- Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve. The absence of this valve could affect rear brake timing on certain vehicles equipped with a tri-drive or liftable tag axle and Dual Seated or Right Hand Stand-Up steering configurations. Vehicles will be inspected and, if necessary, a QR valve will be installed.
Owners of these vehicles have filed 4 complaints in the brakes category.
Vehicles covered
- Peterbilt 520 2019-2021 201920202021
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