Service bulletin 21 PBK
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10201947 |
| Published by NHTSA | 2021-10-05 |
| Manufacturer's number | 21 PBK |
| Manufacturer's date | 2021-09-23 |
| NHTSA component | SERVICE BRAKES, AIR |
NHTSA's 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.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Brakes
| PETERBILT 520 | 2019, 2020, 2021 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V720000 | 2021-09-16. SERVICE BRAKES, AIR |
|---|---|
| 20V132000 | 2020-03-04. SERVICE BRAKES, AIR |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| 13-060 | 2022-09-06. Service bulletin. The service information for Bendix Air Dryer maintenance is being updated to include new procedures. |
|---|---|
| 20 PBF | 2021-01-06. Service bulletin. Safety Recall: Interim Dealer Notification - Peterbilt has decided that a condition affecting vehicle stability may exist in certain Model 520 vehicles built from 9/26/2019 through 7/22/2020 with stability control and a spring brake modulator valve (SBM) or lift axle. The Stability Control Relay may have been plumbed incorrectly, which could cause a stability event that may actuate the lift axle brakes or modulate the park brake chambers, which could destabilize the vehicle. This bulletin will be updated as soon as an affected chassis list is defined and a repair procedure is developed. |
| 13-055 | 2020-11-05. Service bulletin. Fix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles built between January 01, 2017 and July 06, 2020. Torsional vibration may stress the currently-installed brackets and cause them to fail near the bottom of the frame rail. |
| 13-054 | 2020-08-05. Service bulletin. Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking |
| 20PBB | 2020-04-03. Service bulletin. Safety Recall: Peterbilt has decided that certain Model 320 and 520 trucks built between 2/20/2015 and 7/16/2019 may have been built without a quick release 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. Resolutoin is to inspect for a quick release valve installed, and if there is not one, to install a quick release valve. |