NHTSA ID Number: 10173210
Manufacturer Communication Number: 20PBB
TSB/Document Date: 2020-04-03
Summary
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.
IMPORTANT SAFETY RECALL
This notice applies to your vehicle. Your VIN(s) can be found on the bottom or back of this page.
Subject:
Safety Recall: 20PBB – Model 520 Dual Steer Quick Release
NHTSA: 20V132
EXPIRATION DATE: NONE
Dear Peterbilt Customer,
You are receiving this notice in accordance with the National Traffic and Motor Vehicle Safety Act.
Peterbilt has decided that a defect, which relates to motor vehicle safety, may exist in certain Model 520 and 320 vehicles manufactured
between 2/20/2015 and 7/16/2019. On certain trucks, a quick release valve may not have been installed. The absence of this valve could
affect rear brake timing and could increase the risk of a crash or injury. Your vehicle has been identified as being built within the date range
in which the quick release valve may not have been installed.
What is the problem?
A quick release valve that is required for proper brake timing may not have been installed.
What will your dealer do?
The brake plumbing will be inspected to see if the quick release valve was installed. If not, the
valve will be installed.
What should you do?
Contact your Peterbilt Dealer to schedule an appointment for repair.
Peterbilt Motors Company has initiated this recall to remedy the issue with no charge to you. Please contact your Peterbilt dealer to
schedule an appointment for these services. To find your Peterbilt dealer, please visit the Dealer Locator at www.Peterbilt.com or scan the
QR code. When contacting your Peterbilt dealer, reference the Safety Recall number and the NHTSA number. This repair may take up to
1.0 hour of labor depending on dealer scheduling.
If you had this repair performed before receiving this letter, you may be eligible to receive reimbursement for the cost of obtaining a prenotification remedy of the problem associated with this recall. Receipts for parts and/or labor are required for consideration of
reimbursement. Contact your local Peterbilt dealership for details.
If you require further information about this recall, or experience any difficulty in making arrangements for this repair, please contact:
Peterbilt Motors Company, 1700 Woodbrook St, Denton, TX 76205, Attn: Customer Services Department, phone 940-591-4220.
If you conclude that Peterbilt has not enabled you to remedy this defect in a reasonable time and without charge, you may submit a
complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, DC 20590, or call
the toll free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten
days. If you no longer own this vehicle, we would appreciate your advising us of the new owner if you know their name.
We apologize for any inconvenience this preventive procedure may cause and thank you for your participation in helping Peterbilt provide
the highest levels of customer satisfaction and service expertise. We value your business and appreciate your ongoing loyalty to Peterbilt
and its dealer network. Industry-leading quality, performance and reliability are hallmarks of Peterbilt products, and we thank you for
making Peterbilt your truck of choice.
Sincerely,
Michelle Ponsonby
Director of Customer Service
Peterbilt Motors Company
20PBB - Model 520/320 Dual Steer Quick Release
Page 1 of 6
Federal Recall Information
20PBB
Supplier
Peterbilt
Description
Model 320/520 Dual Steer Quick Release
Release Date
3/24/2020
Introduction
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.
Resolution
Safety Recall
Service all affected chassis that enter your dealership, even if the customer has no issue with the chassis.
Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is
on the list.
2. If you are not using Service Management to start repair orders, review SIR for “Complete” or "In Process" next to
the “20PBB” campaign code prior to performing this repair.
3. Follow the procedures below to inspect the brake plumbing and, if necessary, install the quick release valve.
1.
It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or
noncompliance has been corrected.
Warranty
There is no time or mileage limit for this recall. Peterbilt will pay for parts at dealer net plus applicable mark up and labor:
0.3 hours to inspect the brake plumbing to see if the quick release valve is installed. File Quick Claim 20PBBA.
This labor is for inspection only. It is not applicable for trucks that require the quick release valve installation.
0.4 hours to install the quick release valve and complete the necessary plumbing for Dual Seated Drive
configuration. File Quick Claim 20PBBB. This includes the inspection of the brake plumbing for the presence of the
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
4/1/2020
20PBB - Model 520/320 Dual Steer Quick Release
Page 2 of 6
quick release valve.
0.4 hours to install the quick release valve and complete the necessary plumbing for Right Hand Stand-Up
configuration. File Quick Claim 20PBBC. This includes the inspection of the brake plumbing for the presence of the
quick release valve.
File an additional claim for extraordinary circumstances, referencing 20PBB. A quick claim for standard labor must
be filed first.
For Field...
Enter...
Failure Location
013-010-008
Failure Type
705
Claim Type
C
Campaign Number
20PBB
SRT 013-183
Labor
0.3 hours to inspect the brake plumbing for the quick release
valve.
SRT 013-184
0.4 hours to install and plumb the quick release valve –
includes inspection for the presence of the valve.
Take-off parts disposition: Destroy parts 30 days after the claim has been paid.
Parts
Parts are available through PACCAR Parts.
DUAL SEATED DRIVE CONFIGURATION
Quantity
Part Number
Description
1
288251BXW
Quick Release Valve
2
K041-809-30
Hex Bolt
2
27-00801-005
Flat Washer
1
G38-1021-0608
90 Degree Male Fitting
1
G38-1023-0608
Straight Male Fitting
1
AP2335
3/8 IN Plug
1 foot
Source Locally
#8 Orange or Black Nylon
Brake Hose – 1 foot
As Needed
Source Locally
Teflon Tape
As Needed
Source Locally
RH STAND-UP CONFIGURATION
Quantity
Part Number
Description
1
288251BXW
Quick Release Valve
2
K041-809-30
Hex Bolt
2
27-00801-005
Flat Washer
2
G38-1023-0608
Straight Male Fitting
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
4/1/2020
20PBB - Model 520/320 Dual Steer Quick Release
Page 3 of 6
1
AP2335
3/8 IN Plug
1 foot
Source Locally
#8 Orange or Black Nylon
Brake Hose – 1 foot
As Needed
Source Locally
Teflon Tape
As Needed
Source Locally
Procedure
1.
Inspect the truck to see if the Quick Release (QR) valve is installed. If not installed as shown below, tilt the cab
forward for access and bolt the QR valve to the washer bottle housing.
Using the images below, determine the correct plumbing for the QR valve and locate the primary delivery hose
from the foot valve that will be routed to the QR valve.
3. Wrap the threads of the fittings with Teflon tape and install into the QR valve as shown for the appropriate steering
configuration below.
4. Remove the primary delivery hose from the foot valve, trim the excess if necessary and install in the outlet port of
the QR valve.
5. Cut a new section of hose to install from the QR valve inlet back to the foot valve.
2.
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
4/1/2020
20PBB - Model 520/320 Dual Steer Quick Release
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
Page 4 of 6
4/1/2020
20PBB - Model 520/320 Dual Steer Quick Release
6.
Page 5 of 6
Avoid kinking the hoses and secure the hose bundle with cable ties.
Attachments
Chassis List
Customer Letter – US
Customer Letter – Canada
Customer Letter – Canada (French)
Authored by: PR
Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed
through this system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly
confidential pursuant to the contract licensing such access. Disclosure, publication, release or distribution of any material found on
PACCAR systems to any person other than employees with a need to know such information is strictly prohibited. All activity on this
system is monitored. If PACCAR suspects or discovers any unauthorized activity, access may be immediately terminated without
prior notification. Violators may be subject to legal action.
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
4/1/2020
20PBB - Model 520/320 Dual Steer Quick Release
Page 6 of 6
© Copyright 2020 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns
about this page, please contact the DealerNet Webmaster.
https://eportal.paccar.com/dealer/uspb/en/warranty/truck/fedrecall/Pages/20PBB-Model520...
4/1/2020
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 20PBB
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- Stay Updated with Lifetime Access: This obd2 scanner includes lifetime free software updates for all app service functions. With a single payment, enjoy full access to diagnostics, reset tools, and maintenance features — zero subscription fees. A budget-friendly choice for weekend mechanics, home car owners, and DIYers, supporting vehicles from 1996 onward. Come to us with your VIN to check compatibility.
- Full Bidirectional Control/Active Tests & Stable Wireless Connectivity: This car code reader features full bidirectional control, allowing you to send commands to the vehicle's ECU for active tests on components such as fuel pumps, injectors, A/C clutches, windows, sunroofs, and more. This car scanner diagnostic tool helps DIYers quickly diagnose and test vehicle parts, cutting down troubleshooting and repair time. With BT 4.0 wireless connectivity, you can enjoy cable-free diagnostics up to 33 feet. Stand in your garage and test windows, wipers, or even engine components—all without needing to move around your car.
- Portable Car Scanner with 26 Special Functions: Scheduled vehicle maintenance with the A30M car diagnostic scanner can keep your vehicle in peak condition and save you big on dealership trips. The XTOOL A30M obd2 scanner diagnostic tool features essential reset and relearn functions, such as Oil Reset, EPB Reset (Electronic Parking Brake Release), SAS, ABS Brake Bleeding, Throttle Body Relearn, Injector Coding, Crank Sensor Relearn, Headlight Adjustment, and Tire Size Reset. Note: Service functions may vary by vehicle model – check compatibility beforehand!
- Wide Compatibility CAN FD & FCA
Autoauth: This obd2 scanner diagnostic tool is compatible with over 85+ car brands from the U.S., Europe, and Asia, providing extensive coverage through a BT connection with your smartphone or iPad. Now upgraded to support the latest protocols, it includes FCA AutoAuth access for Chrysler, Jeep, Dodge, and Fiat (2018+), and supports CAN FD for GM (2020+) models, giving you greater access to newer vehicles and systems. Note: The FCA AutoAuth account is not included with the device. Users must register and pay separately through the official FCA AutoAuth website to access diagnostic functions for vehicles that require it. - Up to 8 Live Data Streams Graphing – Real-Time Graphing for Deeper Insight: This car scanner supports up to 8 live data streams simultaneously with intuitive, real-time graphing. Gain comprehensive insights into your vehicle’s performance, making it easier to spot issues, detect trends, and make informed diagnostic decisions with confidence.
- Comprehensive OBD2 Scanner with 16 Resets: The XTOOL D5S car code reader and vehicle reset tool provides an advanced diagnostic solution with 16 commonly needed reset functions, including Electronic Parking Brake Reset (EPB Reset), SAS, BMS Reset (Battery Test), Throttle Body Relearn, TPMS Reset, ABS Bleeding, Injector Coding, Gearbox Match, Suspension Adjustment, Headlight, Window Initialization, Crank Sensor Relearn and more. Equipped with CAN FD Protocol and FAC AutoAuth, the D5S obd2 scanner diagnostic tool ensures compatibility with a broad range of modern vehicles, allowing users to address common maintenance needs quickly. NOTE: Please Check the Compatibility before ordering.
- 4 Main System Car Scanner & Full OBD2 Diagnostics: The XTOOL D5S car code reader is ideal for home mechanics, DIYers, and professionals, providing access to Transmission/Engine/ABS/SRS systems to read DTCs, Live data can be displayed in text or up to 4 PID data graphs, along with full OBD2 diagnostics to check the engine light on, other obd2 issues and routine maintenance. This car diagnostic scanner ensures you can keep your vehicles in top condition, avoiding costly repairs or unexpected breakdowns. NOTE: Some vehicles display three systems after connection because the transmission and engine of some vehicles are integrated into one.
- Check Engine Code Reader & Real-Time Engine Monitoring: Whether you're a car owner, a DIYer, or run a repair shop, the XTOOL D5S obd2 scanner diagnostic tool makes engine diagnostics fast and frustration-free, reading and explaining trouble codes in seconds—no confusion. Check live data like fuel trim, 02 sensor voltage, RPM, and coolant temp to pinpoint mis~fires, rough idle, or sensor issues. After repairs, simply use the D5S check engine code reader and reset tool to turn off the check engine light and confirm the problem’s fixed—saving time, money, and unnecessary shop visits. - Note: If the check engine light comes back on, it indicates the original problem still exists.
- Portable Car Scanner for ABS and SRS: XTOOL D5S gives you peace of mind when ABS or airbag warning lights come on. It reads and clears ABS codes to help you fix brake sensor, traction control, or wheel speed issues, and supports ABS bleeding after repairs like caliper or master cylinder replacement. For airbag systems, it scans and clears SRS codes related to airbags, seatbelt tensioners, and crash sensors. Whether you're doing repairs at home or running a small shop, the D5S is a cost-effective solution for safety diagnostics. Note: If a fault code returns after clearing, it usually means the issue hasn’t been fully resolved. Please check the compatibility before ordering.
- Transmission Warning Light ON? Here’s the Transmission Diagnostic and Reset Tool You Need: The XTOOL D5S is more than just a basic car scanner—it’s an easy-to-use transmission diagnostic tool. From rough shifts to slipping gears, the D5S lets you read and clear transmission trouble codes, monitor real-time TCM data, and perform transmission resets after fluid changes or repairs. Whether you’re a hands-on car owner or a pro running a busy shop, this OBD2 scanner with transmission functions helps you catch problems early—saving you time, money, and future headaches.. Note: Clearing fault codes is equivalent to a reset on some vehicles, but not all. For help, contact XTOOL Tech Support.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.