Recall 20KWD WABCO 6S/6M ABS Brake System – 2016-2021 Kenworth T680

SEOCONTENT-START

Service Department
Kenworth Truck Company
P.O. Box 1000
Kirkland, Washington 98083-1000
(425) 828-5000
IMPORTANT SAFETY RECALL
Subject: Safety Recall 20KWD – T680 6S/6M ABS Brake System
NHTSA Recall number 20V-593
EXPIRATION DATE: NONE
Dear Kenworth Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Kenworth Truck Company has decided that a defect, which relates to motor vehicle safety, exists in certain model year 2016-2021 T680
vehicles manufactured from 03/02/2015 through 02/27/2020 equipped with 6S/6M ABS brake system with drum brakes. The brake
systems were manufactured with standard rear-brake ABS modulator valves instead of quick release valves, which may exceed the
intended service-brake release timing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety
Standard number 121, “Air Brake Systems.” This results in longer than expected service-brake release timing, which may lengthen
vehicle stopping distance, increasing the risk of a crash.
The problem is… Incorrect ABS modulator valve is installed.
What your dealer will do… Dealers will install the correct ABS modulator valve.
What you must do … Contact your Kenworth Dealer to schedule an appointment for repair.
Kenworth has initiated a recall to remedy the defect. Please contact your Kenworth dealer. To find your Kenworth dealer, please visit
Dealer Locator at www.Kenworth.com. This repair may take up to 2.0 hours of labor depending on vehicle configuration and dealer
scheduling. This repair will be performed at no charge to you.
If you had this repair performed before you received this letter, you may be eligible to receive reimbursement for the cost of obtaining a
pre-notification remedy of the problem associated with this recall. Receipts for parts and/or labor are required for consideration of
reimbursement.
If you require further information about this campaign, reimbursement of a pre-notification remedy associated with this recall, or
experience any difficulty in making arrangements for this repair, please contact Kenworth Customer Service, provide your name, your
dealer’s city and state, your phone number, your email address (optional), the last 8 digits of your VIN, the bulletin number, and your
question, using one of the following:
Email: Kenworth.Campaigns@paccar.com with the bulletin number in the subject line
or
Mail: Kenworth Truck Company, P.O. Box 1000, Kirkland, WA 98083-1000, Attn: Customer Service Department
or
Phone: 425-828-5888
If you conclude that Kenworth Truck Company has not enabled you to remedy this defect in 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 https://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 regret any inconvenience that this work may cause you and appreciate your cooperation in this matter.
Thank you,
Annick Hollingsworth
Director of Service Platforms
Kenworth Truck Company
10
(425) 828-5888
This notice applies to your vehicle; VIN:
November 25, 2020

*********************************************************************************************************

Federal Recall Information
eportal.paccar.net/dealer/uskw/en/warranty/truck/fedrecall/Pages/20KWD.aspx
20KWD
Supplier
Kenworth Truck Company
Description
Recall 20KWD T680 6S/6M ABS Brake System
Release Date
10/6/2020
Introduction
Certain T680 vehicles with 6S/6M ABS brake systems and drum brakes may have been
manufactured with standard, rear brake, ABS modulator valves instead of quick release,
rear brake, ABS modulator valves. This may cause the vehicles to exceed service brake
release timing performance requirements, increasing the risk of a crash. These vehicles fail
to comply with FMVSS 121, section S5.3.4 Brake Release Time.
Revision Notes
11/12/2020: Bulletin updated with repair and claim filing instructions.
Situation
1436 (1416 U.S. and 20 Canada) T680 chassis model year 2016-2021 built from 03/02/2015
through 02/27/2020 equipped with WABCO 6S/6M ABS brake system.
1/4
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. Kenworth will pay for parts at dealer net plus
applicable mark-up and labor:
2.0 hours labor to replace the ABS modulator valves. File a long form claim.
Time beyond 2.0 hours must be explained in the claim. A quick claim for standard
labor must be filed first.
Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is paid
PRWS CLAIM CODING
Campaign Code: 20KWD Campaign Type Safety
Recall
Claim Category: Truck Repair Type Proactive
Customer Concern
Code
172 Causal Code A1
Corrective Action
Code
12 Responsibility
Code:
Camp
Failure Location 013-011-071 Causal Part S472-195-
052-0
SRT Code 013-209
1.0 hrs.
Replace ABS mod valve (claim
twice2)
Supplier Code N/A
2/4
DWC CLAIM CODING
Failure
Location:
013-011-071 Work
Accomplished:
35
Failure Type: 470 Responsibility
Code:
01
SRT Code: 013-209
1.0 hrs.
Replace ABS mod valve (claim
twice2)
Claim Type: C
Campaign Field: 20KWD
Parts
Parts are available from PACCAR Parts.
Only order fittings and tubing as needed for repair. Fittings and tubing are suspension
dependent.
Quantity Part Number Description
2 S472-195-098-0 MODULATOR-VALVE WITH QR
1 Source Locally Loctite 567
4 FG4457 FTG-J844 STR MALE
AG400L or AG380 rear suspension
4 G38-1022-0808 FTG-45 DEG ELBOW MALE NPT TO J2494
AG400 or AG460 rear suspension
3/4
As Required Source Locally TUBING- NYLON AIR BRAKE #8 ORANGE
AG400 or AG460 rear suspension
As Required Source Locally TUBING- NYLON AIR BRAKE #10
ORANGE
AG400L or AG380 rear suspension
Quantity Part Number Description
Procedure
Please follow your dealership’s safety procedures and precautions to
ensure the vehicle can be safely repaired and maintained.
The figure below is provided for quick reference. The following diagram provides more
details and is available in Kenworth ServiceNet:
G95-1097, sheet 3
1. Remove the two relay valves.
2. Transfer the fittings from the removed relay valves to the new relay valves.
Use Loctite 567 or equivalent to seal the fitting threads
Torque the fittings to 15-22 lb-ft (20-30 Nm)
3. Install the new relay valves.
4. If compression fittings or tubing were damaged during removal of the relay valves,
replace them as appropriate.
Attachments
4/4

SEOCONTENT-END