22KWF – Fuel Tank Leak – 2022-2023 Kenworth T680

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; Customer Service Department IMPORTANT SAFETY RECALL INFORMATION If 1(1 ~ ~ ,w:• ] ►f •; I ~~~~~~~ 6~~c k Company Kirkland, Washington 98083-1000 A PA«AR COMPANY (425) 825-5888 Issued in Accordance 0 With Federal Law U.S. O.partm•nt of Tronsporto11on IMPORTANT SAFETY RECALL Subject: Safety Recall 22KWF – T680 NextGen Split Fender Mudflap Fuel Tank Rub *N*H**T*S A www,nhm.gov First Class Mail US Postage PAID Seattle. WA Permit No. 2389 2 JJ m 0 )> rr z 0 –I 0 m October 3, 2022 IMPORTANT SAFETY RECALL INTERIM NOTIFICATION This notice applies to your vehicle; VIN: …._ ______ This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Subject: Safety Recall 22KWF – T680 NextGen Split Fender Mudflap Fuel Tank Rub NHTSA Recall number 22V582 Dear Kenworth Customer, &an this OR code to open the Kenworth Dealer Locator • • Kenworth Truck Company has decided that a defect which relates to motor vehicle safety exists in certain model year 2022-2023 T680 NextGen vehicles manufactured from 03/18/2021 through 06/15/2022, with short hood configuration and under cab fuel tank(s). On affected vehicles, the split fender mudflap may contact the fuel tank while the vehicle is in motion. Excessive wear of the fuel tank may allow fuel to spill on the roadway, which may increase the risk of a crash or injury. The driver may notice fuel leaking during a pre-trip inspection. Kenworth has initiated a recall to remedy the defect. No action is required at th is time. When parts are available, you will be notified and will be able to contact a Kenworth Dealer to have this repair performed. The problem is … What your dealer will do … What you must do … The split fender mudflap contacts the fuel tank while the vehicle is in motion, creating wear on the fuel tank over time When parts and procedures are available, Dealers will install or replace parts to correct the hazard. No action is required at this time. When parts and procedures are available, contact your Kenworth Dealer to schedule an appointment for repair 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 http://www.safercar.gov. Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of th is notice to the lessee within ten days. If you no longer own th is 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 th is matter. Thank you, A fl ,…-“”-μ u, ‘1/ ~twl-L_ Annick Hollingsworth Director of Service Platforms Kenworth Truck Company

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; Customer Service Department IMPORTANT SAFETY RECALL INFORMATION If 1(1 ~ ~ ,w:• ] ►f •; I ~~~~~~~ 6~~c k Company Kirkland, Washington 98083-1000 A PA«AR COMPANY (425) 825-5888 Issued in Accordance 0 With Federal Law U.S. O.partm•nt of Tronsporto11on IMPORTANT SAFETY RECALL Subject: Safety Recall 22KWF – T680 NextGen Split Fender Mudflap Fuel Tank Rub *N*H**T*S A www,nhm.gov First Class Mail US Postage PAID Seattle. WA Permit No. 2389 11 JJ m 0 )> rr z 0 –I 0 m January 31 , 2023 IMPORTANT SAFETY RECALL This notice applies to your vehicle; VIN: ——– This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Subject: Safety Recall 22KWF – T680 NextGen Split Fender Mudflap Fuel Tank Rub NHTSA Recall number 22V582 Dear Kenworth Customer, ~-la:.~[!] .~~, -. Kenworth Truck Company has decided that a defect which relates to motor vehicle safety exists in certain model year 2022-2023 T680 NextGen vehicles manufactured from 03/18/2021 through 06/15/2022, with short hood configuration and under cab fuel tank(s). On affected vehicles, the split fender mudflap may contact the fuel tank while the vehicle is in motion. Excessive wear of the fuel tank may allow fuel to leak onto the roadway, which may increase the risk of crash or injury. The driver may notice fuel leaking during a pre-trip inspection. 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 or scan the QR code at the top of this letter. Installation of anti-sail devices may take up to 1.0 hour of labor depending on vehicle configuration and dealer scheduling. If fuel tank replacement is necessary, parts lead time may be a minimum of 10 business days and repair time will increase to 4.0 hours. These repairs will be performed at no charge to you. The problem is … What your dealer will do … What you must do … The split fender mudflap contacts the fuel tank while the vehicle is in motion, creating wear on the fuel tank over time Dealers will install anti-sail devices on split-fender mudflaps and inspect the fuel tank for damage. If necessary, damaged fuel tank(s) will be replaced Contact your Kenworth Dealer to schedule an appointment for repair 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 http://www.safercar.gov. Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of th is notice to the lessee within ten days. If you no longer own th is 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 th is matter. Thank you, A,, ,.,,.e,k_ μ u, “1/~tFYIL._ Annick Hollingsworth Director of Service Platforms Kenworth Truck Company

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Recall 22KWF: T680 NextGen Split Fender Mudflap Fuel Tank Rub Number 22KWF / 22V582 / 2022-430 Supplier Kenworth Truck Company Description Recall 22KWF: T680 NextGen Split Fender Mudflap Fuel Tank Rub Date 9/19/2022 What’s New c? Edit L□ Clone Safety Recall – On Certain T680 NextGen chassis with short hood and under cab fuel tanks configuration, the split fender mudflap contacts the fuel tank (s) while the vehicle is in motion. This may cause the fuel tank to leak, increasing the risk of fire. Parts and procedures are now available. Introduction Kenworth Truck Company has determined that a defect, which relates to motor vehicle safety, exists in certain T680 NextGen chassis. On affected chassis, the split fender mudflap contacts the fuel tank while the vehicle is in motion, creating wear on the fuel tank over time. Excessive wear of the fuel tank may allow fuel to leak onto the roadway, which may increase the risk of fire. The driver may notice fuel leaking during a pre-trip inspection. Situation 592 (586 US and 6 CAN) Model Year 2022-2023 T680 NextGen Short Hood chassis built from 03/18/2021 through 06/15/2022 with split fender mudflaps and under-cab fuel tank(s). Refer to the attached chassis list. Resolution Safety Recall Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis. 1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list. 2. In Service Management, select Campaign 22KWF to add it to the case. If the unit is released back into service without performing the repair, make sure to also release the Campaign in Service Management. 3. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the 22KWF campaign code prior to performing this repair. 4. Follow the procedures to install anti-sail devices on the front mudflaps. Federal Law 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 markup and labor: • 0.4 hours labor to install mudflap anti-sail devices (both sides) and inspect Under Cab fuel tank(s) for damage. Use Quick Claim Code 22KWF. • If fuel tank and mudflap are damaged (see damage criteria in bulletin procedures section), file an additional long form claim for fuel tank replacement, priming fuel system, and replacement mudflaps (parts). Mudflap replacement labor is included in anti-sail panel installation. • File an additional claim for extraordinary circumstances. A quick claim for standard labor must be filed first. • File the cla im within 14 days in accordance with Warranty Policy CA009. PRWS CLAIM CODING Campaign 22KWF Campaign Type Safety Recall Code: Claim Truck Repair Type Proactive Category: Customer 140 Causal Code 49 Concern Code Corrective 14 Responsibility Camp Action Code: Code Failure 078- Causal Part 24X30WKWF Location 009-003 Supplier N/A SRT Code B02-008 Code 0.4 hrs Inspect fuel tank and install anti-sail devices per bulletin procedure. B44-004 2.0 hrs Fuel Tank R&R, (one) per bulletin procedure B44-005 0.3 hrs Prime fuel system per bulletin procedure Procedure Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained. I]] NOTE Please note that this recall only covers damage to the forward lower joint of the fuel tank caused by mudflap contact. Other damage to the fuel tank from impacts or other sources is not covered. 1. Clean the exterior of the fuel tank and inspect the forward lower area of the fuel tank. Left Hand Under Cab (LHUC) Fuel Tank Damage Location Right Hand Under Cab (RHUC) Fuel Tank I I I I I I I I I I I I I I I Damage Location Fuel tanks with damage that meets one or more of the following criteria should be replaced: []] NOTE Replacement of damaged fuel tanks will require a long form warranty claim to include the fuel tank and replacement labor. See Warranty section for more information. Fuel tanks may have a minimum 10 business day lead time. o Any fuel leak from the rubbed area, regardless of damage area size. o Rubbed area is 5 inches (127 mm) wide at the widest point. (See picture below) o Any gouges or deep scratches that are more than 1 mm deep (½ the original thickness of the fuel tank material) – measure using a tire tread depth gauge or similar tool. Mudflaps should be replaced if the damaged area creates a visible hole completely through the mudflap. o Obtain a new fuel tank and mudflap (if damaged) using the part number(s) listed in ECAT for the specific chassis. o Replace fuel tank. o Prime fuel system after new fuel tank installation. 2. Install anti-sail device on both front mudflaps (Left and Right side) III NOTE All affected chassis will have anti-sail devices installed, regardless of fuel tank damage. o Remove the cover PN A35-1017 for access to outboard mudflap fastener. o Remove 3 fasteners that hold mudflap and fastener plate to split fender frame. o Retain mudflap for reuse or use replacement mudflap if damaged. 0 Install anti-sail panel (PN A46-1181) between frame and mudflap Anti-sail device should be positioned on the rear side of the mudflap. o Reinstall mudflap and anti-sail plate using longer fasteners (PN R34-6002-08030SHLN) and washers (PN HWC12241) U~l HWC12U1 ( nllet) o Install cover PN A35-1017. Parts Parts are available from PACCAR Parts. Quantity Part Description Number 2 A46-1181 Anti-Sail Panel 6 R34-6002- M8x30 screw 08030SHLN 6 HWC12241 Washer The following parts are only required if the fuel tank and/or the mudflap meet the replacement criteria in the procedures section: Quantity Part Description Number 1 See ECAT Fuel Tank (if damaged) A46- 1 1133- Mudflap – Black (if damaged) 1924201 A46- 1 1133- Mudflap – White (if damaged) 1924101 Links Chassis List Interim Customer Letter Final Customer Letter Authored by: JB3 Revision History 01/18/2023: Updated risk wording to “risk of fire”. 1/13/2023: Converted interim bulletin into final recall. Parts and procedures are now available.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-582 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : PACCAR Incorporated Submission Date : AUG 04, 2022 NHTSA Recall No. : 22V-582 Manufacturer Recall No. : 22KWF Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 586 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2022-2023 Kenworth T680 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The population consists of vehicles in the field with a T680SH Next Gen split fender, a fuel tank located under the cab, and no anti-sail device to mitigate mud flap motion. Production Dates : MAR 18, 2021 – JUN 15, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The mud flap contacts the fuel tank while the vehicle is in motion, creating wear on the fuel tank over time. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : On affected vehicles, excessive wear of the fuel tank may allow fuel to spill on the roadway, which may increase the risk of a crash or injury. Description of the Cause : The mud flap can move to contact the fuel tank while the vehicle is in motion. The material of the mud flap is thermoplastic, which can damage the aluminum fuel tank over time. Other similar configurations use a different material for the mud flap on the split fender. Identification of Any Warning that can Occur : The driver may notice fuel leaking during a pre-trip inspection. Involved Components : Part 573 Safety Recall Report 22V-582 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : mud flap Component Description : mud flap Component Part Number : A46-1133 Supplier Identification : Component Manufacturer Name : PACCAR Address : 777 106th Ave NE Bellevue Washington 98004 Country : United States Chronology : 04-21-22: Report received from the field of a truck which experienced fuel tank leaks. Engineering reviewed issue with Safety & Compliance. 05-04-22: Engineering reviews concepts to restrict mud flap contact, and plans to select one to install on a Kenworth owned truck to evaluate effectiveness. 05-13-22: Review held with engineering to discuss the status. A prototype anti-sail device was installed on a Kenworth owned vehicle. This truck did not have an under cab fuel tank, but evidence of the mud flap contacting the aftertreatment box assembly was observed. The prototype restricted the movement of the mud flap to mitigate contact. 06-01-22: Kenworth begins installing anti-sail device on production vehicles. 06-10-22: Additional reports from the field of mud flap contacting fuel tank and creating wear. Vehicles reported lower mileage and time in service than the initial vehicle identified with the fuel leak. All other potentially affected vehicles have lower mileage than the initial vehicle identified with a fuel leak. 07-25-22: Reviewed summary of investigation with engineering and firmed affected population. 07-28-22: Safety committee meeting held. The committee concurs that a safety related defect exists and the affected population shall be recalled. Description of Remedy : Description of Remedy Program : Paccar will notify customers and dealers, and affected vehicles will have an anti-sail device installed to prevent the mud flap from contacting the fuel tank. The fuel tank will also be inspected for damage and replaced as needed. Owners who incurred costs to obtain a remedy for the problem addressed by the recall in advance of receiving notification may seek reimbursement through the process outlined in the general reimbursement plan on file. Part 573 Safety Recall Report 22V-582 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : The remedy component includes is a new part number for the anti-sail device that was not present on recalled vehicles. Identify How/When Recall Condition was Corrected in Production : Install an anti-sail device to prevent the mud flap from contacting the fuel tank. All vehicles manufactured after July 15, 2022 have the anti-sail device installed. Recall Schedule : Description of Recall Schedule : Customers will be notified within 60 days. Planned Dealer Notification Date : OCT 03, 2022 – OCT 03, 2022 Planned Owner Notification Date : OCT 03, 2022 – OCT 03, 2022 * NR – Not Reported

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