23PBK – Rear Lifting Bracket on Engine May Detach – 2024 Peterbilt 520

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-749 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : PACCAR Incorporated Submission Date : NOV 07, 2023 NHTSA Recall No. : 23V-749 Manufacturer Recall No. : 23PBK Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 9 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2024-2024 Peterbilt 520 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : The recall population is vehicles built with certain Cummins L9N engines identified to PACCAR, in conjunction with Cummins Recall 22E080. The number of vehicles equipped with these engines which are being recalled is 9. Production Dates : AUG 01, 2023 – SEP 14, 2023 VIN Range 1 : Begin : 3BPDX20X9RF116043 End : 3BPDX20X9RF118097 ✔ Not sequential Description of Defect : Description of the Defect : The studded flange cap screw may have been built with incorrect length leading to the screw bottoming out while installing the lifting bracket to the cylinder head on engines built with certain lifting bracket options (LA9241, LA 9242, LA 9353, LA 9805, and LA 9730). Reference Cummins recall 23E-080. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : As described in Cummins Recall 23E080, the rear lifting bracket may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. Description of the Cause : As described in Cummins Recall 23E080, the flanged studs that attach the rear lifting bracket to the cylinder head may have been 30mm long instead of 25mm long as required on the component drawing. This could allow the stud(s) to bottom out in the threaded hole(s) in the cylinder head, resulting in a lack of clamp load on the lifting bracket. Identification of Any Warning that can Occur : None. Part 573 Safety Recall Report 23V-749 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Hexagon Double Ended Flange Stud Component Description : Flanged Stud attaching rear lifting bracket to cyclinder head Component Part Number : 3944061 Supplier Identification : Component Manufacturer Name : Cummins Inc. Address : 500 Jackson Street Columbus Indiana 47201 Country : United States Chronology : 10-24-23: Peterbilt received notification from Cummins in an OEM Notification Letter. 10-25-23: Cummins notified Peterbilt Safety and Compliance that a NHTSA equipment recall (ID 23E-080) was filed for certain Cummins L9N engines that are equipped with lifting brackets with incorrect length flanged stud(s) that may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall. Cummins provided the list of engine serial numbers (ESN) that may be affected. PACCAR began to review the affected population provided by Cummins. 10-27-23: Peterbilt Safety and Compliance held a meeting with Cummins to discuss the scope of the recall and actions taken by Cummins. 10-31-23: Peterbilt Safety and Compliance presented investigation to Peterbilt Safety Committee and concluded with concurring with Cummins that safety related defect does exist. As of 10-31-23, PACCAR received 0 warranty claims and zero report(s) about trucks in the field that may be related between July 2023 and August 2023. Zero reports of deaths or injuries have been received. Part 573 Safety Recall Report 23V-749 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : As described in Cummins Recall 23E080, Inspect and replace, if required, the flanged stud in the rear lifting bracket arrangement with the correct length flanged stud. Peterbilt Safety and Compliance was informed that 3 vehicles out of the population have been inspected/repaired. Notification letters will be sent only to owners that have not yet received the repair. 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. How Remedy Component Differs from Recalled Component : The remedy component is shorter (by 5mm) than the incorrect flanged stud used on the rear lifting bracket. Identify How/When Recall Condition was Corrected in Production : Cummins attained clean point and sorted in house inventory. On September 16th, 2023, Cummins made corrections in production by using flanged studs with the correct length. Recall Schedule : Description of Recall Schedule : Owners will be notified within 60 days. Cummins began repairing vehicle in the field prior to the filing of this report. Planned Dealer Notification Date : JAN 07, 2024 – JAN 07, 2024 Planned Owner Notification Date : JAN 07, 2024 – JAN 07, 2024 * NR – Not Reported

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11/14/23, 2:25 PM Aftersales Service – Powertrain Service Bulletin https://paccarnet.sharepoint.com/sitepages/pwrtrnsvcbltin.aspx?ctx=eyJ3ZWJVcmwiOiJodHRwczovL3BhY2Nhc m5ldC5zaGFyZXBvaW50LmNvbS9z… 1/2   23PBK – Safety Recall Cummins L9N Rear Lift Bracket Stud Number 23PBK / 23V749 / C2735 Description Safety Recall Cummins L9N Rear Lift Bracket Stud Subject Safety Recall Cummins L9N Rear Lift Bracket Stud Date 11/14/2023 Introduction Cummins alerted Peterbilt to a defect which relates to motor vehicle safety in the 2024 Model 520 vehicles equipped with L9N engines. The rear lifting bracket may detach from the cylinder head while the engine is being 11/14/23, 2:25 PM Aftersales Service – Powertrain Service Bulletin https://paccarnet.sharepoint.com/sitepages/pwrtrnsvcbltin.aspx?ctx=eyJ3ZWJVcmwiOiJodHRwczovL3BhY2Nhc m5ldC5zaGFyZXBvaW50LmNvbS9z… 2/2 lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. Refer to Cummins Recall C2735 for repair information. Situation PB— 9 – 2024 Model 520 vehicles built from 08/01/2023 through 09/14/2023 equipped with Cummins L9N engines. 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. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the “C2735” Cummins campaign code prior to performing this repair. 3. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the C2735 campaign code prior to performing this repair. Follow the procedures in Cummins C2735 Safety Recall to replace the rear lift bracket stud. Go to Cummins QuickServe and refer to the Cummins Recall – C2735. Warranty Go to Cummins QuickServe and refer to the Cummins Recall – C2735. File warranty claims through the Cummins warranty system. SIR will indicate chassis involved in this recall with the designator of “C2735” in the campaign field. Procedure Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained. Please refer to Cummins QuickServe for repair procedure. Reference Cummins Recall C2735. Links 23PBK – Chassis List 23PBK – Customer Letter 23PBK – Repair Procedure

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*** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 23E-080 Cummins Campaign #C2735 Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com U.S Customer XXXX Street Address City, ST 12345-6789 L9N engine(s) eligible for Cummins Campaign # C2735 Engine Serial Number Vehicle Model Vehicle Identification Number (VIN) 99163021 520 3BPD 99162483 520 3BPD 99162527 520 3BPD 99162516 520 3BPD 99162505 520 3BPD 99162494 520 3BPD 99162539 520 3BPD 99163850 520 3BPD 99164541 520 3BPD Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 23E-080 Cummins Campaign #C2735 November 9, 2023 Dear Cummins Customer: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain L9N engines that were manufactured between August 1, 2023, and September 14, 2023. This notice applies to your L9N engine(s) listed in the enclosed engine table. WHY IS A RECALL BEING CONDUCTED? The subject engines may have been built with incorrect length flanged stud(s) attaching the rear lifting bracket to the cylinder head. The rear lifting bracket may detach from the cylinder head while the engine is being lifted, possibly causing the engine to swing or fall, potentially resulting in personal injury. WHAT ARE WE DOING ABOUT THE PROBLEM? Cummins has released field Safety Campaign #C2735 “L9N Rear Lifting Bracket Hardware Mounting Safety Campaign” to correct this condition by inspecting and replacing the flanged stud in the rear lifting bracket arrangement with the correct length flanged stud. Repair parts are currently available at Cummins Distributors and authorized Warranty Dealers. The repair will be completed free of charge (parts and labor) and most applications will require approximately 1.2 hours to complete. WHAT SHOULD YOU DO? Contact the nearest Cummins Distributor or authorized Warranty Dealer to arrange to have this campaign performed on your engine. The distributor or dealer will work with you to schedule the best date to complete this repair. In the meantime, Cummins advises there are no drivability concerns with the safety defect identified. Should an engine need repairs requiring the lifting of the engine, and/or the bracket is visibly loose, immediately seek repairs. Cummins Inc. Box 3005 Columbus, IN 47202-3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care.cummins.com If you have not registered your Cummins product, please complete the enclosed registration card or register your product at https://prodreg.cummins.com/prodreg/#/webform/contactInfo. If you are no longer the owner, please forward this notice to the new owner or provide the new owner’s contact information to Cummins at cummins.campaign.administration@cummins.com so that we can notify them of this recall. If you previously paid to have this recall performed on your vehicle, you may be eligible for reimbursement. Please contact Cummins Care at the number below for more information. Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied. WHO SHOULD YOU CONTACT IF YOU HAVE FURTHER QUESTIONS OR CONCERNS? If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800- CUMMINS (1-800-286-6467) or visit our website at care.cummins.com. If you have a complaint relative to this recall, you may report it to the following: Administrator National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 You may also call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. Cummins is taking this action in the interest of safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter. Sincerely, Campaign Administrator Cummins Inc.

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