Fuel Tubes May Crack and Leak Fuel – 2019-2022 Oshkosh S-Series

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A CUMMINS FIELD CAMPAIGN Please Deliver To: Service Managers and Warranty Decision Makers FROM: Cummins Global Warranty Administration Communications Subject: X12 CM2350 X119B and X12 CM2450 X137B Fuel Injector Supply Line Safety Campaign Number: C2532 Date: 10-Feb-2022 Expires: 01-Feb-2052 (U.S./Canada) 01-Feb-2052 (International) Attention: Worldwide distr./ branches and Div./Reg Offices U.S. / Canadian Distr./Branches and Div. Offices U.S. / Canadian Dealers (Automotive) If additional information is required, please contact your Cummins Warranty Operations Group Leader. DESCRIPTION: This Safety Campaign is being issued to address an issue on certain X12 CM2350 X119B and X12 CM2450 X137B units in which the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. Cummins has reported this issue to the U.S. National Highway Traffic Safety Administration (NHTSA), which has assigned it Recall Number 21E-099. NOTE: This field action provides retroactive coverage for repairs made in anticipation of and prior to the release of this publication. ACTION: In order to qualify for repair under this field action, an engine: 1 will be covered regardless of coverage status, and 2 must show as OPEN on QuickServe® Online for this field action. NOTE: The ESN list is attached for reference. After verifying that the engine meets the above requirements, perform the following actions: 1 Replace the fuel injector supply lines 4, 5, and 6 with new fuel lines and vibration isolators. Refer to Attachment B for detailed instructions to complete the repair. 2 If vibration isolators are already installed on injector supply lines 4, 5, and 6, no furthur action is needed. File a claim for admin ONLY and close the eligibility of the engine for C2532. 3 File one claim for the listed parts and required labor associated with this repair. MATERIAL DISPOSITION: Materials removed as a result of this field action must be scrapped. REIMBURSEMENTS: Parts: NOTE: Parts listed are OPTIONAL. Claim only the parts required to complete the repair. The following parts are covered under this field action: Part Number Quantity Description 631926700 1 KIT,TUBES AND ISOLATORS (OPT) NOTE: SRTs to gain access that are required to complete the repair, that are sufficiently explained in the claim narrative, may also be claimed on this action. NOTE: All SRTs listed are OPTIONAL. Select only the appropriate SRTs required to complete the repair. SRT 11-0GB EGR Crossover Tube – Remove and Install – X12 CM2350 X119B and SRT 11-13K EGR Crossover Tube – Remove and Install – X12 CM2450 X137B are NOT allowed to be claimed on this field action. Labor using applicable Access Code and Time: SRT Code Description Time 00-90X Administrative time 06-0GX Injector Supply Lines (High Pressure) – Remove and Install, First – X12 CM2350 X119B 06-0GZ Injector Supply Lines (High Pressure) – Remove and Install, Each Additional – X12 CM2350 X119B 06-0Z5 Injector Supply Lines (High Pressure) – Remove and Install, First – X12 CM2450 X137B 06-0Z6 Injector Supply Lines (High Pressure) – Remove and Install, Each Additional – X12 CM2450 X137B Travel: Travel is covered under this field action. Towing is covered under this field action. NOTE: Please schedule the Technicians time to maximize the number of units that can be repaired on a single visit. When filing claims for multiple ESNs, where travel or towing is required, travel or towing can be filed to ONLY one (1) ESN. Other Claimables: Consumables are not covered under this field action. Claim Instructions: For Cummins Dealers, claims for this Field Campaign must be filed via RAPIDSERVE™ Web (rsw.cummins.com). For information regarding RAPIDSERVE™ Web, please reference the “Warranty” tab in QuickServe® Online. If there are additional questions, please contact your local Cummins Distributor. Account Code: ………………………………………………………………………………………………………………………………………….. 65 Pay Code: ………………………………………………………………………………………………………….. North America Distributor = X Pay Code: ……………………………………………………………………………………………………………….. North America Dealer = D Pay Code: ………………………………………………………………………………………………………………. International Distributor = I Pay Code: ………………………………………………………………………………………………………………….. International Dealer = R Failure Code: ……………………………………………………………………………………………………………………………………. WFLISB Attachments c2532_esn-list.xlsxc2532_repair_instructions_attachment-b.pdf

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Oshkosh Corporation 2307 Oregon St., Oshkosh, WI 54902 • (920) 235-9150 February 2022 IMPORTANT SAFETY RECALL 22V-008 Dear Oshkosh Vehicle Owner: Ref: NHTSA Fuel Tubes May Crack and Leak fuel 22V-008 VIN: <<NOTE: Either insert VIN or reference attached VIN list>> This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Oshkosh has decided that a defect which relates to motor vehicle safety exists in your Oshkosh S-Series Front Discharge Mixer. These vehicles were built between 2018-2021. Why is a recall being conducted? Per the report filed by Cummins, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. What are we doing about the problem? Oshkosh is passing along information for Recall 21E-099 that was submitted by Cummins. Customers would need to schedule with an authorized Cummins dealer to perform this work. What should you do? • Contact Authorized Cummins dealer for repairs ! I M P O R T A N T ! ➢ Your Oshkosh vehicle is being recalled. ➢ Contact Oshkosh at 1-888-686-7278 for any questions. ➢ This recall repair will result in no cost to you. Oshkosh Corporation 2307 Oregon St., Oshkosh, WI 54902 • (920) 235-9150 What if you no longer own this vehicle? If you no longer own this vehicle, please contact Oshkosh at 1-888-686-7278 to assist us in updating our records. Who should you contact if you have further questions or concerns? If you have further questions, please contact Oshkosh at 1-888-686-7278 to allow us to assist you. If you have leased this vehicle to another person, federal regulations require you to send a copy of this notice to your lessee by first-class mail within ten days of your receipt of this notice. If Oshkosh fails or is unable to remedy this defect without charge and within a reasonable time, you may submit a written complaint to: The Administrator, National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE., 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. We apologize for any inconvenience this safety recall may cause, but your safety is our first concern. Sincerely, OSHKOSH CORPORATION

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-008 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Oshkosh Corporation Submission Date : JAN 11, 2022 NHTSA Recall No. : 22V-008 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Oshkosh Corporation Address : 2307 Oregon Street PO Box 2566 Oshkosh WI 54903-2566 Company phone : 920-235-9151 Population : Number of potentially involved : 1,687 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2022 Oshkosh S-Series Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : ALL Power Train : DIESEL Descriptive Information : This recall is based on information supplied by Cummins Inc. Cummins provided a list of their X12 engines supplied to Oshkosh that may be subject to a Cummins product recall. Production Dates : DEC 15, 2018 – DEC 30, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Per the report filed by Cummins, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Per the report filed by Cummins, a high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. Description of the Cause : Per the report filed by Cummins, the subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue failure resulting from a combination of vibration strain, assembly strain and material strength. Identification of Any Warning that can Occur : Per the report filed by Cummins, fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Part 573 Safety Recall Report 22V-008 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : Cummins, Inc Address : 301 Washington Street Box 3005, Mail Cod Columbus Indiana 47202 Country : United States Chronology : Dec 2021 – Oshkosh received communication from Cummins about recall 21E-099 for their X12 engines. Dec 2021 – Oshkosh identifies potentially affected population. Dec 2021 – Oshkosh quarantines internal vehicles in process. Jan 2022 – Oshkosh files recall notice to NHTSA. Description of Remedy : Description of Remedy Program : Cummins stated they are developing a remedy plan and will communicate it as soon as it is available, at no cost to customers. How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolators. The fuel tube and vibration isolator combination will have a new part number. Identify How/When Recall Condition was Corrected in Production : The injector alignment to the cylinder head was improved by implementing an improved alignment fixture during engine assembly and vibration isolators were added to the fuel tubes during engine assembly on November 2, 2021. Recall Schedule : Part 573 Safety Recall Report 22V-008 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : Notifications to customers will be made via a customer letter. The 577 customer letter will be mailed pending NHTSA approval Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : FEB 01, 2022 – MAR 04, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-008 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Oshkosh Corporation Submission Date : FEB 24, 2022 NHTSA Recall No. : 22V-008 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Oshkosh Corporation Address : 2307 Oregon Street PO Box 2566 Oshkosh WI 54903-2566 Company phone : 920-235-9151 Population : Number of potentially involved : 1,608 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2022 Oshkosh S-Series Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : ALL Power Train : DIESEL Descriptive Information : This recall is based on information supplied by Cummins Inc. Cummins provided a list of their X12 engines supplied to Oshkosh that may be subject to a Cummins product recall. Production Dates : DEC 15, 2018 – DEC 30, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Per the report filed by Cummins, the fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Per the report filed by Cummins, a high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. Description of the Cause : Per the report filed by Cummins, the subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue failure resulting from a combination of vibration strain, assembly strain and material strength. Identification of Any Warning that can Occur : Per the report filed by Cummins, fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Part 573 Safety Recall Report 22V-008 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : 5536516 Component Name 2 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : 5486389 Component Name 3 : Injector Fuel Supply Tube Component Description : Fuel tube between fuel rail and fuel injector Component Part Number : 3695190 Supplier Identification : Component Manufacturer Name : Cummins, Inc Address : 301 Washington Street Box 3005, Mail Cod Columbus Indiana 47202 Country : United States Chronology : Dec 2021 – Oshkosh received communication from Cummins about recall 21E-099 for their X12 engines. Dec 2021 – Oshkosh identifies potentially affected population. Dec 2021 – Oshkosh quarantines internal vehicles in process. Jan 2022 – Oshkosh files recall notice to NHTSA. Description of Remedy : Description of Remedy Program : Cummins stated they are developing a remedy plan and will communicate it as soon as it is available, at no cost to customers. Part 573 Safety Recall Report 22V-008 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolators. The fuel tube and vibration isolator combination will have a new part number. Identify How/When Recall Condition was Corrected in Production : The injector alignment to the cylinder head was improved by implementing an improved alignment fixture during engine assembly and vibration isolators were added to the fuel tubes during engine assembly on November 2, 2021. Recall Schedule : Description of Recall Schedule : Notifications to customers will be made via a customer letter. The 577 customer letter will be mailed pending NHTSA approval Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : FEB 24, 2022 – FEB 24, 2022 * NR – Not Reported

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