Alternator Cable Clamps Incorrectly Installed – 2019-2022 Oshkosh S-Series 2.0 Concrete Mixers

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1 SAFETY NOTICE Vehicle Safety Recall – Technical Service Bulletin PROMPT ACTION REQUIRED Attention: Subject: Models Affected: Model Year: Date: Oshkosh Product Owner Alternator and Hood Pump Cable Routing Oshkosh S-Series 2.0 Front Discharge Mixer 2019-2022 (VIN 788727 – 814106) June 2022 VSR-TSB-035 NHTSA Campaign Number: 22V-378 Purpose: A concern affecting safety exists in some Oshkosh S-Series 2.0 Front Discharge Mixers. Vehicles have been identified that have alternator cables routed that may rub against components and over time wear cable sleeve or insulation exposing cable wires. The defect may cause a thermal event if the positive alternator cable is worn and makes contact with the vehicle’s sub frame. This bulletin provides instruction on rerouting the alternator cables. Affected Vehicles: The affected vehicle population is Oshkosh S-Series 2.0 Front Discharge Mixers produced in 2018-2022. Units Affected: S-Series 2.0 Front Discharge Mixers within the following VIN range: 788727 – 814106 Please refer to the attached VIN list of affected vehicles. Perform the procedure to and make a warranty claim against only the vehicles on this VIN list. Time Completion: Complete the enclosed procedure for each affected vehicle. The time of accomplishment may vary due to a number of factors; however, the estimated time for inspection and cushion clip reorientation is 0.5 hours. Required Action: Review and verify your ownership of all affected serial numbers of Oshkosh vehicles. Oshkosh records indicate that you are the owner of one or more affected vehicles, a VIN List is enclosed. Please be reminded that it is a violation of Federal law for you to sell or lease the vehicles covered by this notification until this recall has been performed on these vehicles. Substantial civil penalties apply to violations of this law. Reimbursement of Costs: Affected vehicles shall be repaired using the customer’s own qualified service technicians – at no cost to the owner. The repair should take approximately 0.5 hour with reimbursement of 1.0 hour. Parts/Labor Reimbursement: In order to receive credit, claims are to be submitted through the normal warranty claim system. Claims must be received within 30 days of the repair. Claims must include the Oshkosh VIN of the vehicle, the customer asset number, and the number of this bulletin. 2 Contacts: If you have questions or need further information, please contact S-Series Service Support at 888-686-7278 Enclosures: Procedure VIN List of Affected Vehicles (review this list and perform this procedure only on the vehicles in this list) Reference Part Numbers [only required if inspection shows wear to cable(s)] Item Part Number Description Qty. 1 A000F361 CABLE, ALTERNATOR, NEGATIVE 1 2 A000F362 CABLE, ALTERNATOR, POSITIVE 1 SAFETY NOTICEPerform your company’s Lockout/Tagout procedure. If your company does not have a Lockout/Tagout procedure, follow OSHA 1910.147 and 1910.146 Confined Space as appropriate.SAFETY NOTICEUse appropriate Personal Protective Equipment (PPE) as required by your company. Procedure Preparation 1. Park truck on flat, level surface, engage parking brake, chock truck tires, and perform your company’s Lockout/Tagout procedure. If your company does not have a Lockout/Tagout procedure, follow OSHA 1910.147 and 1910.146 Confined Space as appropriate. 2. Battery Disconnect Switch The vehicle’s BATTERY DISCONNECT switch is located on the left-hand side of the battery box. Use the battery disconnect switch when performing any maintenance so the vehicle cannot accidentally be started. a. Turn the battery disconnect switch (Figure A, Item 1) counterclockwise so the hole on the switch aligns with the hole in the bracket (Figure A, Item 2). b. Install the safety lockout device ring (Figure B, Item 1) through the holes on the battery disconnect switch and the bracket. c. Install a padlock (Figure B, Item 2) onto the safety lockout device ring, lock it, and put the key in your pocket. If more than one person is working on the vehicle, each person must install his or her own padlock. Figure A D ANGERThis energy source hasUnauthorized removal ofthis lock/tag may resultin immediate discharge.Remarks:been LOCKED OUT! Figure B 1 2 1 2 3 Cable and Hose Inspection 3. Inspect alternator positive and negative cables for signs of wear to cable sleeve or insulation along front side edges of rear engine crossmember. See Figure 1. 4. If either cable shows signs of sleeve or insulation wear during inspection replace cable. If there are no signs of wear continue to Step 5 for updated cable routing and cushion clip positioning. Figure 1 Inspection Areas Engine Crossmember Cable Routing 5. Locate cushion clip securing engine alternator cables to engine mount. See Figure 2. 6. Loosen and remove 0.25-20 x 1.0 inch screw and lock nut securing cushion clip to engine mount. See Figure 2. 7. Rotate cushion clip removed in Step 6 180 degrees and reinstall on front side of engine mount. See Figure 2. 8. Reinstall 0.25-20 x 1.0 inch screw and lock nut to secure cushion clip to engine mount. See Figure 2. Final tighten cushion clip mounting hardware to 9 ft. lbs. Figure 2 Engine Mount Alternator Cables Front of Truck Before After Cushion Clip Cushion Clip Alternator Cables 4 9. Locate cushion clip securing engine alternator cables to rear engine crossmember. See Figure 3. 10. Loosen and remove 0.25-20 x 1.0 inch screw and lock nut securing cushion clip to rear engine crossmember. See Figure 3. Figure 3 Engine Crossmember Cushion Clip Alternator Cables Hood Lift Pump Hydraulic Reservoir 11. Rotate cushion clip removed in Step 10 180 degrees and reinstall on engine alternator cables. See Figure 4. 12. Reinstall 0.25-20 x 1.0 inch screw and lock nut to secure cushion clip to rear engine crossmember. See Figure 4. Final tighten cushion clip mounting hardware to 9 ft. lbs. Figure 4 Before After Cushion Clip 5 13. Make sure there is clearance between hood lift pump hydraulic line and engine alternator cables. See Figure 5. Adjust cushion clip and engine alternator cables as required to provide clearance. 14. Make sure there is clearance between bottom of engine crossmember and engine alternator cables. See Figure 5 and Figure 6. Adjust cushion clip and engine alternator cables as required to provide clearance. 15. Make sure hydraulic and fuel line bundle is securely zip tied to front engine crossmember. See Figure 5. Engine Crossmember Hydraulic and Fuel Line Bundle Figure 5 Clearance between Alternator Cables and Hydraulic Hose Zip Ties Hydraulic and Fuel Line Bundle Zip Ties Clearance between Alternator Cables and Crossmember Figure 6 Crossmember Edge Engine Crossmember 6 Continuous Improvement: The change included in this document is part of the McNeilus Continuous Improvement Process. McNeilus’s quality policy is providing customer satisfaction through innovative products, dedicated service, and a constant focus on continuous improvement. (888) 686-7278 www.streetsmartparts.com 16. Inspect hood lift pump cables and hoses for signs of wear. Replace any cable(s) and hose(s) that show signs of wear. See Figure 7. 17. Make sure hood lift pump cables and hoses are routed and secured correctly. See Figure 7. 18. Make sure their is clearance between hood lift pump positive cable and hydraulic tank return hose. See Figure 7. Figure 7 Zip Ties Hood Lift Pump Zip Ties Crossmember Cables Hoses Clearance 19. Remove lockout/tagout and tire chocks.

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Oshkosh Corporation 2307 Oregon St., Oshkosh, WI 54902 • (920) 235-9150 June 2022 IMPORTANT SAFETY RECALL 22V-378 Dear Oshkosh Vehicle Owner: Ref: NHTSA Alternator Clamps Incorrectly Installed 22V-378 VIN: <> 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 2018-2022. Why is a recall being conducted? A concern affecting safety exists in some Oshkosh S-Series Front Discharge Mixers. Vehicles have been identified that have alternator cables routed that may rub against components and over time wear cable sleeve or insulation exposing cable wires. The defect may cause a fire if the positive alternator cable is worn and makes contact with the vehicle’s sub frame. What are we doing about the problem? Oshkosh will provide customers with Instructions on how correctly position clamps to provide adequate clearance for alternator cables. Customers would purchase the parts, perform the repairs, and then file parts/labor reimbursement through normal warranty process. Customers can also contact their nearest Oshkosh/McNeilus Service Center to schedule this inspection/repair at no charge ! 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 should you do?  Repairs should take less than 0.5 hours but will be reimbursed for 1.0 hour.  Customers can also contact their nearest Oshkosh/McNeilus Service Center to schedule this inspection/repair at no charge 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-378 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Oshkosh Corporation Submission Date : JUN 24, 2022 NHTSA Recall No. : 22V-378 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 : 1,316 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2022 Oshkosh S-Series 2.0 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : ALL Power Train : DIESEL Descriptive Information : All Oshkosh S-Series 2.0 model mixers manufactured at the start of production in October 2018 through January 2022. Production Dates : OCT 19, 2018 – JAN 10, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Vehicles were manufactured with alternator hose clamps where the installation orientation could allow them to rub against vehicle components of a hydraulic fluid hose. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Over time, if the alternator hose clamps rub against the vehicle sub-frame or hydraulic fluid hoses, this may cause the protective sheath on the cables to chafe which may increase the risk of a thermal event or fire. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-378 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In late March 2022, Oshkosh was initially notified by a customer that it had experienced a thermal event with one of its trucks. Additional information was received in April 2022, and Oshkosh took steps to have the vehicle returned to it for inspection and review. Because the concrete located in the drum had hardened, this complicated the transportation of the vehicle to the Oshkosh facility. An assessment of the vehicle took place in April 2022 and observed that the clearance between the alternator cable wiring and the hydraulic hoses for the hood assembly did not appear to be sufficient and there was chafing of the cables. Oshkosh then inspected preproduction vehicles that had been produced before the vehicle involved in this incident but did not find any signs of wearing or chafing of the cables. In April 2022, Oshkosh updated its work instructions to clarify the proper orientation and positioning of the cable routing to ensure sufficient clearance between the alternator cable and hydraulic hose. On May 19, 2022, Oshkosh decided to conduct a safety recall for this issue. Description of Remedy : Description of Remedy Program : Oshkosh will provide customers with instructions on how to inspect wiring, reposition clamps and properly secure cables so they are physically isolated. Customers will perform the repairs and then file parts/labor reimbursement through normal warranty process. Customers can also choose to have an Oshkosh service center perform the repair work free of charge. How Remedy Component Differs from Recalled Component : The alternator cables will be physically isolated so that they can no longer potentially come into contact with components. Identify How/When Recall Condition was Corrected in Production : In April 2022, changes were made to the work instructions for the orientation of the cable routing and clamps to ensure proper clearance between the alternator cable and hydraulic hose. Part 573 Safety Recall Report 22V-378 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 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. Oshkosh does not distribute vehicles through dealers. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : JUN 23, 2022 – JUN 23, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-378 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Oshkosh Corporation Submission Date : MAY 26, 2022 NHTSA Recall No. : 22V-378 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 : 1,316 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2022 Oshkosh S-Series 2.0 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : ALL Power Train : DIESEL Descriptive Information : All Oshkosh S-Series 2.0 model mixers manufactured at the start of production in October 2018 through January 2022. Production Dates : OCT 19, 2018 – JAN 10, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Vehicles were manufactured with alternator hose clamps where the installation orientation could allow them to rub against vehicle components of a hydraulic fluid hose. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Over time, if the alternator hose clamps rub against the vehicle sub-frame or hydraulic fluid hoses, this may cause the protective sheath on the cables to chafe which may increase the risk of a thermal event or fire. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-378 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In late March 2022, Oshkosh was initially notified by a customer that it had experienced a thermal event with one of its trucks. Additional information was received in April 2022, and Oshkosh took steps to have the vehicle returned to it for inspection and review. Because the concrete located in the drum had hardened, this complicated the transportation of the vehicle to the Oshkosh facility. An assessment of the vehicle took place in April 2022 and observed that the clearance between the alternator cable wiring and the hydraulic hoses for the hood assembly did not appear to be sufficient and there was chafing of the cables. Oshkosh then inspected preproduction vehicles that had been produced before the vehicle involved in this incident but did not find any signs of wearing or chafing of the cables. In April 2022, Oshkosh updated its work instructions to clarify the proper orientation and positioning of the cable routing to ensure sufficient clearance between the alternator cable and hydraulic hose. On May 19, 2022, Oshkosh decided to conduct a safety recall for this issue. Description of Remedy : Description of Remedy Program : Oshkosh will provide customers with instructions on how to inspect wiring, reposition clamps and properly secure cables so they are physically isolated. Customers will perform the repairs and then file parts/labor reimbursement through normal warranty process. Customers can also choose to have an Oshkosh service center perform the repair work free of charge. How Remedy Component Differs from Recalled Component : The alternator cables will be physically isolated so that they can no longer potentially come into contact with components. Identify How/When Recall Condition was Corrected in Production : In April 2022, changes were made to the work instructions for the orientation of the cable routing and clamps to ensure proper clearance between the alternator cable and hydraulic hose. Part 573 Safety Recall Report 22V-378 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 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. Oshkosh does not distribute vehicles through dealers. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : JUN 17, 2022 – JUN 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-378 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Oshkosh Corporation Submission Date : SEP 14, 2022 NHTSA Recall No. : 22V-378 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 : 1,316 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2022 Oshkosh S-Series 2.0 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : ALL Power Train : DIESEL Descriptive Information : All Oshkosh S-Series 2.0 model mixers manufactured at the start of production in October 2018 through January 2022. Production Dates : OCT 19, 2018 – JAN 10, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Vehicles were manufactured with alternator hose clamps where the installation orientation could allow them to rub against vehicle components of a hydraulic fluid hose. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Over time, if the alternator hose clamps rub against the vehicle sub-frame or hydraulic fluid hoses, this may cause the protective sheath on the cables to chafe which may increase the risk of a thermal event or fire. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-378 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Alternator Clamp Component Description : cable clamp Component Part Number : A000C602 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In late March 2022, Oshkosh was initially notified by a customer that it had experienced a thermal event with one of its trucks. Additional information was received in April 2022, and Oshkosh took steps to have the vehicle returned to it for inspection and review. Because the concrete located in the drum had hardened, this complicated the transportation of the vehicle to the Oshkosh facility. An assessment of the vehicle took place in April 2022 and observed that the clearance between the alternator cable wiring and the hydraulic hoses for the hood assembly did not appear to be sufficient and there was chafing of the cables. Oshkosh then inspected preproduction vehicles that had been produced before the vehicle involved in this incident but did not find any signs of wearing or chafing of the cables. In April 2022, Oshkosh updated its work instructions to clarify the proper orientation and positioning of the cable routing to ensure sufficient clearance between the alternator cable and hydraulic hose. On May 19, 2022, Oshkosh decided to conduct a safety recall for this issue. Description of Remedy : Description of Remedy Program : Oshkosh will provide customers with instructions on how to inspect wiring, reposition clamps and properly secure cables so they are physically isolated. Customers will perform the repairs and then file parts/labor reimbursement through normal warranty process. Customers can also choose to have an Oshkosh service center perform the repair work free of charge. How Remedy Component Differs from Recalled Component : The alternator cables will be physically isolated so that they can no longer potentially come into contact with components. Identify How/When Recall Condition was Corrected in Production : In April 2022, changes were made to the work instructions for the orientation of the cable routing and clamps to ensure proper clearance between the alternator cable and hydraulic hose. Part 573 Safety Recall Report 22V-378 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 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. Oshkosh does not distribute vehicles through dealers. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : JUN 23, 2022 – JUN 23, 2022 * NR – Not Reported

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