Clutch Overheating May Cause Fire – 2011-2017 Kidron Refrigerated Truck Bodies

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-450 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : ST Engineering Hackney, Inc Submission Date : JUN 28, 2023 NHTSA Recall No. : 23V-450 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : ST Engineering Hackney, Inc Address : 911 West 5th Street PO Box 880 Washington NC 27889 Company phone : 252-946-6521 Population : Number of potentially involved : 243 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2011-2017 KIDRON REFRIGERATED BODIES Vehicle Type : Body Style : Power Train : NR Descriptive Information : The recall population was determined using the recall notices received from Carrier Transicold. The Carrier Transicold recall notice defines specific refrigeration unit serial numbers effected by the recall. The recall is limited to Supra models 950, 950MT, and 960. In recall 23E026, Carrier Transicold identified 15,046 units potentially affected. The recall letters received for the Kidron Pennsylvania and Kansas plants total 243 units. The Kidron units matched to the recall serial numbers range from 2011 thru 2017 model years. As of this 6/22/23 revision, Kidron has not received a notice regarding units produced in their Ohio facility. Kidron has reached out to Carrier and provided a listing of Kidron units produced with Supra 950,950MT and 960 units from 2011 thru 2020 model years. Kidron is also working with Carrier Transicold to identify unmatched serial numbers. Production Dates : MAR 30, 2011 – JUN 21, 2017 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : From 23E026 Carrier Corporation (Carrier) is recalling certain Carrier Transicold refrigeration units, Supra models 950, 950MT, and 960. The centrifugal clutch may overheat under certain conditions break apart. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : From 23E026 Clutch Overheating may Cause Fire – Hot components from the clutch assembly may fall onto nearby flammable materials, such as leaves or other debris, increasing the risk of a fire. Part 573 Safety Recall Report 23V-450 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Cause : From 23E026 At this point, Carrier is still investigating the cause of the reported clutch failure that prompted this reporting, although in engines a clutch or a belt may fail for all sorts of reasons not attributable to a defect. The sequence of events that can lead to a thermal event is described above. Identification of Any Warning that can Occur : From 23E026 First, a proper pre-trip inspection, which is required before every use, would likely lead to the discovery of problems with the powertrain system, clutch, and/or wear of the belts, so that this situation could be avoided. Second, regular and proper maintenance of the unit in accordance with Carrier’s prescribed preventive maintenance timeline may also lead to the discovery of conditions that could lead to clutch failure before a failure event occurs. Finally, when the alternator starts to fail to provide a certain level of volts as a consequence of impending clutch failure, and before overheating and total clutch failure, an alarm is triggered both audibly and visually in the cab that should alert the user of a problem and, if configured correctly, the alarm will shut down the unit before the overheating progresses to the point of failure. Involved Components : Component Name 1 : Clutch assembly Component Description : The centrifugal clutch transmits mechanical torque from the diesel engine to the drivetrain to allow rotation (through belts) of the compressor, standby motor and alternator Component Part Number : 50-01179-02 Supplier Identification : Component Manufacturer Name : Carrier Transicold Address : PO Box 4805 Carrier PArkway TR-20 Syracuse 13221 Country : NR Chronology : FROM 23E026 On January 3, 2023, a thermal incident involving a Supra 950MT unit owned by Sysco was reported to have occurred in New York. As reported, a fire in the unit resulted from clutch overheating and failure, leading to ignition of flammable materials, likely leaves or other debris that had collected in the unit and/or plastic components in the unit. Carrier immediately began investigating the incident, including sending Part 573 Safety Recall Report 23V-450 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 out an independent investigator and analyzing pieces of the unit in the lab. One crucial piece of information discovered is that a pre-trip inspection was not performed prior to this incident. Also, the system alarm protection (CNF16) that should have shut off the unit before the clutch totally failed was found to be disabled. Carrier’s internal investigation and analysis process involved its safety, engineering, compliance, and legal teams. After internal meetings of its Safety Council and discussing the incident with outside NHTSA counsel, it was determined on March 22, 2023, that the unique set of circumstances investigated could be a safety related defect reportable to NHTSA under Part 573. Carrier files this report on March 29, 2023. Kidron Chronology 5/31 – STEH purchasing NC receives recall letter for Montgomery PA production units ??? – Kansas recall letter received 6/2 – compile data all units refrigeration serial # 2006 thru current 6/6 – complete initial cross match Carrier serial # to Kidron unit \ VIN numbers 6/8 – Search for Carrier resource to ID missing serial number matches 6/8 contact NHTSA for clarification of STE Hackney recall responsibilities 6/12 – NHTSA confirms STE Hackney must file their own separate recall 6/12 – Contact Carrier for research on no match serial numbers 6/19 – Follow to Carrier for research on no match serial numbers 6/28 – Kidron submit recall with available information Part 573 Safety Recall Report 23V-450 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : FROM 23E026 – For units in the field, Carrier will replace the plastic panels at the bottom of each unit with a metal panel, in all units that were manufactured before the production change in 2020. A metal panel will prevent any fire from propagating, even if hot clutch debris falls onto the panel. In addition, Carrier will install a metal bracket/guard around the clutch to prevent hot clutch debris from reaching flammable materials. Carrier estimates that it will need 1-2 months to acquire the panels and brackets for this remedy. Once enough panels and brackets are in supply, Carrier will send out notice letters to owners and dealers instructing owners to bring in their units as soon as possible for these repairs. These repairs will be at no charge to the owner. In addition to these repairs on all field units with plastic bottom panels and no clutch guard, Carrier will conduct an formational campaign through owner notification letters, dealer letters, service bulletins, and technical instructions, that will cover the following areas: (1) reemphasizing the importance of the pre-trip inspection, which Carrier urges to be performed before every trip according to Carrier’s detailed instructions in the owner’s manual and other training materials; (2) reemphasizing the importance of following the prescribed preventative maintenance schedule; (3) clearing out all leaves and other debris in the bottom panels of the units on a regular basis; and (4) ensuring that the system alarm (CNF16) is fully enabled so that it will shut off the unit when slippage in the powertrain system is detected, which could lead to an overheat situation. KIDRON REMEDY Kidron will identify the purchaser of the original units by cross referencing the Carrier Transicold serial number to the unit VIN and will ensure that a copy of the recall notice and all subsequent Carrier Transicold communications are forwarded to the original purchaser. How Remedy Component Differs from Recalled Component : FROM 23E026 As described above, the remedy component will be a new metal panel that replaces the plastic (potentially flammable) panel at the bottom of the unit, and a new metal guard around the clutch that will prevent clutch debris from reaching flammable materials. In addition, Carrier’s related informational campaign will highlight for owners and dealers the importance of the pre-trip inspection, the regular maintenance check-ups, regularly cleaning out leaves and debris, and making sure the system alarm shut off feature is properly enabled. Identify How/When Recall Condition was Corrected in Production : FROM 23E026 – For those units produced currently, since 2020 metal panels have been installed below the clutch assembly, replacing the plastic panels used in prior models. Additionally, since 2020, a metal bracket/ guard has been installed to further prevent hot clutch debris from reaching flammable materials or debris Recall Schedule : Part 573 Safety Recall Report 23V-450 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : Kidron will begin sending the Carrier Transicold interim owner notification letter no later than July 7. The schedule for follow up notifications will be executed when received from Carrier Transicold. Planned Dealer Notification Date : JUL 07, 2023 – JUL 28, 2023 Planned Owner Notification Date : JUL 07, 2023 – JUL 28, 2023 * NR – Not Reported

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STE Hackney 911 W. Fifth Street P.O. Box 880 Washington, North Carolina 27889, USA Phone: 252.9+46.6521 Fax: 252.9758340 www.kidron.com IMPORTANT SAFETY NOTICE SAFETY RECALL 23V450 (STE Hackney) 23E026 (Carrier) Dear STE Hackney – Kidron customer, This notice is sent to you in accordance with the requirements of the National Traffic and Motor Safety Act. Carrier Transicold has identified that a defect which relates to motor vehicle safety exists in certain Supra 950/950MT and 960 refrigeration units and has issued recall 23E026 to notify manufacturers that received these units. A copy of the notice is attached. Our records indicate that the following Kidron truck bodies were supplied to you by STE Hackney with a Carrier Transicold unit identified in this recall (see Appendix A attached). Reason for this recall: The centrifugal clutch may overheat under certain conditions and break apart. Risk to motor vehicle safety: Hot components from the clutch assembly may fall onto nearby flammable materials, such as leaves or other debris, increasing the risk of a fire. Actions you should take: (1) pre-trip inspection, according to Carrier’s detailed instructions in the owner’s manual and other training materials; (2) follow the prescribed preventative maintenance schedule; (3) clear out all leaves and other debris in the bottom panels of the units on a regular basis; (4) ensure that the system alarm (CNF16) is fully enabled so that it will shut off the unit when slippage in the powertrain system is detected, which could lead to an overheat situation Remedy for the defect: For units in the field, Carrier will replace the plastic panels at the bottom of each unit with a metal panel, in all units that were manufactured before the production change in 2020. A metal panel will prevent any fire from propagating, even if hot clutch debris falls onto the panel. In addition, Carrier will install a metal bracket/guard around the clutch to prevent hot clutch debris from reaching flammable materials. Carrier estimates that it will need 1-2 months to acquire the panels and brackets for this remedy. Once enough panels and brackets are in supply, Carrier will send out notice letters to owners and dealers instructing owners to bring in their units as soon as possible for these repairs. These repairs will be at no charge to the owner. Kidron will forward this information as soon as available. Contact information: If you have any questions, please contact Mihai Serban, Warranty Manager 330-857-6810 and/or mserban@kidron.com If you do not own this vehicle: Our records indicate you were the original purchaser of the vehicle identified on the enclosed card. If you do not own this vehicle, please fill out the Authorization for Recall Service card and return to STE Hackney so you will not be contacted again regarding this recall. STE Hackney 911 W. Fifth Street P.O. Box 880 Washington, North Carolina 27889, USA Phone: 252.9+46.6521 Fax: 252.9758340 www.kidron.com If you need assistance: If you believe that STE Hackney has failed to perform this repair within a reasonable amount of time, or the existing condition was not remedied without charge, please contact STE Hackney 800-763-0700. You may also wish to submit a complaint to: Administrator National Highway Traffic Safety Administration, 1200 New Jersey Ave. S.E. Washington, D.C., 20590 Or call the toll-free Vehicle Safety Hot-Line at 1-888-327-4236 (TTY:1-800-424-9152) or go to www.safercar.gov Lessor Requirements: Federal regulations require that any vehicle lessor receiving this Recall notice must forward a copy of this notice to the lessee within ten days. Reimbursement Eligibility: If you have previously paid for repairs as a result of this issue, you may be entitled to recovery of those expenses. Contact Carrier Transicold for details. We request your prompt attention to the correction of this issue. Sincerely, Rosa Hernandez Director of Quality Assurance STE Hackney Issue: Rev. 01 7/6/23 STE Hackney 911 W. Fifth Street P.O. Box 880 Washington, North Carolina 27889, USA Phone: 252.9+46.6521 Fax: 252.9758340 www.kidron.com Appendix A – Unit Listing Name Address Carrier Serial number Kidron UnitV nINumber Customer (Sold to:) Customer PO # End User Ship To Ship To Address City State ZIP

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