Tire Pressure Regulation System Failure – 2022 STE Hackney Kidron Refrigerated Trailers

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-492 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : ST Engineering Hackney, Inc Submission Date : JUL 17, 2023 NHTSA Recall No. : 23V-492 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 : 33 Estimated percentage with defect : 75 % Vehicle Information : Vehicle 1 : 2022-2022 KIDRON REFRIGERATED BODIES Vehicle Type : Body Style : Power Train : NR Descriptive Information : The recall population was determined based on the manufacturing dates provided by SAF Holland inc. on the recall notices. In recall 23E-045 SAF Holland notified they sold models with defect to customers between 30NOV22 and 15JUN23. Kidron reviewed the Serial Numbers of the suspensions received on Purchase Orders from November 30, 2022 to June 16 2023. 33 SAF Holland suspension (Kidron part number K955011) were installed during this period of time. Production Dates : NOV 30, 2022 – JUN 16, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : From 23E-045 Trailers equipped with Tire Pilot Plus – Electronic Regulator Control Unit Assembly tire pressure regulation system (TPRS) may experience unintended loss of pressure of all 8 tires while traveling at speeds higher than 45 mph. This loss of pressure event occurs only on the Tire Pilot Plus – Electronic Regulator Control Unit Assembly that was launched by SAF-HOLLAND in late 2022. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : From 23E-045 Reduced vehicle control and/or stability. Risk of tire tread separation and debris on the road. Part 573 Safety Recall Report 23V-492 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Cause : From 23E-045 The root cause of the defect is not known at this time. Identification of Any Warning that can Occur : TPP is designed with a warning light that notifies the driver when the tire pressure drops below 80 PSI. The function of the warning light may be intermittent on effected units Involved Components : Component Name 1 : Tire Pilot Plus – Electronic Regulator Control Uni Component Description : Tire Pilot Plus product equipped with Electronic Regulator Control Unit Assembly tire pressure regulation system that utilize an electronic tire pressure control module. Component Part Number : NR Supplier Identification : Component Manufacturer Name : SAF HOLLAND Address : 1950 Industrial Blvd Muskegon Michigan 49443-0425 Country : United States Chronology : From 23E-045 SAF Holland received the first warranty claim reported a failure date of 27APR23. 11 additional warranty claims have been received for failures through 24MAY23. A separate report from one customer reported an additional 8 failures that were detected before the trailer went into service. On 02JUN23, SAF-HOLLAND determined that a safety defect exists. June 16 – ST Engineering Hackney received a preliminary notification about the issue. June 16- ST Engineering Hackney performed an internal campaign. June 23- ST Engineering Hackney identified some suspects suspensions were installed in trucks shipped to customers. July 12 – ST Engineering Hackney finished identifying serial numbers and customers. July 14 – ST Engineering Hackney filed their own separate recall. Part 573 Safety Recall Report 23V-492 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : From 23E-045 The interim corrective action is to disable the TPP system and for fleets to manage tire pressure manually. The final corrective action will not be known until the root cause has been determined. SAF-HOLLAND will pay appropriate costs. How Remedy Component Differs from Recalled Component : From 23E-045 The Interim corrective action will result in disconnected air supply hoses on all tires and at the ECU. Identify How/When Recall Condition was Corrected in Production : From 23E-045 Permanent corrective action for production processes will follow the root cause determination Recall Schedule : Description of Recall Schedule : A customer notification letter will, after NHTSA approval be mailed to all sold to customers. The letter will include a service bulletin provided by SAF Holland advising owners to disable their TPP System and telling them how to do so. From 23E-045 Once the root cause has been identified and permanent corrective action has been developed, a second customer letter will be sent out, after NHTSA approval. ST Engineering Hackney will notify the customers as soon this information is available. Planned Dealer Notification Date : JUL 24, 2023 – AUG 18, 2023 Planned Owner Notification Date : JUL 24, 2023 – AUG 18, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-492 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : ST Engineering Hackney, Inc Submission Date : JUL 20, 2023 NHTSA Recall No. : 23V-492 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 : 59 Estimated percentage with defect : 50 % Vehicle Information : Vehicle 1 : 2022-2022 KIDRON REFRIGERATED TRAILERS Vehicle Type : Body Style : Power Train : NR Descriptive Information : The recall population was determined based on the manufacturing dates provided by SAF Holland inc. on the recall notices. In recall 23E-045 SAF Holland notified they sold models with defect to customers between 30NOV22 and 15JUN23. Kidron reviewed the Serial Numbers of the suspensions received on Purchase Orders from November 30, 2022 to June 16 2023. 33 SAF Holland suspension (Kidron part number K955011) were installed during this period of time. Production Dates : SEP 01, 2022 – JUN 30, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : From 23E-045 Trailers equipped with Tire Pilot Plus – Electronic Regulator Control Unit Assembly tire pressure regulation system (TPRS) may experience unintended loss of pressure of all 8 tires while traveling at speeds higher than 45 mph. This loss of pressure event occurs only on the Tire Pilot Plus – Electronic Regulator Control Unit Assembly that was launched by SAF-HOLLAND in late 2022. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : From 23E-045 Reduced vehicle control and/or stability. Risk of tire tread separation and debris on the road. Part 573 Safety Recall Report 23V-492 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Cause : From 23E-045 The root cause of the defect is not known at this time. Identification of Any Warning that can Occur : TPP is designed with a warning light that notifies the driver when the tire pressure drops below 80 PSI. The function of the warning light may be intermittent on effected units Involved Components : Component Name 1 : Tire Pilot Plus – Electronic Regulator Control Uni Component Description : Tire Pilot Plus product equipped with Electronic Regulator Control Unit Assembly tire pressure regulation system that utilize an electronic tire pressure control module. Component Part Number : NR Supplier Identification : Component Manufacturer Name : SAF HOLLAND Address : 1950 Industrial Blvd Muskegon Michigan 49443-0425 Country : United States Chronology : From 23E-045 SAF Holland received the first warranty claim reported a failure date of 27APR23. 11 additional warranty claims have been received for failures through 24MAY23. A separate report from one customer reported an additional 8 failures that were detected before the trailer went into service. On 02JUN23, SAF-HOLLAND determined that a safety defect exists. June 16 – ST Engineering Hackney received a preliminary notification about the issue. June 16- ST Engineering Hackney performed an internal campaign. June 23- ST Engineering Hackney identified some suspects suspensions were installed in trucks shipped to customers. July 12 – ST Engineering Hackney finished identifying serial numbers and customers. July 14 – ST Engineering Hackney filed their own separate recall. Part 573 Safety Recall Report 23V-492 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : From 23E-045 The interim corrective action is to disable the TPP system and for fleets to manage tire pressure manually. The final corrective action will not be known until the root cause has been determined. SAF-HOLLAND will pay appropriate costs. How Remedy Component Differs from Recalled Component : From 23E-045 The Interim corrective action will result in disconnected air supply hoses on all tires and at the ECU. Identify How/When Recall Condition was Corrected in Production : From 23E-045 Permanent corrective action for production processes will follow the root cause determination Recall Schedule : Description of Recall Schedule : A customer notification letter will, after NHTSA approval be mailed to all sold to customers. The letter will include a service bulletin provided by SAF Holland advising owners to disable their TPP System and telling them how to do so. From 23E-045 Once the root cause has been identified and permanent corrective action has been developed, a second customer letter will be sent out, after NHTSA approval. ST Engineering Hackney will notify the customers as soon this information is available. Planned Dealer Notification Date : JUL 24, 2023 – AUG 18, 2023 Planned Owner Notification Date : JUL 24, 2023 – AUG 18, 2023 * NR – Not Reported

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XL-AA20125SB-en-US Rev – · 2023-06-14 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF, and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc. Service Bulletin – June 2023 SAF Tire Pilot Plus™ (TPP) Inflation System 1 Tire Pilot Plus Safety Concern Tire Pilot Plus (TPP) system produced on trailers after November 2022 with the electronic regulator assembly have been determined under specific conditions to slowly deflate the trailer tires. The following instructions provide the necessary information for identifying and disabling the Tire Pilot Plus system. It is required to disable the Tire Pilot Plus system until troubleshooting and root cause determination work is complete. Service repair kit SRK-951 (Part Number – 48100817) is available for this procedure and the parts within the kit are commercially available as shown below. The kit includes nine 1/4 NPT pipe plugs and eight valve stem caps. Tire Pilot Plus Inspection and Disable Process INSPECTION: 1. Check the trailer build date on the VIN tag. If it was manufactured November 2022 or later, the trailer could be in the target group, but needs to be confirmed to have the electronic regulator assembly installed. 2. Figure 1 illustrates the new electronic regulator that will need to be disabled. Location is on the front crossmember for a sliding suspension. 3. Before performing any maintenance on the trailer, set the parking brake and block the tires. Failure to set the parking brake and chock the tires prior to beginning maintenance could allow the vehicle movement which, if not avoided, could result in death or serious injury. Figure 1 TPP Inspection and Disable Process 2 XL-AA20125SB-en-US Rev – · 2023-06-14 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF, and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc. Figure 6 Figure 4 Figure 5 Figure 3 DISABLE: 1. If determined to have an electronic regulator assembly, isolate the trailer air tank from its air supply. Drain the air from the trailer air tank. 2. Loosen and remove the tire hoses by hand starting at the hubcap fitting (Figure 2). Tire hoses should be disposed. 3. Remove the tire hose fitting from the hubcap using a 15mm or 9/16″ deep well socket. (Figure 3). 4. Install a valve stem cap on the tire valve stem (Figure 4). 5. Install the 1/4 NPT pipe plug in the hubcaps. Install hand tight plus 2 turns or 25-30 lb-in (Figure 5). 6. Disconnect the air line from the PPV as illustrated (Figure 6). PIPE PLUG VALVE STEM CAP AIR LINE Figure 2 TPP Inspection and Disable Process XL-AA20125SB-en-US Rev – · 2023-06-14 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF, and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc. SAF-HOLLAND USA, Inc. · 888.396.6501 · Fax 800.356.3929 SAF-HOLLAND Canada Limited · 519.537.3494 · Fax 800.565.7753 Western Canada · 604.574.7491 · Fax 604.574.0244 SAF-HOLLAND Mexico · +(52) 55.5362.8743 · Fax +(52) 55.5362.8743 www.safholland.us 7. Remove the 90 degree push to connect fitting and install Figure 7 a 1/4″ pipe plug hand tight plus 2 turns or 25-30 lb-in as illustrated (Figure 7). 8. Reinstall the 90 degree push to connect fitting to the air line and coil up and secure the air line back to the slider subframe or another secured air line with zip ties. 9. Re-tighten the trailer air tank drain. 10. Verify steps 2 through 9 are completed per instructions. NOTE: DO NOT disconnect the electrical connection to the electronic regulator. Open electrical connectors will corrode, collect contamination and cause performance issues when the system is re-activated. For this procedure SAF-HOLLAND will reimburse 1/2 hour of labor per trailer. Once the procedure is done, you will need to supply: „ trailer make „ trailer VIN „ trailer in-service date „ both axle serial numbers „ suspension serial number „ date of repair „ authorization number to SAF-HOLLAND warranty at service@safholland.com for labor reimbursement. If other warrantable issues are found during the disabling of the TPP electronic regulator, a separate claim must be filed for those items. We apologize for any inconvenience this may have caused. SAF-HOLLAND is committed to serving our customers with quality products. Once a permanent corrective action is developed, further instructions will be available.

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