198P – Tire Pressure Regulation System Failure – 2024 Wilson DWH-750 Pacesetter Grain Trailer

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-618 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Wilson Trailer Company Submission Date : SEP 05, 2023 NHTSA Recall No. : 23V-618 Manufacturer Recall No. : 198P Manufacturer Information : Manufacturer Name : Wilson Trailer Company Address : 4400 S. Lewis Boulevard P.O. Box 6300 Sioux City IA 51106-6300 Company phone : 7122526500 Population : Number of potentially involved : 1 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2024-2024 WILSON DWH-750 Vehicle Type : TRAILERS Body Style : Power Train : NR Descriptive Information : Certain model year 2024 Wilson Trailer produced 1 DWH-750 Pacesetter Grain Trailer that was equipped with Holland’s Tire Pilot Plus system. Under certain circumstances, the Tire Pilot Plus system (TPP) tire pressure management system allows all 8 tires on the trailer to lose pressure. The condition exists on Tire Pilot Plus models with electronic control units that were first supplied to Wilson Trailer beginning on December 2022. TPP units that are controlled by a manual pressure adjustment feature are not impacted by the defect. Production Dates : JUL 21, 2023 – JUL 21, 2023 VIN Range 1 : Begin : 1W1K45037R2278048 End : 1W1K45037R2278048 Not sequential Description of Defect : Description of the Defect : Certain model year 2024 Wilson Trailer produced 1 DWH-750 Pacesetter Grain Trailer that was equipped with Holland’s Tire Pilot Plus system. This trailer was equipped with the TPP Electronic Regulator Control Unit Assembly tire pressure regulation system (TPRS) they are experiencing unintended loss of pressure of all 8 tires while traveling at speeds higher than 45 mph. This loss of pressure occurs only on Tire Pilot Plus – Electronic Regulator Unit Assembly that was launched by SAF-Holland in late 2022. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Reduced vehicle control and/or stability. Risk of tire tread separation and debris on the road, increasing the likelihood of a crash. Description of the Cause : The root cause of the defect is not known at this time. Part 573 Safety Recall Report 23V-618 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : This trailer is equipped with a warning light that notifies the driver when the pressure drops below 80 PSI. The function ot the warning light may be intermittent on the effected unit. Involved Components : Component Name 1 : SAF Holland Tire Pilot Plus Component Description : Tire Inflation System with electronic regulator assembly Component Part Number : 40500456 / 2116300001370 Supplier Identification : Component Manufacturer Name : SAF Holland Address : 1950 Industrial Blvd Muskegon Michigan 49442 Country : United States Chronology : August 28,2023 SAF Holland notified Wilson Trailer that they have discovered a safety issue, and filed a 573. Description of Remedy : Description of Remedy Program : 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 the customer directly for performing the prescribed repair. How Remedy Component Differs from Recalled Component : 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 : Permanent corrective action for production processes will follow the root cause determination. Recall Schedule : Part 573 Safety Recall Report 23V-618 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : An interim customer notification letter will, after NHTSA approval be mailed to the effected customer. The letter will include a SAF-Holland service bulletin advising the owner to disable their TPP system and then telling them how to do so. Once the root cause has been identified and permanent corrective action has been developed, a customer notification letter will be sent out, after NHTSA approval. Wilson Trailer intends to provide the interim notification to the effected party by September 6th, 2023. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : SEP 12, 2023 – NR * NR – Not Reported

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A Wilson H TRAILER 4400 S. Lewis Blvd . • P.O. Box 6300 • Sioux City, IA 51 I 06-6300 Phone 7 12-252-6500 • Tol l Free: 800-798-2002 • Fax: 712-252-6510 www.wi lsontraile r.com • e-m a il .sales@w il sontra iler.com IMPORTANT SAFETY RECALL Date: Customer Name Customer Address City, State, Zip Code Re: SAF-HOLLAND Safety Recall 23E-045; Wilson Trailer Company Recall 23V-618 This notice applies to your VIN: Dear Valued Customer, This notice is being sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Wilson Trailer, based on information from SAF-Holland, has decided that a defect, which relates to moto.r vehicle safety, exists in one 2024 DWH-750 Pacesetter Grain trailer equipped with Tire Pilot Plus (TPP) Tire Inflation System with an electronic regulator assembly. Trailers equipped with Tire Pilot Plus-Electronic Regulator Control Unit Assembly may experience unintended loss of pressure of all tires while traveling at speeds higher than 45 mph. This loss of pressure event only occurs on the TPP system with the electronic assembly that was launched by SAF-Holland in late 2022. What SAF-Holland will do for you: 1. SAF-Holland is currently developing a permanent remedy for this issue. 2. In the meantime, as an interim step we require that new trailers equipped with the TPP system immediately disable the system, using the attached service bulletin. Tire pressure will need to be monitored manually until the permanent correction is made. 3. SAF-Holland will provide customers with instructions and materials needed to disable the effected TPP system. This instruction is included herein and noted in the SAF-Holland publication XL-AA20125SB-en-US_REV dated 6/16/2023. 4. Individual kits (PN#48100817) to disable the TPP system can be ordered free of charge through SAF-Holland by contacting SAF-Holland Customer Service @ 800-876-3929 5. Customers will receive a second notification letter regarding the permanent corrective action when the root cause has been determined. SAF-Holland will pay appropriate costs. We regret any inconvenience that this situation may cause you. Wilson Trailer and SAF-Holland want to assure you that we are concerned about customer safety and your continued satisfaction with our products. Sincerely, Dan Grote T~ cal Claims Manager Wilson Trailer Company Since 18 90 A G o o d N a m e t 0 H a v e Behind The \1/TC logo and the phrase ~since 1890 .. .A Good /\lame to Have Behind Youl” are trademarks and registered trademarks of Wilson Trailer Company Y O U I™ ‘~•~~ (C, ~ 1m JJ lfll ~ 2 [) “‘, .» A’ ~ iu~e n~ TM (1 P) ~uTfl ffd O SAF-HOLLAND Group 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. !A WARNING! Figure 1 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. i:L·AA20 12518-en·US P.ev · · 2023-06 -13 · Amendin , nts and Eoor; Resewtsl · 0 SAF·HOLlAI ID, h,c., SAF·HO\.LAilD. HOUNlD, SA[; and logos a,e 1rad cr11Jrks of SAHIOLLA t!D SA, IAf·HOLLAIID GmLH, and SAf-\10 1.lAND, Inc. 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). Figure2 Figure 3 SAF-IIOLLAND Group Figure 4 , I VALVE STEM CAP I ..t ~ Figure 5 Figure 6 XL·A.420 12′.ilB -en-lJS Rev – · 2023 -06-1 J · Amandmcnl, and E110E Reiti YIXI · © SAF-HOLLJ,ND, Inc., SAf- -1\QLLAND, HOLI.AMD, IAF, rn •cl log<:>; ;;{e trad ema ,:s of IAf -HGlLAMD S.A., 5.~F-HOLLAND G1nlJH, and SAF -HOUAND, Inc. SAH ·IOLLAr~D Group 7. Remove the 90 degree push to connect fitting and install 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 trai ler 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: 11 trailer make ■ trailerVIN ■ trailer in-service date ■ both axle serial numbers 11 suspension serial number 11 date of repair 11 authorization number to SAF-HOLlANO 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. SAF–llOlV1ND US/\, Inc. – 088.396.6501 – Fax 800.356.3929 SAf·HOLLl,NO Ca11 ada Limited· 5195!73494 · Fax 800.565.7753 Western Can ada• GO,J.574.749 \ · Fax 604.5 74.024•1 SAF–f\0\1.AN\J Merica – 4-(52) 55.5362.3743 · Fax +{52) 55.5361.8743 wv:w.safhol!and.u5 Figure 7 ‘ – r@i/t[//ft!ttJ Group C ci z. :’5 Q 0 .!°2’

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