Brake Line Routing May Cause Brake Fluid Leak – Arrow 2019-2021 Ram 4500 & 5500 Cab Chassis

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LiquidSpring® LLC 4899 E. 400 SOUTH LAFAYETTE, IN 47905 PH: 765-474-7816, FAX: 765-474-7826 www.liquidspring.com 1 Important Safety Recall NHTSA Recall Number: 20E031 Date: May 13, 2020 Subject: RAM Rear Brake Caliper Flexible Line Modification Safety Recall Notice Dear LiquidSpring Suspension Owner, This notice is being sent to you in accordance with the requirements of the National Highway Traffic and Motor Vehicle Safety Act. LiquidSpring LLC has determined that a defect which relates to motor vehicle safety exists in a component of certain LS suspension systems installed on 2019-20 model year RAM 4500/5500 cab chassis, and only suspension systems installed on the above chassis are included in the safety recall. These suspension systems are typically installed on ambulances and other specialty vehicles. The affected system component is the rear brake caliper flexible line. The routing of the rear brake caliper flexible lines during the installation of the suspension kit may be causing brake caliper flexible line wear due to contact with a suspension component(s). Continued vehicle use with the rear brake caliper flexible line contacting suspension a component(s) may result in partial or complete loss of rear service brakes which could cause damage to the chassis and/or other vehicles, and possibly result in a crash. You are receiving this notice because records indicate that you may have purchased a vehicle equipped with an affected LS suspension system. LiquidSpring recommends that vehicle operator(s) be aware of any abnormal brake pedal feedback or reduced braking ability and that the rear brake caliper flexible lines should be inspected for any leakage. If any wear is found on the rear brake caliper flexible lines (not the protective spiral wrap), do not drive the vehicle. The affected suspension systems have a serial number range 2007563 – 2013191. The suspension system serial number may be found on the serial number plate located on the driver side front frame hanger of the suspension. See Figures 2 & 3 for the location and view of the serial number plate. LiquidSpring® LLC 4899 E. 400 SOUTH LAFAYETTE, IN 47905 PH: 765-474-7816, FAX: 765-474-7826 www.liquidspring.com 2 Figure 2. Serial Plate Location Figure 3. Serial Plate If you have a 2019-20 model year RAM 4500/5500 cab chassis equipped with a LiquidSpring suspension system within the above serial number range, please contact LiquidSpring to arrange service to have the rear brake caliper flexible lines inspected and modified to address the potential wear issue, free of charge. This repair will take about 1 hour to complete. The LiquidSpring contact information is as follows: Phone: 765-474-7816 Ext. 1 for Customer Service – 8:00 a.m. – 5:00 p.m. EDT Email: service@liquidspring.com If LiquidSpring fails or is unable to arrange service as described above without charge, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, DC 20590 or call toll-free Auto Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153); or go to www.safercar.gov. Commitment to safety, quality and respect for the customer are our highest priorities. Please accept our sincere apology for any inconveniences that may result from modifying the rear brake caliper flexible lines. Sincerely, Dean F. Bartolone – President/CEO

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-974 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Arrow Manufacturing, Inc. Submission Date : JUL 11, 2022 NHTSA Recall No. : 21V-974 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Arrow Manufacturing, Inc. Address : 801 S East St. Rock Rapids IA 51246 Company phone : 712-261-3157 Population : Number of potentially involved : 20 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2021 Ram 4500/5500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The recall population was determined based on the suspension kit serial numbers and conversion kits built and sold within the identified production dates. The recall affects all 2019+MY suspension kits and converted 2014-2018 MY converted suspension kits installed on 2019+ MY RAM 4500/5500 cab chassis. Suspension kits built for and installed on 2014-2018 MY RAM 4500/5500 cab chassis are not affected by the recall because the OEM rear brake caliper flexible line has sufficient length to provide clearance with suspension component(s). 2019+MY RAM 4500/5500 cab chassis OEM rear brake caliper flexible line is shorter than 2014-2018 MY RAM 4500/5500 cab chassis, thus caused potential contact with suspension component(s). Production Dates : MAY 01, 2018 – APR 22, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The rear brake caliper flexible line may have been routed such that it may be causing rear brake caliper flexible line wear due to contact with a suspension component(s). FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The consequence of the defect can be rear brake caliper flexible line wear Description of the Cause : NR Identification of Any Warning that can Occur : NR Part 573 Safety Recall Report 21V-974 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Brake Line Component Description : Rear Brake Caliper Flexible Line Component Part Number : NR Supplier Identification : Component Manufacturer Name : Liquid Spring LLC Address : 4899 E 400 South Lafayette Indiana 47905 Country : United States Chronology : 1st Reported Instance – December 12, 2019 – In the case of the 1st reported instance, a customer installing a RAM 4500/5000 rear suspension kit contacted LiquidSpring Customer Service to report contact between the driver side (LH) rear brake caliper flexible line and the lower axle clamp suspension component. Review of customer submitted pictures confirmed contact. Customer reworked the LH rear brake caliper flexible line routing to eliminate contact issue. There had been no other previously reported contact between the rear brake caliper flexible line and suspension component(s) from installers, dealers, or end users of the affected product. Chronology : February 10, 2020 – LiquidSpring contacted RAM dealer to obtain rear brake caliper flexible line P/N’s for MY 2018, 2019, and 2020 RAM 4500/5500 cab chassis. RAM dealer provided part number information for the rear brake caliper flexible line indicated that the P/N for MY 2019 and 2020 was the same but different from MY2018. Because physical information such as length of the line was not available for comparative purposes, LiquidSpring ordered both rear brake caliper flexible lines for MY 2018 and 2019/20. Only MY 2018 part was received, MY 2019/20 was backordered with delivery date indeterminate. February 14, 2020 – LiquidSpring began effort to develop banjo manifold block to install between the rear brake caliper and the rear brake caliper flexible line to re-orient the brake line banjo mount and provide an effective longer line length for clearance with the lower axle clamp suspension component. March 16, 2020 – LiquidSpring began effort to modify the lower axle clamp suspension component to provide clearance for the rear brake caliper flexible line without utilizing banjo manifold block. March 24, 2020 Trial installation of the developed banjo manifold block between the rear brake caliper and the rear brake caliper flexible line along with re-orientation of the brake line banjo mount. Part 573 Safety Recall Report 21V-974 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : A kit, P/N 11849, has been generated consisting of 2 OEM banjo bolts, 8 crush washers, 2 banjo blocks, and installation instructions to install the banjo blocks on each rear caliper and modify the rear brake caliper flexible line mounting. A kit, P/N 11871, has been generated with OEM replacement rear brake caliper flexible lines and hardware required to replace worn rear brake caliper flexible lines as needed. The company plans to cover all expenses related to the installation of the banjo blocks and/or replacement of worn rear brake caliper flexible lines How Remedy Component Differs from Recalled Component : The presence of the banjo blocks installed between the rear brake caliper from Recalled Component : and the rear brake caliper flexible line distinguishes vehicles that do or don’t have the remedy completed. Identify How/When Recall Condition was Corrected in Production : The ongoing production remedy for the rear brake caliper flexible line contact issue will be the modified lower axle clamp suspension component that provides clearance without utilizing the banjo manifold block. This change was implemented on all suspension kits shipped after April 22, 2020. Arrow installed the kits on (14) trucks still at the factory. (7) affected vehicles needed to be corrected in the field at end user locations. Recall Schedule : Description of Recall Schedule : Liquid Spring contacted (5) end users directly where product was already in the field on (7) total vehicles. A total of (21) vehicles were affected and the remaining (14) kits were installed at Arrow before the finished vehicles left the factory. Liquid spring has verified that all kits have been installed and all corrective actions have been completed. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-974 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Arrow Manufacturing, Inc. Submission Date : DEC 16, 2021 NHTSA Recall No. : 21V-974 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Arrow Manufacturing, Inc. Address : 801 S East St. Rock Rapids IA 51246 Company phone : 712-261-3157 Population : Number of potentially involved : 21 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2021 Ram 4500/5500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The recall population was determined based on the suspension kit serial numbers and conversion kits built and sold within the identified production dates. The recall affects all 2019+MY suspension kits and converted 2014-2018 MY converted suspension kits installed on 2019+ MY RAM 4500/5500 cab chassis. Suspension kits built for and installed on 2014-2018 MY RAM 4500/5500 cab chassis are not affected by the recall because the OEM rear brake caliper flexible line has sufficient length to provide clearance with suspension component(s). 2019+MY RAM 4500/5500 cab chassis OEM rear brake caliper flexible line is shorter than 2014-2018 MY RAM 4500/5500 cab chassis, thus caused potential contact with suspension component(s). Production Dates : MAY 01, 2018 – APR 22, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The rear brake caliper flexible line may have been routed such that it may be causing rear brake caliper flexible line wear due to contact with a suspension component(s). FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The consequence of the defect can be rear brake caliper flexible line wear Description of the Cause : NR Identification of Any Warning that can Occur : NR Part 573 Safety Recall Report 21V-974 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Brake Line Component Description : Rear Brake Caliper Flexible Line Component Part Number : NR Supplier Identification : Component Manufacturer Name : Liquid Spring LLC Address : 4899 E 400 South Lafayette Indiana 47905 Country : United States Chronology : 1st Reported Instance – December 12, 2019 – In the case of the 1st reported instance, a customer installing a RAM 4500/5000 rear suspension kit contacted LiquidSpring Customer Service to report contact between the driver side (LH) rear brake caliper flexible line and the lower axle clamp suspension component. Review of customer submitted pictures confirmed contact. Customer reworked the LH rear brake caliper flexible line routing to eliminate contact issue. There had been no other previously reported contact between the rear brake caliper flexible line and suspension component(s) from installers, dealers, or end users of the affected product. Chronology : February 10, 2020 – LiquidSpring contacted RAM dealer to obtain rear brake caliper flexible line P/N’s for MY 2018, 2019, and 2020 RAM 4500/5500 cab chassis. RAM dealer provided part number information for the rear brake caliper flexible line indicated that the P/N for MY 2019 and 2020 was the same but different from MY2018. Because physical information such as length of the line was not available for comparative purposes, LiquidSpring ordered both rear brake caliper flexible lines for MY 2018 and 2019/20. Only MY 2018 part was received, MY 2019/20 was backordered with delivery date indeterminate. February 14, 2020 – LiquidSpring began effort to develop banjo manifold block to install between the rear brake caliper and the rear brake caliper flexible line to re-orient the brake line banjo mount and provide an effective longer line length for clearance with the lower axle clamp suspension component. March 16, 2020 – LiquidSpring began effort to modify the lower axle clamp suspension component to provide clearance for the rear brake caliper flexible line without utilizing banjo manifold block. March 24, 2020 Trial installation of the developed banjo manifold block between the rear brake caliper and the rear brake caliper flexible line along with re-orientation of the brake line banjo mount. Part 573 Safety Recall Report 21V-974 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : A kit, P/N 11849, has been generated consisting of 2 OEM banjo bolts, 8 crush washers, 2 banjo blocks, and installation instructions to install the banjo blocks on each rear caliper and modify the rear brake caliper flexible line mounting. A kit, P/N 11871, has been generated with OEM replacement rear brake caliper flexible lines and hardware required to replace worn rear brake caliper flexible lines as needed. The company plans to cover all expenses related to the installation of the banjo blocks and/or replacement of worn rear brake caliper flexible lines How Remedy Component Differs from Recalled Component : The presence of the banjo blocks installed between the rear brake caliper from Recalled Component : and the rear brake caliper flexible line distinguishes vehicles that do or don’t have the remedy completed. Identify How/When Recall Condition was Corrected in Production : The ongoing production remedy for the rear brake caliper flexible line contact issue will be the modified lower axle clamp suspension component that provides clearance without utilizing the banjo manifold block. This change was implemented on all suspension kits shipped after April 22, 2020. Arrow installed the kits on (14) trucks still at the factory. (7) affected vehicles needed to be corrected in the field at end user locations. Recall Schedule : Description of Recall Schedule : Liquid Spring contacted (5) end users directly where product was already in the field on (7) total vehicles. A total of (21) vehicles were affected and the remaining (14) kits were installed at Arrow before the finished vehicles left the factory. Liquid spring has verified that all kits have been installed and all corrective actions have been completed. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-974 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Arrow Manufacturing, Inc. Submission Date : SEP 19, 2022 NHTSA Recall No. : 21V-974 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : Arrow Manufacturing, Inc. Address : 801 S East St. Rock Rapids IA 51246 Company phone : 712-261-3157 Population : Number of potentially involved : 20 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2021 Ram 4500/5500 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The recall population was determined based on the suspension kit serial numbers and conversion kits built and sold within the identified production dates. The recall affects all 2019+MY suspension kits and converted 2014-2018 MY converted suspension kits installed on 2019+ MY RAM 4500/5500 cab chassis. Suspension kits built for and installed on 2014-2018 MY RAM 4500/5500 cab chassis are not affected by the recall because the OEM rear brake caliper flexible line has sufficient length to provide clearance with suspension component(s). 2019+MY RAM 4500/5500 cab chassis OEM rear brake caliper flexible line is shorter than 2014-2018 MY RAM 4500/5500 cab chassis, thus caused potential contact with suspension component(s). Production Dates : MAY 01, 2018 – APR 22, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The rear brake caliper flexible line may have been routed such that it may be causing rear brake caliper flexible line wear due to contact with a suspension component(s). FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The consequence of the defect can be rear brake caliper flexible line wear Description of the Cause : NR Identification of Any Warning that can Occur : NR Part 573 Safety Recall Report 21V-974 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Brake Line Component Description : Rear Brake Caliper Flexible Line Component Part Number : NR Supplier Identification : Component Manufacturer Name : Liquid Spring LLC Address : 4899 E 400 South Lafayette Indiana 47905 Country : United States Chronology : 1st Reported Instance – December 12, 2019 – In the case of the 1st reported instance, a customer installing a RAM 4500/5000 rear suspension kit contacted LiquidSpring Customer Service to report contact between the driver side (LH) rear brake caliper flexible line and the lower axle clamp suspension component. Review of customer submitted pictures confirmed contact. Customer reworked the LH rear brake caliper flexible line routing to eliminate contact issue. There had been no other previously reported contact between the rear brake caliper flexible line and suspension component(s) from installers, dealers, or end users of the affected product. Chronology : February 10, 2020 – LiquidSpring contacted RAM dealer to obtain rear brake caliper flexible line P/N’s for MY 2018, 2019, and 2020 RAM 4500/5500 cab chassis. RAM dealer provided part number information for the rear brake caliper flexible line indicated that the P/N for MY 2019 and 2020 was the same but different from MY2018. Because physical information such as length of the line was not available for comparative purposes, LiquidSpring ordered both rear brake caliper flexible lines for MY 2018 and 2019/20. Only MY 2018 part was received, MY 2019/20 was backordered with delivery date indeterminate. February 14, 2020 – LiquidSpring began effort to develop banjo manifold block to install between the rear brake caliper and the rear brake caliper flexible line to re-orient the brake line banjo mount and provide an effective longer line length for clearance with the lower axle clamp suspension component. March 16, 2020 – LiquidSpring began effort to modify the lower axle clamp suspension component to provide clearance for the rear brake caliper flexible line without utilizing banjo manifold block. March 24, 2020 Trial installation of the developed banjo manifold block between the rear brake caliper and the rear brake caliper flexible line along with re-orientation of the brake line banjo mount. Part 573 Safety Recall Report 21V-974 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : A kit, P/N 11849, has been generated consisting of 2 OEM banjo bolts, 8 crush washers, 2 banjo blocks, and installation instructions to install the banjo blocks on each rear caliper and modify the rear brake caliper flexible line mounting. A kit, P/N 11871, has been generated with OEM replacement rear brake caliper flexible lines and hardware required to replace worn rear brake caliper flexible lines as needed. The company plans to cover all expenses related to the installation of the banjo blocks and/or replacement of worn rear brake caliper flexible lines How Remedy Component Differs from Recalled Component : The presence of the banjo blocks installed between the rear brake caliper from Recalled Component : and the rear brake caliper flexible line distinguishes vehicles that do or don’t have the remedy completed. Identify How/When Recall Condition was Corrected in Production : The ongoing production remedy for the rear brake caliper flexible line contact issue will be the modified lower axle clamp suspension component that provides clearance without utilizing the banjo manifold block. This change was implemented on all suspension kits shipped after April 22, 2020. Arrow installed the kits on (14) trucks still at the factory. (7) affected vehicles needed to be corrected in the field at end user locations. Recall Schedule : Description of Recall Schedule : Liquid Spring contacted (5) end users directly where product was already in the field on (7) total vehicles. A total of (21) vehicles were affected and the remaining (14) kits were installed at Arrow before the finished vehicles left the factory. There are no dealers involved. The original letter was mailed out on 5-13-2020 to customers directly and followed up on 12-16-2021 with the completed 573 report. Planned Dealer Notification Date : DEC 16, 2021 – DEC 16, 2021 Planned Owner Notification Date : DEC 16, 2021 – DEC 16, 2021 * NR – Not Reported

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