Fuel Tubes May Crack and Leak Fuel – 2019-2021 E-One Cyclone 2, Quest 2, 2020-2021 Typhoon N, 2020 Typhoon, & 2021 Cyclone N

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X12 Fuel Injector Supply Line Campaign Procedure The purpose of this campaign is to replace Injector Supply Lines and add Vibration Isolators on the Fuel Lines for cylinders 4, 5, and 6. Verification  Locate Injector Supply Lines on cylinders 4, 5, and 6.  Check to see if there are Vibration Isolators installed on the Injector Supply Lines. See Figure 1 below.  If there are Vibration Isolators installed on Injector Supply Line 4, 5, and 6 then no further action is needed.  If there are NO Vibration Isolators installed on Injector Supply Lines 4, 5, and 6 then proceed with the campaign instructions below. Figure 1: Location and example of what the Injector Supply Line Vibration Isolators look like. (Please note that the lines and Vibration Isolators may be painted if they were installed at the factory.) Recommended Cummins® Service Tools  Contact cleaner, Part Number 3824510, or equivalent  Fuel System Clean Care Kit, Part Number 4919073, or equivalent Required Part Part Description Part Number Quantity Kit with 3 Vibration Isolators and Injector Supply Lines 4, 5, and 6 6319267 1 Service Instructions Follow the steps below to remove the Fuel Injector Supply Lines for cylinders 4, 5, and 6 and replace with new Fuel Injector Supply Lines with Vibration Isolators supplied in the parts kit. 1. Before starting the removal and installation of the Injector Supply Lines, loosen the pump to rail line at the rail to vent the fuel pressure. Keep your hand clear of the line when loosening the fuel rail nut. See Figure 2. Figure 2: Location for relief of fuel pressure in the system 2. Tighten the fuel rail nut back to 31 Nm (23 ft‐lbs). 3. Disconnect the batteries. See equipment manufacturer service information. 4. Clean the fittings and area around the connection points for Injector Supply Lines 4, 5, and 6 using electrical contact cleaner. 5. Remove Injector Supply Lines 4, 5, and 6. 6. Cover the openings with clean care caps. 7. Break the capscrews for the fuel rail loose and then tighten them back up just enough so the fuel rail does not move. DO NOT fully torque the fuel rail capscrews back down. 8. Install a Vibration Isolator on each of the Fuel Injector Supply Lines 4, 5, and 6. a. Make sure the Vibration Isolators are installed firmly on the straight section on the upper half of the Fuel Injector Supply Lines. b. Make sure there is a gap between the Vibration Isolator on Fuel Injector Supply Line #5 and the Crankcase Breather Tube. See figure 3. i. If there is contact between the Vibration Isolator and the Crankcase Breather tube, then you either need to try to position the Crankcase Breather Tube better or you can slide the Vibration Isolator up the fuel line farther. The Vibration Isolator must NOT be positioned past the bend in the fuel line. See Figure 4 below to see where the Vibration Isolators can be installed. ii. Some configurations may have other interferences as well, see figure 5. The Vibration Isolator must not come in contact with any other component. Figure 3: Example of the gap that should be present between the Vibration Isolator on Fuel Injector Supply Line #5 and the Crankcase Breather Tube Figure 4: Visual reference for where the Fuel Injector Supply Line the Vibration Isolators can be installed. The Vibration Isolators MUST be installed between the bends of the fuel line or between the red lines in the example above. Figure 5: Some configurations may have a Compressor Air Inlet Tube going above line #5. Make sure the Vibration Isolator does not come into contact with this tube or any other component. 9. Using clean engine oil, lubricate the three Fuel Injector Line grommets in the rocker cover before fitting the Fuel Injector Lines. 10. Install the Fuel Injector Supply Lines one at a time following the steps below. a. Hand tighten the Fuel Injector Line Nut at the Injector. Make sure the lines are centered within the nut. b. Hand tighten fuel line nut at the rail. Make sure the line is centered within the nut. c. Torque the injector end of the Fuel Injector Line to 31 Nm (23 ft‐lb). d. Torque the Fuel Rail end of the Fuel Injector Line to 31 Nm (23 ft‐lb). 11. Repeat steps a – d for the other two Fuel Injector Supply Lines. 12. Torque the capscrews for the rail to 46 Nm (36 ft‐lb). 13. Connect the batteries. See equipment manufacturer service information. 14. It is not necessary to vent air from the high‐pressure fuel system before starting the engine. Cranking the engine will prime the fuel system. 15. Operate the engine. Check for leaks. 16. Destroy the 3 Fuel Injector Supply Lines that were removed from the engine.

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1 January 5, 2022 SAFETY RECALL NOTICE: 21V-952 TO: All E-ONE Dealers E-ONE has decided that a safety defect exists in certain E-ONE CYCLONE 2, CYCLONE N, QUEST 2, TYPHOON, TYPHOON N vehicles manufactured from April 2019 through November 2021 equipped with Cummins ISX12 Engines. Accordingly, a recall to address this issue is being initiated effective January 5, 2022. The fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. Fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Owners will be notified by mail about the recall and will be instructed by on how to proceed. Cummins has stated. The subject fuel tubes for cylinders 4, 5 and 6 (the rear half of the engine) will be replaced with new fuel tubes (having the same part number as the recalled components) and vibration isolators will be added to the fuel tubes. The estimated repair time will be 2 hours. A recall-specific reimbursement plan will be provided on the Recall Portal for those units not covered by the manufacturer’s limited warranty. There is no cost to owners for this recall. Cummins is providing, free of charge, the necessary components and instructions to rectify the issue and will pay labor costs for inspecting and replacing the included components that have not already been replaced during normal maintenance. Please be reminded that it is a violation of Federal law for you to sell, lease or deliver a new or used CYCLONE 2, CYCLONE N, QUEST 2, TYPHOON, TYPHOON N equipped with Cummins ISX12 Engines covered by this notification until this recall has been performed on these CYCLONE 2, CYCLONE N, QUEST 2, TYPHOON, TYPHOON N. Substantial civil penalties apply to violations of this law. Your assistance with this recall is appreciated. Should you have any questions or concerns, please contact E-ONE Customer Service at (352) 237-1122. Sincerely. Leroy Stephens Lead Engineer – APD (352) 861-5044 lstephens@e-one.com

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-952 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : E-One Incorporated Submission Date : DEC 09, 2021 NHTSA Recall No. : 21V-952 Manufacturer Recall No. : NR Manufacturer Information : Manufacturer Name : E-One Incorporated Address : 1601 S.W. 37TH AVENUE Ocala FL 34474 Company phone : (904) 237-1122 Population : Number of potentially involved : 140 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2019-2021 E-ONE Cyclone 2, Cyclone N, Quest 2, Typhoon, Typhoon N Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The recall population was determined by engine serial numbers provided by Cummins The recalled products differ from other products by the engine serial numbers QTY: 25 – 2019 Cyclone 2 vehicles are affected QTY: 1 – 2019 Quest 2 vehicles are affected QTY: 53 – 2020 Cyclone 2 vehicles are affected QTY: 1 – 2020 Quest 2 vehicles are affected QTY: 1 – 2020 Typhoon vehicles are affected QTY: 10 – 2020 Typhoon N vehicles are affected QTY: 21 – 2021 Cyclone 2 vehicles are affected QTY: 8 – 2021 Cyclone N vehicles are affected QTY: 1 – 2021 Quest 2 vehicles are affected QTY: 19 – 2021 Typhoon N vehicles are affected Production Dates : APR 02, 2019 – NOV 30, 2021 VIN Range 1 : Begin : 4ENLAAA80K1002459 End : 4ENLAHA8XM2004239 ✔ Not sequential Description of Defect : Description of the Defect : The fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak. FMVSS 1 : NR FMVSS 2 : NR Part 573 Safety Recall Report 21V-952 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Safety Risk : A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire. Description of the Cause : The subject fuel tubes (for cylinders 4, 5 and 6) are susceptible to cracking due to metal fatigue resulting from a combination of vibration strain, assembly strain and material strength. Identification of Any Warning that can Occur : Fuel leaks may be detected during maintenance. An operator may smell fuel or observe a mist due to the fuel leak. Involved Components : Component Name 1 : Fuel injector tube Component Description : Fuel injector tube from the fuel rail to the injector Component Part Number : Unknown Supplier Identification : Component Manufacturer Name : Cummins, Inc Address : Box 3005 Mail Code 41303 Columbus Indiana 47202-3005 Country : United States Chronology : Refer to NHTSA Recall 21E-099 for the Cummins chronology. E-ONE was informed of this Recall on 3 December 2021 Description of Remedy : Description of Remedy Program : The subject fuel tubes for cylinders 4, 5 and 6 (the rear half of the engine) will be replaced with new fuel tubes (having the same part number as the recalled components) and vibration isolators will be added to the fuel tubes. A recall-specific reimbursement plan will be provided on the Recall Portal for those units not covered by the manufacturer’s limited warranty. How Remedy Component Differs from Recalled Component : The replacement fuel tubes will also have vibration isolator. The fuel tube and vibration isolator combination will have a new part number. Part 573 Safety Recall Report 21V-952 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Identify How/When Recall Condition was Corrected in Production : All affected engine part numbers on the premises were reviewed for the engine serial number to determine whether it was affected by this Recall. All trucks/engines affected by this Recall were Red Tagged and are in the Red Tag Process to prevent shipping. Recall Schedule : Description of Recall Schedule : 1) Email dealers a copy of the recall approximately 1 week before customers. 2) Mail customers the recall Planned Dealer Notification Date : JAN 10, 2022 – JAN 17, 2022 Planned Owner Notification Date : JAN 24, 2022 – JAN 31, 2022 * NR – Not Reported

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