CSN858 – Overload Protection System May Not Function – 2016-2022 Altec E-series & DH-H Series Digger Derricks

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Customer Outreach PO Box 8338 product.safety@altec.com Phone 1-877-GO ALTEC Saint Joseph, MO 64508 connect.altec.com/login Facsimile 1-877-659-9929 IMPORTANT SAFETY RECALL This notice applies to your vehicle. Refer to the provided list. NHTSA Recall Number: Altec Identifier: Transport Canada Number: Dear Altec Owner, For US owners, this notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. For Canadian owners, this notice is sent to you in accordance with the requirements of the Motor Vehicle Safety Act. This is to inform you that your vehicle may contain a defect that could affect the safety of a person. Altec Industries, Inc. has decided that a defect which relates to motor vehicle safety exists in certain DH45/48/50B, DH45/48/50E, DH45/48/50H, DM45/47E, and D3050/3055/ 3060E series digger derricks units built from January 2016 to February 2022. Due to improper wiring, the Hydraulic Overload Protection (HOP) system may not activate when overloading occurs. Repeated overloading due to HOP not activating could damage the boom or other unit structures. Death or serious injury could result from structural failure of the unit. Refer to the included notice for the items covered under the Altec Warranty Policy. If you had this repair performed before you received this notice, you may be eligible to receive reimbursement for the cost of obtaining a pre-notification remedy of the problem associated with this recall. All work will be performed at no charge to the customer when presented for repair. Compare your unit’s identifying information with the provided list to verify your unit is affected. You may also contact Altec or view your fleet through Altec Connect to determine if there are any other outstanding notices. The inspection can be performed by the customer, or you may contact Altec for further assistance. The wiring inspection and correction of HOP connections, if required, is estimated to take 30 minutes and 1 person to complete. If the connections are found to be incorrect, the additional structural inspection is required, which is estimated to take 1 hour and 1 person to complete. If you have sold or retired the unit, update the records through Altec Connect. If you have leased this equipment to another person or company, you are required by Federal Law to forward a copy of this notice to the lessee by first class mail within ten (10) days of the receipt of this notice. For US owners: After contacting Altec, if you are still not able to have the safety condition remedied without charge and within a reasonable time, you may submit a complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590 or call toll-free 1-888-327-4236 (TTY: 1-800-424-9153) or go to http://www.safercar.gov. For Canadian Owners: If you are still not able to have the safety condition remedied by your dealer within a reasonable time, please contact Altec. We regret this inconvenience; however, we are taking this action in the interest of your safety and continued satisfaction with Altec products. Thank you for your immediate attention on this important matter. 22V-349 CSN 858 June 29, 2022 2022-272 Page 1 of 5 Customer Service Notice CSN Released: June 29, 2022 Altec Use Only Inspection labor 0.5 hr wiring, 1.0 hr structural Repair labor 0.0 hr Account # 010.0337.43151.000.9234.000 Travel Not included NHTSA code 11 Prime fail P/N N/A Doc ref N/A Altec Use Only Description Part No. Qty Warranty N/A N/A N/A N/A 858 HOP System Connections Inspection Units Affected: Certain DH45/48/50B, DH45/48/50E, DH45/48/50H, DM45/47E, and D3050/3055/ 3060E series digger derricks built from January 2016 to February 2022. Verify your unit is affected by reviewing the attached list or accessing Altec Connect. Background: All Altec derricks are equipped with a Hydraulic Overload Protection (HOP) system to help prevent overloading of the unit. Altec has learned that the turntable wiring harness on the affected units may have been connected improperly to the pressure transducers on the lift cylinder, preventing the HOP system from activating when overloading occurs. WARNING Death or serious injury could result from structural failure of the unit. Repeated overloading due to HOP not activating could damage the boom or other unit structures. Customer Action: Use the Wiring Inspection Procedure beginning on page 2 to check the connections and correct them if required. Do this no later than the next preventive maintenance interval or 30 days from the receipt of this CSN, whichever comes first. Requirements: The wiring inspection and correction of connections, if required, is estimated to take 30 minutes and 1 person to complete. If the HOP connections are found to be incorrect, the additional structural inspection is required, which is estimated to take 1 hour and 1 person to complete. Completion and Warranty: The inspection and repair are covered under the Altec Warranty Policy and can be performed by Altec, the customer, or the customer’s warranty provider. Altec will perform the work for free at an Altec facility. If the customer or the customer’s warranty provider performs the work, a warranty claim must be submitted to be reimbursed for the cost of the labor. Altec will allow up to $45 for the labor to perform the wiring inspection, and up to $90 for the labor to perform the structural inspection, if required. Customers are responsible for the travel costs of an Altec Mobile Service technician if the technician performs the work at the owner’s location. Altec Contact Info: Altec Connect: connect.altec.com/login Phone: 1-877-GO ALTEC (1-877-462-5832) | Options: 1 – Parts; 2 – Shop Service; 3 – Mobile Service; 4 – Technical Support; 5 – Global Rental Service Request; 6 – Chassis Repair Page 2 of 5 CSN 858 Wiring Inspection Procedure: No tools are required for this procedure. Read and understand all steps of the instructions before beginning the procedure. 1. Position the unit on a level surface, apply the parking brake, and turn off the engine. Remove the key from the ignition, and secure it following your employer’s vehicle lockout/tagout procedure. Chock the wheels. 2. Find the load holding valve block on the lift cylinder, located on one side near the turntable (refer to Figure 1). 3. Locate the two pressure transducers installed in the ports stamped “TE1” and “TR1” on the valve block (refer to Figure 2). 4. Visually inspect the two connectors from the turntable wiring harness attached to the pressure transducers. Both connectors have a red wire and a black wire. The connectors have a different color third wire and different label wording. The connector with a white/blue third wire and the label “LIFT BORE PRESS” should be attached to the transducer in the TE1 port, and the connector with a white/ brown third wire and the label “LIFT ROD PRESS” should be attached to the transducer in the TR1 port (refer to Figures 3 and 4). Lift Cylinder Turntable Figure 1 — Load Holding Valve Block Location Transducer in TE1 Port Transducer in TR1 Port Figure 2 — Pressure Transducers (DH Series Shown, Other Models May Vary) Page 3 of 5 CSN 858 5. Review the inspection results from step 4. • If the connections are reversed from the proper transducers, unplug them and attach them to the opposite transducers as shown in Figures 3 and 4. Proceed to step 6. • If the connectors are attached to the proper transducers, proceed to step 8. Structural Inspection Procedure: 6. Inspect the unit for visible damage from overloading due to the non-functioning HOP system. Include the components shown in the checklist in Figure 5, based on the 500 PTO Hours/6 Months section of the Preventive Maintenance and Inspection Checklist in the Appendix of the unit’s Maintenance manual. 7. Review the inspection results. • If any concerns are found, take the unit out of service, and contact Altec Service for repairs. Proceed to step 8 after repairs are completed. • If no concerns are found, proceed to step 8. Figure 3 — Proper Connector on Transducer in TE1 Port Figure 4 — Proper Connector on Transducer in TR1 Port White/Blue Wire White/Brown Wire Labeled LIFT BORE PRESS Labeled LIFT ROD PRESS Symbol Component Criteria Subbase mounting Fasteners secure, welds intact, no cracks Subbase structure Welds intact, no cracks Pedestal mounting Welds intact, no cracks Outriggers mounting Welds intact, no deformation or cracks Pedestal structure Welds intact, no deformation or cracks Turntable structure Welds intact, no deformation or cracks Rotation bearing cap screws Visual inspection per Maintenance Manual Lower boom structure Welds intact, no deformation or cracks Intermediate boom structure Welds intact, no deformation or cracks Upper boom fiberglass structure Undamaged Upper boom tip structure No deformation or cracks Winch line Condition per Maintenance Manual Symbols: ü/O = Okay R = Repair/replacement required U = Unsafe to operate Figure 5 — Inspection Checklist Page 4 of 5 CSN 858 Completion 8. Put the unit back into service. 9. Complete the Inspection Sheet at the end of the CSN and return it to Altec. Model Altec Unit Serial Number Date Inspected Company Name: _______________________________________________ Phone____________________________ Service Company Name:_________________________________________ Phone:___________________________ Company Contact: _________________________________________________________________________________ Company Street Address:_____________________________________________________________________________ City: _______________________________________________State/Province:_________________________________ ZIP/Mailing Code:___________________________________Country:________________________________________ Signature:__________________________________________ Complete this form and submit it to Altec to document inspection completion. Choose one of these options for submission. • Online through the customer portal – Altec Connect* Sign in or Register for an account at connect.altec.com/login 1. Select Equipment 2. Select Altec Product Notices 3. Select Report a Completed APN • Scan and Email to product.safety@altec.com • FAX to 1-877-659-9929 • Mail to: Customer Outreach; PO Box 8338; Saint Joseph, MO 64508 Submission of this form does not order parts or schedule service from Altec. * If the customer or the customer’s warranty provider performs the repair, submit a warranty claim through Altec Connect to be reimbursed for the cost of the parts and/or labor. Contact Altec for more information or to schedule the work to be done by Altec. Make copies of this form for additional units if needed. Page 5 of 5 CSN 858 Inspection Sheet Scan here to access Altec Connect.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-349 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Altec Industries, Inc. Submission Date : MAY 18, 2022 NHTSA Recall No. : 22V-349 Manufacturer Recall No. : CSN 858 Manufacturer Information : Manufacturer Name : Altec Industries, Inc. Address : 210 Inverness Center Drive Birmingham AL 35242 Company phone : 205 991 7733 Population : Number of potentially involved : 477 Estimated percentage with defect : 30 % Vehicle Information : Vehicle 1 : 2016-2022 Altec E-series & DH-H series digger derricks Vehicle Type : Body Style : Power Train : NR Descriptive Information : E-series and DH-H series units produced between the affected dates with the HOP time delay relay are included in the recall population. The recall population was determined from a review of production records. Production Dates : JAN 01, 2016 – FEB 02, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : In order to complete the stability test on a digger derrick, the connectors to a relay are disconnected to prevent the hydraulic overload protection system from activating during the stability test. On the affected units, there is a possibility that the connectors were reattached to the incorrect plug. If the connections are not correct, the hydraulic overload protection system will not function properly. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : On affected units, if an operator attempts to lift a load greater than the unit’s capacity, the hydraulic overload protection system will not activate. Repeatedly overloading the unit could result in structural damage or failure resulting in serious injury or death. Description of the Cause : NR Identification of Any Warning that can Occur : The load indicator gauge and/or pressure gauge at the operator’s station will continue to operate properly. It will rise into the overload region when lifting a load that exceeds the unit capacity. Part 573 Safety Recall Report 22V-349 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Time Delay Relay Component Description : Time Delay Relay Component Part Number : 970530005 Supplier Identification : Component Manufacturer Name : Altec Inc. Address : 2106 S Riverside Rd Saint Joseph Missouri 64507-2535 Country : United States Chronology : On February 18, 2022, a customer notified Altec that while testing a unit, they found that the hydraulic overload protection system was not activating as expected. The customer determined the cause to be that the plugs on their unit were in the incorrect position. On February 21, 2022, Altec confirmed that stability testing was the last step in the build process where the transducers are disconnected to bypass hydraulic overload protection and hydraulic overload protection is not tested again. On February 21, 2022, Altec opened a non-conformance and a potential field action to evaluate the stability test work process. The production records were also reviewed to determine what models might be affected and the field population of those units. On May 13, 2022, Altec determined that a potential defect could be present in a specific field population and decided that a field campaign was required. There have been no warranty claims or additional field reports identified. There have been no accidents, injuries or deaths related to this issue. Part 573 Safety Recall Report 22V-349 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : The recall remedy includes an inspection to determine if the plugs are properly connected. If the plugs are incorrect, they will be swapped to the correct connection. The recall remedy will be completed free of charge when presented for repair. The Altec Warranty Policy covers the recall remedy, including cases requiring reimbursement for the cost of obtaining a pre-notification remedy of the problem associated with this recall. How Remedy Component Differs from Recalled Component : The hydraulic overload protection system will function as designed when the plugs are connected to the proper connection. No components are replaced or added to the system. Identify How/When Recall Condition was Corrected in Production : The stability pad associates received additional training to instruct them to disconnect one plug instead of both when bypassing the hydraulic overload protection system. Identification tags have been added to identify the plugs clearly, and the plugs are being updated to different shapes to prevent the switching of the plugs. The unit software will be updated to disable the unit if the connections are switched and not to require the removal of the plug to bypass HOP. Recall Schedule : Description of Recall Schedule : Altec will issue CSN 858 to the owners of the affected units. Altec does not have a dealer network and issues letters to owners only. Planned Dealer Notification Date : JUL 15, 2022 – JUL 15, 2022 Planned Owner Notification Date : JUL 15, 2022 – JUL 15, 2022 * NR – Not Reported

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