SC0456 – Hendrickson Aux Lift Axle – 2024 Mack Granite

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MACK TRUCKS
RECALL ALERT
© Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document.
Description
Vehicles may be equipped with Hendrickson Composilite EXS20 and SC 20 steerable auxiliary lift axle suspension assemblies with bearing journals not fully seated to the backbones of the left and right-side steering knuckle assembly in order for the wheel end hub assemblies to be properly installed. This can result in foreign object debris on the roadway, increasing the risk of a crash and/or injury. There have been no field reports, warranty claims or customer complaints associated with this issue. Vehicles will be inspected to identify suspect Hendrickson Composolite EXS20 and SC 20 steerable auxiliary lift axle suspension assemblies, those which are suspect will be repaired following Hendrickson’s Instructions. Model and Model Years Affected
• Certain 2024 Granite model vehicles manufactured September 27, 2023, through November 28, 2023.
Vehicle Quantities
• 5 vehicles (all 5 US) Dealer Responsibilities
• The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer.
• Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer. Notification Release Schedule
• Vehicle list will be posted on the Trucks Dealer Portal on December 22, 2023.
• Owner notification letters will be released on or before February 08, 2024.
• Repair Instruction will be released once they are available. Contact
If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.
Subject: Safety Recall SC0456, Hendrickson Aux Lift Axle
Recall Number: SRA-M456
Date: December 22, 2023
Applicable Markets: ☒U.S. ☐Canada ☐ Export

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-887
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Mack Trucks, Inc. DEC 22, 2023 NHTSA Recall No. : 23V-887 Manufacturer Recall No. : SC0456
Manufacturer Information :
Manufacturer Name : Mack Trucks, Inc.
Address : 2100 Mack Boulevard
PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131
Population :
Number of potentially involved : 5
Estimated percentage with defect : 95 %
Vehicle Information :
Vehicle 1 : 2024-2024 Mack Granite
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The recall population is vehicles built with specific (by serial number) Hendrickson Composilite EXS20 and SC 20 steerable auxiliary lift axle suspension assemblies and individual steering knuckle assembly components equipped with bearing journals that may not have been seated correctly to the backbones of the left and right-side steering knuckle assembly components during manufacture. Production Dates : SEP 27, 2023 – NOV 11, 2023
VIN Range 1 : Begin : 1M2GR4NC1RM004963 End : 1M2GR4NC8RM005026 ✔ Not sequential Description of Defect :
Description of the Defect : Vehicles may be equipped with Hendrickson Composilite EXS20 and SC 20 steerable auxiliary lift axle suspension assemblies with bearing journals not fully seated to the backbones of the left and right-side steering knuckle assembly in order for the wheel end hub assemblies to be properly installed. FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : As reported by Hendrickson: In some cases, the above-referenced condition may cause a loss of oil lubricant from the wheel end hub assemblies. Over an extended period of operation, use of the lift axle suspension assemblies in this condition can result in (1) the respective axle spindles to become loose from the steering knuckle assemblies or otherwise fracture and/or (2) wheel end hub damage. This can result in foreign object debris on the roadway,
increasing the risk of a crash and/or injury. As reported by Hendrickson they Part 573 Safety Recall Report 23V-887 Page 2 had not received any field reports of any such occurrences or any associated accidents.
Description of the Cause : Hendrickson reports that the cause identified as excessive wear on the tooling used to install the journal rings and inadequate quality measurements performed after such installations. Identification of Any Warning
that can Occur : Potential signs of oil lubricant leaking from the wheel end hub assemblies. Involved Components : Component Name 1 : Hendrickson Composilite
Component Description : steerable auxiliary lift axle suspension assemblies Component Part Number : EXS20 and SC20 Supplier Identification : Component Manufacturer
Name : Hendrickson USA, L.L.C. Address : 101 S. Progress Drive
Kendallville Indiana 46755
Country : United States Chronology :
November 17, 2023, Volvo Product Safety Office receives a report of a potential issue with Hendrickson Auxiliary axles where the bearing journal is not fully installed, and a formal investigation is opened.
November 27, 2023, after review by Product Safety Evaluation Commitee a request is made to Hendrickson to provide their safety inputs to their product issue.
December 18, 2023, Hendrickson provides formal notification that they have filed an equipment recall Composilite EXS20 and SC20 steerable auxiliary lift axle suspension assemblies and individual steering knuckle assembly components equipped with bearing journals that may not have been seated correctly to the backbones of the left and right-side steering knuckle assembly components during manufacture.
December 18, 2023, Volvo Product Safety Committee meets and reviews Hendrickson’s filing and impacts on our product and decides that a product safety defect exists.
December 22, 2023, DIR 573 Report filed with NHTSA. There have been no accidents or injuries related to this issue, there have been no warranty claims, field reports The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-887
Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
or customer complaints associated with this issue.
Description of Remedy :
Description of Remedy Program : “Vehicles will be recalled and inspected to identify suspect Hendrickson
Composolite EXS20 and SC 20 steerable auxiliary lift axle suspension assemblies, those which are suspect will be repaired following Hendrickson’s Instructions.
Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA.” How Remedy Component Differs from Recalled Component : The replacement steering knuckle assemblies will include journal rings that are fully seated into the knuckle backbones. Steering knuckle assemblies, Composilite EXS20 and SC20, 20K Identify How/When Recall Condition was Corrected in Production : Our assembly facilities were inspected for suspect auxiliary axle assemblies and those axles identified by Hendrickson were contained and corrected December 13, 2023. Recall Schedule :
Description of Recall Schedule : Dealer notification will begin on December 29, 2023, and owner
notification will begin on or before February 8, 2024.
Planned Dealer Notification Date : DEC 29, 2023 – DEC 29, 2023
Planned Owner Notification Date : FEB 08, 2024 – FEB 08, 2024
* NR – Not Reported

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